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Study on all-weather solar-absorption/compression hybrid refrigeration system.

Number: pap. L09

Author(s) : FU W., WANG L.

Summary

The conventional air-source compression refrigeration system with air-cooled condenser has lower COP and higher energy consumption as the outdoor temperature increases. The absorption refrigeration system driven by solar energy can contribute to saving fossil fuel and electric power, but its cooling ability is limited by heat source temperature, hardly making qualified cooling water. Aimed at above-mentioned issues, an all-weather solar-absorption/compression hybrid refrigeration system was proposed. It consists of a solar-driven LiBr absorption refrigeration unit and an electricity-powered vapor compression refrigeration unit. The electricity-powered vapor compression refrigeration unit is composed of two vapor compression refrigeration cycles, which contain dual compressors, dual (coolant/air-cooled) condensers and one evaporator. One compressor is connected with the coolant evaporative-condenser, while another compressor is connected with the air-cooled condenser, and then two passages are in parallel. Thus, the novel system can meet the requirement of all-weather cooling for the air-conditioning rooms. A routine written by VC++ has been coded to evaluate the performance of the system. A real building is taken as the air-conditioning building where the system is used as the cold source of the air-conditioning system. The routine is mainly for thermodynamic calculation, and the analysis of the building cold load has been processed by DeST software. Five typical cities in China namely Zhengzhou, Wuhan, Beijing, Shanghai, Xi’an have been chosen, and the energy consumption of the whole cooling season is calculated. It indicates that, as compared to the conventional air-cooled compression refrigeration system, in Zhengzhou, Wuhan, Shanghai, Beijing, Xi’an, the system can get energy-saving rate of 26.7%, 22.9%, 20.7%, 22.4% and 29.6% respectively.

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Pages: 16

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Details

  • Original title: Study on all-weather solar-absorption/compression hybrid refrigeration system.
  • Record ID : 30022039
  • Languages: English
  • Source: 8th international conference on compressors and refrigeration, 2017.
  • Publication date: 2017/07/20

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