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Temperature Dependent Performance of Solar Photovoltaic and Thermal Hybrid Systems
Journal of Contemporary Physics (Armenian Academy of Sciences) ( IF 0.5 ) Pub Date : 2020-12-03 , DOI: 10.3103/s1068337220040180
R. R. Vardanyan , V. K. Dallakyan , M. G. Travajyan

Abstract

Solar photovoltaic-thermal (PVT) hybrid systems have the high potential to be an effective and viable method for producing electricity and thermal energy for low grade heating application. The hybrid system is highly energy efficient with improved electrical efficiency due to cooling of solar cells and gained thermal energy due to heat absorbed by the fluid from the heated cells. Nevertheless, the utilization of these systems is not growing rapidly due to the controversial operational problems, as well as installation and maintenance difficulties in comparison with general separated photovoltaic (PV) and thermal systems. In this paper the operating temperatures of solar cells in PV and PVT collectors in dependence of ambient temperature are investigated. On the base of comparison of operating temperatures of solar cells of PV module and PVT collector the effectivity of PVT system application is assessed. It is shown that there is a ‘critical’ minimum value of ambient temperature below which the PVT system cells have the higher temperatures than the cells in PV modules (‘reverse’ process) and the application of PVT system is not reasonable. The dependence of “critical” temperature on the type and thermal characteristics of PVT system is investigated. The proposed methodology for PVT hybrid systems effectivity assessment can be used by scientists and designers during the development of different hybrid PVT systems.



中文翻译:

太阳能光伏和热电混合系统的温度相关性能

摘要

太阳能光伏-热(PVT)混合系统具有很高的潜力,将成为用于低等级供热应用的电能和热能的一种有效可行的方法。由于太阳能电池的冷却,混合动力系统具有很高的能源效率,并具有改进的电效率,而由于从加热的电池中吸收的流体所吸收的热量,混合动力系统获得的热能更高。然而,与一般的分离式光伏(PV)和热力系统相比,由于有争议的操作问题以及安装和维护困难,这些系统的利用并未迅速增长。在本文中,研究了PV和PVT收集器中太阳能电池的工作温度与环境温度的关系。在比较光伏组件和光伏集热器太阳能电池工作温度的基础上,评估了光伏发电系统应用的有效性。结果表明,存在一个“临界”环境温度最小值,低于该温度时,PVT系统电池的温度要高于PV模块中电池的温度(“反向”过程),因此PVT系统的应用是不合理的。研究了“临界”温度对PVT系统类型和热特性的依赖性。科学家和设计人员在开发不同的混合PVT系统时,可以使用所提出的PVT混合系统有效性评估方法。结果表明,存在一个“临界”环境温度最小值,低于该温度时,PVT系统电池的温度要高于PV模块中电池的温度(“反向”过程),因此PVT系统的应用是不合理的。研究了“临界”温度对PVT系统类型和热特性的依赖性。科学家和设计人员在开发不同的混合PVT系统时,可以使用所提出的PVT混合系统有效性评估方法。结果表明,存在一个“临界”环境温度最小值,低于该温度时,PVT系统电池的温度要高于PV模块中电池的温度(“反向”过程),因此PVT系统的应用是不合理的。研究了“临界”温度对PVT系统类型和热特性的依赖性。科学家和设计人员在开发不同的混合PVT系统时,可以使用所提出的PVT混合系统有效性评估方法。

更新日期:2020-12-03
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