目前重型燃机进气冷却装置缺少准确的经济性评价模型，不能提供准确的经济性分析，为此提出了喷雾式进气冷却装置的经济性评价模型。以具体工程的气象资料为依据，以工程热力学理论为基础，通过计算确定设备参数和经济指标，指导投资决策和设备招标。以GE9171E型燃气轮机为例，对其应用喷雾式进气冷却装置的经济性评价模型进行了分析。若采用进气冷却装置，每台联合循环机组年增发电量7 751 026 kW?h，年发电效率提高0.6%，年均净收益99.61万元。喷雾式冷却系统具有明显的经济效益，适用于炎热及水源充足地区。

At present, inlet air cooling system of the heavy-duty gas turbine is lack of accurate economic evaluation model, so it can not provide accurate economic analysis. This paper put forward an economic evaluation model of spray evaporative cooler. Based on the meteorological data of practical engineering and engineering thermodynamics theory, the economic evaluation can determine the equipment parameters and economic indicators, guiding investment decision and equipment bidding through the calculation. Taking GE9171E gas turbine as an example, this paper analyzed the economy of the spray evaporative cooler. The results show that the output of each combined cycle unit will increase 7 751 026 kW?h each year, annual generating efficiency will increase 0.6%, and annual net income will be 996 100 yuan, if the spray evaporative cooler is applied for the gas tubine inlet air, which has obvious economic benefits and is suitable for hot and adequate water areas.