Evaluation of Operational Performance of a Gas Turbine Cogeneration Plant With Intake Air Cooled by Ice Storage

A disadvantage of a gas turbine cogeneration plant is a decrease in maximum power output during the period with high ambient air temperature. One of the ways to avoid this disadvantage is to cool intake air by ice storage and augment maximum power output. An advantage of this system is to utilize a discounted rate for energy charge of electricity consumed to drive electric compression refrigerators for ice storage during the nighttime. The objective of this paper is to investigate the effect of intake air cooling by ice storage on the operational performance of a gas turbine cogeneration plant for district heat and power supply. An optimal operational planning model based on the mixed-integer linear programming is used to assess the effect rationally and efficiently. In a numerical study, the operational performances of gas turbine cogeneration plants with and without intake air cooled by ice storage are compared with each other, and the effect of intake air cooling on the operational strategy and cost is clarified.