Computer Aided Intelligent Control of Inlet Air Cooling System in Combined Cycle Power Plant

Abstract

In hot climate, the overall efficiency of combined cycle power plant (CCPP) decreases dramatically owing to the rise of environment temperature, which decreases the mass air flow to the compressor. Therefore, the gross power and thermal efficiency drop. Worldwide practice uncovers that gas turbines generate up to 20% less power in summer than in winter. A brief introduction of the CCPP and analysis of influence of ambient temperature are provided in this work. Furthermore, this essay gives a outline of the combined cycle based on several inlet air cooling technologies and why they are necessary. Since 1987, more and more inlet air cooling systems have been devised, each of which has its own advantages and limitations. They are mainly divided into 2 classes. Low cost and ease of operation are the main advantages of evaporation systems. However, they are strictly restricted by the wet-bulb temperature. In terms of the mechanical systems, which are not limited to it, command high initial and operating cost. The absorption chiller utilizes the waste heat of exhaust gases, which means they have great potential. In the end, economic criteria and problems to be solved are mentioned.