Numerical method for determining the allowable medium temperature during transient operation of a thick-walled boiler element in power plant

Archives of Thermodynamics

Dariusz Rz?saFaculty of Mechanical Engineering, Cracow University of Technology, al. Jana Paw?a II 37, Kraków, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Piotr DudaFaculty of Mechanical Engineering, Cracow University of Technology, al. Jana Paw?a II 37, Kraków, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1] Faculty of Mechanical Engineering, Cracow University of Technology, al. Jana Paw?a II 37, Kraków, Poland

关键词: Keywords: Heat transfer;    Thermal stresses;    Optimization;    Power plant;   

DOI  :  10.2478/v10173-011-0034-0

学科分类：能源（综合）

来源: Polska Akademia Nauk * Oddzial w Gdansku, Instytut Maszyn Przeplywowych / Polish Academy of Sciences, Institute of Fluid-Flow Machinery

【 摘 要 】

Secure and cost-effective power generation has become very important nowdays. Care must be taken while designing and operating modern steam power plants. There are regulations such as German boiler regulations (Technische Regeln für Dampfkessel 301) or European Standards that guide the user how to operate the steam power plants. However, those regulations are based on the quasi-steady state assumption and one dimensional temperature distribution in the entire element. This simplifications may not guarantee that the heating and cooling operations are conducted in the most efficient way. Thus, it was important to find an improved method that can allow to establish optimum parameters for heating and cooling operations. The optimum parameters should guarantee that the maximum total stresses in the construction element are in the allowable limits and the entire process is conducted in the shortest time. This paper summarizes mathematical descriptions how to optimize shut down process of power block devices. The optimization formulation is based on the assumption that the maximum total stresses in the whole construction element should be kept within allowable limits during cooling operation. Additionally, the operation should be processed in the shortest time possible.

【 授权许可】

Unknown