??????????????????????????????????????????????????????????????????????????????????????? PV/T

Abstract

This research aims to increase the heat transfer capacity in the water flow channels in PV/T panels in order to increase the performance of the PV/T panels. The study used water flow channels with an inclined rectangular cross section. Angle of 7 degrees to the horizontal In the channel there is a baffle that divides the flow channel into 5 parallel channels, and at the bottom of the flow channel there is a water-air filling hole. The effect of the volumetric ratio of air and water at conditions ? = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 and 0.8 was studied. At water flow rate conditions of 3, 6, and 9 liters per minute (Re = 200, 400, and 600), and flow-blocking fins were installed on the top surface of the flow channel. For the study of heat transfer, an infrared camera is used to measure the temperature on a surface with a constant heat flux, and a pressure measuring device measures the pressure loss in the flow channel. and record the flow of air bubbles with a video camera. It is a guideline and draws conclusions for increasing efficiency. Inside future solar panels By the experimental results of This research can be summarized as follows. From the results of the study, the following conclusions can be drawn. Adding air bubbles into the water can help. The heat transfer on the surface was clearly increased. It was found that installing a 60? V-shaped flow fin in the case of ? = 0.5 at Re = 400 increased the average heat transfer value by approximately 19 times. Compared to the case without adding air bubbles Compared with the heat transfer value of ? and other fin shapesThe value of the friction factor when installing the fins to block the flow at an angle of 60? in the case of ? = 0.0 to 0.7 at Re = 400 tends to increase compared to the case of ? = 0.1. The value of the friction factor in the case of ? = 0.7 has The trend increases by 2.5 times compared to the case of ? and other fin shapes.The thermal performance values when installing the 60? V-shaped flow-blocking fins tend to increase accordingly. Increasing the value of ?, which was found at ? = 0.5 at Re = 400, gave the highest thermal performance value, approximately 19 times compared to the case with ? and other fin shapes.

????????????????????????????????????????????????????????????????????????????????? PV/T ?????????????????????????? PV/T ?????????????????????????????????????????????????????????????????????? 7 ??????????????? ????????????????????????????????????? 5 ?????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????? ? = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 ??? 0.8 ??????????????????????????????????? 3, 6 ??? 9 ??????????? (Re = 200, 400 ??? 600) ???????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ??????????????????????????????????????????? ??????????????????????????????????????????? ?????????????????????????????? ???????????????? ???????????????????????????????????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????? ????? ???????????????????????????????? 60? ???? ? = 0.5 ??? Re = 400 ?????????????????????????????????????????????????? 19 ??????????????????????????????? ???????????????????????????????????? ? ?????????????????? ??????????????????????????????????????????????????????????????? 60? ???? ? = 0.0 ??? 0.7 ??? Re = 400 ???? ??????????????????????????????????? ? = 0.1 ??????????????????????????????? ? = 0.7 ???????????????????????? 2.5 ???????????????????????? ? ??????????????????????????????????????????????????????????????????????????????? 60? ????????????????????? ?????????????????? ? ????????? ?????? ? = 0.5 ??? Re = 400 ??????????????????????????????? ?????? 19 ???? ???????????????????? ? ??????????????????