Paper Details

The demand for high performance heat exchange devices having small special dimensions is increasing dueto their requirement in applications in aerospace and automobile vehicles, cooling of electronic equipment and artificialorgans. The accurate prediction of the thermal performance of a compact heat exchanger in the design stage is highlydesirable for most aerospace applications. When an extended surface is needed on only one fluid side or when theoperating pressure needs to be contained on one fluid side, a plate-fin exchanger may be selected. PFCFHE is havingdifferent fin surfaces like, rectangular fins, triangular fins, offset strip and perforated fins having rectangular crosssection for plate fin surfaces. The paper is concerned with the performance evaluation of such plate fin heat exchangers(PFCFHEs), having rectangular and triangular fins for plate fin surfaces with fin densities varying between 16 to 20 finsper inch. The thermal performance of each configuration is based on the ε-NTU method. The extensive experimentalresearch data of Kays and London available in the form of graphs were translated into algebraic relations fordeveloping computational models. From the present work, a generalized heat transfer correlations is proposed based ongeometrical parameters for the effectiveness of the heat exchanger. The generalization is with respect to the different finsurface geometry and not with the different combination of hot and cold fluids. The correlation is applicable to air-to-gasor gas-to-air or combination of both configurations having both the fluids unmixed. Further, guidelines were proposedfor an easy way of designing a PFCFHE by modes of geometrical based correlations, and the same was compared withtraditional ε-NTU method.

Shah Niyati M, Shah Khyati, “PERFORMANCE EVALUATION OF PLATE FIN CROSS FLOW HEAT EXCHANGER WITH DIFFERENT FIN SURFACES”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 3, Issue 4, pp. 414-420, April 2016.