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首页> 外文期刊>International journal of green energy >THE THEORETICAL MODELLING AND OPTIMIZATION OF A 10 KW_P PHOTOVOLTAIC THERMAL SYSTEM FOR A STUDENT HOSTEL IN SINGAPORE
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THE THEORETICAL MODELLING AND OPTIMIZATION OF A 10 KW_P PHOTOVOLTAIC THERMAL SYSTEM FOR A STUDENT HOSTEL IN SINGAPORE

机译：新加坡学生宿舍的10 KW_P光伏热系统的理论建模和优化

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Current commercial photovoltaic (PV) conversion efficiency {flat plate modules) is about 6-20%, depending on the materials used for the module construction. Since only a small fraction (＜10%) of the incident solar energy is reflected and/or transmitted, a large fraction of the solar radiation is converted into heat. If this heat can he harvested as well, the overall energy efficiency of such an integrated photovoltaic thermal (PVT) hybrid system will be greatly improved. At the same time, pumping water through the PV modules will cool (if T_(water)＜ T_(module) the solar cells and improve their electricity production efficiency. This article describes the design and numerical simulation of a PVT system for producing electricity and hot water in a student hostel in Singapore. The nominal electrical power output is 10 kW_p (kilowatt peak). Thermal models were developed based on basic energy balance equations and average climatic conditions for Singapore over a typical year were used. A survey of the hot water usage pattern over a typical week was carried out and used in the simulation. The optimum mass flow rate in the collectors is found to be 0.039 kg/ (s m~2) and the optimum storage tank capacity for hot water is 2500 kg for a showering load of around 6000 kg/day. The average thermal and electrical efficiency of the system are 43% and 12%, respectively. The requirement of auxiliary electric energy for water heating is predicted to be reduced by 94%.
机译：当前的商用光伏（PV）转换效率（平板模块）大约为6-20％，具体取决于模块构造所使用的材料。由于只有一小部分（＜10％）的入射太阳能被反射和/或透射，因此大部分的太阳辐射会转化为热量。如果也可以收集这些热量，那么这种集成的光伏热（PVT）混合系统的整体能源效率将大大提高。同时，通过PV组件抽水将冷却（如果T_（水）＜T_（组件）太阳能电池并提高其发电效率），本文介绍了用于发电和发电的PVT系统的设计和数值模拟。新加坡某学生旅馆的热水，标称电力输出为10 kW_p（千瓦峰值），根据基本能量平衡方程式开发了热模型，并使用了新加坡典型年份的平均气候条件。在一个典型的星期内进行了用水模式的模拟，结果表明收集器的最佳质量流量为0.039 kg /（sm〜2），热水的最佳储水容量为2500 kg。淋浴负荷约为6000千克/天，系统的平均热效率和电效率分别为43％和12％，预计用于热水的辅助电能需求将减少94％。

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