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The application of entransy theory in optimization design of Isopropanol–Acetone–Hydrogen chemical heat pump

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  • Guo, Jiangfeng
  • Huai, Xiulan

Abstract

In the present work, a multi-parameter optimization approach of Isopropanol–Acetone–Hydrogen (IAH) chemical heat pump is developed based on the entransy theory. In the optimization process, the total low-temperature heat consumed by the heat pump system generally decreases while the high-temperature heat recovered by the heat pump increases remarkably. When the temperatures of the reboiler and endothermic reaction are fixed, the temperature of exothermic reaction in the optimal design scheme is larger than that in the initial design scheme, and the high-temperature heat released from the exothermic reactor increases significantly in the optimal design scheme. The enthalpy efficiency (COP) and exergy efficiency monotonously increase as the entransy efficiency increases in the optimization process. The entransy efficiency has a definite physical meaning and pays more attention to the quality of the high-temperature heat recovered by the heat pump than enthalpy efficiency; it does not introduce an additional parameter and has more succinct expression than exergy efficiency. The multi-parameter optimization approach taking entransy efficiency as the objective function is very effective in the optimization design of IAH chemical heat pump.

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  • 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.
    • Handle: RePEc:eee:energy:v:43:y:2012:i:1:p:355-360
    DOI: 10.1016/j.energy.2012.04.018
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    References listed on IDEAS

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    1. 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.
    2. 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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    4. Xu, Mingtian, 2011. "The thermodynamic basis of entransy and entransy dissipation," Energy, Elsevier, vol. 36(7), pages 4272-4277.
    5. Chen, Qun & Wang, Moran & Pan, Ning & Guo, Zeng-Yuan, 2009. "Optimization principles for convective heat transfer," Energy, Elsevier, vol. 34(9), pages 1199-1206.
    6. Chung, Yonsoo & Kim, Beom-Jae & Yeo, Yeong-Koo & Song, Hyung Keun, 1997. "Optimal design of a chemical heat pump using the 2-propanol/acetone/hydrogen system," Energy, Elsevier, vol. 22(5), pages 525-536.
    7. Demir, Hasan & Mobedi, Moghtada & Ülkü, Semra, 2008. "A review on adsorption heat pump: Problems and solutions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(9), pages 2381-2403, December.
    8. Guo, Jiangfeng & Xu, Mingtian & Cheng, Lin, 2009. "The application of field synergy number in shell-and-tube heat exchanger optimization design," Applied Energy, Elsevier, vol. 86(10), pages 2079-2087, October.
    9. 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.
    10. Chen, Qun & Xu, Yun-Chao, 2012. "An entransy dissipation-based optimization principle for building central chilled water systems," Energy, Elsevier, vol. 37(1), pages 571-579.
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    3. Zhang, Jing & Zhang, Hong-Hu & He, Ya-Ling & Tao, Wen-Quan, 2016. "A comprehensive review on advances and applications of industrial heat pumps based on the practices in China," Applied Energy, Elsevier, vol. 178(C), pages 800-825.
    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. Xiao, Gang & Yang, Tianfeng & Liu, Huanlei & Ni, Dong & Ferrari, Mario Luigi & Li, Mingchun & Luo, Zhongyang & Cen, Kefa & Ni, Mingjiang, 2017. "Recuperators for micro gas turbines: A review," Applied Energy, Elsevier, vol. 197(C), pages 83-99.
    6. 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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