HRSG Analysis Using Pinch Principle

Abstract

Vitality interest for a nation like India is expanding continuously. On this date, 70% of energy requirement is fulfilled by thermal power plant in India. Energy requirement has been expanded around 10% in last 10 years. Hence, engineers and researchers are trying hard to improve performance of plant. Combined Cycle Power Plant (CCPP) is using waste heat from gas cycle to generate power in steam cycle. In CCPP, Heat Recovery Steam Generator (HRSG) is major focus of researchers due to scope of performance improvement. There are various methods for parametric optimization of HRSG like exergy analysis, thermo-economic approach etc. Pinch Methodology is used as mathematical modelling tool. Generally, Dual pressure CCPP is used for low power generation capacity below 300 MW and Triple pressure CCPP is for higher range above 350 MW. For present study, Dual pressure and Triple pressure HRSG analysis is done with available literature data. The analysis includes pinch analysis, area and cost analysis using different pinch magnitudes. This analysis will be helpful in selecting optimized range of different parameters for safer operation, high durability of components and higher power output etc. In this paper, analysis of already existing plant data is done. The data such as pressure and temperature of HRSG components, mass flow rates, gas turbine and steam turbine output etc. are utilized for analysis in this paper. The Pinch methodology is applied to the data to achieve optimum performance in terms of higher reliability of power plant, less pollution, well thermally designed equipments etc.