Industrial Pressure Blower

Regenerative Channel Blowers

Regenerative Blowers deliver up to 1,300 SCFM of uncontaminated flow at up to 8 PSIG pressure, and from 30” to 0” Hg vacuum. Typical applications include air conveying, refuse burning, instrument air, air dryer, air cushioning, tank agitation, sewage aeration, blister packing, liquid spraying, fuel atomizing, air knives, product curing, radon gas elimination, automatic bottling, vacuum holding, soil remediation, paper transport, scrap collection, powder recovery, gas sampling, thread holding, and all applications requiring medium pressure, or vacuum.

Side Channel Blowers

Side Channel Blowers are available with cast aluminum casing enclosing cast aluminum rotors. NPT threaded flange connection 1”, 1.5”, 2”, 2.5”, 3” and 4”, as well as metric threaded flange of type G are standard. Shaft sealing is provided by C-flange motor mount, or by sealed bearings.

Channel Blower Packages

Channel Blower Packages are supplied on unitary base of standard or isolation type with RIS, or spring vibration isolators. Power transmission is implemented by V-Belt Drives complete with V-belts, adjustable or constant speed sheaves and pulleys, bushings, and motor slide bases; or by direct drive coupling. Motors are of High Efficiency design. OSHA Belt Guard and OSHA Coupling Guard are standard.

Expansion Joints, Flexible Connectors and Compression Couplings isolate Regenerative Blower to allow for thermal expansion and mis-alignment of piping.

Pressure / Vacuum Relief Safety Valves of VLR type are of spring loaded type kunkle valve. They set-up point of operation and bleed-off to prevent over-pressurization, or relief vacuum.

Inline Check Valves direct airflow or vacuum in one direction only. Flow Converters change direction of the flow by electronically, or pneumatically activated diverter.

Pressure / Vacuum Controls include differential pressure gauge up to 15 PSIG, vacuum gauge from 30” to 0” Hg, temperature gauge, gauge snubber to reduce pressure pulsation, and .25” pet-cock valve to isolate the gauge.

Regenerative Silencers are offered as inlet and discharge silencers with sound absorbing polyurethane elements. Additional auxiliary inlet and outlet silencers offer additional means of sound attenuation. Sound Enclosures are custom made based on application requirements.

Inlet Filters are offered with wire-mesh oil wetted (multi-wash), high efficiency ultra-synthetic (polyester, washable), or paper (thrown away) media. Controls included Differential Filter Pressure Gauge used as Filter Restriction Indicator. Filter casing is available as open flange design, hooded design, or combined filter-silencer assembly. In-line filters are custom.

Controls and drives options for side channel blowers include: variable frequency drives (VFD), motor starters, are available in NEMA 1, NEMA 3R, NEMA 4 enclosure, as well as for x-proof applications.

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

Susan Terlitski
Ventilation Equipment Designer
canadablower@canadablower.com
Canada Blower
http://www.canadablower.com/index.html
http://www.canadablower.com/oem/index.html

Channel Type Blower

canadablower@canadablower.com

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Industrial Blowers – Multistage

Uses of HPB High Pressure Radial Fans include various manufacturing industries: pulp and Paper, chemical, metals processing, gases production and many others.

High Pressure Blowers & Fans

NIS-CO Fan Pressure Air Fans are at work in as many diverse applications as they are in locations throughout the world. Clean air applications include combustion air, air drying primary air ejectors, and product cooling. This fan can handle pneumatic conveying systems. The HPB fan is ideal for corrosive exhaust, air pollution systems and chemical processing. By adding ceramic tile or chromium carbide wheel and housing liners, Buffalo’s PA fans easily handle abrasive materials. In particular, fans with ceramic tile liners are extremely effective in pulverized coal applications, handling up to 250 grains per cubic feet of air. For corrosive gases, a stainless steel wheel and housing is available, or a lower cost rubber-lined, mild steel housing will often fulfill the requirements.

Multistage Blowers

Multistage Blowers deliver up to 150,000 SCFM of uncontaminated gas flow at up to 30 PSIG pressure, and from 20” to 0” Hg vacuum. Typical applications include air conveying, industrial & municipal water waste, water aeration, petroleum and chemical refineries, flotation, central vacuum systems, cell aeration, sulfur recovery, fluidized bed units, gas boosters for carbon dioxide, nitrogen, propane, natural gas, steam compressors for vapor recompression systems, electroplating, agitation of tanks, cement pneumatic conveying, landfill gas recovery, leaching process, soil remediation, paper transport, scrap collection, powder recovery, and all applications requiring medium pressure, or vacuum at relatively large volume of flow.

Industrial Centrifugal Pressure Blowers

Centrifugal Pressure Blowers are available with cast iron, or fabricated steel casing enclosing cast aluminum, fabricated aluminum, or stainless steel rotors. ANSI 125/150 flange connections, as well as metric standard flange connections are standard. Shaft sealing is provided by labyrinth seal, mechanical seal, purgeable nitrogen, or other gas seal, gas tight seal, or by sealed bearing compartments.

NIS-CO Multistage Blower Packages are supplied on unitary base of standard or isolation type with RIS, or spring vibration isolators. Power transmission is implemented by V-Belt Drives complete with V-belts, adjustable or constant speed sheaves and pulleys, bushings, and motor slide bases; or by direct drive coupling. Motors are of High Efficiency design. OSHA Belt Guard and OSHA Coupling Guard are standard.

Expansion Joints, Flexible Connectors and Compression Couplings isolate Multistage Blower to allow for thermal expansion and mis-alignment of piping.

Pressure / Vacuum Relief Safety Valves are of spring loaded type type, or weight type. They set-up point of operation and bleed-off to prevent over-pressurization, or relief vacuum.

Inline Check Valves direct airflow or vacuum in one direction only.

Blower Silencers are offered as inlet and discharge silencers with sound absorbing elements. Sound Enclosures are custom made based on application requirements.

Controls and drives for Multi-satge blowers include: variable frequency drives (VFD), motor starters, are available in NEMA 1, NEMA 3R, NEMA 4 enclosure, as well as for x-proof applications.

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

Oleg Cthetchel
Canadian Process Design Engineer
nis@primus.ca
NIS-CO Co.
http://northernindustrialsupplycompany.com/products/industrialfan_blowers.html
http://northernindustrialsupplycompany.com/manufacturers.html

Centrifugal High Pressure Fans

nis@primus.ca

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HVAC with Industrial Blowers and Fans

Heating, Ventilation and Air Conditioning (HVAC) is a system that provides warm air or cool air depending on your climate needs. HVAC systems are esteemed for their energy-saving abilities. They are installed by certified HVAC trained technicians only. Because of its awesome benefits, along with its pollution control feature, more homes are being installed with HVAC Indianapolis systems each year.

Another benefit of having an HVAC system installed at your home is its ability to clean and improve the air’s quality. Studies show that the quality of indoor air is way worse than outdoor air because indoor air is congested. The polluted indoor air, in turn, worsens allergies and causes colds to stay longer. With an HVAC system, the air indoors will constantly be exchanged with filtered fresh outdoor air.

It is true that the initial cost of an HVAC system is quite high. In fact, it is higher than the typical gas furnace. However, in the long run, each month you will feel the difference through your energy costs. Also, with HVAC systems, you won’t have to buy separate systems for heating and cooling and since there is only one machine, home space will also be saved for other important things. In addition, some HVAC systems run on renewable energy via solar panels. Plus, a non-chlorine-based coolant is used. You are actually saving the Earth too!

One major problem of most homeowners is moisture retention. Whether your local climate changes every few months or stays constant, moisture stays in your home. Indoors, air does not circulate properly without decent ventilation. Because of this, outside air cannot be able to circulate with the indoor air. When this happens, molds are more likely to grow inside walls, under floors, and even on your clothes. To avoid this, you need to dehumidify your home. An HVAC Indianapolis homes use can help you circulate indoor and outdoor air for less moisture in your home.

Moreover, HVAC systems increase a property’s value. In the case that you decide to sell your home in the future, your HVAC system will aid in appraising your home’s value. Compared to having an old-fashioned gas furnace which can be a potential fire hazard, an HVAC system is more convenient, appealing, and, not to mention, safe. Surely, most potential buyers will choose HVAC systems over old gas furnaces.

Consult your local heating and cooling Indianapolis based company about the things you need to prepare and are concerned about when planning to buy an HVAC system.

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

Susanna Terlitskaia
Industrial Ventilating Engineer
Industrial Blower Fans Company
nis@primus.ca
http://www.industrialblowerfan.com/scrubbers-dust-collectors.html
http://www.industrialblowerfan.com/roof-extractors.html

HVAC System

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nis@primus.ca

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Industrial Blowers – FRP

Industrial FRP Blowers are designed for highly corrosive application to handle acid vapors, and organic and inorganic chemical fumes that are highly corrosive to metal at temperatures up to 250 F. Applications include scrubber systems, odor control systems in wastewater treatment plants, laboratory exhaust systems, metal finishing and chemical-process industries. Fiber-reinforced-plastic pressure blowers are made from chemical grade polyester or vinyl ester resins and reinforced with glass or fiber. Additional surface veil is available depending on the application. Capacity range of FRP Pressure Blowers is from 0 to 8,000 CFM and static pressure range is up to 40” WG.

Industrial Pressure Blowers

Housings of FRP Pressure Blowers are rotatable and fabricated of polyester resin based FRP , while wheels are made of vinyl ester resin FRP to allow for more strength. 316 stainless steel, or Hastelloy C276 alloy wheel and shaft assemblies are available. FRP ORB self-cleaning wheel design and FRP Pressure Blower wheel design are used depending on application. Standard shafts are made of C-1040/1045 steel covered with FRP sleeve. 316 stainless steel shafts are optional. Inlet/outlet flange drilling is according to ANSI 125/150 bolt pattern, or Voluntary Product Standard PS15-69. Neoprene gasketing with Teflon Shaft Seal, or Viton seal element in FRP casing is provided where low leakage is desired.

FRP Pressure Blower Accessories

FRP Pressure Blower Accessories include outlet flanged wafer-type damper, made of FRP; inlet vane damper in FRP construction; companion flange with collar in FRP construction; unitary base available with spring or rubber-in-shear RIS isolators ; drain and plug threaded FRP drain with PVC plug; inspection port ; surface veil provided in compliance with ASTM D 4167; all-vinyl ester airstream ; graphite impregnation to control static electricity; adjustable motor bases ; OSHA Guards and Motor weather cover; drive components ; VFD duty high efficiency motors ; and others.

Teflon Impregnated Flexible Connectors to isolate FRP pressure blower and to allow for mis-alignment of piping.

FRP Blower Silencers are offered as inlet and discharge silencers with FRP sound absorbing elements. 304, 316 stainless steel options are available as well.

Controls and drives: variable frequency drives (VFD), magnetic motor starters, are available in NEMA 1, NEMA 3R, NEMA 4 enclosure, as well as complete set of electrical components for x-proof applications.

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

Oleg Cthetchel
Industrial Air Make-Up Equipment Designer
nis@primus.ca
Northern Fan Co.
http://www.northernindustrialsupplycompany.com/burlington/request2.html
http://www.northernindustrialsupplycompany.com/burlington/request3.html

Industrial Fiberglass Blower and Fan

nis@primus.ca

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Roof Ventilation Systems

There are excellent roof ventilation systems in the modern architectural technology that air the buildings in most effective manner. Ever changing construction techniques and practices offer unique solutions to roof space ventilation that are innovative and yet highly practical.

For efficiency of these kind of roof systems the volume of air intake must be equal to or more than air exhaust. With a ridge vent system, intake vents must be placed low on the roof, usually in the eaves. Years of research have proven that Air Vent ridge vents, combined with under-eave venting, are the most efficient and effective system you can install. A good R-V system is the most significant contributory factor adding to the longevity of the roof. A roof with effective ventilation-system, along with proper maintenance will live approximately 25% more than any other roof.

Effective industrial and commercial ventilation

Effective industrial and commercial ventilation is in constant need of a supply of fresh air flowing around the workplace, exchanging musty and toxic air for clean healthy air. It is the basis of a healthy work environment for the work force. It also safeguards the tools and machinery from damage or components and products from getting spoiled.

Just as there is no uniformity of buildings and structures, there really is no such thing as an “off the shelf” solution for R-V systems. Manufacturers these days are offering bespoke air ventilating systems to suit exact requirements of the clients

Single storied houses can have gable vents. These are window-like, immovable louvered frames in the outside walls of houses. They run along the siding just below the roof peak and allow airflow from the house’s attic space to the outside. But the most popular these days is the ridge ventilation system. These are universal, invisible, none load-bearing, unexposed and stormproof.

Roof ventilation system

A proper kind of system for a roof is often the single most important factor which governs its longevity. A roof having a good ventilating system, along with proper maintenance will live approximately 25% more than any other roof.A good roof ventilation system ensures that there is balance between the air coming in and the air going out. The cross ventilation of air around the roof keeps the roof temperature bearable and also keeps the material used in the construction of the roof from reaching very high temperatures.

This roof airing system finds extensive application in chemical industry, light industry, food industry, medicine, textile and dye, warehouse, metallurgy, electrical power, leather industry, construction, tunnel, machine, market, etc.

NIS-CO is one of the leading manufacturers of pre-engineered roof ventilation systems in North America. The roof ventilation system of the company is designed according to the international quality standards. The professional standards set by the organization with regard to product and service quality has garnered tremendous response from clients across industry verticals.

For more information about proper building ventilation please visit the ABB Blower company web site http://fanblower.com/high_pressure_blower_fan.htm

Susann Terlitski
Designer of Industrial Air Handling Units
Fan and Blower Co.
abbblower@abbblower.com
http://www.fanblower.com/direct_driven_belt_driven_axial_fans.htm
http://www.fanblower.com/double_inlet_double_width.htm

Roof Ventilation

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How to Improve Air Flow Ventilation

Improvement the air circulation in the building makes a huge difference because the faster the air moves through your home, the easier it is to maintain a temperature within your home. The heating, air conditioning, plumbing, and electrical service shops can help you to choose the different methods which will make this possible. The good news is that most of these methods will allow you to not only have more consistent temperatures throughout your home. They will also help you to be able to spend less money to get the results you are looking for.

There are three methods you can try for improving the circulation in your home. One of the ways is to make sure that you are getting the right amount of air flow through the ventilation system in your home. You can also make sure that you are regularly changing the air filters. You can also make sure to use electric zoning so that you will be able to get constant temperatures throughout your home. The more you are willing to invest in the different methods for circulating the air throughout your home, the more comfortable your home will be.

Improving Air Flow in the Ventilation System

There are many different ways in which you can improve the amount of circulation that you get. One way is to install duct fans. These are blowers which will help to force the air through the ventilation system and into the different rooms of the home. These are especially useful when you notice that certain rooms of the home are harder to ventilate or affect the temperature than others. They work remotely, but in conjunction with the HVAC unit so that they will only operate while the system is on.

Change Your Air Filters

Improving indoor air quality is possible by making sure to change the air filters regularly. Not only does changing the air filters help to improve health by improving indoor air quality. It also helps to make sure that the air is able to flow easily throughout the house. This will help to make sure that you are getting the right kind of ventilation so that the entire home will be as comfortable as possible. Try to invest in air filters which will filter out different kinds of allergens.

Maximizing Temperatures through Electronic Zoning

When you have better ventilation, you might also want to invest in electronic zoning. This is when you use different thermostats throughout the home to control the temperature in different zones. The greater control will allow you to be able to make sure that the right amount of hot or cold air is getting to where it needs to be. You will no longer have to rely on one thermostat to control the temperature for the entire home. This will improve circulation greatly.

Additional information can be found at the Industrial High Pressure Blower Company web site http://www.highpressureblower.net/pressureblower.html

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

Methods of Improving Ventilation

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alex.todorov@canadablower.com

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Industrial Exhaust Fans

NIS-CO offer smoke and heat exhaust fans that are UL listed for Smoke Control Systems and a full line of kitchen fans that are UL 762 listed for the exhaust of grease-laden air. Buffalo Blower engineers design, test, and manufacture fans for all types of buildings, including condos, custom homes, offices, malls, airports, arenas, and stadiums. We are able to meet your most precise requirements for a variety of HVAC equipment, including all types of custom, package air handlers and roof top units. In addition, NIS-CO can provide exhaust for restrooms, elevator shafts, parking garages, and jet bridges; stairwell pressurization; rooftop and sidewall supply and exhaust, including smoke and heat exhaust fans that are UL listed for Smoke Control Systems, as well as kitchen fans that are UL 762 listed for the exhaust of grease-laden air.

Large Industrial Fans

NIS-CO supplies thousands of fans to universities, hospitals, laboratories and research facilities, military bases, hotels, convention centers, and cruise ships around the world; working closely with architects, engineers and contractors to design and test fans that can meet the most precise quality and reliability requirements. NIS-CO amkes smoke and heat exhaust fans that are UL listed for Smoke Control Systems, kitchen fans that are UL 762 listed for the exhaust of grease-laden air, and a full line of laboratory and fume exhaust systems. NIS-CO provides fans for numerous residential building applications, such as stairwell and elevator shaft pressurization; kitchen, restroom, and pool exhaust; and every aspect of HVAC, including air handlers, gravity ventilators, and large rooftop units.

Exhaust Fans & Supply Fans

Manufacturing facilities require a large amount of ventilation to maintain a healthy work environment for the people working within the buildings. NIS-CO designs and builds fans to control and handle the exhaust, supply, and make-up air requirements for all types of manufacturing environments and spaces. The exhaust of welding and other noxious fumes and dusts, as well as the exhaust of hot air produced from ovens and other high temperature processes, are essential to providing safe and comfortable working conditions. In many cases, the building heating, cooling, and air conditioning (HVAC) requirements are also critical for proper production control and working conditions. A wide variety of businesses, industries, medical facilities, and institutions require ultra clean environments for research and development as well as production of specialty products and equipment. These facilities demand high filtration and positive pressures inside the clean room space to control the process and limit potential contamination. Other requirements typically include variable air volume, high efficient air moving equipment, low noise, and ultra-low vibration levels from the mechanical equipment.

Buffalo Fans & Ventilators

Among many other changes, the green revolution has created a greater need for more energy efficient fans and ventilation equipment. As a leader in the fan industry, NIS-CO engineers and manufactures high efficient products for a wide variety of green friendly applications including LEED building designs, biofuel and biomass production plants, landfills, solar film manufacturing facilities, as well as numerous waste energy and heat recovery systems. Regardless of how unique or specialized your process is, Buffalo Blower can customize our products to meet virtually any requirement.

Large Industrial Blowers & Fans

NIS-CO is well known for leveraging its design and manufacturing capabilities when constructing the heavy duty fans required for marine applications. Such marine duty fans are used for many purposes including boiler combustion air, mechanical ventilation, off shore rig diesel generator exhaust disbursement, pressurization, engine cooling, and dust control. Our air moving equipment can be found on drilling rigs, production platforms, tug boats, cruise ships, ferries, and cargo ships. We offer a number of features to meet the specific needs of the marine industry. These include shortened axial fan housings for operating in tight spaces, cast aluminum impellers and hot dip galvanized steel components for extended durability, spark resistant construction for potentially explosive air streams, water tight electrical connections to withstand corrosive environments, and IEEE 45 marine duty motors for both above deck and below deck installations.

Industrial Blower Supplier

In addition to our extensive fan design and manufacturing experience, NIS-CO offer a number of products meeting requirements of the marine industry’s governing and standard organizations including:

• Air Movement and Control Association (AMCA) – Spark Resistant Construction
• American Bureau of Shipping (ABS) – Type Approval for Ventilation and Non-Sparking services
• Appareils destinés à être utilisés en ATmosphères Explosives (ATEX) – Equipment Directive 94/9/EC

Additional information can be found at the NIS-CO company web site http://www.canadablower.com/fans/index.html

Susan Terlitski
Canadian Ventilating Engineer
canadablower@canadablower.com
NIS-CO
http://www.canadablower.com/blowers/index.html
http://www.canadablower.com/inquiry/index.html

Commercial Ventilators Fans

canadablower@canadablower.com

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buffaloblowercom

buffaloblo

Positive Pressure Ventilation with Industrial Blower Fans

Positive pressure ventilation ensures blowing things like debris and particles that would be harmful if humans breathed into their lungs out of the area where the humans are. Positive pressure ventilation also refers to medical procedures and devices that actually breathe for people who have experienced trauma and need to be on a ventilator system. For the purpose of this article we will be speaking of positive pressure ventilation in the capacity to remove unwanted contaminants from the air in a structure so that the remaining air is left breathable by all concerned.

Large Industrial Fans

Large fans are used in this ventilation type to push the particles from one area of a structure into another area of the same structure. This is successful because air that is in a high pressure area will automatically attempt to travel to a low pressure area. The fans can cause fire and debris to move from the high pressure area to an established exhaust point where it can be safely removed from the environment.

These systems are not frequently spoken of in most social circles. This is more than likely why you are unfamiliar with the term positive pressure ventilation. Large industrial companies have to use these methods of cleansing and purifying the air so that their employees can safely work in their factories.

Exhaust Fan Systems

Many things that are created cause harmful fumes, gases, and particles to enter the air where they are being manufactured. Exhaust systems and fans are used to push the harmful particles from the room and into areas where it can be contained or where it will cause no danger to any living thing.

Schools and residential homes do not require this type of ventilation, it is primarily used in factories, and manufacturing companies that create chemicals, use chemicals, or create something that causes toxic fumes to occur.

There are some places that only need this type of ventilation system in a small portion of their structure. Some of them only need these systems in one room of their buildings. It is possible to buy the correct components to clean the air in these areas without installing the same type of system throughout the structure.

Most of the modern systems that do this have units mounted in the loft space above the rooms. Some of them have units installed in specifically designed cupboards that house them. Series of ducts connect the units and the individual areas within the structure.

You can have decentralized mechanical extract systems incorporated into your building system design so that certain rooms have a continuous extraction rate that can ultimately be increased or decreased from one remote control panel.

This allows contaminated air from wet rooms and areas like these to be removed and replaced with filtered air that has been tempered and rendered perfect. Each building has unique specifications and must have their systems custom designed and installed in order for the air in all areas to be rendered clean and breathable.

For more information about proper building ventilation please visit the ABB Blower company web site http://fanblower.com/dust_collector_unit.htm

Susann Terlitski
Designer of Industrial Air Handling Units
Fan and Blower Co.
abbblower@abbblower.com
http://www.fanblower.com/dust_collector_unit.htm
http://www.fanblower.com/air_curtain.htm

Positive Pressure Ventilation

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abbblower@abbblower.com

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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

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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
http://www.northernindustrialsupplycompany.com/outside/request2.html

Industrial Power Roof Ventilator

airknife@cogeco.ca

Oleg Tchetchel

chicagoblower

fan, ventilator, blower, exhaust, supply, filtered, axial, hooded, upbalst, downblast, skyvent, Power Roof Ventilator,wall fan, wall propeller fan, prop fan, propeller fan

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