# News

Home  > INFO CENTER  > News  >

# Air Supply Algorithm For Clean Room HVAC System

2022-03-22

Class 100 is equivalent to ISO5, and the ventilation rate is 360 times. The algorithm is that the room volume X360 is equal to the air supply volume.

10000 class is equivalent to iso7 class, and the ventilation times are 25-30 times. The algorithm is that the room volume X25 is equal to the air supply volume.

Class 100000 million is equivalent to class iso8-iso9. The number of machine changes is 15. The algorithm is that the room volume x15 is equal to the air supply volume

The following is the algorithm of cooling capacity

The refrigerating capacity has a great relationship with the area. It is 110-180 watts per square meter. It can be calculated in dynamic or static state. What are dynamic and static,

For example, this room is relatively closed, and few people go in. It belongs to static state, so the number of watts per square meter will be less.

Dynamic is that there are often people in and out of this room. Every time the door is opened and closed, it will affect the indoor temperature. In this way, it is necessary to match a larger wattage. The static space is about 130 watts per square meter, which is the room. For example, 10 square meters is 10x130, which is equal to the cooling capacity.

The dynamic space is about 170 watts per square meter, which is the room. For example, 10 square meters is 10x170, which is equal to the cooling capacity.

An input power equal to about 750 watts.

Then, why is it necessary to install an air valve in some places in the air duct direction diagram, and what is the role of the air valve? For example, the room needs 5000 air volume, which is equal to five high-efficiency air supply outlets with 1000 air volume. If there is no air valve installed on the pipe of the air duct, it may send 6000 or more air volume to the room. At this time, the air valve plays the role of regulating the air volume, Adjust the air volume to just the air volume used in the room, such as 5000 air volume.

What is relative humidity

Relative humidity is the current degree of water vapor saturation in the air,

For example, now the relative humidity is 80%, so the current water content in the air is very high, people will feel wet and it is not easy to dry clothes

For example, if the relative humidity is 20%, the current water content in the air is very low, people will feel very dry, and it is easier to dry clothes.

The air temperature is 28 °, the saturated water vapor pressure is 3.771kpa, and the water vapor pressure in the air is 3.016kpa. According to the calculation formula, the relative humidity in the air of Xi'an is 80%, and 20% humidity can be absorbed in the air.

How to calculate the size of duct

There is a detailed table for calculating the basic air supply volume. The known method is,

For example, for an air conditioning unit with an air volume of 20000, its wind speed is 12 levels per minute, and the calculation of the initial air duct size is

20000 ÷ 12 ÷ 3600 = area of air duct (3600 seconds equals 1 minute)   Suzhou Pharma Machinery Co.,Ltd.

2022/03/13

David

Chat Online
Chat Online