Heat Transfer in a glass evacuated tube solar collector

초록

The thermal performance of a glass evacuated tube solar collector is numerically investigated. The glass evacuated tube solar collector consists of a two-layed glass tube and a copper tube. The air is used as a working fluid. The length and the diameter of the glass tube are 1,200mm and 37mm, respectively. The diameter, the thickness, and the length of the copper tube are considered as important design parameters of the collector and the effects of these on the performance of the collector are studied. It is known that the diameter and the length of the copper tube affect the performance of the collector significantly. In order to improve the performance of the collector, a finned tube is suggested. The results show that the performance of the suggested collector is 56.5 higher than that of the collector without fins.