Multi-Objective Constructal Optimization for Marine Condensers

Huijun Feng, Wei Tang, Lingen Chen, Junchao Shi and Zhixiang Wu
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Huijun Feng: Institute of Thermal Science and Power Engineering, Wuhan Institute of Technology, Wuhan 430205, China
Wei Tang: College of Power Engineering, Naval University of Engineering, Wuhan 430033, China
Lingen Chen: Institute of Thermal Science and Power Engineering, Wuhan Institute of Technology, Wuhan 430205, China
Junchao Shi: College of Power Engineering, Naval University of Engineering, Wuhan 430033, China
Zhixiang Wu: College of Power Engineering, Naval University of Engineering, Wuhan 430033, China

Energies, 2021, vol. 14, issue 17, 1-18

Abstract: A marine condenser with exhausted steam as the working fluid is researched in this paper. Constructal designs of the condenser are numerically conducted based on single and multi-objective optimizations, respectively. In the single objective optimization, there is an optimal dimensionless tube diameter leading to the minimum total pumping power required by the condenser. After constructal optimization, the total pumping power is decreased by 42.3%. In addition, with the increase in mass flow rate of the steam and heat transfer area and the decrease in total heat transfer rate, the minimum total pumping power required by the condenser decreases. In the multi-objective optimization, the Pareto optimal set of the entropy generation rate and total pumping power is gained. The optimal results gained by three decision methods in the Pareto optimal set and single objective optimizations are compared by the deviation index. The optimal construct gained by the TOPSIS decision method corresponding to the smallest deviation index is recommended in the optimal design of the condenser. These research ideas can also be used to design other heat transfer devices.

Keywords: constructal theory; marine condenser; pumping power; entropy generation rate; multi-objective optimization; generalized thermodynamic optimization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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