Modeling and Comparing the Multi-Optimum Results of Plain Fin and Tube Heat Exchanger with and with out Nano Fluids

In the present study, a comprehensive thermal modeling andoptimal design of plain fin-and-tube heat exchanger by usingnano fluids as Al2o3 , Tio2 and Cuo is performed. Theoptimum results state of using nano fluids and without nanois compared. Hence,   NTU method is applied toestimate the heat exchanger pressure drop and effectiveness.The design parameters of this scientific study are selectedas: Longitudinal pitch, transversal pitch, fin pitch, number oftube pass, tube diameter, cold stream flow length, no-flowlength and hot stream flow length. The optimum result ofAl2o3 ,Tio2 and Cuo showed the total annual cost andEffectiveness in comparison without nano fluids, is in samerange, respectively. Using nano fluids showed improvementfor two objective functions. Furthermore, the sensitivityanalysis of change in optimum effectiveness and total annualcost with changes in design parameters of the fin tube heatexchanger is also performed in detail.

کلیدواژه ها:

Fin tube heat exchanger ، Effectiveness ، Cost ، Nano fluids ، Objective function ، Optimization