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Exploring the power demand and efficiency performance limits of heat pumps with thermal storage.

Number: 3582

Author(s) : GLUESENKAMP K., AKAMO D., LI Z., QIAO Y., HIRSCHEY J., LIU X., SHEN B.

Summary

Heat pumps can be combined with thermal storage to enable the heat pump to operate at the time of day desired by the operator. Moving the heat pump operation to a different time of day can reduce the power draw during the grid peak time and can affect the efficiency by resulting in heat pump operation at different ambient temperatures. This work explores the performance limits of HP-TES systems. Fundamental limits are explored (assuming Carnot heat pump operation), and realistic limits are explored (using realistic vapor compression cycle performance). The performance is evaluated with respect to efficiency and power demand during peak grid times. This manuscript investigates the potential for both energy and demand reduction offered by heat pumps (HPs) integrated with thermal energy storage (TES) systems, employing both analytical and numerical modeling techniques for HPs. Simulation analysis explores the conceivable temperature configurations in HP-TES systems, including the application temperature, TES temperature, and ambient temperature. The findings suggest that maximum energy savings are predominantly achieved when the temperature of the TES closely aligns with that of the application. Conversely, a substantial temperature differential between the TES and the application yields the greatest reduction in peak demand. Furthermore, the potential for energy conservation increases with the increase in the amplitude of ambient temperature fluctuations.

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Pages: 10 p.

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  • Original title: Exploring the power demand and efficiency performance limits of heat pumps with thermal storage.
  • Record ID : 30032904
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 8th International High Performance Buildings Conference at Purdue.
  • Publication date: 2024/07/15

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