The Influence from the Return Water Temperature of Condenser on the Unit and System COP of the Cold-Water Screw Unit Used on Cold Storage

Abstract:

The mathematical models of the storage refrigeration system of cold-water screw unit has been established.The operating condition of the unit and the system which working at partial load has been simulated,with different return water temperature of condenser.The influence from the return water temperature of condenser on the COP of the unit and system on the condition of different capacity of compressor has been analyzed, when the evaporation temperature is -10°C.The fact that it’s better to use start and stop operation with upload and download step by step rather than operate on the condition of low capacity of compressor, and that it’s beneficial for systemic energy conservation to use the variable frequency pump have been concluded.

• Periodical: Advanced Materials Research (Volumes 953-954)
• Pages: 1449-1453
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.953-954.1449
• Online since: June 2014
• Authors: Zhao Lei Ding*, Chang Feng Zhang, Yun Fei Xu
• Keywords: Cold Storage, COP, Partial Load, Return Water Temperature of Condenser, Screw Unit, Simulation

References

[1] Long Fu , Guoliang Ding , Zujian Su , Guoquan Zhao. Steady-state simulation of screw liquid chillers. Applied Thermal Engineering , 2002, 22: 1731–1748.

DOI: 10.1016/s1359-4311(02)00084-4

[2] Babak Solati, Radu Zmeureanu , Fariborz Haghighat. Correlation based models for the simulation of energy performance of screw chillers. Energy Conversion and Management , 2003, 44 : 1903–(1920).

DOI: 10.1016/s0196-8904(02)00233-9

[3] C V Le, P K Bansal, J D Tedford: Institution of Mechanical Engineers. vol. 219 (2005), p.95.

[4] Jinghui Liu, Qinggang Li, Fazhong Wang, Lei Zhou. A new model of screw compressor for refrigeration system simulation. INTTERNATIONAL JOURNAL OF REFRIGERATION, 2012, 35: 861-870.

DOI: 10.1016/j.ijrefrig.2012.01.016