| Based on Combined Analvsis the thesis combine Heat.l{ate I ranstormation Coefficient Method and Steam Extraction Coefficient as its theoretical principle to build up a evaluation system and mathematical model for analyzing operation thermal economy and system economy, and provide a powerful tool for power plant economic operation and scientific management. The items have been completed as follow: 1. The computation models for computing thermal economy of auxiliary cycles have been built; 2. The computation models for analyzing and calculating thermal economy of thermal power equipment have been completed; 3.By using the method of Combined Cycle, the main thermal parameters(including the main steam temperature and the vacuum in condenser etc.) have been analyzed and calculated; The Conventional method of thermal balance is adapted for checking the results of computation show that the results obtained by Combined approach and by Conventional method are very close with an e or not excess the scope allowance but the computation is much simnle. Therefore, a shortcut for the energy saving calculation is put forward... |