Prédiction de la distribution de l’écoulement diphasique dans des échangeurs de chaleur à micro-canaux à l'aide d'un réseau neuronal artificiel

Translated title of the contribution: Prediction of two-phase flow distribution in microchannel heat exchangers using artificial neural network

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Due to the intrinsic complexity of two-phase flow distribution and the limited mathematical flexibility of conventional formulations of the phenomenon, previous attempts generally fall short in the accuracy and applicability of their prediction. To address these issues, this study focuses on methods with higher mathematical flexibility. Specifically, the construction and training of Artificial Neural Network (ANN) is presented for the identification of this complex phenomenon. The interaction of the numerous physical phenomena, occurring at different scales, is thus represented by the network structure, offering a formulation capable of achieving higher accuracy. Experimental data from a full-scale heat exchanger of an air-conditioning system operating over a wide range of conditions are used to train and test the ANN. The network optimisation with Bayesian regularisation against experimental data leads to a structure featuring 4 inputs, 3 hidden layers, and 3 neurons for each layer, which demonstrates deviations on the single output mostly lower than ± 10% and a correlation index higher than 98%, when the whole data set is used for training the ANN. The analysis of the network optimisation for different shares of data used for the network testing, shows higher training and testing accuracy as the number of training data increases, along with no apparent overfitting.

Translated title of the contributionPrediction of two-phase flow distribution in microchannel heat exchangers using artificial neural network
Original languageFrench
Pages (from-to)53-62
Number of pages10
JournalInternational Journal of Refrigeration
Volume111
DOIs
Publication statusPublished - 2020 Mar

Keywords

  • Artificial neural network
  • Flow distribution
  • Microchannel heat exchanger
  • Two-phase flow

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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