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Heat pumps with integrated thermochemical energy storage for electricity load levelling.

Number: 2514

Author(s) : DUFFY A. M., SAYGIN A., GARIMELLA S.

Summary

Integrating thermal energy storage (TES) with residential heating systems is an enabling technology for incorporating renewable sources into the electricity grid. In this paper, a system-level model of a thermochemical energy storage system integrated with a residential heat pump is developed. A transient lumped model of the adsorption cycle is developed to investigate the dynamic charging and discharging characteristics of strontium bromide as a thermochemical storage adsorbent. Results from this model are coupled with a vapor compression cycle model to analyze the performance of the integrated system. The heating coefficient of performance (COP) as well as discharging temperature and heat duty are analyzed for a range of cycle parameters, including charging temperature for the thermal storage and discharging temperature. The effect of storage duration on performance is also reported. A representative system is capable of discharging at a temperature greater than 30°C for four hours, providing an average heat duty of 2.4 kW. This sample system operates with a COP of 2.6 using renewably generated electricity to charge the system.

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  • Original title: Heat pumps with integrated thermochemical energy storage for electricity load levelling.
  • Record ID : 30033041
  • 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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