Development of Heat Exchanger Models for Predicting Heat Transfer Behaviour of Mixed Refrigerants

The study analyses correlations used to determine the condensation heat transfer coefficient of refrigerant mixtures, R410A and R407C, in a tube in tube condenser. Shah [1], Jaster and Kosky [2], Thome et al. [3], and Dobson and Chato [4] correlations have been considered. The study identifies the flow parameters which influence the accuracy of correlations. The accuracy of the considered correlations is studied against the identified flow parameters. The flow parameters are used as a deciding criterion to select the most accurate correlation for a given case. This leads to a hybrid approach involving multiple correlations. The hybrid approaches are more accurate in comparison to the individual correlations.