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Performance analysis of Isopropanol–Acetone–Hydrogen chemical heat pump

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  • Guo, Jiangfeng
  • Huai, Xiulan
  • Li, Xunfeng
  • Xu, Mingtian

Abstract

The performance of an Isopropanol–Acetone–Hydrogen (IAH) chemical heat pump system is investigated in terms of enthalpy efficiency (COP) and exergy efficiency, in which the exothermic and endothermic reactions take place in the gas phase. The increase of reflux ratio, temperature of endothermic reaction and temperature of exothermic reaction reduces the performance of the heat pump when the other operating parameters remain unchanged. However, the performance of the IAH chemical heat pump improves with the increase of the ratio of molar quantity of hydrogen to that of acetone in the entry of exothermic reactor and the number of heat transfer units of regenerator. Generally, a better performance of the chemical heat pump corresponds to a larger number of trays in the distillation column. The performance of the system can be improved significantly after multi-parameter optimization design. The coefficient of performance (COP) pays more attention to the heat released from the exothermic reactor, while the exergy efficiency takes into consideration of both heat released from the exothermic reactor and temperature of exothermic reaction.

Suggested Citation

  • Guo, Jiangfeng & Huai, Xiulan & Li, Xunfeng & Xu, Mingtian, 2012. "Performance analysis of Isopropanol–Acetone–Hydrogen chemical heat pump," Applied Energy, Elsevier, vol. 93(C), pages 261-267.
    • Handle: RePEc:eee:appene:v:93:y:2012:i:c:p:261-267
    DOI: 10.1016/j.apenergy.2011.12.073
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    References listed on IDEAS

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    1. Blarke, Morten B., 2012. "Towards an intermittency-friendly energy system: Comparing electric boilers and heat pumps in distributed cogeneration," Applied Energy, Elsevier, vol. 91(1), pages 349-365.
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    Cited by:

    1. Jayasekara, Saliya & Halgamuge, Saman K., 2014. "A combined effect absorption chiller for enhanced performance of combined cooling heating and power systems," Applied Energy, Elsevier, vol. 127(C), pages 239-248.
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    3. Guo, Jiangfeng & Huai, Xiulan, 2012. "Optimization design of recuperator in a chemical heat pump system based on entransy dissipation theory," Energy, Elsevier, vol. 41(1), pages 335-343.
    4. Xu, Min & Cai, Jun & Guo, Jiangfeng & Huai, Xiulan & Liu, Zhigang & Zhang, Hang, 2017. "Technical and economic feasibility of the Isopropanol-Acetone-Hydrogen chemical heat pump based on a lab-scale prototype," Energy, Elsevier, vol. 139(C), pages 1030-1039.
    5. Mastronardo, E. & Bonaccorsi, L. & Kato, Y. & Piperopoulos, E. & Milone, C., 2016. "Efficiency improvement of heat storage materials for MgO/H2O/Mg(OH)2 chemical heat pumps," Applied Energy, Elsevier, vol. 162(C), pages 31-39.
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    7. Guo, Jiangfeng & Huai, Xiulan, 2012. "The application of entransy theory in optimization design of Isopropanol–Acetone–Hydrogen chemical heat pump," Energy, Elsevier, vol. 43(1), pages 355-360.

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