The relationship between the cow house fan and the cow house ventilation
0010010 nbsp; 0010010 nbsp; 0010010 nbsp; The cowshed ventilation is divided into natural ventilation and auxiliary mechanical ventilation. For areas with hot and humid climate, it is obviously insufficient to rely on natural ventilation only. Therefore, you need to choose the auxiliaryCowshed fanventilation. However, whether it is natural ventilation or mechanical ventilation, it is inseparable from the control of details. Today we will talk about the cowhouse ventilation from a few details.
0010010 nbsp; 0010010 nbsp; 0010010 nbsp; The ventilation rate of the cowshed depends on the ventilation capacity of the cowshed fan, but the uniformity of the air distribution depends on the location and design of the air inlet And regulator. Without changing the ventilation rate (not changing the number of fans in operation), the wind speed of the air inlet (244-305 m / min) can be increased by designing the layout of the air inlet and adjusting the size of the opening. The size of the air inlet can be adjusted manually or automatically.
0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Only when the air inlet is set reasonably and the doors, windows and air leaks in the house are kept airtight can the fan be formed as required Negative pressure. Fresh air outside the house enters the house through the air leakage opening, which reduces the amount of air entering the house through the designed air inlet and disturbs the airflow distribution. Therefore, the cowshed should pay attention to the air leakage.
0010010 nbsp; 0010010 nbsp; 0010010 nbsp; The air inlet of the negative pressure system is taken as an example, which includes continuous trough, box and square inlets. Common continuous trough inlets have adjustment plates to adjust the opening size. The size of the air inlet can be adjusted by adjusting the plate so as to increase the air flow speed and improve the mixing of the air flow. The rigid adjustment plate cannot be bent, which causes uneven airflow distribution. Make the ceiling near the air inlet a smoother surface so that the airflow of the air inlet is not disturbed. Keep screw conveyors, fluorescent lamps, pipes and ditches at equal distances of at least 1. 8 meters from the air inlet. When ribbed ceilings are used, the east side of the ribs should be parallel to the airflow direction. If the ribs are to be installed perpendicular to the airflow, then the ceiling needs to have a smooth surface, lined up, and at least 45 cm from the air inlet.
0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Under negative pressure conditions, at low wind speeds, continuous slotted air inlets are difficult to control. When the airflow is low, evenly spaced intermittent air inlets can improve the airflow distribution. Low wind speeds can cause chaotic airflow distribution, which can harm young calves. The air conditioning system of the cow house fan can replace the continuous trough air inlet in the calf house or provide an auxiliary function for it. The continuous trough air inlet is effective in the cowshed, because the ventilation rate in winter is higher here.