HEAT AND MASS TRANSFER ANALYSIS OF COLUMNAR VEGETABLES IN VACUUM COOLING
A mathematical model is developed for the heat and mass transfer of columnar vegetables during vacuum cooling. It includes two sub-models, which describe pressure decreasing of the vacuum chamber and heat transfer of vegetables respectively. The variation histories of the total pressure of the vacuum chamber and product temperature are calculated. Experiments are carried out on vacuum cooling of long columnar vegetables aslo. The difference between the simulated pressure and measured pressure is within 200Pa when the pressure ranges from 3000Pa to 600 Pa, while the difference between simulated temperature and measured temperature is less than 1.5℃. The results prove that the mathematical model is reasonable to predict the vacuum pressure and temperature profiles for analysing vacuum cooling process of vegetables. Also the research results provide some basic rules for flow and heat transfer of evaporation process of columnar vegetables during vacuum cooling.
Q.R.YANG Y.ZHANG
College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, 266071, P. R. China College of Mechanical and Electrical Engineering, Qingdao University,Qingdao, 266071, P. R. China
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）