Numerical Analysis on the Performance of a Heat Pump Powered by Surface Water Freezing
Source abstract
Abstract
To better use surface water resources to heat buildings in cold regions, the direct surface water solidification heat source heat pump system is proposed in this paper. With the help of Simulink software R2021a, a numerical model of the heat pump is built and the effects of evaporation temperature and water velocity and temperature at the evaporator inlet on its performance are numerically studied. The results show that, when the evaporation temperature is −3~−5 °C, the surface water inlet temperature is 1~3 °C, and the inlet water flow rate is 0.1~0.5 m/s. With a decrease in the evaporation temperature, increase in the inlet water temperature, and increase in the inlet water flow rate, the heating capacity of the surface water solidified heat pump is gradually increased and eventually stabilized, and the COP of the system is gradually decreased and eventually maintained at the same level. During the stable operation of the system, when the evaporation temperature is −3 °C, the evaporator inlet water velocity is 0.1 m/s and the evaporator inlet water temperature is 1 °C. The COP has maximum values of 3.02, 3.72, and 3.86, respectively. The optimal deicing time is about 15 min.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Freezing and Crystallization Processes · Heat Transfer and Optimization · Phase Change Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
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