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建立CO2/R290复叠制冷系统的热经济性及分析模型并进行最优化分析。将年度投资成本与年度运行费之和(即年度成本)作为目标函数,分析系统中间冷凝温度、冷凝蒸发器温差、蒸发及冷凝温度对系统各组成部分的成本及系统效率的影响。对系统的热经济性进行最优化分析,计算并比较系统各部分的损。结果表明:在额定制冷量下,可通过最优化分析得到系统年度成本最低的最佳运行参数,与额定工况相比年度成本降低了13.9%。得到系统各部分损,为系统实际运行的优化提供理论依据。
The establishment of CO2 / R290 cascade refrigeration system of thermal economy and analysis model and optimize the analysis. Taking the sum of annual investment cost and annual running cost (annual cost) as the objective function, the influence of the system intermediate condensation temperature, condensing evaporator temperature difference, evaporation and condensation temperature on the system cost and system efficiency is analyzed. The system’s thermal economy optimization analysis, calculation and comparison of various parts of the system damage. The results show that the optimal operating parameters with the lowest system annual cost can be obtained through optimization analysis at the rated cooling capacity, and the annual cost is reduced by 13.9% compared with rated conditions. Get all parts of the system damage, the actual operation of the system to provide a theoretical basis for optimization.