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对于某一固定的燃气轮机冷热电联供系统,建立联供系统分析模型,确定系统冷电比,即用户负荷的最佳冷电比。当各系数值不变,燃气轮机装机容量不影响系统冷电比,而燃气轮机发电效率越大,联供系统性能越好。对于实际用户负荷,分析冷热电联供系统“以电定冷”和“以冷定电”两种运行方式,当以“以电定冷”运行方式,带电压缩式制冷联供系统性能优于带补燃联供系统性能。当冷电比小于最佳冷电比时,冷热电联供系统采用“以电定冷”运行方式,当冷电比大于最佳冷电比时,冷热电联供系统采用“以冷定电”方式。
For a fixed gas-turbine combined heat and power system, a co-fed system analysis model is established to determine the system’s cold-to-electricity ratio, which is the best ratio of cold to electricity for the user load. When the coefficient values are unchanged, the installed capacity of the gas turbine does not affect the cold-power ratio of the system, and the greater the power generation efficiency of the gas turbine is, the better the performance of the combined system is provided. For the actual user load, the analysis of the CCHP system “to the electric cooling ” and “to cold ” two operating modes, when the “to electric cooling ” mode of operation, Refrigeration combined system performance is better than with a supplementary fuel supply system performance. When the cold-electric ratio is less than the optimal cold-electric ratio, the CCHP system adopts the mode of “electric cooling”, and when the cold-electric ratio is greater than the optimal cold-electric ratio, the CCHP system adopts “To cold electricity ” way.