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Thermodynamic analysis of chemical heat pumps

Author

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  • Obermeier, Jonas
  • Müller, Karsten
  • Arlt, Wolfgang

Abstract

Thermal energy storages and heat pump units represent an important part of high efficient renewable energy systems. By using thermally driven, reversible chemical reactions a combination of thermal energy storage and heat pump can be realized. The influences of thermophysical properties of the involved components on the efficiency of a heat pump cycle is analysed and the relevance of the thermodynamic driving force is worked out. In general, the behaviour of energetic and exergetic efficiency is contrary. In a real cycle, higher enthalpies of reaction decrease the energetic efficiency but increase the exergetic efficiency. Higher enthalpies of reaction allow for lower offsets from equilibrium state for a default thermodynamic driving force of the reaction.

Suggested Citation

  • Obermeier, Jonas & Müller, Karsten & Arlt, Wolfgang, 2015. "Thermodynamic analysis of chemical heat pumps," Energy, Elsevier, vol. 88(C), pages 489-496.
    • Handle: RePEc:eee:energy:v:88:y:2015:i:c:p:489-496
    DOI: 10.1016/j.energy.2015.05.076
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    Cited by:

    1. Michel, Benoit & Clausse, Marc, 2020. "Design of thermochemical heat transformer for waste heat recovery: Methodology for reactive pairs screening and dynamic aspect consideration," Energy, Elsevier, vol. 211(C).
    2. Pan, Z.H. & Zhao, C.Y., 2017. "Gas–solid thermochemical heat storage reactors for high-temperature applications," Energy, Elsevier, vol. 130(C), pages 155-173.
    3. N’Tsoukpoe, Kokouvi Edem & Kuznik, Frédéric, 2021. "A reality check on long-term thermochemical heat storage for household applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 139(C).
    4. Wu, S. & Li, T.X. & Yan, T. & Wang, R.Z., 2019. "Advanced thermochemical resorption heat transformer for high-efficiency energy storage and heat transformation," Energy, Elsevier, vol. 175(C), pages 1222-1233.
    5. Yi Yuan & Yingjie Li & Jianli Zhao, 2018. "Development on Thermochemical Energy Storage Based on CaO-Based Materials: A Review," Sustainability, MDPI, vol. 10(8), pages 1-24, July.

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