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Performance analysis of high-temperature heat pump using low quality waste heat source from marine engines.

Number: 0693

Author(s) : WATANABE K., INOUE N.

Summary

To reduce greenhouse gas emissions from marine vessels, introducing new energy-saving technologies, such as the effective use of low-quality waste heat sources from marine engines, is essential. A high-temperature heat pump system that produces high-temperature water and steam using the unutilized low-quality waste heat from marine engines is an energy-saving technology that can help achieve "carbon neutrality" in marine vessels. In this study, the performance of a high-temperature heat pump system utilizing the exhaust heat from marine engines was analyzed using the refrigerant R245fa and its alternative low-GWP refrigerants, R1336mzz(E), R1336mzz(Z), R1233zd(E), and R1224yd(Z), as the working fluids. Furthermore, the heat transfer performance (UA-values) was investigated using a layered microchannel heat exchanger as a condenser in a high-temperature heat pump system. Consequently, R1233zd(E), which exhibits a high coefficient of performance, shows significant potential as a next-generation working fluid, although its pressure loss in the condenser is slightly higher than that of the conventional refrigerant R245fa.

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Pages: 9

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Details

  • Original title: Performance analysis of high-temperature heat pump using low quality waste heat source from marine engines.
  • Record ID : 30031453
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0693

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