Axial Roof Ventilator – Page 2

Proper Blower Fan Ventilation

The air we breathe indoors, the air that directly surrounds us, has a huge effect on a person who lives in it. Proper ventilation is essential and underplayed in the efficiency and health of a home or office. The following are some reasons why an HVAC contractor should be consulted to improve ventilation:

CLEANER

This is the most obvious reason for proper ventilation. What you put into your body tends to be what you get out. Poor air quality in the home or office means sitting in unhealthy air for the better part of your time. The pollutants and germs that float through the air from building materials and biological sources contribute to the quality of air, and thus the occupant’s health and productivity. A ventilation system with an effective air conditioning system will keep your Even if that air conditioning system is installed, however, it must be kept up as dirty filters and poor air conditioning maintenance will have just as detrimental an effect on health.

SIMPLIER in Air Control

A fairly unknown truth of ventilation is that not only does it improve air quality but it allows greater control of pressure in the home. To clarify, ventilation is not just about having more air coming in, but it is also about managing the air that is already in the environment. Air pressure control is a pretty useful tool for a few reason. The tighter the pressure, the easier it is to control the temperature and air circulation. In high air pressure, just a single fan or low air conditioning usage can effectively cool a larger area. However, in a looser, low air pressure environment, the air conditioning systems will have to work twice as hard to circulate the cool air. This also goes for purified air as the purified air will be circulated easier in a more condensed in a high pressure environment. The second reason is that ease of circulation means lower electric bills which leads to…

GREENER

… a better impact on the environment. Better ventilation and air control decreases the need to waste energy on running and air conditioning system, and filtration prevents VOCs (Volatile Organic Compounds) from building materials to leak into the environment and your air supply. Also, with green options being such a trend in home building, green energy systems are becoming a must to keep your home’s value at a competing level. Thus keeping your ventilation repaired will save some money as well as having a more positive impact on the environment.

Fresh air is just better for your health and overall quality of life. An intact ventilation system will improve health, your environmental impact, and decrease cost to run air conditioning systems. Improving your ventilation systems by calling an HVAC contractor or air conditioning repair specialist is something that should be done immediately, especially before summer kicks off and the air conditioning is running at its maximum.

For more information about proper ventilation and how it can help improve indoor air quality, visit Industrial High Pressure Blower Company web site http://www.highpressureblower.net/OEMFans.html

Alex Todorovo
Industrial Mechanical Process Engineer
High Pressure Blower Co.
alex.todorov@canadablower.com
http://www.highpressureblower.net/canadianbloweraxial.html
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Proper Ventilation

fan blower ventilator high temperature pressure industrial super transfer air gas positive negative heavy duty capacity process

alex.todorov@canadablower.com

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Industrial Propeller Fans and Industrial Blowers

Electrical generators require the most reliable equipment for their air-cooling and ventilation needs. The fans used in these systems are mounted onto gas-turbine generator packages for use in power plants as well as on cruise ships, oil rig platforms, and mobile generators. These systems are loaded onto tractor-trailer rigs or barges and moved to a site to generate power for events like the Super Bowl and concerts. Manufacturers of these gas-turbine generators are realizing it pays to have the right fan for the job from the start and are turning to Buffalo Fan to provide these unique solutions.

Resilient Industrial Blowers

A key requirement for these applications is that the fans need to be exceptionally corrosion resistant to withstand these severe environmental factors.

Noise attenuation is a major issue for power generators, both to protect workers’ hearing and to keep operation at the quietest level for any surrounding residential or business communities.

High Performance Fans & Blowers

Power generation is a complex process. The power generation fan / blower equipment should be tough enough to avoid operational failure and to minimize installation and repair work. The rugged, high performance fans Buffalo Fan provided to a state-of-the-art hybrid energy center, were ideal for the task. Aerovent was chosen for this project because of their reputation for building large custom fans for extreme industrial applications. The energy center’s primary requirement was that its chosen vendor be able to design and build a set of the most rugged, efficient roof ventilators within budget. Most roof ventilator fans last between 10 and 20 years when properly maintained. Because of the permits and cost involved in performing maintenance work on the roof of a power plant, they wanted their fans to have a longer life span (up to 40 years). This lifespan requirement meant that the fans had to be constructed using industrial grade materials and components.

Propeller Fans

Northern Fan propellers provide equal airflow in both directions. Other companies’ fans have a standard-exhaust one-direction propeller and are run backwards for the supply mode, producing about 40 percent of exhaust-mode airflow. ABuffalo Fan blowers produce 100 percent airflow in either direction. Aerovent also produced an integrated electrical control system guaranteed to work with its fans instead of the power plant having to acquire a separate system from another source. The system features an onboard starterdisconnect switch, which boosts the motor’s start and can be easily disconnected.

Industrial Blower Safety

Fire safety is a challenge in any environment, and especially so in a power plant. In case of a fire, the first priority is to ensure the safety of employees. Another goal is to be able to salvage expensive equipment in the building. With ventilation fans, if the motor fails during a fire, it is more beneficial if the fan’s dampers automatically fail in the “open” position, and allow smoke to escape.

Custom Industrial Fan Design

Northern Fan’s expertise in custom-building fans for complex applications, like this energy center, allowed them to design and construct a special fire damper for the fans. When the motorized damper is activated, a metal linkage arm attached to the damper blades moves to open or close the damper.

Northern Fan Co. custom made damper features a fusible linkage arm with a “soft metal” section in the link. When temperatures reach 212 degrees (as in the case of a fire), the soft metal plate fails, breaking the linkage, and a heavy counter weight swings the damper into the “open” position.

Additional information can be found at the Northern Fan company web site http://northernindustrialsupplycompany.com/company.html

Oleg Tchetchel
Industrial Air Handling Systems Engineer
Northern Fan Co.
nis@primus.ca
http://www.northernindustrialsupplycompany.com/products/heat_exchangers.html
http://northernindustrialsupplycompany.com/products/humidifiers.html

Turbo Pressure Blower

nis@primus.ca

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buffalofancom

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Industrial Blower Fan Ventilation System

This article will discuss options for improving energy efficiency when designing an HVAC system and selecting a fan. HVAC design engineers face many choices throughout the planning process, perhaps few as crucial as that of fan equipment, a principal consumer of energy.

Industrial Blowers & Fans Flow Rates

Flow rates are predetermined based on space type and occupancy. Although local codes determine minimum requirements for HVAC systems, ASHRAE Handbook – HVAC Applications provides general design criteria for various commercial and public buildings. These criteria include air movement, room circulation, noise, and filter efficiency. Although all are important, room circulation, in air changes per hour, typically determines airflow requirements. Because flow rate is driven by design criteria, a design engineer’s primary means of reducing energy use is to minimize the static pressure needed to move air through a system.

Air Movement and Control Association (AMCA) International defines system pressure loss as “the sum of the static-pressure losses due to friction, shock, dissipation of velocity pressure at the system discharge, and the static-pressure differences between the entry and discharge openings of an air system. The static pressure a fan must overcome is dependent on many variables, only some of which the design engineer can control. The location of equipment often is determined by the architect and, therefore, limits the engineer’s options.

Blowers and Fans Duct Configuration

Duct configuration and fittings used to connect components are large contributors to static pressure. Other sources of system pressure loss are balancing and control dampers, variable-air-volume (VAV) boxes, diffusers, louvers, coils, filters, and other components in an air stream. Given that velocity pressure is proportional to the square of velocity, pressure loss in most of these components is proportional to velocity squared. This makes size an important factor, as cross-sectional area dictates fluid velocity. For example, reducing air velocity throughout a system by 10 percent would result in a 20-percent reduction in system static pressure. With air power proportional to pressure, this would equate to a 20-percent reduction in energy consumption.

In addition to accounting for all static-pressure loss in a system and achieving required room airflow, a design engineer must adhere to Section 6.5.3 of ANSI/ASHRAE/IESNA Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings, which limits the power (horsepower) a fan can consume per cubic foot per minute of airflow the fan generates. With flow requirements defined, a design engineer must limit system static pressure to meet this power limitation.

System Effect and Industrial Fans and Blowers

A major contributor to energy consumption that often is ignored is system effect. AMCA International defines system effect as “a decrease in fan performance capability, observed as a pressure loss, which results from the effect of fan-inlet restrictions/obstructions, fan-outlet restrictions, or other conditions influencing the performance of the fan when it is installed in a system.”2 System effect is a reduction in a fan’s ability to generate pressure and can be looked at as an additional system pressure loss. It can lead to underperformance, excessive noise, and vibration in a fan and system.

System Effect and Fan Curves

System effect can be described by its impact on a fan curve. Fan curves are produced from laboratory testing, with fans configured for ideal installations. Testing is performed in accordance with ANSI/AMCA Standard 210-07/ANSI/ASHRAE Standard 51-2007, Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating. A fan curve displays performance for a constant speed (revolutions per minute) in terms of static pressure vs. volumetric flow rate. In Figure 1, the intersection of the system-resistance curve and the pressure curve is the operating point of the fan. To move along the system curve to alter fan performance, one must increase or decrease fan speed accordingly. Operating power is where the power curve intersects with a vertical line running through the operating point.

Ideal Industrial Blower Fan Inlet & Outlet Conditions

The ideal inlet and outlet conditions under which fans are tested rarely are seen in the field. As a result, a fan will overperform or underperform in terms of flow rate, static pressure, or both. In Figure 2, a suitable fan was selected, but system effect was ignored. The blue lines represent how the fan would perform under AMCA International test conditions. Actual measured performance is indicated by the red dot. The red line shows how the fan would perform in an AMCA International air test when operating at design speed, but takes into account system effect. The only way to achieve the desired performance is to speed the fan to the rate designated by the green line. The consequence is a higher operating speed, higher brake horsepower, and higher sound levels.

Propeller Fan & Tube Axial Fan Selection

Another key to reducing power consumption is fan selection. Generally, propeller or tube-axial fans are more efficient for relatively low static pressures, while centrifugal-type fans are used for relatively high static pressures. Too often, fan selection is based solely on first cost. The consequence is that a relatively small-diameter, high-speed fan is used. A small fan operating at a high speed generally requires more operating power and produces more noise than a large fan operating at a low speed.

Most of the energy lost in a system is converted to heat. For example, mechanical and electrical energy losses in a fan motor raise the surface temperature of the motor. If the motor is in an air stream, the heat will be transferred directly to the air.

Belt Dive Propeller Fans and other Blower Fan Systems

In a belt-driven system, losses are the result of belt friction, slippage, and / or flexing. All such losses are converted to heat and, if the belt drive is in an air stream, increase the temperature of air. Fan losses quantified by fan efficiency contribute to air-temperature rise as well. As a fan works on a fluid, the friction attributed to the airflow decreases the fan’s efficiency and creates heat. As the efficiency of a system decreases, air-temperature rise increases. In a cooling application, this means increased energy consumption on the part of the compressor. Minimizing inefficiencies results in energy savings. It is the engineer’s responsibility to minimize total system pressure through proper design and layout. This involves balancing economics and efficiencies in specifying a fan. But not all responsibility resides with the engineer. The contractor must ensure appropriate equipment is installed and not base decisions solely on the lowest bid. The contractor needs to be aware of the consequences of poor installation and minimize system effects.

The losses accrued in a system directly affect the system’s power consumption while indirectly increasing the energy consumed by other processes. Energy losses in the form of heat equate to higher operating costs.

Because performance conditions are mandated by codes, proper system design, equipment selection, and installation are the most effective means of minimizing inefficiencies and saving energy.

Additional information can be found at the Northern Industrial company web site http://www.northernindustrialsupplycompany.com/products/air_handling_units.html

Oleg Cthetchel
Canadian Ventilation HVAC Engineer
Northern Industrial Co.
asap@buffalofan.com
http://www.northernindustrialsupplycompany.com/request.html
http://www.northernindustrialsupplycompany.com/outside/request2.html

Ventilation Systems Engineering

asap@buffalofan.com

northernindustrialsupply

northernindustrial

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northernin

northernindustrial

nisco@primus.ca

***

Axial Roof Ventilators

Axial Hooded Power Roof Ventilators are offered with optional filter rack and filter package protected by bird and insect screen. Motorized back draft dampers are standard on all supply air fans. Filtered mushroom head features channel type filter racks, bird screen, hinged connection to the stack box. Special coatings are available upon request. Fan panel is of double orifice design to allow for supply / exhaust, or reverse-flow operation. Discharge diffusers are available in variety of styles.

Power Roof Ventilators

PRV Northern Fan Power Roof Ventilators provide clear evidence of the continued leadership of Northern Fan in the area of ventilating fan packages for industrial and commercial ventilation. Northern Fan supplies axial hooded fans covering sizea ranging from 12″ to 120″ wheel diameters with capacities from 2000 CFM to 200,000 CFM, and heating capacity up to 4,500,000 BTU/hr.

Axial Exhaust Power Roof Ventilators

Northern Fan Axial Exhaust Power Roof Ventilators are factory assembled package units constructed to withstand hurricane winds. Its construction incorporates mushroom head, or hood head with bird screen, which is hinged to a box-style stack, supplied with access door. For higher capacities stack can be substituted with tubeaxial, or vaneaxial fan. Curb caps are welded to the curb side of the stack. Fan panel assembly is located near the top. Back-draft stack dampers are standard option. Disconnect safety switch is mandatory for roof mounted units.

What is an Exhaust Fan

An exhaust fan is a mechanical ventilation device that helps to draw out stale and impure air from your home and bring in fresh air, thereby improving the quality of indoor air. Exhaust fans are typically ducted to the exteriors of your house, through which bad indoor air can effectively be removed from your living space.

Exhaust fans are very effective at any building ventilation. Without proper ventilation, the air inside your home can get filled with harmful contaminants and disease causing pathogens.

Air Roof Ventilators

Northern Fan Make-Up Air Roof Ventilators are available with direct gas fired heater, or steam / hot water coil packages. Seven arrangements are available for efficient control of the air flow in various modes on operation: fresh air / return air / by-pass air, in various mounting arrangements.

FRP Construction – Fiber Reinforced Polyester corrosion resistant construction is available for all Northern Fan hooded power roof ventilators along with protective coatings for corrosive exhaust fumes, or atmosphere, including synthetic vinyl plastic and cathalytic epoxy coatings.

Corrosion resistant construction and chemical duty construction: for corrosive environment all fans are avaialble in 304 SS, 316 SS, or 316 L stainless steel construction. Spark resistant construction is available in all aluminum construction; Northern Fan wheels are made of special alloys for non-sparking airtsream construction.

Additional information can be found at the Northern Fan company web site http://www.northernindustrialsupplycompany.com/products/air_handling_units.html

Oleg Cthetchel
Canadian Ventilation HVAC Engineer
Northern Fan Co.
airknife@cogeco.ca
http://www.northernindustrialsupplycompany.com/request.html
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Industrial Power Roof Ventilator

airknife@cogeco.ca

Oleg Tchetchel

chicagoblower

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Industrial Blower Fan System for Ventilation

If relatively straightforward breeze conditioning system is possible, the rate of air velocity method outlined above should be the basic method used. However, there may be rooms or areas within the building that will require special treatment. If so, one of the other methods, such as spot cooling or zone cooling, may be combined with the basic method to achieve the over-all objectives.

Exhaust Fans

Air circulators may be effectively used to boost air velocity through large buildings that have a flow pattern difficult to control. Air circulators are also used to redirect air into occupied areas near floor level. Air circulators are also effectively used in locations where adequate exhaust and supply air fans may be lacking. Air circulation alone may provide heat relief and cooling comfort to individuals in the area. Northern Fan’s Type CABL fan is ideally suited to this application. For many installations, fans like this may be positioned 8′ to 10′ above the floor and at approximately 50′ intervals to obtain a continuously circulating column of air across a room or building. To broaden the column of air, fans should be located abreast of each other 15′ to 20′ apart. Fan locations and positions are easily adjusted to the requirements of the area.

Although an accurate, intelligent calculation of the required air volume for a breeze conditioning system has been made, there are practical limitations in most buildings that may seriously affect the final results. By giving these limitations proper consideration in the planning stage, the system can usually be modified to compensate for them. Some of the more common limitations are listed here.

Effects of Partitions on Industrial Blower Fans

It is obvious that interior partitions restrict and interrupt the flow of air through a structure. The effect of these partitions on the system must be analyzed and solutions found. In buildings with very high ceilings. the cross-sectional area factor may become unrealistic in calculating the required air volume. In most instances, inexpensive baffles can be installed across the building width to reduce the effective cross-section to an area 10′ or 12′ above floor level. Machinery, raw materials and finished goods that obstruct air circulation. These obstacles, like interior partitions, must be considered and methods worked out to overcome the problems they create to the proper circulation of air through the structure. Frequently, the location of heat-producing machinery will seriously interfere with the preferred pattern of air circulation. This situation can destroy the effectiveness of the system. An alternative plan to overcome the problem is essential.

Ceiling Heights and Industrial Fans

Another limitation of the very high ceiling or roof is the difficulty of maintaining the air velocity near floor level. The baffle method just described is usually the best way to reconcentrate the air flow along the floor level where it will be effective in providing personnel comfort. In large buildings, baffles may be required at l00-foot intervals to keep air flow near the floor level.

Industrial Fans & Blowers Layout

Operations within the area frequently require wall openings or loading doors that will drastically interfere with the desired airflow pattern. In some cases, individuals may open windows that should remain closed to maintain effective air circulation. A remedy for each of these problems is required. For maximum efficiency and economy, a good layout will avoid the restricted intake opening. The type of exhaust equipment normally utilized is most economical and efficient if static pressure in the system is 1/8″ or less. To obtain this condition, air velocity through intake openings should not exceed 1,000 feet per minute, a lower figure is usually desirable.

Additional information can be found at the Northern Fan web site http://northernindustrialsupplycompany.com/products/ventilators.html

Oleg Cthetchel
Air Process Systems Engineer
airknife@cogeco.ca
Northern Fan Co.
http://northernindustrialsupplycompany.com
http://northernindustrialsupplycompany.com/burlington/request6.html

Practical Ways of Ventilating

airknife@cogeco.ca

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canadablow

***

High Temperature Blowers

Northern Industrial Co. offers new temperature blowers and fans for various industrial applications to 2200 F. This was achived by using extremely high strength stainless steel alloys for the fans impellers, that allow for higher safe speeds at elevated temperatures.

The Northern Industrial high temperature oven fans line now include:

Operating up to 2200 F, centrifugal, axial and plug fan types;
Pre-engineered and custom made fans for all types of applications with variety of impeller types and accessories;
Canada Blower engineers provide a professional advice and recommend a right fan for every application & oven / plenum design;
The fan offering provides competitive replacement fans to Garden City, Lau, IGE, Alloy Fabricating fan models; repairs, re-build & balancing;
Unique high temperature water-cooled motors for operation up to 2300 F.

High Temperature Blowers & Fans

Fans with ambient air cooling systems handling hot airstreams must have sufficient airflow and be kept in operation until airstream temperatures cool below 120 F to prevent damage to the fan unit. The Tubeaxial fan ambient air cooling system is only effective while fan is operating.

There are two major types of high temperature fans – centrifugal and axial:

Centrifugal Wheels:

Multiblade forward curve wheel. This type of wheel is usually specified where there is a necessity for large volumes of flow against low to medium static pressure requirements. The forward curve blade is that it delivers the same volume of air as either the backward or radial blade wheel, at a lower fan speed, which is important due to wheel stresses at elevated temperatures. This fan is the most common type used in all types of heat treatment operations except where a buildup of material on the blades could occur, as wheel unbalance would result.
Radial Blade, paddle wheel type fans. This type of wheel is usually specified where there is a necessity for medium volumes of flow against medium to large static pressures. The paddle wheel is considered a self cleaning type of wheel. It could be used where there are various materials or dust in the air stream. Due to its structurally strong design, it is used in many heat treatment applications at very high temperatures where maximum fan longevity is desired.

Axial Blade Wheels:

The axial blade wheel is usually specified where there is a need for very large volumes of flows against low static pressure. Axial wheel like the multi-blade forward curve type wheel could cause an axial fan to deliver different air volumes at the same static pressure, if the total pressure requirement of the fan system was underestimated. This type of fan is ideally suited where a large volume of flow is required with a minimum of duct work and is used extensively for small and large furnaces, such as aluminum annealing.

Fans handling hot airstreams must have sufficient airflow and be kept in operation until airstream temperatures cool below 120 F to prevent damage to the fan unit. The Tubeaxial fan ambient air cooling system is only effective while fan is operating.

For additional information please refer to http://northernindustrialsupplycompany.com/index.html.

Oleg Cthetchel
Canadian Process Design Engineer
Northern Industrial Co.
http://northernindustrialsupplycompany.com/products/industrialfan_blowers.html
http://northernindustrialsupplycompany.com/manufacturers.html

Engineering of high temperature fans and blowers for operating up to 2,200 F.

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fan@cogeco.ca

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Industrial Blower Fan Ventilation

Aeration involves moving air through either a solid or fluid medium bed and is used for various purposes. Depending on specific material being aerated, our fans are utilized for moisture control in applications such as grain bin storage, and also provide oxygen and control moisture/temperature in composting applications. Due to varying environmental conditions, fans used in aeration systems often require special construction such as fiberglass, alloys and specialty coatings.

Industrial Fans for Ventilation

The treatment of wastewater can result in a variety of unwanted and hazardous gases, such as H2S and SO2. As the application specialists, Northern Fan has the expertise needed to supply the proper air moving equipment that is specifically designed for resisting the corrosive nature of these compounds. In other pollution control systems, our fans are installed on the clean side, which offer a higher efficiency design for moving gases into a scrubber or other device. One of the major challenges in wastewater and sewage treatment plants is controlling the odors that are emitted. These plants are often located in residential areas and forced to adhere to strict codes and regulations. These odors are caused by gases such as hydrogen sulfide and ammonia. To reduce odor emissions a variety of systems have been found effective, such as thermal oxidation, chemical scrubbers and biofilters. The fan requirements in these processes are similar in that they require special alloys, coatings or fiberglass construction.

Proper Industrial Blowers & Fans

Through decomposition, landfills produce syngas, a combination of methane carbon monoxide, and other hazardous gases. To avoid dangerously high levels of these gases, forced draft fans are used to drive fresh air into the landfill mass. Induced draft fans are also used for pulling noxious gases out of the landfill for safe disposal or for collecting them as a fuel source. The fans used in these applications often require special materials or coatings along with spark resistant construction. Depending on your specific needs, Northern Industrial Supply Company Fans & Blowers will work with you to select the proper air moving equipment.

High Volume Industrial Blowers and Fans

High volume, low concentration or non-condensable gases refers to gases that are in concentrations below their explosion limit. These gases are drawn through an induced draft fan and then processed with a RTO (regenerative thermal oxidizer) or incinerator that ultimately burns the gases for safe disposal. HVLC gases are often corrosive and at elevated temperatures, that is why we provide a number of fans that are corrosion resistant. In addition, we offer leak-tight construction to avoid emitting these toxic, flammable gases into the environment. In the case that these gases are above their explosion limit, Buffalo Blower supplies a full line of non-sparking fans that allow for the safe movement of hazardous gases. Based on your specific requirements, our fans can be constructed with aluminum and monel materials.

Large Industrial Ventilation Fans

In a manufacturing environment, vacuum systems are used to move and transport waste material. Sawdust, metal shavings, and other waste is easily transported away from work areas to a specified collection point for simplified clean up and removal. Vacuum systems are also used to provide suction for the manipulation of components, various materials and forming processes. These systems usually consist of long runs of relatively small diameter pipe or ducting. This results in the need for high pressure low flow fans.

Boiler Application Industrial Blower Fans

Boilers are used in a variety of industries for producing heat and energy. Many boiler applications will burn fuel readily available on site, such a byproduct from the given process. An example of this is Bagasse, which is a fibrous matter that remains after sugarcane is processed to extract their juices. The bagasse is a biofuel used for many boiler applications. Fans in boiler applications are forced draft, induced draft, over fire air and combustion air.

Large Industrial Fan Characteristics

At this juncture it is prudent to reiterate that a fan running at a particular speed can have an infinite number of operating points all along its characteristic curve. The fan will interact with the system to produce an operating point at the intersection of the system curve and the fan curve. Note that it is the system in which the fan is installed that will determine the operating point on the fan curve. Thus it is vitally important that the system designer accurately determine the system losses in order to ensure that the actual air flow rate is as close as possible to the design air flow rate.

For additional information please refer to http://www.northernindustrialsupplycompany.com/outside/request4.html

Oleg Chetchel
Industrial Process Equipment Engineer
airknife@cogeco.ca
Northern Fan Co.
http://www.northernindustrialsupplycompany.com/outside/request5.html
http://www.northernindustrialsupplycompany.com/outside/request3.html

Industrial Processes Ventilating

airknife@cogeco.ca

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Industrial Blowers and Fans Ventilators and Industrial Ventilation

Energy recovery applications typically use two fans that provide air through a heat exchanger that “treats” the air by heating or cooling it before it enters the building. Canada Blower ’s plenum and forward curved fans are typically used for energy recovery applications and offer a wide range of performance and flexibility. Generator rooms require a wide range of fans to optimize the performance of generators and other equipment. Exhaust fans are used to prevent heat buildup within the generator room, while supply fans are used to provide fresh air for combustion and efficient generator performance. Room size, space limitations, and mounting capabilities will determine the exact type of fan needed for each specific application. As a leading manufacturer of air moving equipment, Canada Blower offers numerous fan types for meeting any generator room specification.

Industrial Pressure Blowers

Elevator shafts require proper air moving equipment to provide smoke control in the event of a fire. Pressurization is used to prevent smoke from migrating through elevator shafts to other floors, similar to how fans are used to control smoke in stairwells. Today’s elevator pressurization systems are designed to allow elevators to be used by firefighting teams. However, some systems are designed for the evacuation of handicapped individuals. While small amounts of smoke in an elevator may be tolerated by firefighters, smoke in an elevator and its entry and exit paths is unacceptable. Canada Blower ’s complete offering of smoke and heat exhaust fans are relied upon for elevator shaft exhaust/pressurization in emergency situations. Jet bridges are hallways used by passengers to board commercial airplanes. While these bridges are portable and movable, their continuous use requires an exhaust fan or gravity ventilator to prevent air from becoming stagnant. Fans and ventilators draw air into the bridge from the terminal and through the exit which is then exhausted through a fan or ventilator. Canada Blower provides a number of centrifugal roof exhausters and gravity relief ventilators for jet bridge exhaust applications.

Industrial Blowers for Ventilation

Enclosed or underground parking garages require ventilation to remove harmful vehicle emissions and other pollutants, while providing fresh air. Ventilation is also a requirement in the event of a fire to remove smoke and to provide a clear access for firefighters. Exhaust and supply fans are used in conjunction with ductwork to distribute air throughout the parking garage, providing a common system for both pollution and smoke control. Twin City Fan manufactures a complete line of axial flow fans designed for parking garage ventilation systems. Restroom exhaust fans are primarily used to reduce moisture and prevent mold buildup. As restrooms typically occupy a small space, restroom exhaust fans are considered low volume and generally provide 2 to 5 air exchanges per minute. These fans are mounted on the roof or in-line with the system’s ductwork. Canada Blower offers a full line of centrifugal roof & wall exhausters, inline centrifugal fans, and ceiling & cabinet ventilators to accommodate all restroom requirements and exhaust applications.

Industrial Inline Exhaust Fans

Rooftop exhaust fans are designed to remove heat and odors from buildings to improve air quality and occupant comfort. Areas such as cafeterias, locker rooms, office spaces, restrooms and warehouses often have unique requirements specified by local codes and utilize a wide range of rooftop exhaust fans. To accommodate these various types of environments and ventilation systems, Canada Blower Fan offers a complete line of products to support every rooftop exhaust application. These applications can range from clean airstreams with minimal filtration all way to high density offices and health care facilities that must comply with extremely stringent regulations. Gravity ventilators are used to equalize a building’s positive or negative pressure created by other fans in the system. These ventilators provide natural ventilation and are used for intake and relief applications. Canada Blower Fan offers both spun aluminum and hooded ventilators, featuring a low silhouette for low roof-lines. Louvered penthouse ventilators are available when aesthetics are not an important factor and feature extruded aluminum louvers. Sidewall exhaust and supply applications require panel fans to move large volumes of air at low static pressures. Panel fans are commonly used on the walls of warehouses and manufacturing facilities to supply outside air or to remove hot or noxious gases in exhaust configurations. Other typical applications include removing carbon dioxide from produce storage facilities, greenhouse ventilation, and parking garages. Panel fans can be mounted directly to the wall panel, which is especially useful when ductwork is unnecessary. Each fan can be customized to the individual needs of the customer, including aluminum or stainless steel construction, explosion proof motors, gravity or motorized dampers, corrosion resistant coatings, and fully reversible propellers.

Industrial Fans

Indoor swimming pools require air moving equipment for exhausting moisture-laden, corrosive and chlorinated air. Fans and duct systems must be designed to withstand these elements. That is why Canada Blower offers a wide selection of fans and construction materials, including fiberglass, alloys, and specialty coatings to prevent the potential corrosion associated with these environments.

Industrial Ventilator Blowers & Fans

Ventilation is a crucial component for any mining operation. Inadequate ventilation can expose miners to high levels of dangerous gases, dust particulates, and excessive heat. The consequences of prolonged exposure to these elements can pose a series of health related complications. We understand the significance of selecting the right ventilation equipment for maximizing the air quality in mines, which is why Buffalo Blower offers a comprehensive line of products suited for the most rigorous mining ventilation applications. We also offer many special design features such as non sparking units, explosion proof motors and specialty guards. Stairwells are frequently the primary escape route in the event of a fire emergency and may also serve as the primary access route for firefighting teams. In these smoke control zones, fans are used to pressurize stairwells to limit smoke infiltration by maintaining positive pressure across closed stairwell doors. Fans used for stairwell pressurization are designed to operate at low enough pressures so that doors can be safely opened during evacuation. Because occupant safety is the most important aspect when facing a fire emergency, Buffalo Blower offers a complete line of smoke and heat exhaust fans designed for stairwell pressurization.

Industrial Pressure Blower Fans

Service stations require vehicle exhaust systems to maintain indoor air quality for customers and employees. These systems attach to a vehicle’s exhaust pipe to draw hazardous emissions out of the building. The fans used in these systems are attached to small hose and must be capable of producing high pressures due to the air velocity required to exhaust the fumes. Buffalo Blower offers a wide selection of compact pressure blowers and radial bladed fans capable of meeting the high pressures requirements of vehicle exhaust systems.

For additional information please refer to http://www.canadablower.com/index.html

Susan Terlitski
Building Ventilation Specialist
Canada Blower Co.
canadablower@canadablower.com
http://www.canadablower.com/fans/index.html
http://www.canadablower.com/inquiry/index.html

Commercial Building Ventilating

canadablower@canadablower.com

ventilation,ventilating,industrial,building,warehouse,fan,ventilator,blower,roof,wall,exhaust,supply

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buffaloblower

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Axial Ventilator Fan vs Axial Blower Fan

A variable pitch blade in axial fan blower is used where precise control of static pressure within supply ducts is required. The fan wheel will spin at a constant RPM . The blades follow the control pitch hub. As the hub moves toward the rotor the blades increase their angle of attack and an increase in flow results.

Axial Ventilators

Axial flow ventilators have blades that force air to move along the shaft about which the blades rotate. Axial fans blow air across the axis of the fan, linearly, hence their name. This type of fan is used in a wide variety of applications, ranging from small cooling fans for electronics to the giant fans used in wind tunnels.

Some examples of axial fans are:

Table fan – Basic elements of a typical table fan include the fan blade, base, armature and lead wires, motor, blade guard, motor housing, oscillator gearbox, and oscillator shaft. The oscillator is a mechanism that motions the fan from side to side. The axle comes out on both ends of the motor, one end of the axle is attached to the blade and the other is attached to the oscillator gearbox. The motor case joins to the gearbox to contain the rotor and stator. The oscillator shaft combines to the weighted base and the gearbox. A motor housing covers the oscillator mechanism. The blade guard joins to the motor case for safety.

Electro-mechanical fans – among collectors, are rated according to their condition, size, age, and number of blades. Four-blade designs are the most common. Five-blade or six-blade designs are rare. The materials from which the components are made, such as brass, are important factors in fan desirability.

Ceiling fan with light. Ceiling fan – A fan suspended from the ceiling of a room is a ceiling fan.

In automobiles, a mechanical fan provides engine cooling and prevents the engine from overheating by blowing or sucking air through a coolant-filled radiator. It can be driven with a belt and pulley off the engine’s crankshaft or an electric fan switched on/off by a thermostatic switch.

Centrifugal Fans

In centrifugal fan, as opposed to axial flow fan, the air is moving perpendicularly to the fan shaft. Often called a “squirrel cage” (due to its similarity in appearance to exercise wheels for pet rodents), the centrifugal fan has a moving component (called an impeller) that consists of a central shaft about which a set of blades, or ribs, are positioned. Centrifugal fans blow air at right angles to the intake of the fan, and spin the air outwards to the outlet (by deflection and centrifugal force). The impeller rotates, causing air to enter the fan near the shaft and move perpendicularly from the shaft to the opening in the scroll-shaped fan casing. A centrifugal fan produces more pressure for a given air volume, and is used where this is desirable such as in leaf blowers, hair driers, air mattress inflators, inflatable structures, and various industrial purposes. They are typically noisier than comparable axial fans.

A mixed flow fan – is an air moving device in between axial flow fan and centrifugal fan. Mixed Flow fans are an excellent choice for return air, supply, or general ventilation applications where low sound is critical. As compared to similarly sized tubular centrifugals and vane axials, a mixed flow fan will be 5-20 dB quieter! In addition, the mixed flow wheel is extremely efficient and will cut down on operating expenses.

Additional information can be found at the Northern Industrial web site http://northernindustrialsupplycompany.com/products/ilg.html

Oleg Cthetchel
Canadian Industrial Ventilating Engineer
Northern Industrial Co.
http://northernindustrialsupplycompany.com/manufacturers.html
http://northernindustrialsupplycompany.com

Axial vs. Centrifugal Fan

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Industrial Blowers in Ventilation

In case of temperatures above 220 degrees and metal and if pressure is above 10 wg (water gage), typical recommendations in the construction of industrial blowers are generally fiber glass.

Industrial Blowers in the Environment

By the size of the environment in which it is to be operated the size of the blower may be regulated. For example, to house both the fan and its power supply, some units are big enough. Mainly used for cleanups and in spaces that require temporary circulation or air transfer, there are smaller and portable blowers.

To circulate the movement of air and gas in ventilation applications, industrial blowers are mainly used. To replace impure or contaminated air with fresh air by swirling it around is their main function. Medical, agricultural, chemical, oil and gas, mining and construction, automotive, food processing, almost every industry uses blowers for different purposes such as drying, reducing the levels of heat, reducing smoke and odors, processing and controlling gaseous fumes.

For industrial area, air conditioning can often become too large of an expense but now with technological advancements, these days industrial fans are being that bring some much needed relief. Industrial electric fans manufacturers are coming up with fans that are quite helpful and advantageous for places where dampness, heat stratification, and stagnant air are common and recurring problems. Also, these fans can be used for high static pressure. These units replace air as well by blowing out the old and stagnant air for a wide area that otherwise would collect this air without replenishing it in entirety which is also referred to as an industrial electric blower.

Industrial Blowers for Ventilation

In the removal of pollutants like carbon monoxide, dust and metal particles, sulphur dioxide, nitrous oxides, sulphuric acid, and hydrocarbon solvents, the industrial fans are very helpful. In comparison to an air conditioner, industrial electric fans do not use as much electricity. They also circulate air and cool it at a fast rate for a large space. The larger motor of an industrial fan is actually guaranteed to save energy costs on any industrial ventilation solution with high-powered, energy-efficient motors.

Able to generate a substantial volume of air with minimal vibration in a limited space, like the ones used in air conditioning, heating, ventilation and vacuum cleaners, a centrifugal blower is a common device. Through its center, a centrifugal blower intake air and directs it through a perpendicular opening in the housing. Thus blowers are necessary in various industrial places.

Additional information can be found at the Industrial Fan Blower company web site http://industrialfanblower.net

Oleg Tchechel
Developer of Industrial Air Make-Up Units
Industrial Fan Blower Co.
asap@buffalofan.com
http://www.industrialfanblower.net/cbd_about_us.htm
http://www.industrialfanblower.net/cbd_links.htm

Blowers In Industrial Ventilation

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