Toward artificial intelligence-based modeling of vapor liquid equilibria of carbon dioxide and refrigerant binary systems

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Behzad Vaferi
Mostafa Lashkarbolooki
Hossein Esmaeili
Alireza Shariati


The objective of this study is to design and validate a highly accurate approach based on an artificial neural network (ANN) to predict both bubble and dew point pressures of various CO2–refrigerant binary systems in the tem­perature range of 263.15–367.30 K and pressure of 0.18–9.09 MPa. 503 Expe­rimental vapour–liquid equilibria (VLE) data of nine different CO2‑refrigerant binary mixtures were used for preparation, validation and testing of ANN model. The developed ANN model correlates bubble and dew point pressure to reduced temperature, critical pressure, acentric factor of refrigerant, and disti­bution of CO2 between the vapour and liquid phases. Trial and error procedure reveals that a three-layer neural network with fourteen neurons in the hidden layer is able to predict the pressure with mean square error (MSE), average absolute relative deviation (AARD), root mean square error (RMSE), and correl­ation coefficient (R2) of 0.0133, 2.79 %, 0.1153 and 0.99836, res­pectively. The results confirmed that the ANN model can accurately apply for predicting the VLE data of different binary CO2–refrigerant systems.

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How to Cite
B. Vaferi, M. Lashkarbolooki, H. Esmaeili, and A. Shariati, “Toward artificial intelligence-based modeling of vapor liquid equilibria of carbon dioxide and refrigerant binary systems”, J. Serb. Chem. Soc., vol. 83, no. 2, pp. 199-211, Mar. 2018.


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