Thermal Performance Analyses of Heat Pipe of All-Glass Evacuated Tubular Solar Collectors with Properties of Pipe Materials

Abstract

In this paper, the abio-superconductor heat pipe is used as heat transfer tube of all-glass of evacuated tubular solar collectors. Based on thermal analysis, the overall heat loss coefficient , the efficiency factor and the heat removal factor of superconductor heat pipe evacuated tubular collector are presented. They were compared with instantaneous efficiency between theory value of example and measure value of experiment. As a result, their opposite error less than 5.3%, it explained related calculation expression that it reflected preferably transmit heat function and characteristics of vacuum tube solar collector .It discussed how to prove collector performance and used for that type of vacuum tube of the design and the performance forecast. The heat pipe catheter contains a small amount of powder of the working medium, these media consists of a variety of inorganic elements. The properties of pipe materials can be in a very short time to achieve isothermal heat transfer, as its radial heat transfer capacity of 44 kW/m2, axial heat transfer capacity is 8600 kW/m2,heat pipe can transfer more compared with the normal.