The newly developed pasteurizer was tested at raw milk inlet temperature of 2, 4, 6 and 8 degree Centigrade and total milk solids of 15 and 18 %. The pasteurization temperature of 78 to 80 degree Centigrade for 20 seconds was used for the testing. The pasteurizer was tested for overall heat transfer coefficient, regeneration efficiency, total heat load and pressure drop. The temperature, pressure and milk flow rates were recorded at an interval of 5 minute during operation through PLC system. The calculated values for the regeneration efficiency, logarithmic mean temperature difference,...