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Investigation on system performance of air source heat pump water heater with phase change material.

Number: No 335

Author(s) : LIU Z., WANG T., GAO N., ZHAO H., GAO Y.

Summary

In this paper, a series of experimental tests on air source heat pump water heater (ASHPWH) using a novel heat battery module with phase change material (PCM) were carried out. The melting temperature of PCM is 58°C. Meanwhile special attention has been paid to the optimization of heat transfer in heat battery module by means of computational fluid dynamics (CFD). The results indicate that the instant coefficient of performance (ICOP) of ASHP is up to 3.82 but the operation of ASHP is unstable and in poor condition with a 1.3 mm caliber electronic expansion valve. The latest experiment shows that using 1.5 mm caliber electronic expansion valve can not only make ASHP run more smoothly but also increase ICOP to 4.08. During the discharge process of heat battery module, 106.5L domestic water can be heated from 15°C to 40°C. The CFD simulation testifies copper fins applied in heat battery module can greatly enhanced the heat transfer coefficient compared with aluminum fins.

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Pages: 9 p.

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Details

  • Original title: Investigation on system performance of air source heat pump water heater with phase change material.
  • Record ID : 30030106
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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