Energy and Built Environment最新文献

Optimizing kitchen ventilation with an integrated stove air supply-exhaust system for reducing PM2.5 intake fraction and enhancing energy efficiency 优化厨房通风，采用一体化炉具送风排风系统，减少PM2.5的吸入，提高能源效率

Q1 Engineering

Energy and Built Environment

Pub Date : 2026-02-01 DOI: 10.1016/j.enbenv.2024.10.003

Yu Liu, Chong Li, Hongqiang Ma, Xinmei Luo

Ensuring good ventilation is crucial for reducing the pollution caused by cooking activities in the indoor environment. Among them, fume exhaust devices as a vital component of kitchen ventilation, and their performance is particularly critical. Merely increasing the air volume of exhaust devices to remove fumes not only leads to the higher energy consumption of exhaust fans, but also has limited practical effect on reducing pollution. For improving the ventilation condition and reducing the energy consumption of supply and exhaust fan, a new ventilation system for kitchen with integrated stove air supply-exhaust (ISASE) was developed in this study. Firstly, the orthogonal experiment was utilized for arranging different combination schemes of five influencing factors, including the emission rate, exhaust flow, upper air supply angle, upper and lower air supply velocities. Then, the effect of ISASE in reducing the intake fraction of PM_2.5 under each scheme was studied by using the computational fluid dynamics method. The energy consumption of this system under different ventilation schemes was investigated with on-site testing. Finally, performance-gaining rate was proposed by introducing intake fraction reduction rate and energy consumption growth rate to quantitatively evaluate the performance advantage of ISASE. Polynomial fitting was also used to explore the energy-saving effect of ISASE at high emission rate. The results showed that at low, medium, and high emission rates, the intake fraction of PM_2.5 was reduced by 65.0 %–84.2 %. However, the energy consumption of ISASE merely increased by 7.4 %–16.8 % compared with traditional integrated stove without air supply conditions. Its maximum performance-gaining rate reached 0.49–0.66. The energy-saving rate of ISASE was 46.7 % compared with traditional integrated stove without air supply when the same intake fraction was achieved at high emission rate. The practical schemes of ISASE at different emission rates were given in this study, which optimized the working performance of integrated stove and provided a useful reference for its innovative design.

确保良好的通风对于减少烹饪活动对室内环境造成的污染至关重要。其中，排烟装置作为厨房通风的重要组成部分，其性能尤为关键。单纯增加排烟装置的风量来排烟，不仅会导致排风机的能耗增加，而且对减少污染的实际效果有限。为改善厨房通风条件，降低送风机和排风机的能耗，设计了一种新型的厨房综合送风机系统。首先，利用正交试验对排放率、排气流量、上送风角度、上送风速度和下送风速度5个影响因素的不同组合方案进行了排序。然后，采用计算流体力学方法研究了ISASE在各方案下降低PM2.5进气分数的效果。通过现场试验研究了该系统在不同通风方式下的能耗。最后，通过引入进气分数降低率和能耗增长率，提出了性能增益率，定量评价了ISASE的性能优势。采用多项式拟合的方法探讨了ISASE在高排放率下的节能效果。结果表明，在低、中、高排放速率下，PM2.5的进气分数降低了65.0% ~ 84.2%。然而，与无送风条件的传统集成炉相比，ISASE的能耗仅增加了7.4% - 16.8%。其性能增益率最高可达0.49-0.66。在相同进气分数和高排放率的情况下，与传统不送风一体化炉相比，ISASE的节能率为46.7%。本文给出了不同排放速率下ISASE的实用方案，优化了一体化炉具的工作性能，为其创新设计提供了有益的参考。

{"title":"Optimizing kitchen ventilation with an integrated stove air supply-exhaust system for reducing PM2.5 intake fraction and enhancing energy efficiency","authors":"Yu Liu, Chong Li, Hongqiang Ma, Xinmei Luo","doi":"10.1016/j.enbenv.2024.10.003","DOIUrl":"10.1016/j.enbenv.2024.10.003","url":null,"abstract":"<div><div>Ensuring good ventilation is crucial for reducing the pollution caused by cooking activities in the indoor environment. Among them, fume exhaust devices as a vital component of kitchen ventilation, and their performance is particularly critical. Merely increasing the air volume of exhaust devices to remove fumes not only leads to the higher energy consumption of exhaust fans, but also has limited practical effect on reducing pollution. For improving the ventilation condition and reducing the energy consumption of supply and exhaust fan, a new ventilation system for kitchen with integrated stove air supply-exhaust (ISASE) was developed in this study. Firstly, the orthogonal experiment was utilized for arranging different combination schemes of five influencing factors, including the emission rate, exhaust flow, upper air supply angle, upper and lower air supply velocities. Then, the effect of ISASE in reducing the intake fraction of PM<sub>2.5</sub> under each scheme was studied by using the computational fluid dynamics method. The energy consumption of this system under different ventilation schemes was investigated with on-site testing. Finally, performance-gaining rate was proposed by introducing intake fraction reduction rate and energy consumption growth rate to quantitatively evaluate the performance advantage of ISASE. Polynomial fitting was also used to explore the energy-saving effect of ISASE at high emission rate. The results showed that at low, medium, and high emission rates, the intake fraction of PM<sub>2.5</sub> was reduced by 65.0 %–84.2 %. However, the energy consumption of ISASE merely increased by 7.4 %–16.8 % compared with traditional integrated stove without air supply conditions. Its maximum performance-gaining rate reached 0.49–0.66. The energy-saving rate of ISASE was 46.7 % compared with traditional integrated stove without air supply when the same intake fraction was achieved at high emission rate. The practical schemes of ISASE at different emission rates were given in this study, which optimized the working performance of integrated stove and provided a useful reference for its innovative design.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 227-238"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of pollution removal mechanisms in steep-asymmetric city-type environments using wind deflectors 利用导风板评估陡峭不对称城市型环境中的污染清除机制

Q1 Engineering

Energy and Built Environment

Pub Date : 2026-02-01 DOI: 10.1016/j.enbenv.2024.07.007

Madhavan Vasudevan , Francesco Pilla , Aonghus McNabola

Traffic emissions directly impact indoor air quality in near-road buildings. Adjustable wind deflectors on building roofs were previously shown to be effective in mitigating air pollution for ideal city-type environments. This was based on the hypothesis that wind deflectors promoted higher pollutant removal by reducing the dependence on turbulent fluctuations. However, the question of whether such a deflector system would work in a more complex city-type environment such as an asymmetric street canyon remains unanswered. In addition, the fundamental impact a deflector could impart on flow dynamics within street canyons in the context of pollution removal through differing mechanisms also requires further research. The current study seeks to answer both questions by introducing adjustable wind deflectors for step-up and step-down asymmetric canyons with two traffic flow directions. For the step-down canyon, the deflectors promoted CO reduction in building facades by 73.55% and 34.79% from leeward and windward walls under a Cross Road Pollution (CRP) source. A 16.57% reduction was achieved on side walls under a Side Road Pollution (SRP) source. However, apart from the 13.87% CO reduction across windward walls under the CRP source, the wind deflectors predominantly resulted in detrimental results for step-up canyons. The ratio of pollution exchange rate achieved by mean flow-induced fluxes and total pollution exchange rate (

θ

), Sherwood number is the ratio of convective and diffusive mass transfer (Sh) and average canyon concentration (

{\overline{C}}_{c a n y o n}

) were used as indices to investigate pollution removal mechanisms. Although both

S h v / s {\overline{C}}_{c a n y o n}

and

θ v / s {\overline{C}}_{c a n y o n}

relationships exhibited good inverse correlations when the deflector was positioned at different locations, the

S h v / s {\overline{C}}_{c a n y o n}

showed superior performance in distinguishing the scenarios where a deflector was involved and when not. This implies that the introduction of wind deflectors impacted more in effecting convective fluxes than fluctuations for pollution removal.

交通排放直接影响临近道路建筑的室内空气质量。在建筑屋顶上安装可调节的导风板，在理想的城市环境中，对缓解空气污染是有效的。这是基于一个假设，即风偏转器通过减少对湍流波动的依赖来促进更高的污染物去除。然而，这种偏转系统是否能在更复杂的城市环境中发挥作用，比如不对称的街道峡谷，这个问题仍然没有答案。此外，在通过不同机制去除污染的背景下，偏转器对街道峡谷内流动动力学的基本影响也需要进一步研究。目前的研究试图通过引入可调节的风偏转器来回答这两个问题，这些风偏转器用于具有两个交通流方向的上升和下降的不对称峡谷。对于降压峡谷，在十字路口污染源下，偏转板使建筑外立面的CO减少了73.55%和34.79%。在路边污染源下的侧壁减少了16.57%。然而，在CRP源下，除了对迎风壁的CO减少13.87%外，风偏转主要对升坡峡谷造成不利影响。以平均流诱导通量实现的污染交换率与总污染交换率之比（θ）、舍伍德数是对流和扩散传质比（Sh）和平均峡谷浓度(C)为指标，研究污染去除机理。虽然当偏转器位于不同位置时，Shv/sC和θv/sC两种形式的峡谷关系都表现出良好的反相关关系，但Shv/sC在区分涉及偏转器和不涉及偏转器的情况方面表现出优越的性能。这表明，引入风偏转板对对流通量的影响大于对污染去除的波动。

{"title":"Assessment of pollution removal mechanisms in steep-asymmetric city-type environments using wind deflectors","authors":"Madhavan Vasudevan , Francesco Pilla , Aonghus McNabola","doi":"10.1016/j.enbenv.2024.07.007","DOIUrl":"10.1016/j.enbenv.2024.07.007","url":null,"abstract":"<div><div>Traffic emissions directly impact indoor air quality in near-road buildings. Adjustable wind deflectors on building roofs were previously shown to be effective in mitigating air pollution for ideal city-type environments. This was based on the hypothesis that wind deflectors promoted higher pollutant removal by reducing the dependence on turbulent fluctuations. However, the question of whether such a deflector system would work in a more complex city-type environment such as an asymmetric street canyon remains unanswered. In addition, the fundamental impact a deflector could impart on flow dynamics within street canyons in the context of pollution removal through differing mechanisms also requires further research. The current study seeks to answer both questions by introducing adjustable wind deflectors for step-up and step-down asymmetric canyons with two traffic flow directions. For the step-down canyon, the deflectors promoted CO reduction in building facades by 73.55% and 34.79% from leeward and windward walls under a Cross Road Pollution (CRP) source. A 16.57% reduction was achieved on side walls under a Side Road Pollution (SRP) source. However, apart from the 13.87% CO reduction across windward walls under the CRP source, the wind deflectors predominantly resulted in detrimental results for step-up canyons. The ratio of pollution exchange rate achieved by mean flow-induced fluxes and total pollution exchange rate (<span><math><mi>θ</mi></math></span>), Sherwood number is the ratio of convective and diffusive mass transfer (Sh) and average canyon concentration (<span><math><msub><mover><mrow><mi>C</mi></mrow><mo>‾</mo></mover><mrow><mi>c</mi><mi>a</mi><mi>n</mi><mi>y</mi><mi>o</mi><mi>n</mi></mrow></msub></math></span>) were used as indices to investigate pollution removal mechanisms. Although both <span><math><mrow><mi>S</mi><mi>h</mi><mspace></mspace><mi>v</mi><mo>/</mo><mi>s</mi><mspace></mspace><msub><mover><mrow><mi>C</mi></mrow><mo>‾</mo></mover><mrow><mi>c</mi><mi>a</mi><mi>n</mi><mi>y</mi><mi>o</mi><mi>n</mi></mrow></msub></mrow></math></span> and <span><math><mrow><mi>θ</mi><mspace></mspace><mi>v</mi><mo>/</mo><mi>s</mi><mspace></mspace><msub><mover><mrow><mi>C</mi></mrow><mo>‾</mo></mover><mrow><mi>c</mi><mi>a</mi><mi>n</mi><mi>y</mi><mi>o</mi><mi>n</mi></mrow></msub></mrow></math></span> relationships exhibited good inverse correlations when the deflector was positioned at different locations, the <span><math><mrow><mi>S</mi><mi>h</mi><mspace></mspace><mi>v</mi><mo>/</mo><mi>s</mi><mspace></mspace><msub><mover><mrow><mi>C</mi></mrow><mo>‾</mo></mover><mrow><mi>c</mi><mi>a</mi><mi>n</mi><mi>y</mi><mi>o</mi><mi>n</mi></mrow></msub></mrow></math></span> showed superior performance in distinguishing the scenarios where a deflector was involved and when not. This implies that the introduction of wind deflectors impacted more in effecting convective fluxes than fluctuations for pollution removal.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 128-149"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141848033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigation of urban heat island effect in various urban forms 不同城市形态下城市热岛效应的数值研究

Q1 Engineering

Energy and Built Environment

Pub Date : 2026-02-01 DOI: 10.1016/j.enbenv.2024.11.001

Tingzhen Ming , Yachen Liu , Tianhao Shi , Chong Peng , Yanhua Chen , Renaud de Richter , Yueping Fang

The urban heat island effect is a widespread phenomenon in major cities worldwide, exerting significant impacts on urban environments, human health, and energy consumption, thus attracting extensive research interest. The manifestation of the urban heat island effect varies across different urban forms. This study employs a three-dimensional porous media model to comprehensively analyze the urban heat island effect and the influence of wind speed on three typical urban layouts: single-center, multi-center, and grid.

The results indicate: (1) The more dispersed the city center, the weaker the urban heat island intensity, with differences in peak heat island intensity of up to 0.3 K among different urban forms. (2) Under favorable environmental wind conditions, higher wind speeds lead to weaker heat island intensity. At v = 5 m/s, the grid-based heat island intensity decreases by 0.57 K. (3) With increasing building density, the urban heat island effect intensifies in all three types of cities, with the single-center city exhibiting the largest increase in heat island intensity, up to 23.5 %

城市热岛效应是全球主要城市普遍存在的现象，对城市环境、人类健康和能源消费产生了重大影响，引起了广泛的研究兴趣。城市热岛效应的表现在不同的城市形态中存在差异。本文采用三维多孔介质模型，综合分析了城市热岛效应和风速对单中心、多中心和网格三种典型城市布局的影响。结果表明：(1)城市中心越分散，城市热岛强度越弱，不同城市形态之间的热岛强度峰值差异可达0.3 K。(2)在有利的环境风条件下，风速越大，热岛强度越弱。在v = 5 m/s时，网格热岛强度降低0.57 K。③随着建筑密度的增加，三种类型城市的热岛效应都在加剧，其中单中心城市的热岛强度增幅最大，达到23.5%

{"title":"Numerical investigation of urban heat island effect in various urban forms","authors":"Tingzhen Ming , Yachen Liu , Tianhao Shi , Chong Peng , Yanhua Chen , Renaud de Richter , Yueping Fang","doi":"10.1016/j.enbenv.2024.11.001","DOIUrl":"10.1016/j.enbenv.2024.11.001","url":null,"abstract":"<div><div>The urban heat island effect is a widespread phenomenon in major cities worldwide, exerting significant impacts on urban environments, human health, and energy consumption, thus attracting extensive research interest. The manifestation of the urban heat island effect varies across different urban forms. This study employs a three-dimensional porous media model to comprehensively analyze the urban heat island effect and the influence of wind speed on three typical urban layouts: single-center, multi-center, and grid.</div><div>The results indicate: (1) The more dispersed the city center, the weaker the urban heat island intensity, with differences in peak heat island intensity of up to 0.3 K among different urban forms. (2) Under favorable environmental wind conditions, higher wind speeds lead to weaker heat island intensity. At v = 5 m/s, the grid-based heat island intensity decreases by 0.57 K. (3) With increasing building density, the urban heat island effect intensifies in all three types of cities, with the single-center city exhibiting the largest increase in heat island intensity, up to 23.5 %</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 54-65"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the contribution rate of photovoltaic power in indoor ice arenas across different climatic zones: A case study in China 不同气候带室内冰场光伏发电贡献率研究——以中国为例

Q1 Engineering

Energy and Built Environment

Pub Date : 2026-02-01 DOI: 10.1016/j.enbenv.2024.09.001

Yue Yang, Junjie Li, Wen Zhang, Fang Zheng

With the increasing construction of ice arena facilities, addressing their energy consumption issues has become crucial, emphasizing the need for renewable energy utilization. This study aims to determine the contribution rate of photovoltaic (PV) power generation in indoor ice arenas across different climate zones in China and proposes corresponding PV application strategies. By modeling the vertical zoning above the ice arena, energy consumption in indoor ice arenas across six typical cities was simulated, calculating annual and monthly renewable energy contribution rates and proposing utilization strategies. The research reveals a growing proportion of cooling energy consumption due to climate warming, exceeding half of the total energy even in cold cities. Differences in energy consumption and renewable energy contribution rates among cities highlight the impact of local climate conditions. Favorable climates and abundant solar resources in some cities enable more energy-efficient ice arena construction, while high energy consumption and limited solar resources pose challenges in others. The study identifies seasonal variations in renewable energy contribution rates, emphasizing the need to optimize power generation seasonally. In colder cities, summer power generation is essential, while in hotter climates, winter power generation is more advantageous. This study provides insights for designing energy-efficient and sustainable ice arenas.

随着冰场设施建设的不断增加，解决其能耗问题变得至关重要，强调了可再生能源利用的必要性。本研究旨在确定中国不同气候带室内冰场光伏发电的贡献率，并提出相应的光伏应用策略。通过对冰场上方的垂直分区进行建模，模拟了六个典型城市室内冰场的能源消耗，计算了年度和月度可再生能源贡献率，并提出了利用策略。研究表明，由于气候变暖，制冷能源消耗的比例越来越大，即使在寒冷的城市，也超过了总能源的一半。城市间能源消耗和可再生能源贡献率的差异凸显了当地气候条件的影响。一些城市气候条件优越，太阳能资源丰富，这使得冰场建设更加节能，而另一些城市能源消耗高，太阳能资源有限，这给冰场建设带来了挑战。该研究确定了可再生能源贡献率的季节性变化，强调了季节性优化发电的必要性。在寒冷的城市，夏季发电是必不可少的，而在炎热的气候，冬季发电更有利。这项研究为设计节能和可持续的冰场提供了见解。

{"title":"Research on the contribution rate of photovoltaic power in indoor ice arenas across different climatic zones: A case study in China","authors":"Yue Yang, Junjie Li, Wen Zhang, Fang Zheng","doi":"10.1016/j.enbenv.2024.09.001","DOIUrl":"10.1016/j.enbenv.2024.09.001","url":null,"abstract":"<div><div>With the increasing construction of ice arena facilities, addressing their energy consumption issues has become crucial, emphasizing the need for renewable energy utilization. This study aims to determine the contribution rate of photovoltaic (PV) power generation in indoor ice arenas across different climate zones in China and proposes corresponding PV application strategies. By modeling the vertical zoning above the ice arena, energy consumption in indoor ice arenas across six typical cities was simulated, calculating annual and monthly renewable energy contribution rates and proposing utilization strategies. The research reveals a growing proportion of cooling energy consumption due to climate warming, exceeding half of the total energy even in cold cities. Differences in energy consumption and renewable energy contribution rates among cities highlight the impact of local climate conditions. Favorable climates and abundant solar resources in some cities enable more energy-efficient ice arena construction, while high energy consumption and limited solar resources pose challenges in others. The study identifies seasonal variations in renewable energy contribution rates, emphasizing the need to optimize power generation seasonally. In colder cities, summer power generation is essential, while in hotter climates, winter power generation is more advantageous. This study provides insights for designing energy-efficient and sustainable ice arenas.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 28-40"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct and inverse simulations of hydrodynamic and thermal characteristics in a room with random boundary conditions by feedforward neural network modelling 采用前馈神经网络模型对具有随机边界条件的室内水动力和热特性进行了正逆模拟

Q1 Engineering

Energy and Built Environment

Pub Date : 2026-02-01 DOI: 10.1016/j.enbenv.2024.08.005

Mohammad Foruzan Nia, Eric Hu, Mergen H. Ghayesh

Artificial Intelligence (AI) or Neural Network (NN) approaches are starting to be used in built environment areas. This study demonstrates that feedforward neural network (FNN) modelling is capable of simulating the hydrodynamic and thermal characteristics of a room with a radiant heating and cooling system. The FNN model was trained and tested to simulate air velocity and temperature profiles based on boundary conditions as direct simulation and to restore boundary conditions as inverse simulation, using a scaled and normalised database generated by a Computational Fluid Dynamics (CFD) model. In the CFD model, the non-dimensional form of the governing equations, including the radiative transfer equation (RTE) and vorticity equation, were solved using the discrete ordinate method (DOM) and finite difference method (FDM) respectively. The impacts of training database size, hidden layers, and the number of neurons in each layer on the accuracy of the FNN results in the direct and inverse simulations were evaluated in terms of the average root mean square error (RMSE) over the testing data. In the direct simulation, using a smaller CFD database with more hidden layers and neurons achieved comparable accuracy to an FNN trained with a larger CFD database and a less complex FNN. Furthermore, in the inverse simulation, where the FNN model was trained to use a subdomain of temperature profiles to simulate or restore the boundary conditions, the effect of the size of the subdomain on the accuracy in terms of RMSE was studied. It demonstrated that the FNN approach could conduct inverse simulations that are typically beyond the capability of conventional CFD modelling approaches. The results show that the boundary conditions could be accurately restored using subdomains of the temperature profile, covering approximately 60% of the main domain.

人工智能（AI）或神经网络（NN）方法开始在建筑环境领域得到应用。该研究表明，前馈神经网络（FNN）建模能够模拟具有辐射供暖和制冷系统的房间的水动力和热特性。对FNN模型进行了训练和测试，以模拟基于边界条件的空气速度和温度曲线作为直接模拟，并使用由计算流体动力学（CFD）模型生成的缩放和归一化数据库恢复边界条件作为反向模拟。在CFD模型中，分别采用离散坐标法（DOM）和有限差分法（FDM）求解了辐射传递方程（RTE）和涡量方程（vorticity equation）的无量次形式。根据测试数据的平均均方根误差（RMSE），评估了训练数据库大小、隐藏层和每层神经元数量对直接和反向模拟中FNN结果准确性的影响。在直接模拟中，使用更小的CFD数据库和更多的隐藏层和神经元，可以获得与使用更大的CFD数据库和更简单的FNN训练的FNN相当的精度。此外，在反向模拟中，FNN模型被训练成使用温度剖面的子域来模拟或恢复边界条件，研究了子域的大小对RMSE精度的影响。结果表明，FNN方法可以进行常规CFD建模方法无法实现的逆模拟。结果表明，利用温度剖面的子域可以精确地恢复边界条件，覆盖主域的60%左右。

{"title":"Direct and inverse simulations of hydrodynamic and thermal characteristics in a room with random boundary conditions by feedforward neural network modelling","authors":"Mohammad Foruzan Nia, Eric Hu, Mergen H. Ghayesh","doi":"10.1016/j.enbenv.2024.08.005","DOIUrl":"10.1016/j.enbenv.2024.08.005","url":null,"abstract":"<div><div>Artificial Intelligence (AI) or Neural Network (NN) approaches are starting to be used in built environment areas. This study demonstrates that feedforward neural network (FNN) modelling is capable of simulating the hydrodynamic and thermal characteristics of a room with a radiant heating and cooling system. The FNN model was trained and tested to simulate air velocity and temperature profiles based on boundary conditions as direct simulation and to restore boundary conditions as inverse simulation, using a scaled and normalised database generated by a Computational Fluid Dynamics (CFD) model. In the CFD model, the non-dimensional form of the governing equations, including the radiative transfer equation (RTE) and vorticity equation, were solved using the discrete ordinate method (DOM) and finite difference method (FDM) respectively. The impacts of training database size, hidden layers, and the number of neurons in each layer on the accuracy of the FNN results in the direct and inverse simulations were evaluated in terms of the average root mean square error (RMSE) over the testing data. In the direct simulation, using a smaller CFD database with more hidden layers and neurons achieved comparable accuracy to an FNN trained with a larger CFD database and a less complex FNN. Furthermore, in the inverse simulation, where the FNN model was trained to use a subdomain of temperature profiles to simulate or restore the boundary conditions, the effect of the size of the subdomain on the accuracy in terms of RMSE was studied. It demonstrated that the FNN approach could conduct inverse simulations that are typically beyond the capability of conventional CFD modelling approaches. The results show that the boundary conditions could be accurately restored using subdomains of the temperature profile, covering approximately 60% of the main domain.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 163-176"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Conceptualizing sustainable occupant behaviour in offices from an interdisciplinary point of view: A systematic review 从跨学科的角度概念化办公室中可持续居住者的行为：系统回顾

Q1 Engineering

Energy and Built Environment

Pub Date : 2026-02-01 DOI: 10.1016/j.enbenv.2024.08.004

Han Li, Rianne Appel-Meulenbroek, Theo A. Arentze, Pieter-Jan Hoes

Occupant Behaviour (OB) has been identified as one of the most influential factors that impact workplace space usage. In addition, it proven to be one of the key reasons for discrepancies between predicted and measured energy consumption of office buildings. The current interdisciplinary understanding of OB is hardly conducive to an exhaustive conclusion, with many premises and veiled explanations made during the research, design, and management process. This paper aims to review the existing literature that focuses on energy-related workplace OB from Social and Behavioural science and from Engineering science for two reasons. Firstly, to identify the theory, connotation, and application of occupant behaviour in both fields. Secondly, to identify the type of behaviour, triggers of behaviour, and theoretical support for defining the term “Sustainable Occupant Behaviour in Offices (SOBO)”. This review used the PRISMA approach with the addition of snowball papers. The demonstrated results cover three main findings: 1. The four types of OB relevant in workplaces are occupancy, adaptive behaviour, non-adaptive behaviour, and personal adaptive behaviour. 2. Building, environmental, contextual, and personal factors were the four types of influential factors for SOBO. 3. Current theoretical frameworks for SOBO are mainly based on the Theory of planned behaviour (TPB), the norm-activation model (NAM) and/or the motivation, opportunity and ability (MOA) model. Findings are important for knowledge exchange and synergy processes between both disciplines in future studies.

居住者行为（OB）已被确定为影响工作空间使用的最具影响力的因素之一。此外，它被证明是预测和测量办公楼能耗差异的主要原因之一。目前对OB的跨学科理解很难得出详尽的结论，在研究、设计和管理过程中有许多前提和隐晦的解释。本文旨在回顾现有的文献，从社会和行为科学和工程科学的角度关注与能源相关的工作场所OB，原因有两个。首先，对这两个领域的居住者行为的理论、内涵和应用进行了界定。其次，找出行为的类型、行为的诱因，以及界定“可持续办公室占用人行为”的理论依据。本综述采用了PRISMA方法，并添加了雪球论文。演示结果包括三个主要发现：1。与工作场所相关的四种OB类型是占用、适应行为、非适应行为和个人适应行为。2. 建筑因素、环境因素、情境因素和个人因素是SOBO的四种影响因素。3. 目前的SOBO理论框架主要基于计划行为理论（TPB）、规范激活模型（NAM）和/或动机、机会和能力模型（MOA）。这些发现对未来研究中两个学科之间的知识交流和协同过程具有重要意义。

{"title":"Conceptualizing sustainable occupant behaviour in offices from an interdisciplinary point of view: A systematic review","authors":"Han Li, Rianne Appel-Meulenbroek, Theo A. Arentze, Pieter-Jan Hoes","doi":"10.1016/j.enbenv.2024.08.004","DOIUrl":"10.1016/j.enbenv.2024.08.004","url":null,"abstract":"<div><div>Occupant Behaviour (OB) has been identified as one of the most influential factors that impact workplace space usage. In addition, it proven to be one of the key reasons for discrepancies between predicted and measured energy consumption of office buildings. The current interdisciplinary understanding of OB is hardly conducive to an exhaustive conclusion, with many premises and veiled explanations made during the research, design, and management process. This paper aims to review the existing literature that focuses on energy-related workplace OB from Social and Behavioural science and from Engineering science for two reasons. Firstly, to identify the theory, connotation, and application of occupant behaviour in both fields. Secondly, to identify the type of behaviour, triggers of behaviour, and theoretical support for defining the term “Sustainable Occupant Behaviour in Offices (SOBO)”. This review used the PRISMA approach with the addition of snowball papers. The demonstrated results cover three main findings: 1. The four types of OB relevant in workplaces are occupancy, adaptive behaviour, non-adaptive behaviour, and personal adaptive behaviour. 2. Building, environmental, contextual, and personal factors were the four types of influential factors for SOBO. 3. Current theoretical frameworks for SOBO are mainly based on the Theory of planned behaviour (TPB), the norm-activation model (NAM) and/or the motivation, opportunity and ability (MOA) model. Findings are important for knowledge exchange and synergy processes between both disciplines in future studies.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 66-81"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of initial temperature and relative humidity on VHP penetration during HEPA in-situ fumigation disinfection 初始温度和相对湿度对HEPA原位熏蒸消毒过程中VHP渗透的影响

Q1 Engineering

Energy and Built Environment

Pub Date : 2026-02-01 DOI: 10.1016/j.enbenv.2024.08.003

Ye Yuan, Jiajing Sui, Xiangfei Kong

The high efficiency particulate air filter (HEPA) in exhaust system of high-level biosafety laboratory must be disinfected to kill harmful microorganisms before being replaced or tested. In-situ fumigation by vaporized hydrogen peroxide (VHP) is the most commonly used disinfection method for HEPA unit. The disinfection effect of HEPA unit is affected by the internal environment, but the influence of initial internal environment on VHP penetration during the fumigation process is still rarely studied. In this paper, a numerical model was established based on a physical HEPA box unit and field measurement. According to the simulated VHP flow field during in-situ fumigation process, the influence of initial internal temperature and relative humidity on the VHP penetration effect in HEPA was discussed with the indicators of penetration rate and velocity distribution. The results showed that the VHP concentration in the upstream section of HEPA was relatively uniform, while the maximum and minimum concentrations in the downstream section showed great difference and located at the top and bottom, respectively. The distributions of VHP penetration and upstream velocity were both vertically uneven. The VHP penetration rates in the middle of HEPA remained around 73 %. The initial temperature of 32 °C or 36 °C, or the initial relative humidity of 18 % were the suitable initial internal environment for HEPA in-situ fumigation, which could keep the VHP penetration rates of the upper and lower parts of HEPA at about 76 % and 61 %, respectively. In the suitable initial environment, the penetration and disinfection effect could be promoted by appropriately extending the rapid injection duration. This study provides a reference for optimizing the initial environment setting of HEPA in-situ fumigation.

高级别生物安全实验室排风系统中的高效微粒空气过滤器（HEPA）在更换或检测前必须进行消毒，以杀死有害微生物。汽化过氧化氢原位熏蒸（VHP）是HEPA装置最常用的消毒方法。HEPA装置的消毒效果受内部环境的影响，但熏蒸过程中初始内部环境对VHP渗透的影响研究尚少。本文基于物理高效微粒微粒箱单元和现场实测，建立了数值模型。根据原位熏蒸过程中模拟的VHP流场，以渗透速率和速度分布为指标，讨论了初始内部温度和相对湿度对HEPA中VHP渗透效果的影响。结果表明，HEPA上游断面的VHP浓度较为均匀，而下游断面的最大和最小浓度差异较大，分别位于顶部和底部。高压侵彻和上游速度的垂直分布均不均匀。HEPA中期的VHP渗透率保持在73%左右。初始温度为32℃或36℃，初始相对湿度为18%，可使HEPA上部和下部的VHP渗透率分别保持在76%和61%左右。在适宜的初始环境下，适当延长快速注射时间可促进渗透和消毒效果。本研究为优化HEPA原位熏蒸初始环境设置提供了参考。

{"title":"Effect of initial temperature and relative humidity on VHP penetration during HEPA in-situ fumigation disinfection","authors":"Ye Yuan, Jiajing Sui, Xiangfei Kong","doi":"10.1016/j.enbenv.2024.08.003","DOIUrl":"10.1016/j.enbenv.2024.08.003","url":null,"abstract":"<div><div>The high efficiency particulate air filter (HEPA) in exhaust system of high-level biosafety laboratory must be disinfected to kill harmful microorganisms before being replaced or tested. In-situ fumigation by vaporized hydrogen peroxide (VHP) is the most commonly used disinfection method for HEPA unit. The disinfection effect of HEPA unit is affected by the internal environment, but the influence of initial internal environment on VHP penetration during the fumigation process is still rarely studied. In this paper, a numerical model was established based on a physical HEPA box unit and field measurement. According to the simulated VHP flow field during in-situ fumigation process, the influence of initial internal temperature and relative humidity on the VHP penetration effect in HEPA was discussed with the indicators of penetration rate and velocity distribution. The results showed that the VHP concentration in the upstream section of HEPA was relatively uniform, while the maximum and minimum concentrations in the downstream section showed great difference and located at the top and bottom, respectively. The distributions of VHP penetration and upstream velocity were both vertically uneven. The VHP penetration rates in the middle of HEPA remained around 73 %. The initial temperature of 32 °C or 36 °C, or the initial relative humidity of 18 % were the suitable initial internal environment for HEPA in-situ fumigation, which could keep the VHP penetration rates of the upper and lower parts of HEPA at about 76 % and 61 %, respectively. In the suitable initial environment, the penetration and disinfection effect could be promoted by appropriately extending the rapid injection duration. This study provides a reference for optimizing the initial environment setting of HEPA in-situ fumigation.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 1-13"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on dynamic heat transfer characteristics and fin geometric parameters in latent heat storage system with vertical tubes and longitudinal fins 竖管纵翅潜热蓄热系统动态传热特性及翅片几何参数研究

Q1 Engineering

Energy and Built Environment

Pub Date : 2026-02-01 DOI: 10.1016/j.enbenv.2024.08.007

Shengtao Ou, Ping Wang, Huan Su, Xiao Chen, Ye Yang

Latent heat storage plays an important role in the utilization of solar energy. However, the low thermal conductivity of phase change materials (PCM) significantly reduces the heat transfer efficiency of latent heat storage systems. To enhance its storage/release efficiency, optimizing the fin geometry is essential. This paper establishes a validated three-dimensional numerical model that considers PCM natural convection to study the effects of fin height and number on the heat transfer process. The fin volume of all models is kept constant, and the fin height is determined by the annular space. The impact of fin heights (0.3ΔR, 0.5ΔR, 0.7ΔR, 0.9ΔR) and numbers (4, 8, 10, 16) on heat transfer efficiency was investigated by analyzing the PCM temperature distribution on the shell section, the liquid fraction within the shell over time, and the average heat transfer rate and heat flux. The results show that increasing the fin height from 0.3ΔR to 0.9ΔR reduces the heat storage and release completion times by 61.16 % and 45.43 %, respectively. Similarly, increasing the number of fins from 4 to 16 reduces the heat storage and release completion times by 33.35 % and 31.13 %, respectively. The study concludes that increasing both the fin number and height dilutes the heat flux between the fin and PCM during both the heat storage and release processes, with the fin number having a more significant effect on reducing heat flux than fin height. Therefore, when the fin volume remains constant, increasing fin height is more conducive to improving the heat transfer performance of the PCM. These findings will provide a foundation for the application of finned tube energy storage systems in building energy conservation and other fields.

潜热储存在太阳能利用中起着重要的作用。然而，相变材料（PCM）的低导热系数显著降低了潜热储热系统的传热效率。为了提高其储存/释放效率，优化翅片的几何形状是必不可少的。本文建立了考虑PCM自然对流的经过验证的三维数值模型，研究了翅片高度和翅片数量对换热过程的影响。所有型号的翅片体积保持不变，翅片高度由环形空间决定。通过分析壳截面上的PCM温度分布、壳内液率随时间的变化以及平均换热率和热流密度，研究了翅片高度（0.3ΔR, 0.5ΔR, 0.7ΔR, 0.9ΔR）和翅片数量（4,8,10,16）对换热效率的影响。结果表明：当翅片高度从0.3ΔR增加到0.9ΔR时，储热完成次数和放热完成次数分别减少61.16%和45.43%；同样，将翅片的数量从4个增加到16个，可以分别减少33.35%和31.13%的储热和释放完成时间。研究结果表明，增加翅片数和翅片高度均能稀释储热和放热过程中翅片与PCM之间的热流密度，且翅片数对热流密度的降低作用比增加翅片高度更为显著。因此，在翅片体积一定的情况下，增加翅片高度更有利于提高PCM的换热性能。这些研究结果将为翅片管储能系统在建筑节能等领域的应用提供基础。

{"title":"Investigation on dynamic heat transfer characteristics and fin geometric parameters in latent heat storage system with vertical tubes and longitudinal fins","authors":"Shengtao Ou, Ping Wang, Huan Su, Xiao Chen, Ye Yang","doi":"10.1016/j.enbenv.2024.08.007","DOIUrl":"10.1016/j.enbenv.2024.08.007","url":null,"abstract":"<div><div>Latent heat storage plays an important role in the utilization of solar energy. However, the low thermal conductivity of phase change materials (PCM) significantly reduces the heat transfer efficiency of latent heat storage systems. To enhance its storage/release efficiency, optimizing the fin geometry is essential. This paper establishes a validated three-dimensional numerical model that considers PCM natural convection to study the effects of fin height and number on the heat transfer process. The fin volume of all models is kept constant, and the fin height is determined by the annular space. The impact of fin heights (0.3<em>ΔR</em>, 0.5<em>ΔR</em>, 0.7<em>ΔR</em>, 0.9<em>ΔR</em>) and numbers (4, 8, 10, 16) on heat transfer efficiency was investigated by analyzing the PCM temperature distribution on the shell section, the liquid fraction within the shell over time, and the average heat transfer rate and heat flux. The results show that increasing the fin height from 0.3<em>ΔR</em> to 0.9<em>ΔR</em> reduces the heat storage and release completion times by 61.16 % and 45.43 %, respectively. Similarly, increasing the number of fins from 4 to 16 reduces the heat storage and release completion times by 33.35 % and 31.13 %, respectively. The study concludes that increasing both the fin number and height dilutes the heat flux between the fin and PCM during both the heat storage and release processes, with the fin number having a more significant effect on reducing heat flux than fin height. Therefore, when the fin volume remains constant, increasing fin height is more conducive to improving the heat transfer performance of the PCM. These findings will provide a foundation for the application of finned tube energy storage systems in building energy conservation and other fields.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 177-190"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sorption kinetics of vermiculite-K2CO3 in thermochemical energy storage: Model evaluation and mechanism exploration 蛭石-K2CO3 在热化学储能中的吸附动力学：模型评估与机制探索

Q1 Engineering

Energy and Built Environment

Pub Date : 2026-02-01 DOI: 10.1016/j.enbenv.2024.07.005

Jianquan Lin , Qian Zhao , Yimin Xiao , Haotian Huang

Thermal energy storage technology is crucial for building heating and domestic hot water supply, playing an essential role in optimizing energy utilization. Hydrated salts have emerged as prominent materials for thermochemical energy storage (TCES), with their sorption kinetics directly impacting thermal energy conversion efficiency. This study experimentally analyzes the microstructure and sorption performance of the EV/K₂CO₃ composite sorbent. Numerical analysis methods are employed to evaluate the validity of various sorption kinetics models and to elucidate the sorption mechanism and potential limitations of the composite sorbent. The findings indicate that EV can disperse K₂CO₃ salt particles while preserving a porous structure, thereby improving the sorption kinetics efficiency and stability of the EV/K₂CO₃ composite sorbent. At low relative pressure, EV/K₂CO₃ demonstrates a chemical adsorption mechanism, with nucleation models accurately predicting its sorption behavior, primarily limited by the nucleation and growth of hydrated salt crystals. At moderate relative pressure, EV/K₂CO₃ exhibits a mechanism involving both chemical adsorption and solution absorption, with diffusion models and the first-order model showing higher prediction accuracy, primarily limited by diffusion within or outside the product layer. At high relative pressure, EV/K₂CO₃ primarily undergoes solution absorption, with geometric contraction models and the first-order model displaying good predictive performance, primarily limited by the reaction phase interface. This study enhances comprehension of the sorption mechanism of the EV/K₂CO₃ composite, providing a scientific foundation for the development of high-performance TCES materials suitable for building and environmental applications.

蓄热技术是建筑供暖和生活热水供应的关键技术，在优化能源利用方面发挥着重要作用。水合盐已成为热化学储能（TCES）的重要材料，其吸附动力学直接影响热能转换效率。实验分析了EV/K2CO3复合吸附剂的微观结构和吸附性能。采用数值分析方法评价了各种吸附动力学模型的有效性，阐明了复合吸附剂的吸附机理和潜在局限性。研究结果表明，EV可以分散K2CO3盐颗粒，同时保持其多孔结构，从而提高了EV/K2CO3复合吸附剂的吸附动力学效率和稳定性。在低相对压力下，EV/K2CO3表现出化学吸附机制，成核模型可以准确预测其吸附行为，但主要受水合盐晶体成核和生长的限制。在中等相对压力下，EV/K2CO3表现出化学吸附和溶液吸收双重机制，扩散模型和一阶模型预测精度较高，主要受产物层内外扩散的限制。在高相对压力下，EV/K2CO3主要发生溶液吸收，几何收缩模型和一阶模型预测效果较好，主要受反应相界面的限制。本研究加深了对EV/K2CO3复合材料吸附机理的理解，为开发适用于建筑和环境应用的高性能TCES材料提供了科学依据。

{"title":"Sorption kinetics of vermiculite-K2CO3 in thermochemical energy storage: Model evaluation and mechanism exploration","authors":"Jianquan Lin , Qian Zhao , Yimin Xiao , Haotian Huang","doi":"10.1016/j.enbenv.2024.07.005","DOIUrl":"10.1016/j.enbenv.2024.07.005","url":null,"abstract":"<div><div>Thermal energy storage technology is crucial for building heating and domestic hot water supply, playing an essential role in optimizing energy utilization. Hydrated salts have emerged as prominent materials for thermochemical energy storage (TCES), with their sorption kinetics directly impacting thermal energy conversion efficiency. This study experimentally analyzes the microstructure and sorption performance of the EV/K<sub>2</sub>CO<sub>3</sub> composite sorbent. Numerical analysis methods are employed to evaluate the validity of various sorption kinetics models and to elucidate the sorption mechanism and potential limitations of the composite sorbent. The findings indicate that EV can disperse K<sub>2</sub>CO<sub>3</sub> salt particles while preserving a porous structure, thereby improving the sorption kinetics efficiency and stability of the EV/K<sub>2</sub>CO<sub>3</sub> composite sorbent. At low relative pressure, EV/K<sub>2</sub>CO<sub>3</sub> demonstrates a chemical adsorption mechanism, with nucleation models accurately predicting its sorption behavior, primarily limited by the nucleation and growth of hydrated salt crystals. At moderate relative pressure, EV/K<sub>2</sub>CO<sub>3</sub> exhibits a mechanism involving both chemical adsorption and solution absorption, with diffusion models and the first-order model showing higher prediction accuracy, primarily limited by diffusion within or outside the product layer. At high relative pressure, EV/K<sub>2</sub>CO<sub>3</sub> primarily undergoes solution absorption, with geometric contraction models and the first-order model displaying good predictive performance, primarily limited by the reaction phase interface. This study enhances comprehension of the sorption mechanism of the EV/K<sub>2</sub>CO<sub>3</sub> composite, providing a scientific foundation for the development of high-performance TCES materials suitable for building and environmental applications.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 41-53"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141713486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of double-PCM based PV composite wall for power-generation and building insulation: Thermal characteristics and energy consumption prediction 基于双pcm的光伏发电与建筑保温复合墙体研究：热特性与能耗预测

Q1 Engineering

Energy and Built Environment

Pub Date : 2026-02-01 DOI: 10.1016/j.enbenv.2024.08.002

Yang Cai , Yingxi Huang , Zhengyu Shu , Ziquan Liu , Huaiyu Zhong , Fuyun Zhao

The integration of phase change material (PCM) with building-integrated photovoltaic (BIPV) presents a compelling approach to enhance solar energy utilization and mitigate indoor thermal loads, contributing to energy-efficient and low-carbon building development. Traditional BIPV-PCM structures, however, struggle to balance PV efficiency and thermal insulation, particularly with varying PCM wall positions. To address this situation, this study introduces a novel double-PCM BIPV composite envelope (BIPV-dPCM). An experimentally validated dynamic heat transfer model was developed and used to perform a comparative simulation analysis with three reference systems to quantify the energy-saving potential of the BIPV-dPCM, focusing on PV output and wall insulation effectiveness metrics. Further dimensionless parametric analysis were carried out to investigate the systematic performance of the two PCMs at different relativities. In addition, the coupled working mechanism of the BIPV-dPCM system concerning the power generation performance and thermal insulation performance under transient variations is explored. It was found that the BIPV-dPCM showcases superior thermoelectric coupling performance compared to three alternative enclosures. Incorporating two PCMs significantly enhances electrical exergy efficiency by 11.66 % and thermal exergy efficiency by 1.54 %, surpassing other reference systems. The increase in PCM latent heat ratio has a limited effect on performance gain. Notably, as the PCM thickness ratio exceeds 1, the decline in P value decelerates, for every 0.5 increment in the g, the P value diminishes by merely 0.2 %. The ideal h is identified between 1 and 1.5, with 1.5 being optimal for energy conservation objectives. Additionally, the self-sufficiency coefficient (SSC) of the BIPV-dPCM remains robust, sustaining a range of 55 % to 65 % over prolonged periods. This study offers novel perspectives and serves as a design reference for optimizing building energy systems and enhancing cooling efficiencies in subtropical climates.

相变材料（PCM）与建筑集成光伏（BIPV）的结合为提高太阳能利用率和减轻室内热负荷提供了一种引人注目的方法，有助于节能和低碳建筑的发展。然而，传统的BIPV-PCM结构很难平衡PV效率和隔热性，特别是不同的PCM壁位置。为了解决这一问题，本研究引入了一种新型的双pcm BIPV复合包膜（BIPV- dpcm）。建立了一个经过实验验证的动态传热模型，并与三个参考系统进行了对比仿真分析，以量化BIPV-dPCM的节能潜力，重点关注光伏输出和墙体保温效果指标。进一步进行了无量纲参数分析，考察了两种PCMs在不同相对关系下的系统性能。此外，还探讨了瞬态变化下BIPV-dPCM系统发电性能与保温性能耦合的工作机理。研究发现，与三种替代外壳相比，BIPV-dPCM展示了优越的热电耦合性能。结合两个pcm显著提高电用能效率11.66%和热用能效率1.54%，超过其他参考系统。PCM潜热比的增加对性能增益的影响有限。值得注意的是，当PCM厚度比超过1时，P值的下降速度减慢，g每增加0.5，P值仅减少0.2%。理想的h介于1和1.5之间，1.5是节能目标的最佳值。此外，BIPV-dPCM的自给自足系数（SSC）保持强劲，在较长时间内保持在55%至65%的范围内。该研究为优化亚热带气候下的建筑能源系统和提高制冷效率提供了新的视角和设计参考。

{"title":"Investigation of double-PCM based PV composite wall for power-generation and building insulation: Thermal characteristics and energy consumption prediction","authors":"Yang Cai , Yingxi Huang , Zhengyu Shu , Ziquan Liu , Huaiyu Zhong , Fuyun Zhao","doi":"10.1016/j.enbenv.2024.08.002","DOIUrl":"10.1016/j.enbenv.2024.08.002","url":null,"abstract":"<div><div>The integration of phase change material (PCM) with building-integrated photovoltaic (BIPV) presents a compelling approach to enhance solar energy utilization and mitigate indoor thermal loads, contributing to energy-efficient and low-carbon building development. Traditional BIPV-PCM structures, however, struggle to balance PV efficiency and thermal insulation, particularly with varying PCM wall positions. To address this situation, this study introduces a novel double-PCM BIPV composite envelope (BIPV-dPCM). An experimentally validated dynamic heat transfer model was developed and used to perform a comparative simulation analysis with three reference systems to quantify the energy-saving potential of the BIPV-dPCM, focusing on PV output and wall insulation effectiveness metrics. Further dimensionless parametric analysis were carried out to investigate the systematic performance of the two PCMs at different relativities. In addition, the coupled working mechanism of the BIPV-dPCM system concerning the power generation performance and thermal insulation performance under transient variations is explored. It was found that the BIPV-dPCM showcases superior thermoelectric coupling performance compared to three alternative enclosures. Incorporating two PCMs significantly enhances electrical exergy efficiency by 11.66 % and thermal exergy efficiency by 1.54 %, surpassing other reference systems. The increase in PCM latent heat ratio has a limited effect on performance gain. Notably, as the PCM thickness ratio exceeds 1, the decline in <em>P</em> value decelerates, for every 0.5 increment in the <em>g</em>, the <em>P</em> value diminishes by merely 0.2 %. The ideal <em>h</em> is identified between 1 and 1.5, with 1.5 being optimal for energy conservation objectives. Additionally, the self-sufficiency coefficient (<em>SSC</em>) of the BIPV-dPCM remains robust, sustaining a range of 55 % to 65 % over prolonged periods. This study offers novel perspectives and serves as a design reference for optimizing building energy systems and enhancing cooling efficiencies in subtropical climates.</div></div>","PeriodicalId":33659,"journal":{"name":"Energy and Built Environment","volume":"7 1","pages":"Pages 14-27"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0