Exergoeconomic Evaluation of a Modern Ultra-Supercritical Power Plant

Energies

Ligang Wang²  Yongping Yang¹  Changqing Dong²  Zhiping Yang²  Gang Xu² 

[1] School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beinong Road 2, Beijing 102206, China;

关键词: ultra-supercritical power plant;    economic analysis;    exergoeconomic evaluation;    cost-effective design;   

DOI  :  10.3390/en5093381

来源: mdpi

【 摘 要 】

In this paper, the exergoeconomic analysis was conducted to an existing ultra-supercritical coal-fired power plant in China to understand the cost-formation process, to evaluate the economic performance of each component and to find possible solutions for more cost-effective designs. The total revenue requirement (TRR) and the specific exergy costing (SPECO) methods were applied for economic analysis and exergy costing, respectively. Quantitative balances of exergy and exergetic costs as well as necessary auxiliary equations for both individual component and the overall system were established. The results show that the exergoeconomic factors of the furnace and heat exchangers at low temperature levels, including air preheater and low-pressure feedwater preheaters, are rather small; while those of other components are relatively large. Moving more heat absorption into furnace to use the effective radiation heat transfer, increasing the air preheating temperature and adding more low pressure feedwater preheaters can be promising solutions for future design.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.