You are searching about How To Calculate Air Flow Rate From Pressure And Diameter, today we will share with you article about How To Calculate Air Flow Rate From Pressure And Diameter was compiled and edited by our team from many sources on the internet. Hope this article on the topic How To Calculate Air Flow Rate From Pressure And Diameter is useful to you.
Muc lục nội dung
Kennel Ventilation – Supply and Exhaust
Properly designed ventilation can reduce or eliminate unpleasant odors, reduce bacteria build-up and help keep the house smelling fresh and clean. Your pets will be happier, and you will spend less time drying floors and removing unpleasant odors. If you have trouble understanding the information in this article, please email us on the web at Sun Hill Pet Supplies.
Regardless of the size of your facility, ventilation will play a key role in the first impression of kennel visitors. Simply put, ventilation is the controlled, directed movement of air.
Basics of design:
- Air changes: change all the air in the room four to six times an hour. Calculate the room volume in cubic feet, multiply the result by four, five, or six, then divide by sixty to get the air volume in cfm (cubic feet per minute).
- Exhaust gas collection points: most kennel odors are generated at the same level as dogs, so place exhaust suction points lower than 30 inches to ensure odors are drawn down, away from your nose. However, no lower than twelve inches from the floor to prevent cleaning water from entering the ventilation system.
- How many exhaust collection points: Multiple points throughout the room ensure that air movement has a chance to circulate properly. Remember that we are not talking about the return air duct to your heating system, we are talking about exhaust vents to remove air from the room.
- Air supply: Place the air intake vents high in the room. This allows air to flow downward to the collection points of the exhaust, thus pulling odors down and away from your nose. Remember, the supply air must be filtered and tempered (heated or cooled), not raw outside air. Your HVAC contractor can install a unit that provides enough fresh air into the ventilation system to meet supply requirements.
- Position of air inlet and outlet: Place the inlets above the passage and the exhausts at the back of the ducts in the walls or as pipes running down the walls. If the heating source is a “hot air” system, let one-third of the heated air be introduced on the floor, and two-thirds through the ventilation openings above the passage.
- Exhaust fan type and design: You will want to use a centrifugal wheel blower as the air mover. Fans and blowers that use a blade similar to that of a window fan will not be able to overcome the static pressure created by the ducting required for multiple collection points
- Determine the size of the blower: Create a safety factor by multiplying the cfm you calculated in step #1 by 1.5 to ensure enough air is moving, then choose an exhaust blower to move that amount of cfm to ½” of static pressure or more. Static pressure is resistance to flow of air, usually created by a duct system.
- Channel dimensioning: High air velocity in the system will ensure good air flow so size the ducts for about 2000 fpm (feet per minute) air velocity. The easiest approach to sizing is to determine the duct size needed to handle the total airflow and then set that size as the primary duct throughout the building. Determine the desired number of drops and divide the area of the primary channel by the number of drops. Each drop is then sized according to that area. Use this formula to determine primary duct size: (cfm / 1500fpm) x 144 = duct area in square inches
Formula Information: · http://www.Grainger.com is a great resource for blowers.
· Area of a circle: radius squared times 3.14 ( [r x r] x 3.14) 3″ round duct area example: (1.5 x 1.5) x 3.14 = 7.065 square inches
· Convert square inches to square feet: divide the square inches by 144. From the example above, 7.065 square inches divided by 144 = 0.049 square feet.
Example:
1. Kennel room is 20 ft x 15 ft with a 10 ft ceiling: 20 x 20 x 10 = 4000 cubic feet
2. Five (5) air changes per hour = 4000 x 5 = 20,000 cubic feet
3. Determine cfm (cubic feet per minute) 20,000 / 60 = 333 cfm
4. Air flow safety factor: 1.5 x 333 = 500 cfm
5. From Grainger’s: http://www.grainger.com/Grainger/items/2C946 This blower puts out 537 cfm at ½” static pressure, costs only $165.38, and plugs into most outlets.
6. Primary duct size in square inches: (500 cfm / 2000 fpm) x 144 = 36 square inch duct. You can use a 6’x 6″ square channel or a 7″ diameter round channel.
Video about How To Calculate Air Flow Rate From Pressure And Diameter
You can see more content about How To Calculate Air Flow Rate From Pressure And Diameter on our youtube channel: Click Here
Question about How To Calculate Air Flow Rate From Pressure And Diameter
If you have any questions about How To Calculate Air Flow Rate From Pressure And Diameter, please let us know, all your questions or suggestions will help us improve in the following articles!
The article How To Calculate Air Flow Rate From Pressure And Diameter was compiled by me and my team from many sources. If you find the article How To Calculate Air Flow Rate From Pressure And Diameter helpful to you, please support the team Like or Share!
Rate Articles How To Calculate Air Flow Rate From Pressure And Diameter
Rate: 4-5 stars
Ratings: 1173
Views: 14649510
Search keywords How To Calculate Air Flow Rate From Pressure And Diameter
How To Calculate Air Flow Rate From Pressure And Diameter
way How To Calculate Air Flow Rate From Pressure And Diameter
tutorial How To Calculate Air Flow Rate From Pressure And Diameter
How To Calculate Air Flow Rate From Pressure And Diameter free
#Kennel #Ventilation #Supply #Exhaust
Source: https://ezinearticles.com/?Kennel-Ventilation—Supply-and-Exhaust&id=683596