ALL >> Service >> View Article
Industrial Make-up Air Handling Fans
ABB Blower Co. developes Make-Up Air Unitss for larger industrial plants ventilation requirements.
Negative Air Pressure in industrial manufacturing facilities can create problems such as:
* Exhaust fans losing performance, as the building pressure becomes negative.
* Pilot light outages and exhaust system failure on natural draft gas equipment.
* Cold air drafts and infiltration of dirt and contamination from outside.
* Difficulty opening or closing exterior doors.
ABB Blower air-handling units (AHU) can be used effectively for negative pressure control at manufacturing facilities:
Space Pressure Control is used to minimize and control the exchange of air between the building and the outside environment or from one building area to another. This may be accomplished in three ways:
- Constant air supply with variable-speed exhaust;
- Variable air supply with constant-speed exhaust;
- Variable Return-Air.
Constant air supply with variable-speed exhaust is recommended where a hot or contaminated environment must be ventilated while maintaining room ...
... pressure. Unit may be interlocked to that it only operates with the exhaust system.
Variable Air Supply with constant-speed exhaust may be preferred where fume exhausters or fume hoods are used to provide critical ventilation of contaminants from a “clean” environment while make-up air is used to maintain a positive pressure to prevent infiltration.
In either case, when the system is enabled, a pressure sensor in the building space monitors room pressure. When a high or low pressure reading is detected, the air supply or exhaust is adjusted to compensate.
When controlling a Variable Air Supply unit (or VAV Unit - Variable Air Volume), two methods are available:
- Damper Control - Unit discharge damper is adjusted using the damper motor.
- VFD (Variable Frequency Drive) – Controller adjusts the speed of the blower motor Discharge Damper adjustment is an older method of controlling discharge air volume. Its main advantage is that it only requires positional control of a small discharge damper motor. The major disadvantage is the wasted Horsepower of the blower motor at lower delivery rates.
In recent years, fan speed control using VFDs has become economical. In this application, a standard energy efficient motor is usually adequate down to 75% of normal motor speeds. For a fan speed down to 25%, a premium efficiency motor is required. Inverter duty motors are not usually necessary since at 25% of normal fan speed, air delivery is minimal.
Variable Frequency Drives are also programmable. They are used to provide soft starts and to ramp motor speed up or down in response to signals from the control system.
Finally, in a generally “clean” environment without a critical need to remove large quantities of contaminants, a simple solution to building pressurization is a Return Air Unit with the return air damper motor controlled by building a pressure sensor. When building pressure increases, more inside air is returned through the unit, relieving the pressure. When building pressure falls, more outside air is supplied to the building in order to “pump up the pressure”. Precise control of building pressure by a single piece of equipment can thus be achieved.
Additional information can be found at the ABB Blower company web site http://www.abbblower.com/special/fume_hood.html
Susann Terlitski
Designer of Industrial Air Handling Units
ABB Blower Co.
nis@primus.ca
http://www.abbblower.com/company/company_profile.html
http://www.abbblower.com/special/index.html
Add Comment
Service Articles
1. Udyam Registration Annexure Certificate Online In IndiaAuthor: shweta sahu
2. The Ultimate Guide To Women's Haircut In North Carolina And Men's Haircut Services In Cary
Author: a1salon
3. European Artistic Hair Designer: North Carolina's Premier Luxury Hair Salon Experience
Author: a1salon
4. North Alabama Restorations, Inc
Author: Mark Jewell
5. Understanding Solar Power Systems
Author: energysolarinc
6. Metal Backlight Signage Boards And Gold Platinum Metal Signage: Elevating Brand Luxury And Visibility
Author: ledsignboardz
7. Led Display And Interior Signage Boards In Hyderabad: Elevate Your Brand Presence
Author: ledsignboardz
8. Enhance Your Brand Presence With 3d Acrylic Signage Boards And Building Name Signage
Author: ledsignboardz
9. Uv Digital Printing Signage: Enhance Your Brand With High-quality Glow Sign Boards
Author: ledsignageboards
10. Sign Board Manufacturers In Hyderabad: Your Guide To Led Signage Solutions
Author: ledsignageboards
11. Ultimate Guide To 3d Acrylic And Led Sign Boards: Top Manufacturers
Author: ledsignageboards
12. A Guide To Acp Cladding Signage Boards And Gold Platinum Metal Signage
Author: ledneonsigncompany
13. Led Display In Hyderabad: Transform Your Business With Eye-catching Led Display Signage
Author: ledneonsigncompany
14. 3d Acrylic Signage Board: Enhance Your Brand’s Visual Impact
Author: ledneonsigncompany
15. Black Magic Experts In Koramangala
Author: Vasudev12