Performance prediction on the finned-tube dry cooler in winter period

A mathematical model is presented to predict the behaviour of condensation and frost formation on heat transfer surfaces by simultaneously considering the condensing and frost layer. The model employs one-dimensional transient formulation based upon a local averaging technique, taking into account the variation of the frost density and thickness. The presented model is validated by comparing to experimental data provided by the dry cooler manufacturer. It is found that the model can predict the heat transfer performance of the dry cooler with an accuracy of within 2.19%. The dry cooler’s heat transfer performance are predicted at different air and water flow rates operating with water as heat transfer fluid during the winter period. The model and discussion are helpful for the operation of such a kind of dry cooler with water during the winter period.