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properly sizing an exhaust fan and evaporative cooler in dry cleaning plants - room evaporative air coolers

by:HICOOL     2019-08-05
properly sizing an exhaust fan and evaporative cooler in dry cleaning plants  -  room evaporative air coolers
Almost every dry cleaner uses an evaporation cooler in the factory or in the laundry cleaning area or is commonly referred to as a swamp cooler.
It is very expensive for them to use a refrigerated air conditioner.
Their steam boiler releases thousands of BTU heat to the work area.
Using air conditioners to eliminate so much heat costs thousands of dollars a month.
Because of this, there should be an exhaust fan in the dry cleaner's work area, which is able to perform a complete air exchange about every 1/2 minutes.
Let me give you an example to help you figure out the correct size exhaust fan for your cleaner.
Suppose you rent a space in a shopping mall 25 feet wide and 80 feet deep.
The total square foot of this rental space is 2,000 square feet. ft.
There are heating and air conditioning in the General Front desk sales area.
Next, remove from 2,000 square feet. ft.
Your sales area is 25 feet wide and 15 feet deep, totaling 375 square feet. ft.
This leaves you 1, 625sq. ft.
Boiler Room 10 feet by 10 feet (100 sq. ft. )
The bathroom is 6 feet by 6 feet (36 sq. ft. )
A total of 136 square meters. ft.
Cooling areas are not usually considered. .
This will eventually give you 1,489 square feet. ft.
Exhaust and cooling of floor space in working area.
To get the cubic feet of the work area, you have to measure from the floor to the roof deck.
I'm talking about the roof deck because I never recommend installing the ceiling in the work area.
This will make the room less heat and the work area hotter.
Multiply by 1,489 square meters. ft.
There is a 15 feet distance from the floor to the roof deck, with a total area of 22,335 cubic feet to exhaust.
22,335 divided by 1 (
Number of minutes per air change)
Get the total number of cubic feet of air to be cleared per minute, or CFM.
In this case, I will install a exhaust fan with a rated power of about 15,000 CFM.
The most commonly used exhaust fan in dry cleaners is Grainger fan.
There are Grainger stores in most major cities in the United States, which makes it very convenient to buy fans and parts.
I bought exhaust fans from Grainger for many years.
I also learned that any client of Grainger, even if you have never purchased from them before, can get a 10% discount on their fans. If you e-mail me.
I will tell you how to get this discount at any Grainger store in the country.
Next, you have to replenish the discharged air with an evaporation cooler.
These are very effective in areas with dry climate.
But they also cool down in more humid areas.
In more humid areas, you may only get a temperature drop of 10 degrees, but on a 95-degree day when you work on a Hot Press, the breeze of 85 degrees air will feel good.
In dry cleaning factories, you will usually find them using large commercial or industrial evaporation coolers.
For the work area I marked above, you will need to install a 15,000 CFM cooler.
Keep in mind that when you look at the coolers, they usually give a CFM rating in free air.
Since you may have a piping system that cools the work area, there will be static pressure or restrictions on the airflow of the cooler.
If you use a 15,000 to 16,000 CFM evaporation cooler, you may have a good match with the 15,000 exhaust fan.
The static pressure of the pipeline works usually reduces the CFM level by several thousand CFM.
The reason why this game is good is because you want a slight negative pressure in the work area, in other words, the air discharged from the room is a little more than the air supplied to the room.
The most common evaporation cooler used in dry cleaning work areas is champion 14/21 SD or Essick 14/21 SD.
These are common, probably because they are the cheapest models to sell.
If you are willing to spend a little more, I suggest you use the cooler for a longer period of time.
Champion AS150 or champion AS150 12 is a cooler with a better structure and more lasting.
If you want to explain better why they are excellent coolers, you can type these cooler models in the search engine and find articles about them.
I know that there is a lot of technical information in this article that can be boring for some people, but if you want to cool down the dry cleaning plant, I suggest you use this information.
For decades, I have installed exhaust and cooling systems in cleaners in the Dallas/Fort Worth area, Texas.
These formulas and equipment work well.
I hope the suggestions I have given will help others in the future.
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