Plate heat exchanger state prediction method based on logarithmic temperature difference

A technology of plate heat exchanger and prediction method, applied in prediction, instrument, complex mathematical operation, etc., can solve problems such as hidden safety hazards and low measurement adaptability

Pending Publication Date: 2021-11-26
陕西启迪瑞行清洁能源研究院有限公司
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Problems solved by technology

However, due to the fact that there are many types of plate heat exchangers according to different supply and return water temperatures, the existing technical solutions are not highly adaptable to certain performance and state measurement. At the same time, because the state change of plate heat exchangers is a continuous process, Often there is no potential safety hazard in the current state, and a potential safety hazard may have occurred when the maintenance personnel conduct another inspection

Method used

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  • Plate heat exchanger state prediction method based on logarithmic temperature difference
  • Plate heat exchanger state prediction method based on logarithmic temperature difference
  • Plate heat exchanger state prediction method based on logarithmic temperature difference

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Embodiment approach

[0062] As an optional implementation of the present invention, step 5 includes:

[0063] Step 51: Obtain historical blockage data of the plate heat exchanger;

[0064] Step 52: use the historical congestion data to train the preset Markov prediction model, set the historical congestion data to indicate the degree of congestion in different historical periods, so that the Markov prediction model can learn the features in the historical congestion data in a supervised learning manner, and Iteratively adjust the parameters in the Markov model until the output is consistent with the mark to obtain a trained Markov model;

[0065] Step 53: Input the cleaning index of the current cycle into the trained Markov model, and set the Markov output cycle to be consistent with the target cycle, and predict the cleaning index of the plate heat exchanger after the target cycle.

[0066] As an optional implementation of the present invention, after step 4, the cleaning index prediction method...

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Abstract

The invention provides a plate heat exchanger cleaning index prediction method based on logarithmic temperature difference. The method comprises: obtaining the accumulated heat supply amount of a heat meter connected with the plate heat exchanger and heat supply parameters of the plate heat exchanger; calculating the temperature difference ratio of the plate heat exchanger and calculating the heat consumption of the heat meter in the current period; further obtaining the logarithmic average temperature difference of the plate type heat exchanger; calculating a current cleaning index of the plate heat exchanger by using a cleaning index calculation formula according to the heat consumption and the logarithmic average temperature difference of the current period; and inputting the current cleaning index into a trained prediction model, and predicting the cleaning index of the plate heat exchanger after the target period. Aiming at different types of plate heat exchangers, the energy efficiency parameter value of the plate heat exchanger is predicted cycle by cycle through the supply water temperature and the return water temperature on the two sides and the heat consumption of the heat meter in the current cycle, the cleaning index is predicted, the plate heat exchanger is guided to be cleaned, the heat supply capacity of a heat exchange station is improved, and potential safety hazards are reduced.

Description

technical field [0001] The invention belongs to the technical field of heating energy consumption, and in particular relates to a state prediction method of a plate heat exchanger based on a logarithmic temperature difference. Background technique [0002] As people's lives become more and more stable, there are higher requirements for the quality of life. Heat energy is a necessity in daily life, and its supply process requires a large-scale heating system to transport the heat produced by the heat source to the residents for use through the heat exchange station. The heat exchanger is the main heating equipment for the purpose of heat transfer, and plays a vital role in the heating process. [0003] The plate heat exchanger has the advantages of high efficiency, compactness, wide application range, high heat exchange efficiency, long service life, and heat recovery rate as high as 90%. It is a commonly used heating equipment in the heating industry. The main function of ...

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Application Information

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IPC IPC(8): G06Q10/04G06Q10/00G06K9/62G06F17/18
CPCG06Q10/04G06F17/18G06Q10/20G06F18/214
Inventor 马亮黄维来婷刘璠杜威
Owner 陕西启迪瑞行清洁能源研究院有限公司
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