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Comparative study of heat storage system in water vapor compression heat pump for industrial processes.

Number: 1188

Author(s) : KIM S. T., KLÖPPEL S., NICKE E., MALLESWARARAO K., LINDER M., STATHOPOULOS P.

Summary

The thermodynamic performance of a two-stage high-temperature heat pump (HTHP), utilizing water/steam as a refrigerant, along with two distinct thermal energy storage systems, concrete sensible heat storage (SHS) and strontium bromide/water thermochemical energy storage (SrBr 2/H 2O TCES), were evaluated. The proposed HTHP demonstrated sufficient capability to supply heat above 200°C with a high COP of 5.2-7.5. While concrete SHS cannot release heat beyond the temperature at which it was stored, 190°C, TCES can release heat above 200°C. Additionally, the SHS system cannot satisfy the limited heat release operation time when it has a lower cycle out temperature than the condensation temperature of the HTHP cycle. It was also observed that SrBr2/H 2O TCES required 45% less material mass and 68% less volume, respectively. In the techno-economic evaluation, the integrated system comprising HTHP and TCES yielded a net present value of €454,075-€171,890. Furthermore, the internal rate of return was calculated to be between 15.3-23.0%.

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Pages: 9 p.

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Details

  • Original title: Comparative study of heat storage system in water vapor compression heat pump for industrial processes.
  • Record ID : 30032703
  • Languages: English
  • Subject: Technology
  • Source: 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2024). Proceedings. University of Maryland, College Park, Maryland, USA, August 11-14 2024
  • Publication date: 2024/08
  • DOI: http://dx.doi.org/10.18462/iir.gl2024.1188

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