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Performance comparison and analysis of a combined power and cooling system based on organic Rankine cycle

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Abstract

A novel power and cooling system combined system which coupled organic Rankine cycle (ORC) with vapor compression refrigeration cycle (VCRC) was proposed. R245fa and butane were selected as the working fluid for the power and refrigeration cycle, respectively. A performance comparison and analysis for the combined system was presented. The results show that dual-pressure ORC-VCRC system can achieve an increase of 7.1% in thermal efficiency and 6.7% in exergy efficiency than that of basic ORC-VCRC. Intermediate pressure is a key parameter to both net power and exergy efficiency of dual-pressure ORC-VCRC system. Combined system can produce maximum net power and exergy efficiency at 0.85 MPa for intermediate pressure and 2.4 MPa for high pressure, respectively. However, superheated temperature at expander inlet has little impact on the two indicators. It can achieve higher overall COP, net power and exergy efficiency at smaller difference between condensation temperature and evaporation temperature of VCRC.

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Authors and Affiliations

  1. Institute of Mechanical Engineering, Xiangtan University, Xiangtan, 411105, China

    Zhi-qi Wang  (王志奇), Qi-yu Zhou  (周奇遇), Xiao-xia Xia  (夏小霞), Bin Liu  (刘斌) & Xin Zhang  (张欣)

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  1. Zhi-qi Wang  (王志奇)
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  2. Qi-yu Zhou  (周奇遇)
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  3. Xiao-xia Xia  (夏小霞)
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  4. Bin Liu  (刘斌)
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  5. Xin Zhang  (张欣)
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Corresponding author

Correspondence to Zhi-qi Wang  (王志奇).

Additional information

Foundation item: Project(12C0379) supported by the Scientific Research Fund of Hunan Province, China; Project(13QDZ04) supported by the Scientific Research Foundation for Doctors of Xiangtan University, China

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Wang, Zq., Zhou, Qy., Xia, Xx. et al. Performance comparison and analysis of a combined power and cooling system based on organic Rankine cycle. J. Cent. South Univ. 24, 353–359 (2017). https://doi.org/10.1007/s11771-017-3437-5

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  • DOI: https://doi.org/10.1007/s11771-017-3437-5

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