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Research and development for 200°C compressed water heat pump using exhaust heat with low GWP refrigerant for industrial use.

Number: No 163

Author(s) : SUEMITSU R., SAKAI M., TOGANO Y., KOBAYASHI N., YUKI H., HASEGAWA Y., WAJIMA K., UEDA K.

Summary

According to the Paris Agreement (COP21), the increase in global average temperature should be less than 1.5°C. The industry demands to decrease CO2 emissions; however, the demand for heat at high temperature “more than 100°C” is mostly met by fossil fuels. Therefore, we have studied the process of introducing heat pumps with heating water to 160°C or higher by utilizing exhaust heat. We filtered industrial processes that are highly effective for installing heat pumps and calculated the effect. The installation of heat pumps was confirmed to reduce the primary energy consumption by approximately 14% and running costs 32% compared with using only fossil fuels. Thus, we have been developing 160°C- and 200°C-type centrifugal heat pumps using a low GWP refrigerant and exhaust heat. By 2023, the performance is going to achieve more than a COP 3.5 by heating high temperature pressurized water to 200°C and using heat source water at 95°C with a heating capacity of 600kW. Furthermore, we have selected a refrigerant suitable for high temperature, and the refrigerant candidates have GWPs of 20 or less and stability. 

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  • Original title: Research and development for 200°C compressed water heat pump using exhaust heat with low GWP refrigerant for industrial use.
  • Record ID : 30030017
  • 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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