Performance Analysis on Solar Assisted CO₂ Vapor Compression Heat Pump Cycle with an Ejector

Abstract:

The thermodynamic performances of solar assisted CO₂ vapor compression heat pump cycles with an ejector are analyzed and compared with that of conventional CO₂ heat pump cycle (named as A cycle). Under the given working conditions, the COP of solar assisted CO₂ heat pump cycle with an ejector after compressor cycle (named as C cycle) is much higher than that of CO₂ heat pump cycle with an ejector before compressor cycle (named as B cycle) and that of the A cycle because of the lower compressor power of the C cycle. The compressor volume displacement of the C cycle demanded for providing the same heat capacity of gas-cooler is the lowest among the three cycles. So the compressor size of the C cycle is very small and the cost of the C cycle is very less. In the area having rich solar energy resource, it is significant to employ the C cycle for providing space heating by optimizing design ejector and selecting compressor, thus, the performances for this C cycle can be improved greatly. In the area not having rich solar energy resource, the B cycle can be used for providing space heating; the performances can also be improved accordingly.

• Periodical: Advanced Materials Research (Volume 741)
• Pages: 97-103
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.741.97
• Online since: August 2013
• Authors: Jia Hua Zhao, Jing Hong Ning
• Keywords: CO₂ Vapor Compression, Ejector, Heat Pump Cycle, Performance Analysis, Solar Assisted

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