PTC와 평판형 태양열집열기의 성능평가 비교 연구

Abstract

Solar collectors to be applied are mainly flat-plate or vacuum tube collector which is used for hot water supply of house because of low heat value and low temperature. There are a necessity to expand applicable scope of solar collector into the industrial process heat source and air conditioner for coping with renewable energy policy of government and industrial trend. This study is to analysis the performance of PTC solar collector of concentrating type and flat-plate of non-concentrating. For this, temperature difference and heating value as insolation of air outside is measured from these two collectors mounted on 2-axial solar tracking system. It is investigated that temperature profile obtained from PTC solar collector is uniform and collecting heat per unit area is 6.8kcal/m2min which is about 3 times with compare to flat-plate collector of 2kcal/m2min. Also the amount of heat to be produced from PTC solar collector is 3 Mcal/m2 which is about 2 times with compare to flat-plate collector of 1.5Mcal/m2 as a result of operating these two collectors during one month. Therefore, it is obtained that heat collecting performance of PTC solar collector is superior to flat-plate.