Abstract

Storage-type solar PV/thermal hybrid system added a water tank below the PV panel directly is to cool the surface of PV chip and reuse the waste heat. Solar test equipment was set up to adjust irradiation amount of halogen lamp to light on solar PV board and measure the I-V curves of the PV panel simultaneously. Surface temperature of PV panel and water temperature of water tank are measured respectively by infrared thermal imager and thermocouples. By altering the irradiation of 600~900W/m 2 at a 30° inclination angle of PV panel, the experience data of storage-type solar PV/thermal hybrid system can be got, total efficiency transformed by photovoltaic efficiency and hot water efficiency of PV/thermal hybrid system can be analyzed. The results show that total efficiency of storage-type solar PV/thermal hybrid system is more excellent as compared to the pure photovoltaic efficiency. The hot water efficiency of PV/thermal hybrid system from recycling waste heat gets 38~40%. If the electric/heat energy conversion efficiency is about 0.38, total efficiency transformed obtains more efficiency about 14~15% from the recycling the waste heat. The total efficiency of storage-type solar PV/thermal hybrid system is almost 4 times than photovoltaic efficiency in experimental surrounding.

Highlights

  • Solar PV panel has been considered as the best renewable among the developable energy

  • Storage-type solar PV/thermal hybrid system is set up to cool the surface of PV chip and reuse the waste heat

  • The result makes sure that the photovoltaic efficiency of PV panel can maintain in the storage-type solar PV/thermal hybrid system

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Summary

Introduction

Solar PV panel has been considered as the best renewable among the developable energy. When solar PV panel is shined, the surface temperature of solar PV panel is increased. Solenki et al [1~2] set up a V-trough PV module to let the reflected lights fall on the PV panel inside the V-trough PV module to get its efficiency. The efficiency of 10.57% in normal solar PV panel can be measured at the sunlight amount of 750W/m2, while the efficiency of 17.1% in V-trough PV module can be presented. Akbarzadeh and Wadowski [3] set up a cooling PV chip system, which focused sunlight with its reflector and cool down the surface temperature of the chip with cooling fins and heat pipes in the back of the PV chip. The surface temperature of the chip decreased 20 °C, and the output power increased 10W

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