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基于CFD技术的橙汁高温短时灭菌后冷却工艺优化

作  者:
谢晶;汤毅;王金锋;张利平;顾超恒;张政
单  位:
上海水产品加工及贮藏工程技术研究中心
关键词:
果汁;高温短时灭菌;冷却;CFD
摘  要:
利用FLUENT软件对橙汁高温短时灭菌后的冷却工艺进行模拟.针对果汁在120℃高温灭菌工艺后中心最低温度达到80℃时进行冷却计算,得出了不同温度时冷却的最理想时间条件:20℃(293K),14min;15℃(288K),13min;10℃(283K),13min;5℃(278K),12min;0℃(273K),12min.同时根据逆卡诺循环,计算了各种理想冷却工艺的能耗,能耗最优的冷却工艺为20℃(293K)、14min.
单  位:
Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation,College of Food Science and Technology,Shanghai Ocean University,Shanghai 201306,China
关键词:
orange juice%high-temperature short-time(HTST) sterilization%cooling%computational fluid dynamics(CFD)
摘  要:
A simulated cooling process for orange juice subjected to high-temperature short-time(HTST) sterilization was established with FLUENT software.The optimum cooling conditions for reducing the central temperature of HTST sterilized milk to a minimum of 80 ℃ were calculated as follows: 20 ℃(293 K) for 14 minutes,15 ℃(288 K) for 13 minutes,10 ℃(283 K) for 13minutes,5℃(278 K) for 12 minutes and 0 ℃(273 K) for 12 minutes.Based on Carnot efficiency from the reversed Carnot cycle,energy consumption in these different cooling processes was calculated to identify 20 ℃(293 K) for 12 minutes as the best choice.

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