Theoretical analysis, experimental research and industrial verification of high temperature heat pump based on R1233zd(E)

Di Wu, Junzhuo Wei and Bin Hu

Energy, 2025, vol. 319, issue C

Abstract: R1233zd(E), a novel type of HCFO heat pump working medium, offers several advantages, including a higher critical temperature (166.5 °C), near-zero ozone depletion potential (ODP of 0.00034), low global warming potential (GWP of 1), non-toxic and non-flammable properties (A1 safety classification), as well as a moderate compression ratio and volumetric heating capacity. These characteristics make R1233zd(E) highly suitable for various heating capacities and temperature lift conditions in high-temperature heat pump (HTHP) applications. This study designed an HTHP system using R1233zd(E) and constructed a prototype for experimental research. The experimental results show that the R1233zd(E) HTHP prototype can stably achieve high-temperature heating ranging from 110 °C to 145 °C within an evaporation temperature range of 40 °C–65 °C. When the condensation temperature is unchanged, the power consumption, heating capacity, and coefficient of performance (COP) of the R1233zd(E) HTHP prototype increase with rising evaporation temperature. Specifically, at an evaporation temperature of 65 °C and a condensation temperature of 145 °C, the prototype exhibits a power consumption of 43.2 kW, a heating capacity of 96.8 kW, and a COP of 2.24. Additionally, the HTHP system is applied to a heat treatment production line utilizing residual heat sources to supply high-temperature hot water at 120 °C, effectively replacing the original high-temperature steam for heating. In this application, the heating capacity of the unit is 104 kW, the power consumption is 31 kW, and a COP of up to 3.4, indicating excellent energy efficiency. Compared to the original gas boiler, the operating cost can be saved about 127,500 RMB per year, with an investment payback period is not more than 2 years. These results highlight the system's potential to achieve energy-efficient, cost-effective heating while advancing the practical adoption of environmentally friendly working mediums in industrial applications.

Keywords: R1233zd(E); High temperature heat pump; Experimental investigation; Industrial application (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:319:y:2025:i:c:s0360544225008175

DOI: 10.1016/j.energy.2025.135175

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