Abstract
We propose a method for analyzing the sensitivity of recoverable heat in a multi-pressure heat recovery steam generator. In order to calculate how much steam is supplied to the steam turbine, equations of heat balance are derived from the quantities of steam which are generated in the heat recovery steam generator and recoverable heat such as that of gas turbine exhaust or from other heat sources. A matrix which represents the relationship between the quantities of steam and the recoverable heat is obtained from the equations of heat balance. The performances of the bottomming cycle can be analyzed by comparing the elements of the matrix. This method is applied to bottomming cycles of a three-pressure heat recovery steam generator which have various types of recoverable heats.
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