ผลของการระบายความร้อนโดยใช้เซลล์เทอร์โมอิเล็กตริกที่มีต่อประสิทธิภาพของเซลล์สุริยะ ที่ใช้ร่วมกับระบบรวมแสง

Abstract

Effect of ventilation via thermoelectric cells on conversion efficiency of solar cells with concentration system was conducted. The thermoelectric cells were fabricated to different ventilation objects to compare the ventilation performance with typical reference ventilation systems. The experimental group for testing their ventilation performance was divided into 6 systems. System 1 was directly ventilated heat from a compatible solar cell (a slide glass) to air surrounding. System 2 was ventilated heat from a compatible solar cell via a fan. System 3 was ventilated heat from a compatible solar cell via the thermoelectric cell that fabricated to a fan. System 4 was ventilated heat from a compatible solar cell via an aluminum fin. System 5 was ventilated heat from a compatible solar cell via the thermoelectric cell that fabricated to an aluminum fin. System 6 was ventilated heat from a compatible solar cell via the thermoelectric cell that fabricated to a fan and an aluminum fin. The first part of experiment, to find the best ventilation system in terms of the temperature difference between the upper and the lower of  compatible solar cells, the light from 1000 W spotlight bulk was exposed onto a compatible solar cell via the concentrating Fresnel lens under the STC. The result of temperature differences between the upper and the lower of compatible solar cells from the system1 to system 6 were
41.49 ºC, 50.00 ºC, 53.06 ºC, 60.42 ºC, 69.96 ºC and 91.82 ºC respectively. It obviously seen that the system6 was shown the best ventilation performance compare with another ones. The second part of experiment, the outdoor test, the best ventilation system was employed to attach to the 5.5 mm x 5.5 mm multi-junction solar cell incorporate to 500x Fresnel lens and two-axis sun tracker for a conversion efficiency determination of this solar cell. The result of average temperature difference between the upper and the lower of multi-junction solar cell was 321.72 ºC. The conversion efficiency of multi-junction solar cell was 15.18 %. The correlation coefficient (R²) between average temperature difference of the upper and the lower of multi-junction solar cell and the conversion efficiency of this cell was 0.8746. It was presented that the ventilation performance of the ventilation system strongly effected on the solar cell efficiency.