Experimental analysis of a vapor compression refrigeration cycle with heat pipe

Abstract

This study focuses on the integration of a thermosyphon-type loop heat pipe into a vapor compression refrigeration cycle that operates a crane cabin air conditioner with a refrigeration capacity of 20 kW. The evaporator of the heat pipe is incorporated into the line between the compressor outlet and the condenser inlet of the vapor compression cycle. In addition, the condenser of the heat pipe is placed above the existing condenser. The heat pipe extracts heat from the hot R450A refrigerant exiting the compressor, reducing the refrigerant's temperature and, consequently, alleviating a portion of the condenser load from the existing system. Decreased load on the condenser reduces the saturation temperature. The impact of the heat pipe on the crane's air conditioning system was experimentally investigated. When the heat pipe is activated, the condensation temperature in the system is adjusted on the basis of the ambient temperature, allowing for a thorough examination of the heat pipe's effects on the system. According to the results of this study, it was concluded that the refrigeration capacity and COP values increased in the heat pipe case under the same operating conditions. In addition, when using a heat pipe, there are fewer CO2 emissions released into the environment. It is possible to reduce emissions from energy consumption and increase energy efficiency by using a heat pipe in the vapor compression refrigeration system.