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Real-time rapid construction method based on transient test data for plate-fin heat exchanger efficiency model

A plate-fin heat exchanger and construction method technology, applied in the field of plate-fin heat exchangers, can solve the problems of long time consumption and high energy consumption, and achieve the effects of improving accuracy, reducing times, and shortening test time

Active Publication Date: 2021-01-08
BEIHANG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a real-time rapid construction method based on transient test data for the efficiency model of plate-fin heat exchangers, which solves the problems of long time-consuming and high energy consumption in obtaining the efficiency model of the heat exchanger through experiments, and can greatly shorten the Test cycle, improve test efficiency

Method used

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  • Real-time rapid construction method based on transient test data for plate-fin heat exchanger efficiency model
  • Real-time rapid construction method based on transient test data for plate-fin heat exchanger efficiency model
  • Real-time rapid construction method based on transient test data for plate-fin heat exchanger efficiency model

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Embodiment Construction

[0055] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0056] Such as figure 1 As shown, the real-time rapid construction method based on transient test data for the plate-fin heat exchanger efficiency model according to an embodiment of the present invention includes:

[0057] A) According to the type of fluid inside the heat exchanger, structure identification model structure.

[0058]The identification model structure is based on the autoregressive model structure derived from the physical process of the heat exchanger. Among them, the standard form of the autoregressive model structure can be expressed as:

[0059]

[0060] where the model parameter a ia (1≤i a ≤n a ), b ib (1≤i b ≤n b ) is obtained by least squares identification, y is the output vector, u is the input vector, i is the discrete time variable, v is the noise vector, n a , n b is...

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Abstract

The invention discloses a real-time rapid construction method based on transient test data for an efficiency model of a plate-fin heat exchanger. The method comprises: a plurality of flow levels are selected as working condition points required to be measured within the normal working range of the heat exchanger; in each test process, the steady-state value is identified and predicted in real timeaccording to the measured outlet temperature change data, so that the steady-state heat exchange efficiency of the current working condition can be obtained in advance without waiting for the outlettemperature to reach a steady state. Through continuous tests, the steady-state heat exchanger efficiency under each test working condition point can be obtained, and then a heat exchanger steady-state heat exchange efficiency model is constructed by taking mass flow on two sides as independent variables. The method solves the problems of long time consumption and high energy consumption for obtaining the heat exchanger efficiency model by using the steady-state test, can greatly shorten the test period, and improves the test efficiency.

Description

technical field [0001] The invention belongs to the technical field of plate-fin heat exchangers, and in particular relates to a real-time rapid construction method based on transient test data for an efficiency model of a plate-fin heat exchanger. Background technique [0002] Heat exchangers are devices that transfer heat from one medium to another and are used in various industrial sectors. High-efficiency heat exchangers can ensure the normal operation of the system, and can also realize waste heat recovery to achieve the purpose of saving energy and reducing consumption. Among them, the partition wall heat exchanger is the most widely used. Partitioning wall heat exchanger is also called surface heat exchanger. Its structural features are: a solid wall separates the hot and cold fluids on both sides, and the heat is transferred through the solid wall. The plate-fin heat exchanger is a kind of wall-type heat exchanger, which is composed of partitions, fins, seals, defl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/08
Inventor 江泓升董素君刘征何跃
Owner BEIHANG UNIV
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