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The results of analytical studies on the hydraulic performance of chevron type plate heat exchanger for different aspect ratios, Reynolds number, maldistribution parameters, no of channels, fixed port size, and flow rates using water as the working fluid in the channels have been presented. Some analytical results have been validated with the experimental results available in the literature. Pressure drop in the heat exchanger is found to depend on flow rate, numbers of channels and aspect ratio. Friction factor in a channel also depends on flow rate of fluid and aspect ratio. The flow distribution and pressure drop in the U-type arrangement plate heat exchangers are studied for a wide range of Reynolds number (200-5800). The flow maldistribution brings about an increase in pressure drop across the heat exchanger.

The present work deals with the experimental study of a single pass U-type chevron plate heat exchanger using liquid-liquid combination in both the channels for the range of Reynolds numbers, 800-5900. The influence of Reynolds number, pumping power and number of plates on the hydraulic and thermal performance of plate heat exchager are presented. Results are predicted for a chevron angle of β=60 o and fixed port size dp =25.4 mm for a different set of plates, namely, 15, 21, and 27 under two different conditions viz. isothermal and non-isothermal. The present results of non-dimensional channel velocity and Nusselt number are compared with the analytical results of Bassiouny and Martin and Nusselt number correlation of Wang and Sunden, respectively. At a Reynolds numbers of 3900, enhancement in Nusselt number on increasing number of plates from 15-21 and 21-27, is found to be 56% and 19%, respectively. Based on experimental data, correlations for Nusselt number and friction factor are also developed.

Heat transfer enhancement techniques are widely used in the applications of air conditioning, refrigeration, Power stations, Radiators and chemical reactors. Therefore several techniques have been used to enhance the heat transfer rate in order to increase the efficiency of the heat exchanger. One of the main tools used in heat exchanger to create turbulence flow with the help of corrugated tubes. The current paper investigates about the different arrangements of corrugated tubes used in tube heat exchangers in the recent years are studied at the turbulence zone and also the overall enhancement ratio.