Method for determining optimal backpressure of direct air cooling unit

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 the problems that affect the accuracy of the model, the exhaust enthalpy of the unit cannot be directly obtained, and engineering application limitations, etc., to achieve energy saving by excavation potential effect

Active Publication Date: 2021-10-15
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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  • Method for determining optimal backpressure of direct air cooling unit
  • Method for determining optimal backpressure of direct air cooling unit
  • Method for determining optimal backpressure of direct air cooling unit

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Embodiment Construction

[0061] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, 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 persons 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 operation back pressure of the direct air-cooled unit, mark the final exhaust steam specific enthalpy ...

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Abstract

The invention discloses a method for determining optimal backpressure of a direct air cooling unit, and the method comprises the steps: combining mechanism analysis with historical data, and determining the final-stage exhaust steam specific enthalpy value of a steam turbine based on historical operation data in combination with a particle swarm optimization (PSO) and XGBoost (eXtreme Graphic Boost, XGBoost) combined algorithm; calculating the micro-increasing power characteristic of the unit by adopting an equivalent enthalpy drop method; and calculating the power consumption of a fan by combining the frequency conversion characteristic of an air-cooling fan, and when the difference between the final-stage exhaust steam specific enthalpy value and the power consumption is the maximum, obtaining the optimal back pressure of the unit under the working condition. According to the method for determining the optimal backpressure of the unit, the optimal backpressure value of the unit under multiple working conditions can be provided, energy-saving optimal operation of the cold end of the air cooling unit can be achieved in an auxiliary mode, and the energy-saving potential of the direct air cooling unit can be deeply excavated.

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 Applications(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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