【摘要】 以系统性能COP和效率ηe作为综合优化目标函数,选取热源温度、循环平均压力、冷热腔容积比和转速作为决策变量。在决策变量的约束条件内,采用Matlab软件和NSGA-Ⅱ算法,得到Pareto最优前端,利用TOPSIS优选方法优选COP和效率ηe综合指标最佳的工况。对于以上4个决策变量,热源温度对目标函数的影响最大,冷热腔容积比与转速影响相对较小,循环平均压力的影响最小。因此在实际运行中,应首先保证热源温度恒定。更多还原

【Abstract】 Vuilleumiercycle heat pump has the potential applications in the small capacity distributed energy system.The system coefficient of performance(COP)and of exergy efficiency are selected as the comprehensive optimizationobjective functions,and the heat source temperature,average cycle pressure,ratio of hot and cold discharge volume andspeed of rotation are treated as the decision variables.Within the constraints of the decision variables,operatingcondition which is the trade-off between COP and exergy efficiency is obtained using TOPSIS optimization method basedon Pareto front using NSGA-II algorithm and Matlab software.For these four decision variables,the heat sourcetemperature has the greatest influence on COP and exergy efficiency,the average cycle pressure,ratio of hot and colddischarge volume are relative small,while the speed of rotation has smallest impact on the objective functions.Therefore,it is important to keep the stable of the heat source temperature in the field operation to get higher systemperformance for VM cycle heat pump.更多还原