Mathematical modeling and performance analysis of heat recovery steam generator at Shat-Al Basra power plant

Energy is crucial to economic and social development. The increasing demand for electricity in the world is met by using various primary energy sources. Combined cycle gas turbines (CCGTs) are highly efficient power-generation plants due to their high temperatures and utilization of exhaust gases to generate additional power. Heat recovery steam generator (HRSG) is a very important component in CCGT, this component recovers the energy from flue gases exiting the gas turbine and generates the motive steam. In the present work, HRSG in Shatt-Al Basrah power plant has been simulated using a mathematical model to predict the temperature of the steam out of HRSG in different cases. Different parameters have been studied including the fuel of the power plant and the ambient temperature to calculate heat transfer area of each section and compare the results with actual data which shows a great agreement. The results show that maximum heat transfer occurs in the high-pressure evaporator section due to its large heat transfer area. It is also noticed that the highest LP steam temperature observed is 251.1°C at 15°C light diesel oil case and the highest HP steam temperature is 473.62°C also at 15°C light diesel oil case.