首页 > 最新文献

Journal of Energy Systems最新文献

英文 中文
A comprehensive analysis on the grid-tied solar photovoltaics for clean energy mix and supply in Nigeria’s on-grid power 并网太阳能光伏发电在尼日利亚并网电力中的清洁能源结构和供应的综合分析
Q3 Energy Pub Date : 2023-03-31 DOI: 10.30521/jes.988844
C. Diyoke, U. Ngwaka, K. Ugwu
Nigeria’s power infrastructure is dominated by polluting grid-connected fossil-based power systems. The Nation currently suffers from an acute electricity shortage, making nearly 40% of on-grid customers receive unreliable and inconsistent power below their demand. Solar resources are widespread in the country at considerably good potential than in many European nations. Nevertheless, Nigeria's solar photovoltaic (PV) installation capacity could be better. This paper presents the techno-economic, environmental and risk analysis of a grid-connected 10 kW, 100 kW, and 1 MW PV system for three customer segments in Abuja, Nigeria. It is found that a 1 MW grid-tied PV system is very viable at an electricity export rate not below 0.01 $/kWh and a total initial cost (TIC) of not more than 2000 $/kW for fixed axis system and 2600 $/kWh or lower for the two-axis system. The 10 kW and 100 kW PV systems are only financially viable with fiscal incentives. However, they become profitable with a minimum feed-in tariff of about 0.294, 0.297, 0.223 and 0.214 $/kWh for the fixed 10 kW, 2-axis 10 kW, fixed 100 kW and two-axis 100 kW systems, respectively.
尼日利亚的电力基础设施主要是污染严重的与电网相连的化石燃料电力系统。国家目前正遭受着严重的电力短缺,使得近40%的并网用户获得不可靠和不稳定的电力低于他们的需求。太阳能资源在该国广泛分布,其潜力比许多欧洲国家大得多。尽管如此,尼日利亚的太阳能光伏(PV)安装能力可能会更好。本文介绍了尼日利亚阿布贾并网的10千瓦、100千瓦和1兆瓦光伏系统的技术经济、环境和风险分析。研究发现,1兆瓦并网光伏系统在电力输出率不低于0.01美元/千瓦时,固定轴系统的总初始成本(TIC)不超过2000美元/千瓦时,两轴系统的总初始成本(TIC)不超过2600美元/千瓦时或更低时是非常可行的。10千瓦和100千瓦的光伏系统只有在财政激励下才具有经济可行性。然而,对于固定10千瓦、两轴10千瓦、固定100千瓦和两轴100千瓦系统,它们的最低上网电价分别约为0.294美元、0.297美元、0.223美元和0.214美元/千瓦时,它们是有利可图的。
{"title":"A comprehensive analysis on the grid-tied solar photovoltaics for clean energy mix and supply in Nigeria’s on-grid power","authors":"C. Diyoke, U. Ngwaka, K. Ugwu","doi":"10.30521/jes.988844","DOIUrl":"https://doi.org/10.30521/jes.988844","url":null,"abstract":"Nigeria’s power infrastructure is dominated by polluting grid-connected fossil-based power systems. The Nation currently suffers from an acute electricity shortage, making nearly 40% of on-grid customers receive unreliable and inconsistent power below their demand. Solar resources are widespread in the country at considerably good potential than in many European nations. Nevertheless, Nigeria's solar photovoltaic (PV) installation capacity could be better. This paper presents the techno-economic, environmental and risk analysis of a grid-connected 10 kW, 100 kW, and 1 MW PV system for three customer segments in Abuja, Nigeria. It is found that a 1 MW grid-tied PV system is very viable at an electricity export rate not below 0.01 $/kWh and a total initial cost (TIC) of not more than 2000 $/kW for fixed axis system and 2600 $/kWh or lower for the two-axis system. The 10 kW and 100 kW PV systems are only financially viable with fiscal incentives. However, they become profitable with a minimum feed-in tariff of about 0.294, 0.297, 0.223 and 0.214 $/kWh for the fixed 10 kW, 2-axis 10 kW, fixed 100 kW and two-axis 100 kW systems, respectively.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45598631","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: 1
Design and implementation of a robust ANN-PID corrector to improve high penetrations photovoltaic solar energy connected to the grid 一种鲁棒ANN-PID校正器的设计与实现,以改善高穿透光伏太阳能并网
Q3 Energy Pub Date : 2023-03-31 DOI: 10.30521/jes.1053423
D. Gueye, A. Ndiaye, Amadou Diao
The best quality of PV energy into the grid is now problematic that is why this paper focuses on the design and implementation of a robust Proportional Integral Derivative based on Artificial Neural Network (ANN-PID). This technique used to ensure the regulation of the Boost Converter (BC) output voltage and the Three Phase Inverter (3 PI) output currents of a photovoltaic solar system (PVS) connected to the grid. The mathematical model of the DC bus and the 3-PI is presented. Applications under Matlab/Simulink justify the efficiency of the neural regulator. In comparison with the conventional one, the proposed method presents the best follow-up of the DC link voltage reference and a maximum overshoot of 3.16 %. In addition, despite the long time put in transient mode, the proposed method keeps better robustness and ensures an injection of current of a total harmonic distortion (THD) of 0.96 % against 2.18 % of the classical PID regulator.
进入电网的光伏能量的最佳质量现在是个问题,这就是为什么本文专注于基于人工神经网络(ANN-PID)的鲁棒比例积分导数的设计和实现。该技术用于确保连接到电网的光伏太阳能系统(PVS)的升压转换器(BC)输出电压和三相逆变器(3PI)输出电流的调节。给出了直流母线和3-PI的数学模型。在Matlab/Simulink下的应用证明了神经调节器的有效性。与传统方法相比,所提出的方法呈现出DC链路电压参考的最佳跟随和3.16%的最大过冲。此外,尽管处于瞬态模式的时间很长,但所提出的方法保持了更好的鲁棒性,并确保了总谐波失真(THD)为0.96%的电流注入,而传统PID调节器的总谐波失真为2.18%。
{"title":"Design and implementation of a robust ANN-PID corrector to improve high penetrations photovoltaic solar energy connected to the grid","authors":"D. Gueye, A. Ndiaye, Amadou Diao","doi":"10.30521/jes.1053423","DOIUrl":"https://doi.org/10.30521/jes.1053423","url":null,"abstract":"The best quality of PV energy into the grid is now problematic that is why this paper focuses on the design and implementation of a robust Proportional Integral Derivative based on Artificial Neural Network (ANN-PID). This technique used to ensure the regulation of the Boost Converter (BC) output voltage and the Three Phase Inverter (3 PI) output currents of a photovoltaic solar system (PVS) connected to the grid. The mathematical model of the DC bus and the 3-PI is presented. Applications under Matlab/Simulink justify the efficiency of the neural regulator. In comparison with the conventional one, the proposed method presents the best follow-up of the DC link voltage reference and a maximum overshoot of 3.16 %. In addition, despite the long time put in transient mode, the proposed method keeps better robustness and ensures an injection of current of a total harmonic distortion (THD) of 0.96 % against 2.18 % of the classical PID regulator.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46203742","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 investigations on a triple fluid heat exchanger with helical and sinusoidal coils 螺旋盘管和正弦盘管三层流体换热器的数值研究
Q3 Energy Pub Date : 2023-03-31 DOI: 10.30521/jes.1116707
Suresh Mariappan
A modification is made in the existing concentric heat exchanger design to enhance its heat duty. A standard concentric tube heat exchanger is modified by considering two inner tubes with a combination of helical and sinusoidal coils. Numerical studies are performed in this triple fluid heat exchanger to assess its thermal performance by taking into account mass flow rate, fluid temperatures, heat transfer, which are governed by fundamental heat transfer equations. Computational fluid dynamics simulation methodology together with local and element-by-element method is applied with a MatLab computer code. Hot water and milk fluids are used as working fluids in helical and sinusoidal coils, respectively. Cooling water is used as shell side fluid. The attainment of high heat-load-per-unit-area and high surface-area-to-volume ratio is used as optimizing parameter in the simulations. The helical coil provides an increase in heat transfer rate and overall heat transfer coefficient increases by a percentage 13% for varying hot fluid flow rates, when it is compared with the sinusoidal coil. The pressure drop for the helical coil increases, exponentially compared to the sinusoidal coil, thereby it shows a higher pumping power for the helical coil.
对现有的同心换热器设计进行了改进,提高了换热器的热负荷。通过考虑螺旋线圈和正弦线圈组合的两个内管,对标准同心管换热器进行了改进。数值研究在这种三流体热交换器中进行,通过考虑质量流量,流体温度,传热,这是由基本传热方程控制的热性能评估。应用计算流体力学仿真方法,结合局部法和逐元法,编制了MatLab计算机程序。热水和牛奶流体分别用作螺旋线圈和正弦线圈中的工作流体。冷却水用作壳侧流体。模拟中以获得高单位面积热负荷和高表面积体积比为优化参数。与正弦线圈相比,螺旋线圈增加了传热速率,随着热流体流速的变化,总传热系数增加了13%。与正弦线圈相比,螺旋线圈的压降呈指数级增长,因此螺旋线圈的泵送功率更高。
{"title":"Numerical investigations on a triple fluid heat exchanger with helical and sinusoidal coils","authors":"Suresh Mariappan","doi":"10.30521/jes.1116707","DOIUrl":"https://doi.org/10.30521/jes.1116707","url":null,"abstract":"A modification is made in the existing concentric heat exchanger design to enhance its heat duty. A standard concentric tube heat exchanger is modified by considering two inner tubes with a combination of helical and sinusoidal coils. Numerical studies are performed in this triple fluid heat exchanger to assess its thermal performance by taking into account mass flow rate, fluid temperatures, heat transfer, which are governed by fundamental heat transfer equations. Computational fluid dynamics simulation methodology together with local and element-by-element method is applied with a MatLab computer code. Hot water and milk fluids are used as working fluids in helical and sinusoidal coils, respectively. Cooling water is used as shell side fluid. The attainment of high heat-load-per-unit-area and high surface-area-to-volume ratio is used as optimizing parameter in the simulations. The helical coil provides an increase in heat transfer rate and overall heat transfer coefficient increases by a percentage 13% for varying hot fluid flow rates, when it is compared with the sinusoidal coil. The pressure drop for the helical coil increases, exponentially compared to the sinusoidal coil, thereby it shows a higher pumping power for the helical coil.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46377049","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
Wind turbine inspection with drone: Advantages and disadvantages 无人机风力机检测:优缺点
Q3 Energy Pub Date : 2023-03-31 DOI: 10.30521/jes.1148877
Harun Tanriverdi̇, Güzide Karakuş, Ahmet Ulukan
The facilities on wind energy generation are increasingly finding usage areas in line with the ecologically friendly energy generation approach. One of the important activities of wind power generation facilities, which have high investment cost, low operating cost and low environmental impact is the maintenance and repair of wind turbines. A preventive maintenance approach is dominant to reduce maintenance times and eliminate lost time in wind turbines. Damage inspection of turbines has been evolved from tower crane access, rope access, camera viewing, and other applications to image with manual drones over the years. However, when these methods are evaluated within the framework of criteria such as cost, performance, occupational safety and data reliability, they are still insufficient and the need for inspection with autonomous drones arises. The advantages and disadvantages of autonomous drones used in the determination of damage in wind turbines are analyzed and the results are considered to contribute to the practitioners operating in the sector and academicians working in the field.
风能发电设施越来越多地找到符合生态友好能源发电方法的使用区域。风力发电设施投资成本高、运行成本低、环境影响小,其重要活动之一是风力涡轮机的维护和维修。预防性维护方法在减少风力涡轮机的维护时间和消除损失时间方面占主导地位。多年来,涡轮机的损坏检查已经从塔式起重机进入、绳索进入、摄像头查看和其他应用发展到手动无人机成像。然而,当在成本、性能、职业安全和数据可靠性等标准的框架内对这些方法进行评估时,它们仍然不够,需要使用无人驾驶飞机进行检查。分析了用于确定风力涡轮机损坏的自主无人机的优缺点,并认为其结果有助于该行业的从业者和该领域的院士。
{"title":"Wind turbine inspection with drone: Advantages and disadvantages","authors":"Harun Tanriverdi̇, Güzide Karakuş, Ahmet Ulukan","doi":"10.30521/jes.1148877","DOIUrl":"https://doi.org/10.30521/jes.1148877","url":null,"abstract":"The facilities on wind energy generation are increasingly finding usage areas in line with the ecologically friendly energy generation approach. One of the important activities of wind power generation facilities, which have high investment cost, low operating cost and low environmental impact is the maintenance and repair of wind turbines. A preventive maintenance approach is dominant to reduce maintenance times and eliminate lost time in wind turbines. Damage inspection of turbines has been evolved from tower crane access, rope access, camera viewing, and other applications to image with manual drones over the years. However, when these methods are evaluated within the framework of criteria such as cost, performance, occupational safety and data reliability, they are still insufficient and the need for inspection with autonomous drones arises. The advantages and disadvantages of autonomous drones used in the determination of damage in wind turbines are analyzed and the results are considered to contribute to the practitioners operating in the sector and academicians working in the field.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47656916","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
Energy efficient cooling through natural ventilation in Kosovo 科索沃通过自然通风实现节能制冷
Q3 Energy Pub Date : 2023-03-31 DOI: 10.30521/jes.1090315
M. Dugolli
The buildings consume nearly 55% of global electricity. As people are forced to spend more time indoors after pandemic COVID 19, energy efficient, well ventilated, adequate indoor air quality became critical for their health. The household energy consumption is mostly for heating but also for cooling in Kosovo. Aiming to improve energy efficiency, a passive cooling strategy can be applied by using a natural ventilation as the most essential method. However, that requires an analysis of different factors such as positions and the sizes of the openings within one area, the specific period used for ventilation, and the external temperatures and conditions. In this work, the computer application Optivent 2 was used to analyze a generic airflow strategy and evaluate the decisions regarding the feasibility of cooling with natural ventilation for a single house in Kosovo during the warmest month of the year (i.e. August). The results prove that the natural ventilation during the day at the houses, which the areas have only one-sided openings, is effective only for fresh air flow but not sufficient for cooling purposes. When the openings are designed on the opposite walls of the rooms or areas, the conditions will enable that through cross ventilation, the area will be cooled at the same time, by achieving up to 90% of the accessibility limits of comfort, both during the day and nights, at different scenarios on the warmest summer months in Kosovo. These findings will help the architects of Kosovo to identify the proper and most effective passive designs strategy, when it comes to buildings cooling during the summer, in order to achieve the maximal benefit of their designs and the operation of their designed building.
这些建筑消耗了全球近55%的电力。新冠肺炎疫情后,人们被迫在室内度过更多时间,节能、通风良好、充足的室内空气质量对他们的健康至关重要。在科索沃,家庭能源消耗主要用于供暖,也用于制冷。为了提高能源效率,可以采用被动冷却策略,将自然通风作为最基本的方法。然而,这需要分析不同的因素,如一个区域内开口的位置和大小,用于通风的特定时间,以及外部温度和条件。在这项工作中,使用计算机应用程序Optivent 2分析了一种通用的气流策略,并评估了在一年中最温暖的月份(即8月)为科索沃的单个房屋使用自然通风冷却的可行性决策。结果证明,白天房屋的自然通风仅对新鲜空气流动有效,但不足以达到冷却目的。当开口设计在房间或区域的相对墙壁上时,条件将使通过交叉通风,该区域将同时降温,在科索沃最温暖的夏季的不同情况下,无论是白天和夜晚,该区域都将达到90%的可达性舒适限制。这些发现将有助于科索沃的建筑师确定适当和最有效的被动式设计策略,当涉及到建筑物在夏季冷却时,为了实现他们的设计和设计建筑的最大效益。
{"title":"Energy efficient cooling through natural ventilation in Kosovo","authors":"M. Dugolli","doi":"10.30521/jes.1090315","DOIUrl":"https://doi.org/10.30521/jes.1090315","url":null,"abstract":"The buildings consume nearly 55% of global electricity. As people are forced to spend more time indoors after pandemic COVID 19, energy efficient, well ventilated, adequate indoor air quality became critical for their health. The household energy consumption is mostly for heating but also for cooling in Kosovo. Aiming to improve energy efficiency, a passive cooling strategy can be applied by using a natural ventilation as the most essential method. However, that requires an analysis of different factors such as positions and the sizes of the openings within one area, the specific period used for ventilation, and the external temperatures and conditions. In this work, the computer application Optivent 2 was used to analyze a generic airflow strategy and evaluate the decisions regarding the feasibility of cooling with natural ventilation for a single house in Kosovo during the warmest month of the year (i.e. August). The results prove that the natural ventilation during the day at the houses, which the areas have only one-sided openings, is effective only for fresh air flow but not sufficient for cooling purposes. When the openings are designed on the opposite walls of the rooms or areas, the conditions will enable that through cross ventilation, the area will be cooled at the same time, by achieving up to 90% of the accessibility limits of comfort, both during the day and nights, at different scenarios on the warmest summer months in Kosovo. These findings will help the architects of Kosovo to identify the proper and most effective passive designs strategy, when it comes to buildings cooling during the summer, in order to achieve the maximal benefit of their designs and the operation of their designed building.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46072889","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: 3
Grid-connected photovoltaics prosumers to support smart city development in Rwanda: A case study for Ayabaraya Village 并网光伏产消户支持卢旺达智慧城市发展:Ayabaraya村案例研究
Q3 Energy Pub Date : 2023-03-31 DOI: 10.30521/jes.1086675
Fabien Mukundufite, Jean D'amour Ni̇yonsaba, Jean Marie V. Bikorimana, Alexander KYARUZİ LUGATONA
Access to electricity is among the important targets in Rwanda as in other regions. The grid-connected photovoltaic (PV) prosumers market segment can contribute to the rate of access to electricity in Rwanda. Grid connected PV prosumers contribute in not only increasing electricity generation capacity but also producing affordable and reliable electrical energy. Therefore, the current research analyzes the possibilities of interconnection of small-scale prosumers with a national grid. In addition, the bidirectional flow of electricity either from prosumer grid and vice versa, aiming at monitoring the continuous power supply of the load is analyzed. The study is conducted in Ayabaraya village in Rwanda and the load profile for residential, commercial and industrial prosumers are analyzed. In this research, meteorological data from Photovoltaic Geographical Information System (PVGIS) up to 2016 is used to give global horizontal irradiation and ambient temperature. The amount of energy imported from and exported to the grid is determined by the connected appliances, the capacity of the PV system, and the amount of available irradiance at the time. The Home Energy Management System (HEMS), inverter control strategies, and prosumer load types are considered. The simulation reveals that available irradiance less than 30W/m2 at a time is below the grid-tie inverter's threshold power thus, the prosumer imports electricity from the grid. At irradiance larger than 30W/m2, the prosumer may optimize self-consumption and injects the surplus into grid.
与其他地区一样,获得电力是卢旺达的重要目标之一。并网光伏(PV)产消市场部分可以为卢旺达的电力普及率做出贡献。并网光伏产电用户不仅提高了发电能力,而且生产了价格合理、可靠的电能。因此,本研究分析了小规模产消者与国家电网互联的可能性。此外,还分析了产消电网双向供电和产消电网双向供电的情况,以监测负荷的连续供电情况。该研究在卢旺达的Ayabaraya村进行,并分析了住宅、商业和工业消费的负荷概况。本研究利用光伏地理信息系统(PVGIS)截至2016年的气象数据,给出全球水平辐射和环境温度。从电网输入和输出的能量由连接的设备、光伏系统的容量和当时的可用辐照度决定。考虑了家庭能源管理系统(HEMS)、逆变器控制策略和产消负荷类型。仿真结果表明,每次可用辐照度小于30W/m2,低于并网逆变器的阈值功率,因此产消者从电网输入电力。当辐照度大于30W/m2时,产消者可优化自用,将剩余电量注入电网。
{"title":"Grid-connected photovoltaics prosumers to support smart city development in Rwanda: A case study for Ayabaraya Village","authors":"Fabien Mukundufite, Jean D'amour Ni̇yonsaba, Jean Marie V. Bikorimana, Alexander KYARUZİ LUGATONA","doi":"10.30521/jes.1086675","DOIUrl":"https://doi.org/10.30521/jes.1086675","url":null,"abstract":"Access to electricity is among the important targets in Rwanda as in other regions. The grid-connected photovoltaic (PV) prosumers market segment can contribute to the rate of access to electricity in Rwanda. Grid connected PV prosumers contribute in not only increasing electricity generation capacity but also producing affordable and reliable electrical energy. Therefore, the current research analyzes the possibilities of interconnection of small-scale prosumers with a national grid. In addition, the bidirectional flow of electricity either from prosumer grid and vice versa, aiming at monitoring the continuous power supply of the load is analyzed. The study is conducted in Ayabaraya village in Rwanda and the load profile for residential, commercial and industrial prosumers are analyzed. In this research, meteorological data from Photovoltaic Geographical Information System (PVGIS) up to 2016 is used to give global horizontal irradiation and ambient temperature. The amount of energy imported from and exported to the grid is determined by the connected appliances, the capacity of the PV system, and the amount of available irradiance at the time. The Home Energy Management System (HEMS), inverter control strategies, and prosumer load types are considered. The simulation reveals that available irradiance less than 30W/m2 at a time is below the grid-tie inverter's threshold power thus, the prosumer imports electricity from the grid. At irradiance larger than 30W/m2, the prosumer may optimize self-consumption and injects the surplus into grid.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45357066","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
Modelling and fuzzy logic based control scheme for a series hybrid electric vehicle 基于模糊逻辑的串联混合动力汽车建模控制方案
Q3 Energy Pub Date : 2023-03-31 DOI: 10.30521/jes.1107190
Latif Kasım Uysal, N. Altin
Ever stricter emission regulations, declining petroleum resources, increasing pollution, and global warming triggered an interest in e-mobility. Although fully electrified transportation is targeted, hybrid electric vehicles have become attractive during this transition period due to reasons such as battery challenges, range anxiety, grid capacity, and charging infrastructure. Hybrid electrical vehicles require challenging energy management systems due to the increasing number of components and energy conversions. This paper aims to introduce a simple yet effective control scheme to control the battery state-of-charge (SOC) and regenerative braking of a hybrid electric vehicle. For this purpose, a fuzzy logic controller is developed, three inputs as the SOC, driver demand, and vehicle velocity are defined. Instead of torque or power requirement, which are commonly used as controller inputs in the literature, a more straightforward method is adopted by using the accelerator and brake pedal positions. The controller manages the engine power and regenerative braking intensity. A series hybrid electric vehicle model is created in the MATLAB/Simulink environment to validate the performance of the proposed controller. The proposed controller aims to keep the SOC between 30-40% after charge depleting mode, and ensures prevention of regenerative braking at high SOC values to prevent overcharging. Simulations have been performed according to NEDC and WLTC, show that the proposed controller is able to realize design objectives.
越来越严格的排放法规、不断减少的石油资源、日益严重的污染和全球变暖引发了人们对电子交通的兴趣。尽管全电动交通是目标,但由于电池挑战、续航里程焦虑、电网容量和充电基础设施等原因,混合动力汽车在这一过渡期变得很有吸引力。由于部件数量和能量转换的增加,混合动力电动汽车需要具有挑战性的能量管理系统。本文旨在介绍一种简单而有效的控制方案,以控制混合动力电动汽车的电池充电状态(SOC)和再生制动。为此,开发了一种模糊逻辑控制器,定义了SOC、驾驶员需求和车速三个输入。与文献中通常用作控制器输入的扭矩或功率要求不同,采用了一种更直接的方法,即使用加速器和制动踏板位置。控制器管理发动机功率和再生制动强度。在MATLAB/Simulink环境下建立了串联混合动力汽车模型,验证了所提出控制器的性能。所提出的控制器旨在在电荷耗尽模式后将SOC保持在30-40%之间,并确保在高SOC值下防止再生制动,以防止过度充电。根据NEDC和WLTC进行了仿真,表明所提出的控制器能够实现设计目标。
{"title":"Modelling and fuzzy logic based control scheme for a series hybrid electric vehicle","authors":"Latif Kasım Uysal, N. Altin","doi":"10.30521/jes.1107190","DOIUrl":"https://doi.org/10.30521/jes.1107190","url":null,"abstract":"Ever stricter emission regulations, declining petroleum resources, increasing pollution, and global warming triggered an interest in e-mobility. Although fully electrified transportation is targeted, hybrid electric vehicles have become attractive during this transition period due to reasons such as battery challenges, range anxiety, grid capacity, and charging infrastructure. Hybrid electrical vehicles require challenging energy management systems due to the increasing number of components and energy conversions. This paper aims to introduce a simple yet effective control scheme to control the battery state-of-charge (SOC) and regenerative braking of a hybrid electric vehicle. For this purpose, a fuzzy logic controller is developed, three inputs as the SOC, driver demand, and vehicle velocity are defined. Instead of torque or power requirement, which are commonly used as controller inputs in the literature, a more straightforward method is adopted by using the accelerator and brake pedal positions. The controller manages the engine power and regenerative braking intensity. A series hybrid electric vehicle model is created in the MATLAB/Simulink environment to validate the performance of the proposed controller. The proposed controller aims to keep the SOC between 30-40% after charge depleting mode, and ensures prevention of regenerative braking at high SOC values to prevent overcharging. Simulations have been performed according to NEDC and WLTC, show that the proposed controller is able to realize design objectives.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41505366","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
Impact of PCM type on photocell performance using heat pipe-PCM cooling system: A numerical study 热管-PCM冷却系统中PCM类型对光电池性能影响的数值研究
Q3 Energy Pub Date : 2023-03-31 DOI: 10.30521/jes.1159281
Ramadan Gad, H. Mahmoud, S. Ookawara, Hamdy Hassan
The effectiveness of a hybrid cooling system consisting of flat heat pipes (HP) and a heat sink of phase change material (PCM) for the temperature regulation of the photocell (PV) is studied. The system is mathematically modeled and numerically solved by using MatLab software. The impact of the type of PCM (RT25, RT35, and RT42) in summer on the performance of the hybrid photocell cooling system is analyzed. Results prove that the HP-PCM cooling system performs better than the natural photocell cooling. PCM with a low melting point is more efficient for electric performance than a high melting point. For a given PCM thickness of 4 cm, the maximum temperature of the photocell is reduced by 8.7 °C when PCM RT25 is used as a heat sink compared to 7.5 °C and 7.3 °C for RT35 and RT42, respectively. RT25-based PV/HP-PCM system outperformed a conventionally cooled photocell in terms of electrical efficiency by 5.3%. In comparison, RT35 and RT42 yield incremental gains of 5% and 4.5 %, respectively. As the PCM melting point is lowered, the hourly thermal efficiency increases with a peak of 48.9% for RT25, 33.7% for RT35, and 32.2% for RT42, respectively.
研究了由平板热管(HP)和相变材料散热器(PCM)组成的混合冷却系统对光电池(PV)温度调节的有效性。利用MatLab软件对系统进行了数学建模和数值求解。分析了夏季PCM类型(RT25、RT35和RT42)对混合光电池冷却系统性能的影响。结果表明,HP-PCM冷却系统的冷却性能优于天然光电池冷却系统。具有低熔点的PCM比具有高熔点的PCM更有效地提高电性能。当PCM厚度为4 cm时,与RT35和RT42的最高温度分别为7.5°C和7.3°C相比,使用PCM RT25作为散热片时,光电池的最高温度降低了8.7°C。基于rt25的PV/HP-PCM系统在电效率方面比传统冷却光电池高出5.3%。相比之下,RT35和RT42分别获得5%和4.5%的增量收益。随着PCM熔点的降低,RT25、RT35和RT42的小时热效率分别达到48.9%、33.7%和32.2%的峰值。
{"title":"Impact of PCM type on photocell performance using heat pipe-PCM cooling system: A numerical study","authors":"Ramadan Gad, H. Mahmoud, S. Ookawara, Hamdy Hassan","doi":"10.30521/jes.1159281","DOIUrl":"https://doi.org/10.30521/jes.1159281","url":null,"abstract":"The effectiveness of a hybrid cooling system consisting of flat heat pipes (HP) and a heat sink of phase change material (PCM) for the temperature regulation of the photocell (PV) is studied. The system is mathematically modeled and numerically solved by using MatLab software. The impact of the type of PCM (RT25, RT35, and RT42) in summer on the performance of the hybrid photocell cooling system is analyzed. Results prove that the HP-PCM cooling system performs better than the natural photocell cooling. PCM with a low melting point is more efficient for electric performance than a high melting point. For a given PCM thickness of 4 cm, the maximum temperature of the photocell is reduced by 8.7 °C when PCM RT25 is used as a heat sink compared to 7.5 °C and 7.3 °C for RT35 and RT42, respectively. RT25-based PV/HP-PCM system outperformed a conventionally cooled photocell in terms of electrical efficiency by 5.3%. In comparison, RT35 and RT42 yield incremental gains of 5% and 4.5 %, respectively. As the PCM melting point is lowered, the hourly thermal efficiency increases with a peak of 48.9% for RT25, 33.7% for RT35, and 32.2% for RT42, respectively.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43752728","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: 5
The heat transfer with nanomaterial enhanced phase change materials in different container shapes 纳米材料增强相变材料在不同容器形状下的传热研究
Q3 Energy Pub Date : 2023-03-18 DOI: 10.30521/jes.1160434
Allan Muzhanje, M. Hassan, S. Ookawara, Hamdy Hassan
The heat transfer is studied during the melting and solidification of sp11 and sp24 phase change materials in different container shapes. The materials are further mixed with nano-alumina and nano CuO enhancements. We aim to identify the most favorable phase change material for free-cooling in summer and free-heating in winter. Ansys Fluent 20.2 is used to analyze the 2D models for the melting and solidification mechanisms of the phase change samples in cylindrical, square, rectangular, and elliptical-shaped capsules. The nanomaterial-enhanced phase change material improves the melting and solidification behavior over the base phase change material by as much as 9.8%. It is further observed that the nanomaterial-enhanced phase change material particularly in the rectangular-shaped containers has faster melting and solidification rates by over 43% compared to the others. The material sp24 with 4% nano-alumina in a rectangular profile has the shortest melting times ~70-100 mins, when the inlet temperatures are 313 and 318 K. The same material has the shortest solidification time of 426 mins, two times faster compared to the 928 mins observed with the cylindrical capsule under the same conditions. The Sp11 with the nano-alumina in a rectangular capsule also has a short melting time of 134 mins. The rectangular profile is found capable of achieving the highest temperature drop about 3.3 K during free cooling of inlet air using nano-enhanced sp24. A progress is realized in unmasking the potential of the thermal energy battery using hybrid geometry and nanomaterial enhancements.
研究了不同容器形状的sp11和sp24相变材料在熔化和凝固过程中的传热。该材料进一步与纳米氧化铝和纳米CuO增强剂混合。我们的目标是确定最有利于夏季自由冷却和冬季自由加热的相变材料。Ansys Fluent 20.2用于分析圆柱形、方形、矩形和椭圆形胶囊中相变样品的熔化和固化机制的2D模型。与基础相变材料相比,纳米材料增强型相变材料的熔化和固化行为提高了9.8%。进一步观察到,与其他材料相比,特别是在矩形容器中的纳米材料增强相变材料具有更快的熔化和凝固速率,超过43%。当入口温度为313和318 K时,具有4%矩形纳米氧化铝的sp24材料具有最短的熔化时间~70-100分钟。同样的材料具有426分钟的最短固化时间,与在相同条件下用圆柱形胶囊观察到的928分钟相比快了两倍。具有矩形胶囊中的纳米氧化铝的Sp11也具有134分钟的短熔融时间。发现矩形轮廓能够在使用纳米增强sp24的入口空气的自由冷却期间实现约3.3K的最高温度下降。利用混合几何结构和纳米材料增强,在揭示热能电池的潜力方面取得了进展。
{"title":"The heat transfer with nanomaterial enhanced phase change materials in different container shapes","authors":"Allan Muzhanje, M. Hassan, S. Ookawara, Hamdy Hassan","doi":"10.30521/jes.1160434","DOIUrl":"https://doi.org/10.30521/jes.1160434","url":null,"abstract":"The heat transfer is studied during the melting and solidification of sp11 and sp24 phase change materials in different container shapes. The materials are further mixed with nano-alumina and nano CuO enhancements. We aim to identify the most favorable phase change material for free-cooling in summer and free-heating in winter. Ansys Fluent 20.2 is used to analyze the 2D models for the melting and solidification mechanisms of the phase change samples in cylindrical, square, rectangular, and elliptical-shaped capsules. The nanomaterial-enhanced phase change material improves the melting and solidification behavior over the base phase change material by as much as 9.8%. It is further observed that the nanomaterial-enhanced phase change material particularly in the rectangular-shaped containers has faster melting and solidification rates by over 43% compared to the others. The material sp24 with 4% nano-alumina in a rectangular profile has the shortest melting times ~70-100 mins, when the inlet temperatures are 313 and 318 K. The same material has the shortest solidification time of 426 mins, two times faster compared to the 928 mins observed with the cylindrical capsule under the same conditions. The Sp11 with the nano-alumina in a rectangular capsule also has a short melting time of 134 mins. The rectangular profile is found capable of achieving the highest temperature drop about 3.3 K during free cooling of inlet air using nano-enhanced sp24. A progress is realized in unmasking the potential of the thermal energy battery using hybrid geometry and nanomaterial enhancements.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48816830","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: 2
Benefits of Renewable Energy for Public Health: A Bibliometric Analysis 可再生能源对公共健康的益处:文献计量学分析
Q3 Energy Pub Date : 2023-03-11 DOI: 10.30521/jes.1252122
H. N. DURMUŞ ŞENYAPAR
Renewable energy (RE) is a field in which an increasing number of academic studies are being conducted on multiple dimensions, including technical, economic, political, and social. Wide and varied disciplines conduct research on the processes of making an investment decision in renewable energy, developing, and adopting policies for this purpose, selecting RE suitable for the location, establishing it by taking economic and environmental factors into account, developing energy distribution and storage systems, and supporting regional development. To accurately calculate the installation costs, which are viewed as one of the barriers to a greater use of renewable energy, the co-benefits of RE must be analyzed and transferred to this calculation, and thus to the decision-making processes. Understanding these co-benefits will also facilitate consumer adoption of sustainable energy sources. In addition to economic growth, financial development, employment growth, and regional development, it is crucial to understand the public health benefits of renewable energy. Through bibliometric analysis, which permits the quantification and visualization of qualitative data, the status and development of the literature on the health benefits of RE are examined in this study. The study determined the most researched topics, current issues and trends, and prominent issues in academic studies. The transition to environmentally friendly energies can be accelerated by increasing public awareness of health co-benefits from a more holistic perspective.
可再生能源(RE)是一个越来越多的学术研究正在从多个维度进行的领域,包括技术、经济、政治和社会。广泛而多样的学科对可再生能源投资决策的过程进行研究,为此制定和采用政策,选择适合该地区的可再生能源,通过考虑经济和环境因素建立可再生能源,发展能源分配和储存系统,并支持区域发展。安装成本被视为更多使用可再生能源的障碍之一,为了准确计算安装成本,必须分析可再生能源的共同利益,并将其转移到计算中,从而转移到决策过程中。了解这些共同利益也将促进消费者采用可持续能源。除了经济增长、金融发展、就业增长和区域发展之外,了解可再生能源对公共健康的好处也至关重要。本研究通过文献计量学分析对定性数据进行量化和可视化,考察了可再生能源健康效益的文献现状和发展。该研究确定了研究最多的课题、当前问题和趋势以及学术研究中的突出问题。从更全面的角度提高公众对健康共同利益的认识,可以加速向环境友好型能源的过渡。
{"title":"Benefits of Renewable Energy for Public Health: A Bibliometric Analysis","authors":"H. N. DURMUŞ ŞENYAPAR","doi":"10.30521/jes.1252122","DOIUrl":"https://doi.org/10.30521/jes.1252122","url":null,"abstract":"Renewable energy (RE) is a field in which an increasing number of academic studies are being conducted on multiple dimensions, including technical, economic, political, and social. Wide and varied disciplines conduct research on the processes of making an investment decision in renewable energy, developing, and adopting policies for this purpose, selecting RE suitable for the location, establishing it by taking economic and environmental factors into account, developing energy distribution and storage systems, and supporting regional development. To accurately calculate the installation costs, which are viewed as one of the barriers to a greater use of renewable energy, the co-benefits of RE must be analyzed and transferred to this calculation, and thus to the decision-making processes. Understanding these co-benefits will also facilitate consumer adoption of sustainable energy sources. In addition to economic growth, financial development, employment growth, and regional development, it is crucial to understand the public health benefits of renewable energy. Through bibliometric analysis, which permits the quantification and visualization of qualitative data, the status and development of the literature on the health benefits of RE are examined in this study. The study determined the most researched topics, current issues and trends, and prominent issues in academic studies. The transition to environmentally friendly energies can be accelerated by increasing public awareness of health co-benefits from a more holistic perspective.","PeriodicalId":52308,"journal":{"name":"Journal of Energy Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48341142","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: 3
期刊
Journal of Energy Systems
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1