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A method for determining the optimal back pressure of direct air-cooled units

An air-cooled unit and a technology to determine the method, which is applied to steam/steam condensers, lighting and heating equipment, etc., can solve problems affecting the accuracy of the model, engineering application restrictions, and the exhaust enthalpy of the unit cannot be directly obtained, so as to achieve energy saving by mining potential effect

Active Publication Date: 2022-07-29
TAIYUAN UNIV OF TECH
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Problems solved by technology

However, due to the influence of online measurement conditions, the exhaust enthalpy of the unit cannot be directly obtained. Most of the existing research methods consider that the exhaust steam at the final stage of the unit is saturated wet steam, but such a simplified assumption will affect the accuracy of the model. The optimal back pressure is a theoretical value, subject to certain restrictions in engineering applications

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  • A method for determining the optimal back pressure of direct air-cooled units

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[0061] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described in addition are only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0062] Refer to the attached figure 1 , a method for determining the optimal back pressure of a direct air-cooling unit provided by the present invention includes:

[0063] Obtain the historical operation data of the key characteristic variables affecting the operating back pressure of the direct air-cooled unit, mark the final exhaust steam specific enthalpy value of the steam...

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Abstract

The invention discloses a method for determining the optimal back pressure of a direct air-cooling unit. The method combines mechanism analysis with historical data, and based on historical operation data, combines Particle Swarm Optimization (PSO) and XGBoost (eXtreme Gradient Boosting, XGBoost) combined algorithm to determine the specific enthalpy value of the exhaust steam at the final stage of the steam turbine; the equivalent enthalpy drop method is used to calculate the micro-increased power characteristics of the group; combined with the frequency conversion characteristics of the air-cooled fan to calculate the fan power consumption, when the difference between the two is the largest, that is, the unit is in The optimum back pressure under this condition. The method for determining the optimal back pressure of the unit proposed by the invention can provide the optimal back pressure value of the unit under multiple working conditions, assist in realizing the energy-saving and optimal operation of the cold end of the air-cooling unit, and help to deeply tap the energy-saving potential of the direct air-cooling unit.

Description

technical field [0001] The invention relates to the technical field of thermal equipment data prediction, in particular to a method for determining the optimal back pressure of a direct air-cooling unit. Background technique [0002] The operating back pressure of the direct air-cooled unit is one of the key parameters for the energy-saving operation of the unit. Although reducing the back pressure can increase the generating power of the unit, it will also increase the power consumption of the air-cooled island fan. Therefore, to determine the optimal back pressure of the unit, a balance should be sought between the increase in the generating power of the unit and the increase in the power consumption of the air-cooling fan. At the same time, the back pressure of the direct air-cooled unit will be affected by multiple boundary conditions such as unit load, oncoming wind speed, and ambient temperature, and will show different characteristics under different operating conditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28B11/00F28B1/06
CPCF28B11/00F28B1/06
Inventor 徐婧崔智鹏赵贯甲王晓鹰马素霞张立芳
Owner TAIYUAN UNIV OF TECH
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