Process side Delta temperatures across my heat exchangers are higher than design values. And we are operating them on higher inlet temperatures of process side. How will these conditions affect my system?
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Re: How can we predict changes in performance on heat exchangers?
10 November 2009 at 1:29pmThe 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
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