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Efficiencies of CaO/H2O/Ca(OH)2 chemical heat pump for heat storing and heating/cooling

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  • Ogura, Hironao
  • Yamamoto, Tetsuya
  • Kage, Hiroyuki

Abstract

In order to save energy and decrease environmental impacts of thermal energy utilization systems, a CaO/H2O/Ca(OH)2 chemical heat pump (CHP) can be used for high-density heat storage and the cooling/heating functions. In this paper, the performance of the CHP for distinctive functions was examined in comparison with that of the other heat pumps based on the authors’ experimental and theoretical studies over ten years on the CaO/H2O/Ca(OH)2 CHPs. As a result, the CaO/H2O/Ca(OH)2 CHPs are found to work more efficiently than other types of heat pumps for wider operating temperature ranges in appropriate heat source conditions.

Suggested Citation

  • Ogura, Hironao & Yamamoto, Tetsuya & Kage, Hiroyuki, 2003. "Efficiencies of CaO/H2O/Ca(OH)2 chemical heat pump for heat storing and heating/cooling," Energy, Elsevier, vol. 28(14), pages 1479-1493.
    • Handle: RePEc:eee:energy:v:28:y:2003:i:14:p:1479-1493
    DOI: 10.1016/S0360-5442(03)00119-1
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    1. Pelay, Ugo & Luo, Lingai & Fan, Yilin & Stitou, Driss & Rood, Mark, 2017. "Thermal energy storage systems for concentrated solar power plants," Renewable and Sustainable Energy Reviews, Elsevier, vol. 79(C), pages 82-100.
    2. Nagel, Thomas & Beckert, Steffen & Lehmann, Christoph & Gläser, Roger & Kolditz, Olaf, 2016. "Multi-physical continuum models of thermochemical heat storage and transformation in porous media and powder beds—A review," Applied Energy, Elsevier, vol. 178(C), pages 323-345.
    3. Nagel, T. & Shao, H. & Singh, A.K. & Watanabe, N. & Roßkopf, C. & Linder, M. & Wörner, A. & Kolditz, O., 2013. "Non-equilibrium thermochemical heat storage in porous media: Part 1 – Conceptual model," Energy, Elsevier, vol. 60(C), pages 254-270.
    4. Yawen Ren & Hironao Ogura, 2023. "Dynamic Simulations on Enhanced Heat Recovery Using Heat Exchange PCM Fluid for Solar Collector," Energies, MDPI, vol. 16(7), pages 1-18, March.
    5. Yan, T. & Wang, R.Z. & Li, T.X. & Wang, L.W. & Fred, Ishugah T., 2015. "A review of promising candidate reactions for chemical heat storage," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 13-31.
    6. Dizaji, Hossein Beidaghy & Hosseini, Hannaneh, 2018. "A review of material screening in pure and mixed-metal oxide thermochemical energy storage (TCES) systems for concentrated solar power (CSP) applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 98(C), pages 9-26.
    7. Shkatulov, Alexandr & Aristov, Yuri, 2015. "Modification of magnesium and calcium hydroxides with salts: An efficient way to advanced materials for storage of middle-temperature heat," Energy, Elsevier, vol. 85(C), pages 667-676.
    8. 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.
    9. Shao, H. & Nagel, T. & Roßkopf, C. & Linder, M. & Wörner, A. & Kolditz, O., 2013. "Non-equilibrium thermo-chemical heat storage in porous media: Part 2 – A 1D computational model for a calcium hydroxide reaction system," Energy, Elsevier, vol. 60(C), pages 271-282.

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