Jim Grant Forum Moderator 119 Posts
Re: How can we predict changes in performance on heat exchangers?10 November 2009 at 1:29pm
The equations for energy balance and heat transfer can be used to predict changes in performance. For this level of estimate it is probably safe to assume a constant value of overall heat transfer coefficient. This assumes no significant change in flow rate of either fluid -- corrections can be made if you know the change in flowrate of either fluid.
Sensible heat transfer energy balance: Q = Mh*Cph*(Ti-To) (hot side) = mc* Cpc *(to-ti) (cold side)
Heat Transfer: Q = Uo * Area * LMTD