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A flexible heat pump for combined domestic hot water and space heating supply.

Number: 0580

Author(s) : HAJABDOLLAHI Z., MCKEOWN A., ESSADIK M., MOKARRAM N. H., YU Z.

Summary

As the globe moves toward net-zero emissions, the domestics heating supply will become largely electrified. Improving heat pumps efficiency to reduce energy and power consumption is critical to ensuring a sustainable future. The authors' team recently developed a flexible heat pump technology that incorporates a heat storage system into the conventional vapour compression cycle to collect, store, and reuse a portion of the sub-cooling heat from the hot liquid refrigerant. The stored heat can be used for a variety of beneficial purposes. In this paper, we present a study on the application of flexible heat pump technology for both space heating and domestic hot water simultaneously without resorting to a booster heater. The system will contain two parallel condensers that are at different temperatures. When the heat pump is operating in a charging mode, the first condenser for the space heating is engaged at a lower temperature (e.g., 40–45 °C). Once the heat storage has been fully charged, the heat pump will switch to discharging mode, in which the first condenser is bypassed, and the second condenser runs at a higher temperature (about 70°C) and the heat accumulated in the heat storage is discharged.  The results show that, the dual-condenser flexible heat pump has a higher coefficient of performance (COP) than a conventional single-stage heat pump that just provides space heating and can thus effectively supply the hot temperature of the home up to 60–75 °C as needed.

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Pages: 9

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Details

  • Original title: A flexible heat pump for combined domestic hot water and space heating supply.
  • Record ID : 30031428
  • Languages: English
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0580

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