Studying On Compound Working Mode And Characteristic Of The Ground Source-air Double Resources Heat-Pump

The energy shortage and environmental pollution have becoming more and more seriously, Becoming the two prominent problem which stricting the sustainable development of society and economy in our country, Causing more concern by the government, So energy saving and emission reduction becomes Paramount in today's society. With the improvement of people's living standard, The building energy consumption which is constituted by air heating energy consumption has more proportion of the society energy consumption, thus energy saving is particularly important of the HVAC area. In recent years, the complex source heat pump system get a lot of attention for the comprehensive utilization of energy superiority and the high efficiency of the operation efficiency by researchers.Operation performance of the single air source heat pump under the influence of the outdoor air temperature,In the winter low temperature and summer high temperature environment, the heating capacity or refrigeration capacity decrease sharply and the efficiency of heat pump system fall obviously. In order to relieve the problem of low efficiency of heat pump system in adverse circumstance, this paper put forward a compound heat pump system with double heat sources-air source and ground source,Through the outdoor heat exchanger inosculate the single air source heat pump and the ground-source heat pump. This system can adjust the system working mode flexiblly according to the outdoor environment temperature and local actual condition, Make heat pump system working in single air source mode, the air-ground source compound heat source mode and the single water source mode respectively. The conversion of the three kinds of working mode, alleviate the low efficiency present situation of the single air source heat pump system when working in harsh environment and large water and power consumption and longer buried tube of single ground source heat pump system. guaranter the efficiency,rationality and economy when system in use.We adopt theory integate with experiment method in this paper, Through the air -ground source double resources heat pump experiment platform, testing the operation performance of the heat pump system in different environmental temperature,According the experiment get the system characteristics when the system in complex heat resource working mode, heat system in different environmental temperature appropriate working mode,determine appropriate working mode under the different environmental temperature.Experiment shows that the performance of the system when working in effective composite resource mode is more better than in a single air source mode,through the analysis of experimental results,obtaine the reasonable working mode in different environmental temperature.Winter,when the air temperature is higher than 2 degree,adopt the single air source mode; when the air temperature scope is -5～2 degree,adopt air-ground source compound heat source mode;when the air temperature is lower than -5 degree , adopt the single water source mode. Selective diversification of the air-ground source compound heat pump work mode ,have further to expand scope of application of the system.It can provide the academic and experimental reference for design and optimization of this series thermal compound heat pump.