Method for calculating final examination heat consumption rate after turbine through-flow transformation

Abstract

The invention discloses a method for calculating the final examination heat consumption rate after turbine through-flow transformation, and the method comprises the steps: A, calculating the THA working condition heat consumption rate x after turbine through-flow transformation, selecting the weight of the heat consumption rate as 0.2, and entering the step B; B, calculating the 75% THA working condition heat consumption rate y after turbine through-flow transformation, selecting the weight of the heat consumption rate to be 0.5, and entering the step C; C, calculating the 50% THA working condition heat consumption rate z of the turbine after through-flow transformation, selecting the weight of the heat consumption rate as 0.3, and entering the step D; D, calculating a final assessment heat consumption rate HRfinal according to a formula provided by the invention, and entering the step E; E, comparing the final assessment heat consumption rate HRfinal with the turbine through-flow transformation heat consumption rate guarantee value HRguarantee value to obtain a final assessment heat consumption rate evaluation result after final turbine through-flow transformation. The method provided by the invention is completely different from a previous performance assessment test in which only 100% THA working condition heat consumption rate is used as a final assessment index. Accordingto the invention, the user experience of performance test work is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of steam turbines, and in particular relates to a method for calculating the final assessment heat consumption rate of a steam turbine after through-flow modification. Background technique [0002] According to statistics, as of November 2008, the number of various types of steam turbines produced by major domestic steam turbine manufacturers is shown in Table 1 below. It can be seen from Table 1 that 300MW class subcritical steam turbines have always occupied an absolute majority in the total number of steam turbines in power plants. On the other hand, according to the recent investigation and summary of the economics of 300MW subcritical steam turbines, it is found that the steam turbine flow transformation is being vigorously implemented when the heat consumption rate of this type of steam turbine is generally high. [0003] Defects and deficiencies of the prior art: [0004] As far as the current flow ...

AI Technical Summary

Problems solved by technology

The results of such a performance assessment test will result in extremely poor user experience.

[0011] 2. Part load heat rate is high

[0012] The performance test results of the No. 1 steam turbine before the flow transformation of the LH power plant in May 2016 show that [10] , the corrected heat rate is high under 100%, 75% and 50% load conditions

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