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IIR document

Comparing integrating configurations of latent heat storage in heat pump heating systems.

Number: pap. n. 1644

Author(s) : XU T., HAO Y., SAWALHA S.

Summary

Short-term latent heat thermal energy storage (LHTES) can be integrated in building heating systems for performing load shifting from on- to off-peak hours. In this study, the coupling effects of LHTES integration in heat pump heating systems are investigated for a multi-family building in Stockholm. As the reference heat pump provides heat in two separate heat exchangers, a de-superheater for domestic hot water and a condenser for space heating, two configurations for LHTES integration with the two respective heat exchangers are compared using a quasi-stationary mathematic system model. The performances of the two integrating configurations are also compared with the basic heat pump heating scenario (no heat storage) regarding the total electricity consumption, the seasonal performance factor (SPF), and the electric bills for end-users over a selected heating-season week. The simulation results reveal that, while using the condenser for charging an LHTES unit containing phase change materials melted at 58 oC inevitably increases the total electricity consumption in the heating system relative to the basic scenario, using the desuperheater instead for LHTES charging can reduce the total electricity consumptions and bills of 24 kWh and 173 SEK (17€), respectively, during that specific week.

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Pages: 8

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Details

  • Original title: Comparing integrating configurations of latent heat storage in heat pump heating systems.
  • Record ID : 30026544
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1644

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