The cooling of the air change is a kind of fresh air that continues to send a large amount of coolness and filtering in the workshop. At the same time, the stuffy and dirty air is discharged, so that the effect of ventilation and cooling in the workshop can be achieved.

What is changing wind?
The change of wind refers to the process that the air in a specified space in the specified space is called the wind change. The use of an open cooling system can achieve the effect of one stone. The first is to reduce the air temperature, and the other is the effect of changing this space.
The exchanges should be determined according to the type and environment of production. The table below shows the recommended design required for different working environments.
Exchanges
The exchanges are a metering unit, which refers to the ratio of the amount of the amount of air to the capacity of the space in a specific space. It is usually expressed as:
Whenevers (number of times per hour) = The volume of air supply/space per hour
The calculation of the exchanging rate is to determine the quality of its ventilation compared with the number of referrals of the workshop.

Humidity control during the cooling process of the plant
What is humidity?
Technically speaking, the relative humidity and absolute humidity are existed. The relative humidity represented by%is the ratio of the actual water steam content and the amount of air in the air. The absolute humidity in dry air represented by G/KG refers to the content of water steam in a unit of air. It is a parameter of the actual water steam content in the air.
About absolute humidity
The main reason for the increase in humidity increase is the increase in absolute humidity and wet content. For example, when the air cools from point A to point B, the wet content is increased from 20 grams/kg to 23.5 grams/kg of dry air. Although the increase is small, it must be controlled.

In the semi -closed or fully closed plant, the amount of wet will increase. Therefore, the cold air sent must be discharged from the form of mechanical exhaust to minimize the moisture content of the air.