DYNAMICS AND CONTROL OF PLATE HEAT EXCHANGERS.

Empirical models are developed for loop flow type plate heat exchanger for input changes in flow rates. The dependence of the model parameters on the operating variables is investigated. The delay time in the model can be made invariant and a best fit value based on experimental data could be used for this purpose. The use of these models in feedback control is demonstrated. The models could be used in the online identification to obtain the initial guess value of the time constant.