Exergy Analysis of Thermodynamic System of Power Plant Based on Structural Theory

Abstract:

An energy model was developed based on the fuel-product concept. The matrix equation for exergy balance of regenerative system was established, and the mathematical model for exergy analysis of thermal system was structured. Exergy losses, exergy loss rate, exergy loss coefficient and exergy efficiency of the main components of a domestic N600-24.2/566/566 power plant were calculated based on this model. The results showed that the exergy efficiency of high pressure heaters are higher than that of low pressure heaters; the exergy efficiency of grade group of the intermediate pressure turbine are higher than the grade group of high pressure turbine and low pressure turbine. The exergy efficiency of the last grade group of low pressure turbine is the lowest. The exergy efficiency of the governing stage and the last grade group of low pressure turbine are 82.999% and 85.911%; the coefficient of exergy loss is maximum in the boiler (39.204%); the exergy effciency of superheater and reheater are 51.52% and 51.7%. Therefore, superheater and reheater have the largest energy conservation potential. Governing stage and low pressure turbine have more energy conservation potential.

• Periodical: Advanced Materials Research (Volumes 781-784)
• Pages: 2502-2507
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.781-784.2502
• Online since: September 2013
• Authors: Zhong He Han, Ji Xuan Wang, Xiao Zhen Liu, Ya Kai Bai, Ying Ying Wang
• Keywords: Component, Energy Conservation, Exergy Analysis, Fuel-Product, Thermal Power System

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