Electrothermal performance and environmental effects of optimal photovoltaic-thermal system
Electrothermal performance and environmental effects of optimal photovoltaic-thermal system
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DOI：
10.1016/j.enconman.2015.02.014
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发表时间：
2015-05-01
影响因子：
10.4
通讯作者：
Gharehpetian, G. B.
中科院分区：
文献类型：
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作者：
Gholami, H.;Khalilnejad, A.;Gharehpetian, G. B.
伊朗加兹温省胡兹宁市利用太阳能满足电力和热力需求，采用光伏/热能（PVT）系统。虽然提高光伏电池的温度会降低其效率，但吸收热能会提高PVT系统的整体效率。本研究的主要目的是对系统进行建模和优化尺寸，包括 PVT 安装角度、电池和用于提供电力和热负荷的储热罐。在本研究中，考虑了气候条件和可变参数来计算每年每小时的辐照度。然后，获得最大太阳能吸收和提取的定位系统的最佳角度。使用实际模型的物理参数研究家庭消费者的热电需求，并考虑该地区的实际气象数据通过遗传算法进行优化。通过优化得到所需电池的容量。此外，为了确保在严重的不可预测的气候条件下满足需求，需要连接到电网作为系统的备份。最后讨论了该系统的环境影响。在之前的项目中，还没有针对家庭负荷的离网热电联产系统及其考虑热电需求的优化领域进行过任何可行性研究，而本研究讨论了这一点。 (C) 2015 Elsevier Ltd. 保留所有权利。
Photovoltaic/thermal (PVT) system is utilized in order to meet the electrical and thermal demand using solar energy in Khuznin, city in Qazvin Province, Iran. Although increasing the temperature of PV cells decreases their efficiency, absorbing of thermal energy leads to raise the overall efficiency of PVT system. The main purpose of this study is modeling and optimal sizing of the system, including PVT installation angle, electrical battery, and thermal storage tank for supplying electrical and thermal loads. In this study, annual hourly irradiation is calculated considering climatic conditions and variable parameters. Then, optimal angles of locating system for maximum solar power absorption and extraction are obtained. Thermal and electrical demand of a household consumer is investigated using physical parameters of a practical model and optimization through genetic algorithm considering actual meteorological data of the region. The capacity of the needed battery is obtained by optimization. Also, in order to insure the supply of the demand in severe unpredicted climatic conditions, the connection to the grid as a backup for the system is necessary. Finally, the environmental effect of this system is discussed. In the previous projects, there has not been any feasibility study in the field of off-grid, combined thermal and electrical power production system for household loads and its optimization considering heat and electricity demand which is discussed in this study. (C) 2015 Elsevier Ltd. All rights reserved.