TY - JOUR
T1 - Optimizing chevron plate heat exchangers based on the second law of thermodynamics and genetic algorithm
AU - Sodagar-Abardeh, Javad
AU - Ebrahimi-Moghadam, Amir
AU - Farzaneh-Gord, Mahmood
AU - Norouzi, Ali
PY - 2020/3
Y1 - 2020/3
N2 - The aim of the current work is to determine optimal geometries and flow conditions of the chevron plate heat exchangers based on entropy generation minimization approach (a combination of the second law of the thermodynamics and heat transfer and fluid-flow equations). The optimization process is carried out by considering the entropy generation as target function. The all effective parameters are taken into account including chevron angle (30° ≤ β ≤ 60°), surface enlargement factor (1.1 ≤ ϕ ≤ 1.4), dimensionless plate width (19 ≤ W ≤ 79), Prandtl number (2.6 ≤ Pr ≤ 6.4) and Reynolds number (1000 ≤ Re ≤ 8000). The results indicate that for each surface enlargement factor, there is an optimum chevron angle. Also, by increasing chevron angle, the optimum values of dimensionless plate width, working fluid Prandtl number and Reynolds number decrease. After presenting a comprehensive sensitivity analysis, the genetic algorithm is utilized to find optimum conditions at (a) designing and (b) operating situations. In the first situation, the optimization process reveals optimum chevron angle, surface enlargement factor, dimensionless plate width, Prandtl number and Reynolds number. For the second situation, a useful and practical correlation is developed for obtaining optimum Reynolds number as a function of the geometrical parameters.
AB - The aim of the current work is to determine optimal geometries and flow conditions of the chevron plate heat exchangers based on entropy generation minimization approach (a combination of the second law of the thermodynamics and heat transfer and fluid-flow equations). The optimization process is carried out by considering the entropy generation as target function. The all effective parameters are taken into account including chevron angle (30° ≤ β ≤ 60°), surface enlargement factor (1.1 ≤ ϕ ≤ 1.4), dimensionless plate width (19 ≤ W ≤ 79), Prandtl number (2.6 ≤ Pr ≤ 6.4) and Reynolds number (1000 ≤ Re ≤ 8000). The results indicate that for each surface enlargement factor, there is an optimum chevron angle. Also, by increasing chevron angle, the optimum values of dimensionless plate width, working fluid Prandtl number and Reynolds number decrease. After presenting a comprehensive sensitivity analysis, the genetic algorithm is utilized to find optimum conditions at (a) designing and (b) operating situations. In the first situation, the optimization process reveals optimum chevron angle, surface enlargement factor, dimensionless plate width, Prandtl number and Reynolds number. For the second situation, a useful and practical correlation is developed for obtaining optimum Reynolds number as a function of the geometrical parameters.
KW - Chevron-type plate heat exchanger
KW - Entropy generation minimization (EGM)
KW - Optimization
KW - Second law of thermodynamics
UR - http://www.scopus.com/inward/record.url?scp=85072014653&partnerID=8YFLogxK
U2 - 10.1007/s10973-019-08742-3
DO - 10.1007/s10973-019-08742-3
M3 - Journal article
AN - SCOPUS:85072014653
SN - 1388-6150
VL - 139
SP - 3563
EP - 3576
JO - Journal of Thermal Analysis and Calorimetry
JF - Journal of Thermal Analysis and Calorimetry
IS - 6
ER -