Renewable Energy最新文献_第7页

Influence mechanism on thermoelectric and refrigerating performance of PVT composite cycle system with collaborative compressor-refrigerant pump drive 压缩机-冷媒泵协同驱动PVT复合循环系统热电制冷性能的影响机理

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-02 DOI: 10.1016/j.renene.2026.125350

Xiaochao Guo , Yiping Wu , Boyuan Wang , Qingpeng Wei

The lack of clarity regarding the quantitative influence mechanisms poses a significant challenge to the optimized design and reliable application of the novel PVT composite cycle system with collaborative compressor-refrigerant pump drive in different regions. Therefore, a simulation platform was established to investigate the mechanism that influences the thermoelectric and refrigerating performance of the novel system. The research indicates that for every 1.0 °C increase in ambient temperature, the heating COP rises by 1.5 %, 5.0 %, and 5.0 % for the PVT heat pump, PVT composite cycle, and PVT power heat pipe cogeneration modes, respectively, while the exergy efficiency decreases by 0.5 % across all modes; with every 10 W/m² increase in solar irradiance, the heating COP increases by 1.5 %, 3.0 %, and 2.0 % for the previously mentioned three cogeneration modes, respectively, and the exergy efficiency sees a 0.1 % increase across all modes. Moreover, with each 1.0 °C rise in ambient temperature, the refrigerating capacity and refrigerating COP decrease by 1.5 % and 2.5 %, respectively; for each 1 m/s escalation in wind speed, the refrigerating capacity and refrigerating COP are enhanced by 3.0 % and 5.0 %, respectively. The heating COP and exergy efficiency of the proposed system are, respectively, 10.0 %–575 % and 5.0 %–25.0 % superior to those of the existing PVT heat pump system. Furthermore, the additional investment relative to the existing PVT heat pump system is projected to be recouped within a span of 0.6–2.0 years. These findings provide a crucial theoretical framework and definitive performance benchmarks for the optimized design and application of this novel system across diverse climatic regions.

由于定量影响机理的不明确，对压缩机-制冷剂泵协同驱动新型PVT复合循环系统在不同区域的优化设计和可靠应用提出了重大挑战。为此，建立了仿真平台，研究了影响该系统热电制冷性能的机理。研究表明，环境温度每升高1.0℃，PVT热泵、PVT复合循环和PVT动力热管热电联产模式的供热COP分别上升1.5%、5.0%和5.0%，而所有模式的火用效率均下降0.5%；对于前面提到的三种热电联产模式，太阳辐照度每增加10 W/m2，加热COP分别增加1.5%，3.0%和2.0%，所有模式的能源效率都增加0.1%。环境温度每升高1.0℃，制冷量和制冷COP分别降低1.5%和2.5%；风速每增加1 m/s，制冷量和制冷COP分别提高3.0%和5.0%。与现有PVT热泵系统相比，该系统的供热COP和火用效率分别提高10.0% ~ 575%和5.0% ~ 25.0%。此外，相对于现有PVT热泵系统的额外投资预计将在0.6-2.0年的时间内收回。这些发现为这种新型系统在不同气候区域的优化设计和应用提供了重要的理论框架和明确的性能基准。

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引用次数: 0

Brazilian bioenergy generation from cattle and pig manure: An economic life cycle assessment 巴西利用牛粪和猪粪生产生物能源：经济生命周期评估

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-01-27 DOI: 10.1016/j.renene.2026.125345

Ana María Naranjo Herrera , Elisa Maria Mano Esteves , Mohammad Mansouri , Peter Breuhaus , Cláudia do Rosário Vaz Morgado

Renewable energy from biogas derived from agricultural waste offers strong potential for sustainable rural development in Brazil. This study conducts the first comparative economic life cycle assessment (E-LCA) of 1 kWh of electricity generated from cattle and pig manure in small-scale systems in the Brazilian Midwest. Following ISO 14040 and 14044 standards, the analysis covered goal and scope definition, inventory, impact assessment, and interpretation, to provide robust insights for managers and policymakers. Eight scenarios were compared, integrating digestate use and two electricity generation models with covered lagoon biodigester technology. Results showed that pig manure scenarios are more economically viable, achieving generation costs as low as US$0.01/kWh, while cattle manure reached US$0.09/kWh. Distributed generation models were up to 38.5 % more profitable than individual systems. Moreover, including a secondary lagoon and using digestate as biofertilizer increased the internal rate of return by up to 80 %. These findings underline the urgent need for policies to foster energy transition and carbon reduction in Brazil, especially in rural and agro-industrial sectors still dependent on conventional energy sources. Promoting small-scale biogas adoption is a crucial step toward achieving Brazil's climate goals and its Paris Agreement commitments.

从农业废弃物中提取的沼气可再生能源为巴西农村可持续发展提供了巨大潜力。本研究在巴西中西部的小规模系统中对牛和猪粪产生的1千瓦时电力进行了首次比较经济生命周期评估（E-LCA）。该分析遵循ISO 14040和14044标准，涵盖了目标和范围定义、清单、影响评估和解释，为管理者和决策者提供了强有力的见解。采用覆盖式泻湖沼池技术综合利用沼池和两种发电模式，对8种方案进行了比较。结果表明，猪粪方案在经济上更可行，发电成本低至0.01美元/千瓦时，而牛粪方案的发电成本为0.09美元/千瓦时。分布式发电模式比单个系统的利润高出38.5%。此外，包括一个二级泻湖和使用消化作为生物肥料增加了内部回报率高达80%。这些发现强调了巴西迫切需要制定政策来促进能源转型和碳减排，特别是在仍然依赖传统能源的农村和农业工业部门。推广小规模沼气应用是巴西实现气候目标和巴黎协定承诺的关键一步。

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引用次数: 0

Performance analysis of PV-BESS-ASHP-LTRTs system based on experimental study in a cold-climate residential building 基于低温居住建筑试验研究的PV-BESS-ASHP-LTRTs系统性能分析

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-05 DOI: 10.1016/j.renene.2026.125382

Xinyin Xu , Liu Yang , Yuhao Qiao , Changyin Xiang , Liuyangzi Chen , Yan Liu

Traditional solar thermal systems with water as the working fluid are prone to both freezing and overheating, which impose operational challenges in cold regions. A solar-assisted heat pump integrating battery storage and radiant terminal energy system is proposed to meet the demands in well-insulated residential buildings. The heat pump converts the power generated by photovoltaic arrays into heat and further store in batteries and the building envelope. A test-bed in Shaanxi, China is employed to conduct full-time, 12-h, solar-based, and shutdown experiments, enabling a performance analysis of the operational characteristics and the building's thermal response. This study also develops a theoretical model for the proposed system and validates it using the measured data. Field experimental results show that the proposed system operates stably under cold-climate conditions. PV generation reaches 18.10 kWh/day and the high solar contribution is up to 83.0%. The system maintains indoor air temperature of seven rooms within 16.1-26.4 °C, even with 60 h of downtime, while the PMV values mostly fall within the Class I and Class II thermal comfort zones. Furthermore, the proposed system achieves the lowest carbon emissions among the compared energy systems. This verifies that the proposed system has significant research and application potential.

传统的以水为工作流体的太阳能热系统容易冻结和过热，这给寒冷地区的操作带来了挑战。提出了一种集电池蓄热和终端辐射能于一体的太阳能辅助热泵系统，以满足良好隔热住宅的需求。热泵将光伏阵列产生的能量转化为热量，并进一步储存在电池和建筑围护结构中。中国陕西的一个试验台被用来进行全天、12小时、基于太阳能和关闭的实验，从而能够对运行特性和建筑物的热响应进行性能分析。本研究还为所提出的系统建立了理论模型，并使用实测数据对其进行了验证。现场试验结果表明，该系统在寒冷气候条件下运行稳定。光伏发电达到18.10千瓦时/天，高太阳能贡献率达83.0%。系统在停机60 h的情况下，仍能将7个房间的室内温度保持在16.1 ~ 26.4℃，PMV值大多处于I类和II类热舒适区。此外，所提出的系统在比较的能源系统中实现了最低的碳排放。验证了该系统具有重要的研究和应用潜力。

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引用次数: 0

Balancing biofuel production and food security: The case of OECD countries 平衡生物燃料生产和粮食安全：以经合组织国家为例

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-01 DOI: 10.1016/j.renene.2026.125367

Hakan Eygu

By the United Nations' Sustainable Development Goals (SDGs), countries are actively addressing one of today's most pressing challenges: food security. Policies that promote the strengthening of agricultural economies raise significant questions regarding food security at both local and global scales. Researchers aim to reduce CO₂ emissions by emphasizing environmental protection and using renewable energy sources. However, the increase in CO₂ emissions leads to rising global temperatures, negatively impacting human life, biodiversity, land quality, and water resources essential for overall food security. This study contributes to the literature by examining the impacts of biodiesel production, petroleum production, and their socio-economic effects on food security. In this context, the study aligns with the SDG 2 (Zero Hunger), SDG 12 (Responsible Consumption and Production), and SDG 15 (Life on Land) goals of OECD countries. In the study, the CS-ARDL method, which accounts for cross-sectional dependence, endogeneity, and heterogeneity, was employed. The empirical analysis results reveal that biofuel production has a negative impact on food security in OECD economies. Additionally, it has been determined that certain variables, such as petroleum production, also have negative effects on food security. The findings highlight the critical importance of understanding how biofuel production impacts food security in OECD countries. Policymakers should consider food security while promoting biofuel programs and implement policies aimed at protecting people.

根据联合国的可持续发展目标（sdg），各国正在积极应对当今最紧迫的挑战之一：粮食安全。促进加强农业经济的政策在地方和全球范围内提出了有关粮食安全的重大问题。研究人员的目标是通过强调环境保护和使用可再生能源来减少二氧化碳的排放。然而，二氧化碳排放量的增加导致全球气温上升，对人类生活、生物多样性、土地质量和对整体粮食安全至关重要的水资源产生负面影响。本研究通过考察生物柴油生产、石油生产的影响及其对粮食安全的社会经济影响，为文献做出了贡献。在此背景下，该研究符合经合组织国家的可持续发展目标2（零饥饿）、可持续发展目标12（负责任的消费和生产）和可持续发展目标15（陆地生命）目标。本研究采用了CS-ARDL方法，考虑了横截面依赖性、内生性和异质性。实证分析结果表明，生物燃料生产对经合组织经济体的粮食安全具有负面影响。此外，已确定某些变量，如石油生产，也对粮食安全产生消极影响。这些发现强调了理解生物燃料生产如何影响经合组织国家粮食安全的关键重要性。决策者应该在促进生物燃料项目和实施旨在保护人民的政策的同时考虑粮食安全问题。

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引用次数: 0

Exploring biogas and biofertilizer resource recovery potential from kitchen waste and fecal sludge in decentralized settings: the case of Dar es Salaam, Tanzania 探索分散环境下厨房垃圾和粪便污泥中沼气和生物肥料资源回收潜力：以坦桑尼亚达累斯萨拉姆为例

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-01-30 DOI: 10.1016/j.renene.2026.125356

Franella Francos Halla , Lise Appels , Jacob Mabula Kihila , Jo De Vrieze

Most peri-urban areas in sub-Saharan Africa and similar regions do not incorporate sustainable organic waste management towards integrated resource recovery. Here, we explored the potential of kitchen waste and fecal sludge for the production of biogas and biofertilizers through anaerobic digestion at Kizito Huonjwa Street, Kigamboni Municipality in Dar es Salaam, Tanzania. A questionnaire was carried out, combined with interactive interviews with key informants and focus group discussion. The biogas and biofertilizer production potential from kitchen waste and fecal sludge were analyzed in three scenarios, focusing on kitchen waste only, fecal sludge only, and their combination. The highest biogas yields were achieved from the co-digestion of kitchen waste and fecal sludge, related to the available estimated feedstock quantities. Biogas production could reduce energy costs by up to 2.07 USD.day⁻¹ for households currently relying on charcoal, and up to 0.79 USD.day⁻¹ for households using liquefied petroleum gas for cooking and heating. The produced biofertilizers could reduce fertilizer costs by up to 72.6 % by replacing the currently used synthetic fertilizers. Overall, kitchen waste and fecal sludge offer great potential in bio-energy recovery and biofertilizer production, and decentralized resource recovery approaches in sub-Saharan Africa could be both sustainable and economically feasible.

撒哈拉以南非洲和类似区域的大多数城郊地区没有将可持续有机废物管理纳入综合资源回收。在这里，我们探索了在坦桑尼亚达累斯萨拉姆基甘博尼市Kizito Huonjwa街通过厌氧消化生产沼气和生物肥料的厨房垃圾和粪便污泥的潜力。进行了一份问卷调查，结合与关键线人的互动访谈和焦点小组讨论。以餐厨垃圾、粪便污泥为研究对象，分别分析了餐厨垃圾、粪便污泥、餐厨垃圾和粪便污泥三种场景下的沼气和生物肥料生产潜力。与可用的估计原料数量有关，通过厨房垃圾和粪便污泥的共消化实现了最高的沼气产量。沼气生产可以减少高达2.07美元的能源成本。对于目前依赖木炭的家庭，最高可达0.79美元。使用液化石油气做饭和取暖的家庭为Day−1。所生产的生物肥料可以替代目前使用的合成肥料，减少高达72.6%的肥料成本。总的来说，厨房垃圾和粪便污泥在生物能源回收和生物肥料生产方面具有巨大潜力，在撒哈拉以南非洲，分散的资源回收方法既可持续又经济可行。

{"title":"Exploring biogas and biofertilizer resource recovery potential from kitchen waste and fecal sludge in decentralized settings: the case of Dar es Salaam, Tanzania","authors":"Franella Francos Halla , Lise Appels , Jacob Mabula Kihila , Jo De Vrieze","doi":"10.1016/j.renene.2026.125356","DOIUrl":"10.1016/j.renene.2026.125356","url":null,"abstract":"<div><div>Most peri-urban areas in sub-Saharan Africa and similar regions do not incorporate sustainable organic waste management towards integrated resource recovery. Here, we explored the potential of kitchen waste and fecal sludge for the production of biogas and biofertilizers through anaerobic digestion at Kizito Huonjwa Street, Kigamboni Municipality in Dar es Salaam, Tanzania. A questionnaire was carried out, combined with interactive interviews with key informants and focus group discussion. The biogas and biofertilizer production potential from kitchen waste and fecal sludge were analyzed in three scenarios, focusing on kitchen waste only, fecal sludge only, and their combination. The highest biogas yields were achieved from the co-digestion of kitchen waste and fecal sludge, related to the available estimated feedstock quantities. Biogas production could reduce energy costs by up to 2.07 USD.day<sup>−1</sup> for households currently relying on charcoal, and up to 0.79 USD.day<sup>−1</sup> for households using liquefied petroleum gas for cooking and heating. The produced biofertilizers could reduce fertilizer costs by up to 72.6 % by replacing the currently used synthetic fertilizers. Overall, kitchen waste and fecal sludge offer great potential in bio-energy recovery and biofertilizer production, and decentralized resource recovery approaches in sub-Saharan Africa could be both sustainable and economically feasible.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"262 ","pages":"Article 125356"},"PeriodicalIF":9.1,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrophobic-hydrophilic Janus anodic aluminum oxide membrane via physical deposition for enhanced interfacial water evaporation 疏亲水性Janus阳极氧化铝膜通过物理沉积增强界面水分蒸发

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-01-26 DOI: 10.1016/j.renene.2026.125337

Enyu Wang , Yanqing Li , Tao Sun , Jiaqi Zhang , Lanlan Wu , Shuiping Yan

Solar-driven interfacial evaporation of water has attracted an increasing attention for clean water production due to its energy efficiency and environmental friendliness. However, it still suffers from the relatively low water evaporation rate, generally due to the limited water transport capacity of conventional evaporators and challenges in fabricating the precisely controlled air-water interface. In this study, we developed a simple and scalable physical deposition method to fabricate two types of hydrophobic-hydrophilic Janus anodic aluminum oxide (AAO) membrane evaporators. The hydrophobically modified TiO₂ or carbon nanotube (CNT) were coated onto one surface of hydrophilic AAO membrane by using a polyvinylidene fluoride (PVDF) binder to achieve a hydrophobic membrane surface, while the other AAO membrane surface was still hydrophilic. Under heating-driven conditions, the TiO₂-coated Janus membrane with asymmetric water contact angles of 117.38 ± 5.83°/55.42 ± 4.35°achieved a high water evaporation rate of 1.31 kg/m²·h at 45 °C (bulk water temperature), which was 56.32 % higher than the natural evaporation. This increased water evaporate rate was mainly attributed to a system-level synergy between a rapid capillary-driven water transport through the nanochannels and an enhanced heat and mass transfer at the Janus interface, as evidenced by a reduction in intrinsic phase transition barrier driven by the Janus interface, resulting in a low apparent evaporation enthalpy of water with 1635 kJ/kg. Moreover, driven by solar energy, the CNT-coated Janus membrane (3.18 mg-CNT/cm² loading) exhibited an excellent water evaporation rate of 3.13 kg/m²·h under 1 sun illumination (1 kW/m²), which was 42.27 % higher than TiO₂-coated Janus membrane, demonstrating a superior photothermal conversion efficiency. Furthermore, the CNT-coated Janus AAO membrane evaporator was also successfully adopted to concentrate the dark biogas slurry featured with a strong solar absorption performance, a ∼4 % improvement in water evaporation efficiency and a high ammonia nitrogen rejection rate of ∼91 % were achieved when compared to the natural evaporation, confirming its practical potential for wastewater concentration and nutrient recovery.

太阳能驱动的界面蒸发水因其节能环保的特点，在清洁水生产领域受到越来越多的关注。然而，它仍然存在相对较低的水蒸发速率，这主要是由于传统蒸发器的输水能力有限，以及在制造精确控制的空气-水界面方面存在挑战。在本研究中，我们开发了一种简单且可扩展的物理沉积方法来制造两种亲疏水Janus阳极氧化铝（AAO）膜蒸发器。采用聚偏氟乙烯（PVDF）粘结剂将改性后的TiO2或碳纳米管（CNT）包覆在亲水性AAO膜的一个表面上，形成疏水膜表面，而另一个AAO膜表面仍为亲水性。在加热驱动条件下，非对称水接触角为117.38±5.83°/55.42±4.35°的tio2包覆Janus膜在45℃（体水温度）下的水分蒸发速率为1.31 kg/m2·h，比自然蒸发速率高56.32%。水蒸发速率的增加主要归因于毛细管驱动的水通过纳米通道的快速运输和Janus界面上的传热传质增强之间的系统级协同作用，正如Janus界面驱动的本征相变垒的减少所证明的那样，导致水的表观蒸发焓较低，为1635 kJ/kg。此外，在太阳能驱动下，cnt包覆Janus膜（负载3.18 mg-CNT/cm2）在1个太阳光照（1 kW/m2）下的水分蒸发速率为3.13 kg/m2·h，比tio2包覆Janus膜高出42.27%，显示出优越的光热转换效率。此外，采用碳纳米管包覆的Janus AAO膜蒸发器也成功地浓缩了深色沼液，该沼液具有较强的太阳能吸收性能，与自然蒸发相比，水蒸发效率提高了~ 4%，氨氮截除率高达~ 91%，证实了其在废水浓缩和养分回收方面的实用潜力。

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引用次数: 0

Achieving energy autonomy in smart farm systems through renewable thermal energy: A scenario-based environmental and economic assessment 通过可再生热能实现智能农场系统的能源自主：基于场景的环境和经济评估

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-03 DOI: 10.1016/j.renene.2026.125365

Jiseon Park , Seongil Kim , Won Yang , Yongwoon Lee , Jongsup Hong , Karim Rabea , Stavros Michailos , Kevin J. Hughes , Lin Ma , Mohamed Pourkashanian

The global transition toward renewable energy has been accelerating in response to climate change. South Korea has increasingly expanded the adoption of renewable energy, especially solar power. Smart farms are one example of renewable energy applications but require both electricity and heat demand. Previous studies have shown that the target smart farm does not achieve 100% energy self-sufficiency rate under current conditions. Therefore, renewable energy-based autonomous energy systems and their operational strategy are required to reduce grid dependency with full energy autonomy. This study proposes a scenario-based energy autonomy framework that integrates life-cycle assessment and techno-economic analysis for smart farms with coupled electricity and heat demands using measured operational data. Analysis results indicated that the proposed energy autonomous scenario could reduce CO₂ emissions by up to approximately 92% compared to a centralized grid-based system. It also improved economic viability, lowering the LCOE from $0.435 to $0.287/kWh compared with the existing operating model. Sensitivity analysis identified electricity and wood pellet prices as the most influential economic factors. Consequently, a 60% solar-40% biomass configuration provides the optimal balance between environmental performance and economic efficiency. These findings demonstrate the practical feasibility of applying renewable and low-carbon technologies to smart farms within agricultural systems.

为应对气候变化，全球向可再生能源的过渡一直在加速。韩国越来越多地采用可再生能源，特别是太阳能。智能农场是可再生能源应用的一个例子，但同时需要电力和热量需求。以往的研究表明，在目前的条件下，目标智能农场无法实现100%的能源自给率。因此，需要基于可再生能源的自主能源系统及其运行策略来减少对电网的依赖，实现完全的能源自主。本研究提出了一个基于场景的能源自主框架，该框架将智能农场的生命周期评估和技术经济分析与测量的运行数据相结合。分析结果表明，与集中式电网系统相比，拟议的能源自主方案可以减少高达约92%的二氧化碳排放。与现有的运营模式相比，它还提高了经济可行性，将LCOE从0.435美元/千瓦时降低到0.287美元/千瓦时。敏感性分析发现电力和木屑颗粒价格是影响最大的经济因素。因此，60%的太阳能-40%的生物质配置提供了环境性能和经济效率之间的最佳平衡。这些发现证明了在农业系统内将可再生能源和低碳技术应用于智能农场的实际可行性。

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引用次数: 0

Research on the calculation method of key thermal parameters and the thermal performance differences in different climate zones of the facade BIPV component 研究了外立面BIPV构件关键热工参数的计算方法及不同气候带的热工性能差异

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-05 DOI: 10.1016/j.renene.2026.125336

Lei Qu , Dengjia Wang , Yanfeng Liu , Xingzhen Deng , Baichao Wang , Xuan Song , Jianhua Fan

Evaluating the thermal performance of facade BIPV components in practical engineering applications remains a challenge. To quantify the impact of their thermal effects, this study proposes the equivalent additional thermal resistance (ΔR_BIPV) and the equivalent heat transfer coefficient (K_BIPV), together with their calculation methods. The differences in ΔR_BIPV among five climate zones in China, including the severe cold zone, cold zone, hot summer and cold winter zone, hot summer and warm winter zone, and mild climate zone, are systematically analyzed. The K_BIPV values for the five climate zones are further compared with the corresponding limits of external wall heat transfer coefficients (K_limit) specified in the building thermal code, and based on this comparison, strategies for reducing external wall insulation thickness are proposed. The results indicate that the annual average ΔR_BIPV values for the five climate zones are 1.07, 1.01, 0.98, 0.97, and 1.03 m² K/W, respectively. With the application of facade BIPV components, the insulation thickness of external walls in Zone I and II can be reduced by 42 mm and 39 mm, respectively, while no additional insulation layer is required for Zone III, IV, and V.

评估幕墙BIPV组件在实际工程应用中的热性能仍然是一个挑战。为了量化其热效应的影响，本研究提出了等效附加热阻（ΔRBIPV）和等效传热系数（KBIPV）及其计算方法。系统分析了中国高寒区、寒带区、夏热冬冷区、夏热冬暖区、温和气候区5个气候带ΔRBIPV的差异。将五个气候带的KBIPV值与建筑热规范中规定的相应外墙换热系数限值（Klimit）进行比较，并在此基础上提出降低外墙保温厚度的策略。结果表明，5个气候带的年平均值ΔRBIPV分别为1.07、1.01、0.98、0.97和1.03 m2 K/W。立面BIPV组件的应用，可使I区和II区外墙保温厚度分别减少42 mm和39 mm，而III区、IV区和V区无需增加保温层。

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引用次数: 0

Advanced fully analytical model for U-shaped closed-loop geothermal system: Heat transport and system performance 先进的u型闭环地热系统全解析模型：热传递与系统性能

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-03 DOI: 10.1016/j.renene.2026.125381

Wenying Tang , Zixu Hu , Yilong Yuan , Dongxue Hao , Rong Chen , Jianqing Lin , Bo Feng , Tianfu Xu

The U-shaped closed-loop geothermal system is a key direction for geothermal development due to its high flow rate and heat extraction. Accurate performance evaluation is essential to improve utilization efficiency. Traditional analytical models inadequately describe energy transfer, while numerical simulations are complex and time-consuming, hindering rapid assessment and mechanistic analysis. This study proposes a novel fully analytical wellbore–reservoir coupling model for deep U-shaped closed-loop systems, capturing heat transfer between formation and wellbore. The model precisely analyzes the process with minimal computation, overcomes numerical-simulation limitations, and agrees well with field data. Using this model, multi-factor coupling parameter impacts are quantified: increasing drilling depth has the most significant effect on enhancing heat production efficiency, and heat loss in the shallow wellbore section is negligible, with no significant impact on overall performance. The findings provide valuable guidance for optimizing and applying U-shaped closed-loop systems under diverse geological conditions.

u型闭环地热系统具有高流量、高抽热的特点，是地热开发的重要方向。准确的性能评价是提高利用效率的关键。传统的分析模型不能充分描述能量传递，而数值模拟复杂且耗时，阻碍了快速评估和机理分析。该研究为深u型闭环系统提出了一种全新的全解析井筒-油藏耦合模型，可以捕捉地层与井筒之间的热传递。该模型以最小的计算量精确地分析了过程，克服了数值模拟的局限性，与现场数据吻合良好。利用该模型，量化了多因素耦合参数的影响：增加钻井深度对提高产热效率的影响最为显著，浅井段的热损失可以忽略不计，对整体性能没有显著影响。研究结果对不同地质条件下u型闭环系统的优化应用具有指导意义。

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引用次数: 0

Renewable energy and climate change mitigation: A legal framework for sustainable transitions in Nigeria and beyond 可再生能源和减缓气候变化：尼日利亚及其他地区可持续转型的法律框架

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-02 DOI: 10.1016/j.renene.2026.125374

Olusola Joshua Olujobi, Nachanuya Silas Abangu

This paper examines how Nigerian laws have been utilised to promote electricity generation from renewable energy sources as a means of addressing climate change. It explores the intricate interconnection between laws and the advancement of renewable energy programmes. Amidst inadequate energy access and significant emissions levels, Nigeria finds itself at a critical stage of energy law transition. Employing doctrinal legal research methodology, the study analyses existing Nigerian renewable energy laws and relevant international legal instruments to assess the prospects and challenges in this sector. A key finding is the absence of an integrated legal framework necessary for fostering an enabling environment for renewable energy deployment. The paper proposes a hybrid legal model that incorporates statutory reforms, regulatory incentives, and multi-stakeholder engagement. It further argues that Nigeria's over-reliance on fossil fuels impedes the growth of renewable energy, contravening its commitments under the Paris Agreement 2015. Beyond diagnosing challenges, the study outlines opportunities for growth, recommending the establishment of a specialised renewable energy statutory authority to oversee renewable energy development. It also advances policy and legal strategies for promoting investment, ensuring a just and sustainable energy transition, and creating a favourable environment for foreign direct investment, thereby enhancing Nigeria's energy security and economic resilience.

这篇论文考察了尼日利亚的法律如何被用来促进可再生能源发电，作为应对气候变化的一种手段。它探讨了法律和可再生能源计划之间错综复杂的相互关系。由于能源获取不足和排放水平高，尼日利亚发现自己处于能源法转型的关键阶段。该研究采用理论法律研究方法，分析了尼日利亚现有的可再生能源法律和相关的国际法律文书，以评估该领域的前景和挑战。一项重要的发现是，缺乏为可再生能源部署创造有利环境所必需的综合法律框架。本文提出了一种混合法律模式，将法定改革、监管激励和多方利益相关者参与结合起来。它进一步认为，尼日利亚对化石燃料的过度依赖阻碍了可再生能源的发展，违反了其在2015年《巴黎协定》中的承诺。除了诊断挑战之外，该研究还概述了增长的机会，建议建立一个专门的可再生能源法定机构来监督可再生能源的发展。它还推进促进投资的政策和法律战略，确保公正和可持续的能源转型，并为外国直接投资创造有利的环境，从而增强尼日利亚的能源安全和经济弹性。

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