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Improvement of refrigeration/air-conditioning performance with mechanical sub-cooling

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  • Zubair, Syed M.

Abstract

Significant amounts of energy are consumed by refrigeration/air-conditioning systems. An energy-saving approach that can be applied to new or existing refrigeration/air-conditioning installations is discussed to increase system performance and reduce energy consumption. It consists of adding a mechanical subcooling loop to a conventional vapor-compression cycle. The performance of a modified system is demonstrated for three different applications. It was found that the system performance peaks at a sub-cooler saturation temperature midway between the condensing and evaporating temperatures. Simulations show that performance improvement for air-conditioning systems can be as high as 20% during peak periods of high condensing temperatures whereas high-temperature and low-temperature refrigeration systems under these same conditions will provide energy-savings of 20 and 40%, respectively.

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  • Zubair, Syed M., 1990. "Improvement of refrigeration/air-conditioning performance with mechanical sub-cooling," Energy, Elsevier, vol. 15(5), pages 427-433.
    • Handle: RePEc:eee:energy:v:15:y:1990:i:5:p:427-433
    DOI: 10.1016/0360-5442(90)90039-5
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    Cited by:

    1. Song, Zhiying & Ji, Jie & Zhang, Yuzhe & Cai, Jingyong, 2023. "Numerical exploration and experimental validation of a tri-generation heat pump system in cooling mode," Energy, Elsevier, vol. 273(C).
    2. Yilmaz, Tuncay & Erdinç, Mehmet Tahir, 2019. "Energetic and exergetic investigation of a novel refrigeration system utilizing ejector integrated subcooling using different refrigerants," Energy, Elsevier, vol. 168(C), pages 712-727.
    3. Qureshi, Bilal Ahmed & Zubair, Syed M., 2012. "The impact of fouling on performance of a vapor compression refrigeration system with integrated mechanical sub-cooling system," Applied Energy, Elsevier, vol. 92(C), pages 750-762.
    4. Qureshi, Bilal A. & Inam, Muhammad & Antar, Mohamed A. & Zubair, Syed M., 2013. "Experimental energetic analysis of a vapor compression refrigeration system with dedicated mechanical sub-cooling," Applied Energy, Elsevier, vol. 102(C), pages 1035-1041.
    5. 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.
    6. Kojok, Farah & Fardoun, Farouk & Younes, Rafic & Outbib, Rachid, 2016. "Hybrid cooling systems: A review and an optimized selection scheme," Renewable and Sustainable Energy Reviews, Elsevier, vol. 65(C), pages 57-80.
    7. Liang, Cai-Hang & Zhang, Li-Zhi & Pei, Li-Xia, 2010. "Performance analysis of a direct expansion air dehumidification system combined with membrane-based total heat recovery," Energy, Elsevier, vol. 35(9), pages 3891-3901.

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