Abstract
Abstract A simulation study was conducted to explore the evaporative condensation and heat/mass transfer characteristics of the second refrigerant within the calorimeter. The objective was to establish both physical and mathematical models for the second refrigerant and to perform numerical simulations of the pressure and temperature fields within the calorimeter. The second refrigerant in the calorimeter was modeled physically and mathematically, and the pressure and temperature fields within the calorimeter were studied through numerical simulation. The findings indicate that with the input of electric heating power in the calorimeter, the pressure gradually rises alongside the temperature of the second refrigerant, leading to evaporation. Owing to the low surface temperature of the evaporation coil, the evaporated refrigerant vapor condenses on its surface, resulting in a decrease in temperature around the coil. The uneven distribution of temperature contributes to varying heat transfer rates across different areas of the calorimeter shell.x
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