Study on the Performance of Air Conditioning System Combining Heat Pipe and Vapor Compression Based on Ground Source Energy-Bus for Commercial buildings in north China

Abstract

After introducing the application status and problems of geothermal air conditioning system in China, a new kind of ground source air-conditioning system (EBCS) is put forward. The system consists of distributed air-conditioners combining heat pipe and vapor compression, fresh air handling unit with large enthalpy difference and ground source water loop. Geothermal energy is transported to the combined air-conditioners for heating and cooling by water loop. The combined air-conditioner can be operated at heat pump condition or heat pipe condition for air conditioning. In winter and transition season, the cooling energy in ground can be directly used for the cooling in inner zone by heat pipe mode, while the recovered heat is used for heating in peripheral zone. To analyze the performance of proposed system, a commercial building in north China has been taken as the research object, and the annual energy use is simulated. It is shown that the new system can save 21.7% energy compared to the traditional ground source heat pump system, and may be a potential air conditioning system for commercial buildings in north China.