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Exergy-method analysis of a two-stage vapour-compression refrigeration-plants performance

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  • Nikolaidis, C.
  • Probert, D.

Abstract

The behaviour of two-stage compound compression-cycle, with flash intercooling, using refrigerant R22, has been investigated by the exergy method. The condenser's saturation-temperature was varied from 298 to 308 K and the evaporator's saturation-temperature from 238 to 228 K. The effects of temperature changes in the condenser and evaporator on the plant's irreversibility rate were determined. The greater the temperature difference between either (i) the condenser and the environment, or (ii) the evaporator and the cold room, the higher the irreversibility rate. Any reduction in the irreversibility rate of the condenser gives approximately 2.40 times greater reduction in the irreversibility rate for the whole plant, and any reduction in the evaporator's irreversibility rate gives a 2.87 times greater mean reduction in the irreversibility rate of the whole plant. Because the changes in the temperatures in the condenser and the evaporator contribute so significantly to the plant's overall irreversibility, there is considerable scope for optimising the conditions imposed upon the condenser and evaporator.

Suggested Citation

  • Nikolaidis, C. & Probert, D., 1998. "Exergy-method analysis of a two-stage vapour-compression refrigeration-plants performance," Applied Energy, Elsevier, vol. 60(4), pages 241-256, August.
    • Handle: RePEc:eee:appene:v:60:y:1998:i:4:p:241-256
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    Cited by:

    1. Jain, Vaibhav & Sachdeva, Gulshan & Kachhwaha, S.S., 2015. "Thermodynamic modelling and parametric study of a low temperature vapour compression-absorption system based on modified Gouy-Stodola equation," Energy, Elsevier, vol. 79(C), pages 407-418.
    2. He, Yueer & Liu, Meng & Kvan, Thomas & Yan, Lu, 2019. "A quantity-quality-based optimization method for indoor thermal environment design," Energy, Elsevier, vol. 170(C), pages 1261-1278.
    3. Keshtkar, Mohammad Mehdi & Talebizadeh, Pouyan, 2017. "Multi-objective optimization of cooling water package based on 3E analysis: A case study," Energy, Elsevier, vol. 134(C), pages 840-849.
    4. Gazda, Wiesław, 2013. "Application possibilities of the strategies of the air blast–cryogenic cooling process," Energy, Elsevier, vol. 62(C), pages 113-119.
    5. Wang, Jijin & Qv, Dehu & Yao, Yang & Ni, Long, 2021. "The difference between vapor injection cycle with flash tank and intermediate heat exchanger for air source heat pump: An experimental and theoretical study," Energy, Elsevier, vol. 221(C).

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