Thermal Performance Design and Analysis of Reversed Brayton Cycle Heat Pumps for High-Temperature Heat Supply

Jin-Seo Kim, In-Ho Chung, Tong-Seop Kim () and Chan-Ho Song
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Jin-Seo Kim: Graduate School, Inha University, 100 Inha-ro, Michuhol-Gu, Incheon 22212, Republic of Korea
In-Ho Chung: Graduate School, Inha University, 100 Inha-ro, Michuhol-Gu, Incheon 22212, Republic of Korea
Tong-Seop Kim: Department of Mechanical Engineering, Inha University, 100 Inha-ro, Michuhol-Gu, Incheon 22212, Republic of Korea
Chan-Ho Song: Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-Gu, Taejon 34103, Republic of Korea

Energies, 2024, vol. 17, issue 12, 1-18

Abstract: This study examined the performance of reversed Brayton cycle heat pumps to supply heat above 300 °C. The aim was to overcome the current temperature limitations faced by heat pump technology in industrial heat supply sectors by examining the viability of the reversed Brayton cycle. In particular, the effects of the operating conditions on the cycle performance, such as the waste and return heat temperatures, were analyzed through thermal performance analysis. The reversed Brayton cycle heat pumps showed improved performance over conventional vapor compression cycle heat pumps when a heat supply above 215 °C was required. Furthermore, integrating additional heat exchangers into the cycle configuration was proposed in this study as a method to enhance waste heat utilization and recover unused heat from industrial processes. By incorporating preheating and recuperated cycles, these modifications broaden the operational range under the same operating conditions. They also improve the coefficient of performance (COP) of the reference cycle by up to 23% and 27.4%, respectively. This study explored the potential of reversed Brayton cycle heat pumps to supply heat above 300 °C and provided fundamental guidelines for the efficient design and operation of reversed Brayton cycle heat pumps. The results are expected to enhance our understanding of the performance characteristics of reversed Brayton cycle heat pump technology and expand its use as an alternative to fossil-fuel-based heat supply systems.

Keywords: heat pump; reversed Brayton cycle; industrial heat supply; performance analysis; coefficient of performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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