Effect of Mechanical Vapour Ejector System on Thermal Performance of Multipurpose Processing Vat during the Manufacture of Khoa

This study evaluated the effect of a Mechanical Vapour Ejector System (MVES) on the thermal performance of a Multipurpose Processing Vat (MPV) during the manufacture of khoa. The investigation was aimed to intensify the process of heat transfer and improve the thermal performance of multipurpose processing vat used for manufacturing various traditional dairy products. The MVES employed MPV was tested under varying air flow rates, steam pressures, and scraper speeds, while maintaining constant feed conditions. Results showed a significant (p<0.05) improvement in evaporation rate (by 17.5%) and overall heat transfer co-efficient, particularly during the concentration stage. Additionally, steam and power consumption were reduced by 12.7% and 10.1%, respectively. The proximate composition of the khoa and its sensory evaluation also indicated enhanced quality in the khoa produced with MVES. These findings suggest that the MVES-integrated MPV is an efficient and energy-saving system for traditional dairy processing.