Entropy generation minimization of combined heat and mass transfer devices
Author(s)Lienhard, John H.; Zubair, Syed M.; Narayan, G. Prakash
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This paper details a simple procedure by which the entropy generation in simultaneous heat and mass exchange devices can be minimized. Effectiveness for these devices is defined and a new parameter, ‘modified heat capacity rate ratio’ is introduced. It is found that the entropy generation of a combined heat and mass exchange device is minimized (at constant value of effectiveness) when the modified heat capacity rate ratio is equal to one irrespective of the value of other independent parameters. Several typical examples of the cooling towers have been studied to illustrate this concept. A practical application of the concept is also illustrated using a humidification–dehumidification desalination system.
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering
International Journal of Thermal Sciences
Prakash Narayan, G., John H. Lienhard, and Syed M. Zubair. “Entropy Generation Minimization of Combined Heat and Mass Transfer Devices.” International Journal of Thermal Sciences 49, no. 10 (October 2010): 2057–2066.
Author's final manuscript