What is the role of axial fans and centrifugal fans in mechanical ventilation?
1 due to the difference between temperature and food temperature, the first ventilation time to be selected in the day to reduce the grain temperature and temperature gap, reduce the occurrence of condensation. After the ventilation as far as possible in the evening, because the ventilation is mainly cooling, the evening the atmosphere is relatively high humidity, low temperature, which reduces the water loss, and make full use of the low temperature at night to improve the cooling effect The
5 to axial fan for the advantages of slow ventilation: cooling effect is good; unit energy consumption is low, in the promotion of energy-saving today is particularly important; easy to grasp the ventilation time, not prone to condensation; do not have a separate fan, convenient and flexible. Disadvantages: due to the small amount of air, ventilation time is long; precipitation effect is not obvious, high water grain should not use axial fan for ventilation.
4 for slow ventilation of the food must be cleaned by shaking sieve, and into the warehouse of food must be promptly cleaned automatically caused by the impurity area, or easy to cause local ventilation uneven.
3 with axial fan for slow ventilation, due to the axial flow fan air volume is small, the other is the poor heat of the conductor, the initial ventilation prone to individual parts of the ventilation is slow, with the ventilation to continue the full grain temperature will gradually balance.
2 with centrifugal fan ventilation may occur in the early doors and windows, wall condensation, and even surface surface of a slight condensation, as long as the stop fan, open the window, open the axial fan, if necessary, flip the grain, the warehouse of hot and humid air exclusion Outside can be. And with axial fan for slow ventilation will not appear condensation phenomenon, only the middle of the grain temperature will rise slowly, with the ventilation to continue grain temperature will be a steady decline.
