Systematic modification method for steam consumption quantity of steam turbine of feed pump in performance tests for steam turbine
A technology of feedwater pump steam turbine and steam-driven feedwater pump, which is applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve the problem of not considering the influence of steam consumption of steam-driven water pump feedwater pump steam turbine, and achieve accurate steam consumption The effect of volume and corrected steam consumption
Active Publication Date: 2015-03-04
STATE GRID CORP OF CHINA +1
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[0004] In this correction method, the efficiency of the feedwater pump steam turbine is corrected to the design value, wherein the design enthalpy rise of the steam-driven feedwater pump is the enthalpy rise (fixed value) of the feedwater pump under the design working condition of the heat balance diagram provided by the steam turbine manufacturer. The feedwater flow rate is changing. According to the performance curve of the feedwater pump, it can be seen that the design efficiency of the steam-driven feedwater pump and the design enthalpy rise of the feedwater pump change with the feedwater flow rate. Therefore, the change in the design efficiency of the steam-driven feedwater pump is not considered in this correction. Influence on Steam Consumption of Feedwater Pump Turbine
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0021] combine figure 1 , figure 2 , a systematic correction method for the steam consumption of the feedwater pump turbine in the steam turbine performance test. The corrected steam consumption of the feedwater pump turbine is obtained by the following formula:
[0022] The corrected steam consumption of the feedwater pump steam turbine = (feedwater flow rate * corresponding design steam-driven feedwater pump head * standard gravity acceleration) / corresponding design steam-driven feedwater pump efficiency / (feedwater pump steam turbine design efficiency * feedwater pump steam turbine isentropic enthalpy drop);
[0023] Two sets of steam-driven feed water pumps are designed, and the designed head and design efficiency of steam-driven water feed pumps are the same. In the correction of the steam volume of the steam-driven feedwater pump, the facto...
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The invention discloses a systematic modification method for the steam consumption quantity of a steam turbine of a feed pump in performance tests for the steam turbine. The systematic modification method includes that the steam consumption quantity is acquired according to a formula: modified steam consumption quantity of the steam turbine of the feed pump=(water feeding flow X corresponding designed lift of a steam feed pump X the normal acceleration of gravity) / corresponding designed efficiency of the steam feed pump / (designed efficiency of the steam turbine of the feed pump X isentropic enthalpy drop of steam of the steam turbine of the feed pump). The systematic modification method has the advantages that the steam consumption quantity of the steam feed pump is modified, accordingly, the efficiency of the steam turbine of the feed pump and the efficiency of the steam feed pump are modified, and the steam consumption quantity of a steam turbine of the steam feed pump is accurately modified.
Description
technical field [0001] The invention relates to a system correction method for the steam consumption of a feedwater pump steam turbine in a steam turbine performance test. Background technique [0002] In the steam turbine performance test procedure of the prior art, the system correction method for the steam consumption of the feedwater pump turbine is to multiply the feedwater flow rate by the design enthalpy rise of the steam-driven feedwater pump, divide by the design efficiency of the feedwater pump turbine, and then divide by the isentropy of the feedwater pump steam turbine Enthalpy drop, that is, using the following modified formula: [0003] The corrected steam consumption of the feedwater pump steam turbine = (feedwater flow rate * design enthalpy rise of steam-driven feedwater pump) / (design efficiency of feedwater pump steam turbine * isentropic enthalpy drop of feedwater pump steam turbine steam). [0004] In this correction method, the efficiency of the feedw...
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IPC IPC(8): F01D17/00
Inventor 董洋祝令凯宋昂马魁元
Owner STATE GRID CORP OF CHINA