The Effect of Ambient Temperature on Electric Power Generation in Natural Gas Combined Cycle Power Plant: A Case Study

Abstract

Natural gas combined cycle power plants (CCPPs) are widely used to meet peak loads in electric energy production. Continuous monitoring of the output electrical power of CCPPs is a requirement for power performance. In this study, the role of ambient temperature change having the greatest effect on electric production is investigated for a natural gas CCPP. The plant has generated electricity for fourteen years and setup at 240 MW in Aliağa, İzmir, Turkey. Depending on the seasonal temperature changes, the study data were obtained from each gas turbine (GT), steam turbine (ST) and combined cycle blocks (CCBs) in the ambient temperature range of 8-23°C. It has been found that decreases of the electric energy in the GTs because of the temperature increase and indirectly diminishes of the electricity production in the STs. As a result, the efficiency of each GT, ST and CCB reduced, although the quantity of fuel consumed by the controllers in the plant was decreased. As a result of this data, it has been recommended and applied that additional precautions have been taken for the power plant to bring the air entering the combustion chamber to ideal conditions and necessary air cooling systems have been installed.

Energy and Exergy Analyses of a Natural Gas Fired Combined Cycle Power Plant: Parametric Study

“…Yapılan analizler sonucunda, gaz türbinlerindeki gücün belirtilen sıcaklık aralığında 6 MW, buhar türbinlerinde gücün ise aynı çevre sıcaklığı aralığında yaklaşık 3 MW azaldığı gözlemlenmiştir. Buradan yola çıkılarak çevre sıcaklığının artmasıyla türbinlerin veriminin azaldığı tespit edilmiştir [11]. Abuelnuor ve ark.…”