【摘要】 真空预冷过程中捕水器能力与真空泵抽气能力匹配决定着预冷过程的质量。通过对预冷过程中水蒸汽为理想气体的假定,分别计算了捕水器和真空泵在匹配时所需要的能耗。在这基础上,对真空预冷系统所需要的能耗进行了计算,并在一台真空预冷实验台上对装载率为60%时的白菜了实验研究,并和理论结果进行了比较。结果表明,在确定的工作条件下,单位时间内的能耗只是与抽气量有关,而整体能耗则取决于所需要预冷的果蔬,与系统参数无关。更多还原

【Abstract】 The matching of the catcher and the vacuum pump determines the pre-cooling quality during vacuum cooling processes.With the assumption of the water vapor resulted from the vacuum cooling to be ideal gas,the energy consumptions of the catcher and the vacuum pump needed in cooling were calculated,respectively.The total energy consumed of the system was also calculated.The vacuum pre-cooling experiment for the cabbage at the 60% package rate was performed.The results show that under a known working condition,the energy consumption per second is only dependent on the sucking rate of the vacuum pump,and the total consumed energy is dependent on the type of fruits or vegetables needed to be cooled and has no relations with the system parameters.更多还原