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ABSTRACT
The optimisation of heat exchanger is an important issue. So, the optimum size of counter flow surface condenser is found in this research work for Maral Overseas Ltd by entropy, exergy and entransy theories. In this work, effectiveness of heat exchanger, number of transfer units, entropy generation, entransy dissipation, entransy dissipation-based thermal resistance, entransy dissipation number and entransy effectiveness for hot/cold fluid sides with outlet temperatures of fluids are found for various 4L/D ratios. And then the optimum value of 4L/D ratio is found for the surface condenser. Entransy dissipation number and entransy-based thermal resistance both must be as low as possible for proper design. It is observed that when 4L/D ratio increases then EDN, entransy dissipation-based thermal resistance, outlet temperature of hot fluid and entropy generation decrease but NTU, effectiveness and outlet temperature of cold fluid increase. This research work is concluded as when 4L/D ratio increases with one unit, EDN values decrease with 0.05–0.02, but after some time, when 4L/D ratio increases with ten units, EDN values decrease with only 0.01. Finally, the optimum condition of 4L/D ratio for surface condenser is found, which is 40. Computer software is also developed to eliminate hectic calculations and human errors for performance analyses of heat exchangers.
Acknowledgements
This research work was done by research scholar at Sushila Devi Bansal College of Technology, Indore, Madhya Pradesh, India. There is no direct/indirect funding for this research work. Authors appreciate the Management of Maral Overseas Ltd, Dharampuri, Indore, for proving useful information/data which are used in this work.
Disclosure statement
No potential conflict of interest was reported by the authors.