Abstract
There are several power augmentation methods available for GTs (gas turbines), such as steam or water injection into the combustor, inlet cooling of the compressor, and increasing the firing temperature. Recently, inlet fogging systems have been extensively used to boost the GT power, due to its low cost and easy installation. More and more studies have begun to focus on the effects of inlet fogging systems on power augmentation for GT- based cycles. In Taiwan, most of the power generation GTs operate with combined cycles for base load. Only small portion of GTs operate with simple cycles for peak load. The capacity of reserve power will be in a low level in the near future. In order to prevent electricity shortage due to the derating of power outputs on hot summer days, the power augmentation strategies for GT-based cycles need to be studied in advance. Since inlet fogging is one of the good options for power augmentation of GT-based cycles, our studies will focus on power augmentation by inlet fogging for GT-based simple and combined cycles. The objective of this thesis is to add an inlet fogging system onto existing GT-based power plants to study the effects caused by that system. Results show that GT-based simple and combined cycles with overspray inlet fogging are capable of boosting the power outputs and improving the efficiencies of the power plants while the overspray inlet fogging systems are operated in the proper range.