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Experimental Analysis of a High Temperature Heat Pump Using Stored Heat from a Solar Thermal System.

Number: No 104

Author(s) : RAMIREZ M., MARTINEZ-URRUTIA A., HEWITT N. J., SHAH N.

Summary

Thermal storage systems use for district heating can improve their efficiency by decreasing their storage temperature and therefore minimizing heat losses and cost. A high temperature heat pump (HTHP) operating with heat source temperature between 30 °C to 50 °C can further optimize the performance of the system and deliver hot water above 70 °C at demand. In this study a HTHP that uses thermal energy produced by a solar thermal system and stored in a seasonal thermal storage has been developed, installed and experimentally investigated under real conditions. An additional challenge of the present work was to build the heat pump using off-the shelf components without further modifications. During two years of operation the water source temperatures measured were from 31 °C to 40 °C and the heating capacity resulted from 35 kW to 43.7 kW.
The COP calculated resulted in values from 5.3 to 6 for pressure ratios between 2.3 to 2.8. The results demonstrated that HTHPs are an attractive approach to use low grade heat sources specially when produced by renewable energy sources.

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  • Original title: Experimental Analysis of a High Temperature Heat Pump Using Stored Heat from a Solar Thermal System.
  • Record ID : 30029985
  • 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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