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The selection of volume ratio of two-stage rotary compressor and its effects on air-to-water heat pump with flash tank cycle

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  • Ko, Younghwan
  • Park, Sangkyoung
  • Jin, Simon
  • Kim, Byungsoon
  • Jeong, Ji Hwan

Abstract

A conventional heat pump exhibits performance degradation even though larger heating capacity is needed as the outdoor temperature declines. As a way to prevent the performance degradation, a heat pump with an inverter-driven two-stage rotary compressor and vapor injection (VI) cycle was investigated for an air-to-water heat pump (AWHP) system employing a flash tank. The volume ratio of two cylinder of a two-stage rotary compressor has significant effect on the performance of the AWHP so that it was experimentally investigated. Based on this result, a two-stage rotary compressor designed with an optimized volume ratio was manufactured and incorporated into the AWHP system. It was found that the VI AWHP system improved the heating capacity by 48% and the COP by 36% compared to those values for the conventional AWHP at water temperature of 60°C and ambient temperature of −15°C. This VI AWHP system can be used for cold climate applications.

Suggested Citation

  • Ko, Younghwan & Park, Sangkyoung & Jin, Simon & Kim, Byungsoon & Jeong, Ji Hwan, 2013. "The selection of volume ratio of two-stage rotary compressor and its effects on air-to-water heat pump with flash tank cycle," Applied Energy, Elsevier, vol. 104(C), pages 187-196.
    • Handle: RePEc:eee:appene:v:104:y:2013:i:c:p:187-196
    DOI: 10.1016/j.apenergy.2012.11.021
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    References listed on IDEAS

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    1. Ma, Guo-yuan & Chai, Qin-hu, 2004. "Characteristics of an improved heat-pump cycle for cold regions," Applied Energy, Elsevier, vol. 77(3), pages 235-247, March.
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    Cited by:

    1. Park, Young Sung & Jeong, Ji Hwan & Ahn, Byoung Ha, 2014. "Heat pump control method based on direct measurement of evaporation pressure to improve energy efficiency and indoor air temperature stability at a low cooling load condition," Applied Energy, Elsevier, vol. 132(C), pages 99-107.
    2. Wang, Wenyi & Li, Yaoyu, 2019. "Intermediate pressure optimization for two-stage air-source heat pump with flash tank cycle vapor injection via extremum seeking," Applied Energy, Elsevier, vol. 238(C), pages 612-626.
    3. Zhang, Yongyu & Gao, Ran & Si, Pengfei & Shi, Lijun & Shang, Yinghui & Wang, Yi & Liu, Boran & Du, Xueqing & Zhao, Kejie & Li, Angui, 2023. "Study on performances of heat-oxygen coupling device for high-altitude environments," Energy, Elsevier, vol. 272(C).
    4. Sun, Fangtian & Fu, Lin & Sun, Jian & Zhang, Shigang, 2014. "A new ejector heat exchanger based on an ejector heat pump and a water-to-water heat exchanger," Applied Energy, Elsevier, vol. 121(C), pages 245-251.
    5. Kofi Owura Amoabeng & Kwang Ho Lee & Jong Min Choi, 2019. "Modeling and Simulation Performance Evaluation of a Proposed Calorimeter for Testing a Heat Pump System," Energies, MDPI, vol. 12(23), pages 1-22, December.
    6. Bianchi, Giuseppe & Cipollone, Roberto, 2015. "Theoretical modeling and experimental investigations for the improvement of the mechanical efficiency in sliding vane rotary compressors," Applied Energy, Elsevier, vol. 142(C), pages 95-107.
    7. Zhang, Long & Jiang, Yiqiang & Dong, Jiankai & Yao, Yang, 2018. "Advances in vapor compression air source heat pump system in cold regions: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 353-365.
    8. Zhiping Zhang & Hongye Qiu & Dantong Li & Zhilong He & Ziwen Xing & Lijian Wu, 2022. "Development of Ultra-High-Efficiency Medium-Capacity Chillers with Two-Stage Compression and Interstage Vapor Injection Technologies," Energies, MDPI, vol. 15(24), pages 1-19, December.
    9. Yao, Jian & Zheng, Sihang & Chen, Daochuan & Dai, Yanjun & Huang, Mingjun, 2021. "Performance improvement of vapor-injection heat pump system by employing PVT collector/evaporator for residential heating in cold climate region," Energy, Elsevier, vol. 219(C).
    10. Poppi, Stefano & Bales, Chris & Heinz, Andreas & Hengel, Franz & Chèze, David & Mojic, Igor & Cialani, Catia, 2016. "Analysis of system improvements in solar thermal and air source heat pump combisystems," Applied Energy, Elsevier, vol. 173(C), pages 606-623.
    11. Wang, Yubo & Quan, Zhenhua & Zhao, Yaohua & Wang, Lincheng & Liu, Zichu, 2022. "Performance and optimization of a novel solar-air source heat pump building energy supply system with energy storage," Applied Energy, Elsevier, vol. 324(C).

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