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A simultaneous approach for heat and cold production enabled by heat pump and latent thermal energy storage.

Number: 2294

Author(s) : KOU X., WANG R.

Summary

A circumstance with both heating and cooling demands has emerged ubiquitously across building and urban scales. This scenario is ideally addressed by implementing the evaporator and condenser of a heat pump. However, an ongoing challenge exists to harmonize the time and amount of heat and cold production with the user’s demand. More importantly, determining the effectiveness of a heat pump’s dual functionality across diverse applications remains up in the air. In this paper, the integration of a heat pump and latent heat and cold storage is proposed. Two independent latent heat and cold storage units are integrated to align the time and amount between heat and cold generation and demand, thereby facilitating a demand-oriented thermal energy supply service. Simulations are performed in intermittent, alternate, and scattered heating and cooling scenarios. Based on second-law efficiency and exergy analysis, we establish thermodynamic criteria - the ratio of power consumption (RP) and the ratio of time spent (RT) - for systems with simultaneous heating and cooling mechanisms. Such simultaneous production can yield substantial energy savings of up to 46%, and double the output thermal power in some cases compared to alternate heating and cooling heat pumps. Nevertheless, the simultaneous heating and cooling mechanism proves challenging for a single-stage heat pump with significant temperature differences in achieving an appreciable competitive edge in RP and RT. Further refinement in heat pump design and refrigerant selection poses a research frontier.

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Pages: 11 p.

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  • Original title: A simultaneous approach for heat and cold production enabled by heat pump and latent thermal energy storage.
  • Record ID : 30033187
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2024/07/17

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