Plate heat exchanger state prediction method based on logarithmic temperature difference

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 ...

AI Technical Summary

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

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