Method for identifying resistance coefficient and heat exchange coefficient of steam pipe network based on genetic algorithm

Abstract

The invention discloses a method for identifying a resistance coefficient and a heat exchange coefficient of a steam pipe network based on a genetic algorithm, which comprises the following steps of: sorting an actual steam pipe network to obtain a topological structure diagram of the actual steam pipe network, sorting basic information of the steam pipe network, and collecting actual operation data of the steam pipe network; according to the selected empirical formula, theoretical values of the resistance coefficient and the heat exchange coefficient of each steam pipeline are calculated, and according to the calculated theoretical values, the change range of the actual resistance coefficient and the actual change range of the heat exchange coefficient are estimated; a steam pipe network hydraulic and thermal coupling simulation model is established, a steam pipe network hydraulic equilibrium equation set and a steam pipe network thermal equilibrium equation set are included, simultaneous solving is conducted, and temperature and pressure distribution of steam running in the steam pipe network is obtained; and identifying and calculating each resistance coefficient and heat exchange coefficient by utilizing a genetic algorithm in combination with a plurality of groups of measured data, and obtaining an identified result. The method can solve the problem that the resistance coefficient and the heat exchange coefficient of the steam pipe network change along with time and are difficult to calculate accurately.

Description

technical field [0001] The present invention relates to the field of steam pipe network, more specifically, relates to a method for identifying resistance coefficient and heat transfer coefficient of steam pipe network based on genetic algorithm. Background technique [0002] Printing and dyeing, papermaking, adhesive tape, food, pharmaceutical, cashmere and chemical industries need to use steam as the basic energy source in the production process, and there is a large demand for industrial heat. As a recognized energy-saving and environment-friendly technology, central heating is a heating method advocated and actively encouraged by the Chinese government. Accelerate the promotion of cogeneration and central heating in northern cities and towns, and accelerate the large-scale development of industrial waste heat heating. [0003] The establishment of a simulation model that conforms to the actual operating characteristics of the heating pipe network is the basis for the de...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, and propose a genetic algorithm-based identification method for steam pipe network resistance coefficient and heat transfer coefficient, which can solve the problem that the steam pipe network resistance coefficient and heat transfer coefficient change with time lead to problems that are difficult to calculate precisely

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