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Development of high efficiency cycles for domestic refrigerator-freezer application

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  • Yang, Mina
  • Jung, Chung Woo
  • Kang, Yong Tae

Abstract

High efficiency 2-stage vapor compression cycles are developed for domestic refrigerator-freezer application. From the parametric analysis of the newly developed cycles, it is recommended that evaporators be connected in series while compressors be connected in parallel to obtain the highest COP (coefficient of performance) in domestic refrigerator-freezer systems. It is found that the most important parameter for performance improvement is the freezing load ratio (RQ˙F=Q˙F/Q˙total). It is also found that the degree of subcooling by the heat exchanger (ΔTsub=T2−T3) gives the most significant effect on m˙total. However, there are some difficulties in operating the newly developed cycle such as difficult individual operation of the evaporators. Therefore, this study proposes an advanced novel cycle with the evaporators connected in parallel and without the separator, which is named “two-circuit cycle with evaporating subcooler”. It is finally concluded that the refrigerants pair of (R/F) = (R152a/R600a) be the best candidate with the highest COP of 3.758 for the two-circuit cycle with evaporating subcooler.

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  • Yang, Mina & Jung, Chung Woo & Kang, Yong Tae, 2015. "Development of high efficiency cycles for domestic refrigerator-freezer application," Energy, Elsevier, vol. 93(P2), pages 2258-2266.
    • Handle: RePEc:eee:energy:v:93:y:2015:i:p2:p:2258-2266
    DOI: 10.1016/j.energy.2015.10.127
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    References listed on IDEAS

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    Cited by:

    1. Fang, Zhongcheng & Fan, Chaochao & Yan, Gang & Yu, Jianlin, 2019. "Performance evaluation of a modified refrigeration cycle with parallel compression for refrigerator-freezer applications," Energy, Elsevier, vol. 188(C).
    2. Elakhdar, M. & Tashtoush, B.M. & Nehdi, E. & Kairouani, L., 2018. "Thermodynamic analysis of a novel Ejector Enhanced Vapor Compression Refrigeration (EEVCR) cycle," Energy, Elsevier, vol. 163(C), pages 1217-1230.
    3. Jeon, Yongseok & Kim, Dongwoo & Jung, Jongho & Jang, Dong Soo & Kim, Yongchan, 2018. "Comparative performance evaluation of conventional and condenser outlet split ejector-based domestic refrigerator-freezers using R600a," Energy, Elsevier, vol. 161(C), pages 1085-1095.
    4. Yongseok Jeon & Hoon Kim & Jae Hwan Ahn & Sanghoon Kim, 2020. "Effects of Nozzle Exit Position on Condenser Outlet Split Ejector-Based R600a Household Refrigeration Cycle," Energies, MDPI, vol. 13(19), pages 1-12, October.

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