Open AccessDimensional analysis applied to jacketed shell and tube heat exchangers modeling
Author(s) -
Andrés Escalona,
Yanán Camaraza-Medina,
Yoalbys Retirado–Mediaceja,
Ever Góngora-Leyva,
Manuel Vega-Almagüer
Publication year - 2021
Publication title -
enfoque ute
Language(s) - English
Resource type - Journals
eISSN - 1390-9363
pISSN - 1390-6542
DOI - 10.29019/enfoqueute.745
Subject(s) - heat exchanger , dimensionless quantity , heat transfer , shell and tube heat exchanger , approximation error , mathematics , multivariate statistics , ntu method , mechanics , thermodynamics , heat transfer coefficient , mechanical engineering , engineering , statistics , micro heat exchanger , physics
Dimensional analysis was utilized on this research to establish a shortcut model for predicting hydrogen sulphide gas discharge temperature in jacketed shell and tube heat exchangers. Since the equipment belongs to an online industrial facility, the passive experimental method was applied. Selection of the heat transfer process parameters was followed by application of the Buckingham Pi-theorem and the repeating-variables technique. After formulation of the dimensionless groups, approximation of the explicit model equation was carried out through a least-squares multivariate linear regression. The model predictive ability performance was appraised by comparing predictions versus measured discharge temperatures, hence attaining a Pearson correlation of 97.5 %, a mean absolute error of 2.1 K, and 1.7 % maximum deviations. The explicit equation that was obtained is pertinent to studied heat exchangers, when 0.55 ≤ ṁ1 ≤ 0.60, 1.06 ≤ ṁ2 ≤ 1.09, and 0.22 ≤ ṁ3 ≤ 0.24 (fluids flowrate, kg/s). It can be used as an alternative calculation method for quick anticipation of the equipment performance, which overcomes computation of the overall heat transfer coefficients.