Study On Absorption Refrigeration System Based On Parabolic Trough Solar Collector

As a renewable clean energy,solar energy is the best energy for mankind to solve the environmental problems.In the solar thermal utilization technology,the solar air conditioning is well matched with the season,and the solar energy can be maximized.Based on the National Natural Science Foundation of China,this paper studied the absorption refrigeration system based on parabolic trough solar collector in the background of sustainable energy development.Firstly,this paper puts forward the double effect LiBr-H₂O absorption chiller system driven by parabolic trough solar collector.The operation mode of the system in one day is analyzed.The mathematical models of parabolic trough solar collector,steam type double effect LiBr-H₂O absorption chiller and heat exchanger are established and verified.Secondly,The influence of solar radiation intensity,wind speed,medium inlet temperature and medium velocity on the performance of trough solar collector is studied,and the influence of steam flow rate on the performance of steam absorption chiller is studied.Taking a hotel building as an example,the parameter design of the trough solar air conditioning system is carried out,and the operation of the thermal operation performance of the system is analyzed.At last,the applicability of the trough solar air-conditioning system is studied.The system is applied to the different buildings in different regions,and the performance of the system is compared.The evaluation structure of engineering economy is put forward.Taking an office building as an example,the life cycle annual cost of the trough solar air-conditioning system and the direct fired absorption air-conditioning system is compared,and the economic performance of each system is analyzed.