Estimating the permissible number of loading cycles for shutdown of high-pressure heaters of thermal power plants

Abstract

The article presents design analysis results for temperature fields in high pressure heater (HPH) elements of a TPP. It determines the permissible number of switching cycles of the HPH based on cyclic strength of the housing walls and the flanged joint membrane. A correlation is found between the position of the aggregate state limit and the cyclic strength of the heater elements; conditions are described under which the required cyclic strength is achieved