Performance analysis of plate type heat exchanger for milk pasteurization

Abstract

Pasteurization is the requirement of food industries to ensure the product safety and increase product shelf life. Milk is the sensitive and perishable liquid which requires high safety and proper processing. Pasteurization is one of the steps for increasing shelf life of milk and inactivating the pathogenic bacteria. This work evaluated the regenerative efficiency, steam consumption and regenerative temperatures of four Plate Type Heat Exchangers (PHEs) installed in pasteurization units in a commercial dairy plant with the handling capacity of ten hundred thousand liters of the milk per day. Moreover, the unknown temperatures of regenerative circuit in PHEs were calculated. The purpose of the analysis was to compare the results of steam consumption, regenerative temperatures and regenerative efficiencies of all PHEs. Further, to find the regenerative temperatures by calculation, the results demonstrated that regenerative efficiency is increasing with increase in regenerative temperatures, and less amount of steam is consumed if the regenerative temperature is near to the required temperature.Pasteurization is the requirement of food industries to ensure the product safety and increase product shelf life. Milk is the sensitive and perishable liquid which requires high safety and proper processing. Pasteurization is one of the steps for increasing shelf life of milk and inactivating the pathogenic bacteria. This work evaluated the regenerative efficiency, steam consumption and regenerative temperatures of four Plate Type Heat Exchangers (PHEs) installed in pasteurization units in a commercial dairy plant with the handling capacity of ten hundred thousand liters of the milk per day. Moreover, the unknown temperatures of regenerative circuit in PHEs were calculated. The purpose of the analysis was to compare the results of steam consumption, regenerative temperatures and regenerative efficiencies of all PHEs. Further, to find the regenerative temperatures by calculation, the results demonstrated that regenerative efficiency is increasing with increase in regenerative temperatures, and less amount...