Al2O3 nano particles were added into the water with xanthan and ultrasonic wave to prepare the well-distributed Al2O3-H2O nanofluid. Based on the theory of flash evaporation

an experimental apparatus of dynamic ice-making under vacuum was designed. In the same flash pressure (300 Pa)

it is investigated the vacuum flash experimental characteristics in different conditions

like solid adsorption

nanofluid concentration

particle size and diaphragm metering pump flow. The results shown that the adsorption action had obvious effect on keeping the stability of the pressure and it was useful to capture the water vapor in the system. When the temperature of the cooling medium is lower than the initial temperature of the adsorbent

the adsorbent had better adsorption capacity

but the cooling temperature should not be too low. The larger the concentraction of the nanofluid is

the smaller the particle size is

the better for getting the high ice packing factor of ice slurry. For the same concentration of nanofluid

ice packing factor of ice slurry can be gotten by reasonable to control the diaphragm metering pump flow. In 2%(mass) NaCl

the nanofluid concentration in different particle size should not exceed 0.05%(mass).