Optimization of a Finned Shell and Tube Heat Exchanger Using a Multi-Objective Optimization Genetic Algorithm
Open Access
- 24 August 2015
- journal article
- research article
- Published by MDPI AG in Sustainability
- Vol. 7 (9), 11679-11695
- https://doi.org/10.3390/su70911679
Abstract
Heat transfer rate and cost significantly affect designs of shell and tube heat exchangers. From the viewpoint of engineering, an optimum design is obtained via maximum heat transfer rate and minimum cost. Here, an analysis of a radial, finned, shell and tube heat exchanger is carried out, considering nine design parameters: tube arrangement, tube diameter, tube pitch, tube length, number of tubes, fin height, fin thickness, baffle spacing ratio and number of fins per unit length of tube. The “Delaware modified” technique is used to determine heat transfer coefficients and the shell-side pressure drop. In this technique, the baffle cut is 20 percent and the baffle ratio limits range from 0.2 to 0.4. The optimization of the objective functions (maximum heat transfer rate and minimum total cost) is performed using a non-dominated sorting genetic algorithm (NSGA-II), and compared against a one-objective algorithm, to find the best solutions. The results are depicted as a set of solutions on a Pareto front, and show that the heat transfer rate ranges from 3517 to 7075 kW. Also, the minimum and maximum objective functions are specified, allowing the designer to select the best points among these solutions based on requirements. Additionally, variations of shell-side pressure drop with total cost are depicted, and indicate that the pressure drop ranges from 3.8 to 46.7 kPa.Keywords
This publication has 25 references indexed in Scilit:
- CFD modeling and multi-objective optimization of compact heat exchanger using CAN methodApplied Thermal Engineering, 2011
- Energy and cost optimization of a plate and fin heat exchanger using genetic algorithmApplied Thermal Engineering, 2011
- Thermoeconomic optimization of a shell and tube condenser using both genetic algorithm and particle swarmInternational Journal of Refrigeration, 2011
- Economic optimization of shell and tube heat exchanger based on constructal theoryEnergy, 2011
- Thermal-economic multi-objective optimization of plate fin heat exchanger using genetic algorithmApplied Energy, 2009
- Thermodynamic optimization of a coiled tube heat exchanger under constant wall heat flux conditionEnergy, 2009
- Design optimization of shell-and-tube heat exchangersApplied Thermal Engineering, 2008
- Second law analysis of crossflow heat exchanger in the presence of axial dispersion in one fluidEnergy, 2006
- A new design approach for shell-and-tube heat exchangers using genetic algorithms from economic point of viewChemical Engineering and Processing - Process Intensification, 2005
- Second-law analysis of a wet crossflow heat exchangerEnergy, 2000