Here's the recent articles submitted by oleg tchetchel
Articles By oleg tchetchel
Air Make Up Fans
By: oleg tchetchel
The lack of make-up air in a building can cause serious problems. Many times the problems are not even recognized and show themselves in ways that most people do not think about. A properly designed and installed ventilation system provides environmental control by avoiding negative pressure. Uncontrolled infiltration of air through window sashes, doors and walls leads to many undesired results. In this document we will discuss a few of these problems and inform you about the cost of make-up air.(read
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View : 286 Times
Category : Service
Proper Building Ventilation
By: oleg tchetchel
The volume of air required to operate a ventilating and cooling system is a very fundamental requirement. Before air volume is estimated or calculated, careful consideration should be given to the following factors. Be sure that the decision you make will accomplish the most important objectives or will overcome the most important problems. This should be the overriding consideration in the selection of a system of ventilation. Availability of money to finance the system is a factor that must be considered early in the planning stage. The funds available will affect the objectives you set and will influence the system of ventilation selected to meet the objectives.(read
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View : 216 Times
Category : Real Estate and Foreclosure
How To Ventilate Building
By: oleg tchetchel
One of the "work horses" of many ventilation and cooling systems is the wall-mounted exhaust fan. A mounting panel attaches the fan to the inside face of a wall opening. An automatic or motor-operated wall shutter is mounted on the outside face of the wall to provide weather protection when the fan is not in operation. These wall exhausters are available in a wide range of sizes and capacities. American Coolair has models with blade diameters from 7" to N4". Capacity ranges from 250 cubic feet per minute (CFM) to approximately 100,000 CFM from a single fan. Fans of this type are quite efficient, dependable and require relatively little maintenance. Minor disadvantages may relate to their wall location. This location may result in interference with operations of the building, may cause damage to the fan itself or it may be a possible disturbance to personnel working in the proximity of the fan.(read
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View : 269 Times
Category : Service
Commercial Ventilating
By: oleg tchetchel
A work stoppage or strike may occur if the problem of personnel discomfort is unresolved. The benefits from a solution to such a situation are enormous. In plants where there is a high density of employees and many manual operations involved, an improvement in the environment can produce substantial benefits in terms of increased production, reduced errors, and a decline in complaints and absenteeism among employees. In other circumstances, the attentiveness of an audience or student group may be a factor that spells success or failure for the project. There is a Buffalo Fan case history where a high ambient temperature had actually reduced the capacity of a big power turbine. To obtain rated performance by the machine, an improvement in the room ventilation and cooling system was necessary. When this was accomplished, the plant management was amazed to find an equivalent improvement in the efficiency of the employees who were required to work in this same environment with the machine.(read
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View : 246 Times
Category : Service
Commercial Ventilation
By: oleg tchetchel
Humans are warm blooded animals whose normal body temperature is 98.6° Fahrenheit. However, we are most comfortable when the air temperature around us is in the 72°-to-78° range. If there is air motion around us, the effect of "wind chill", or evaporative cooling, enables us to feel comfortable in a much higher air temperature. As the natural air temperature in most non-air conditioned buildings is much warmer than outside air temperatures, the problem of keeping humans comfortable is primarily a cooling problem. Of course, this is not the case in periods of very cold weather. Our purpose is to discuss the environmental problems that frequently exist in periods of moderate to hot weather. An effective, economical solution of these problems is vital to the success of any business.(read
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View : 224 Times
Category : Real Estate and Foreclosure
Explosion Proof Fans
By: oleg tchetchel
Fans are often used to handle a variety of gases, dusts and materials other than clean air. Some of these gases and solid particles are combustible. When mixed at certain concentrations, ignition can result in an explosion. Even systems which are normally “safe” can become explosive under abnormal conditions. System designers must consider the safety hazard that each component of the system carries. This discussion presents some considerations that must be given to the fan.(read
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View : 209 Times
Category : Business
Fan Performance Curve
By: oleg tchetchel
The fan curve is a graphic presentation of fan performance. It is one of the most useful tools available during the fan selection process. While multi-rating tables are convenient (see page 12), performance curves offer additional information such as - how much reserve pressure head exists between the design pressure and the peak static pressure, the maximum power the fan might draw, and the efficiency of operation.(read
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View : 236 Times
Category : Education
Fan Vibration
By: oleg tchetchel
There is a trend in the fan industry that is causing significant changes in fan design and in the manner in which fans are marketed. As a result of the maturing vibration measuring instrumentation market, computer software and maintenance training programs have been adapted which equate “low vibration” with long life, igher quality, and lower maintenance costs. The fan manufacturers used to be the “vibration experts” and set the tolerance for acceptable levels of vibration.(read
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View : 215 Times
Category : Education
Kitchen Exhaust Fans
By: oleg tchetchel
NFPA 96 Ventilation Standard provides the minimum fire safety requirements related to the design, installation, operation, inspection, and maintenance of all public and private cooking operations except for single family residential usage. The requirements include, but are not limited to, all manner of cooking equipment, exhaust hoods, grease removal devices, exhaust ductwork, exhaust fans, dampers, fire extinguishing equipment and all other components or systems that are involved in the capture, containment and control of grease-laden cooking residue. The provisions of this standard are considered necessary to provide a reasonable level of protection from loss of life and property from fire and explosion. This standard is intended to be applied as a whole.(read
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View : 223 Times
Category : Service
Turbo Blowers And Fans
By: oleg tchetchel
Gas turbine 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.(read
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View : 208 Times
Category : Business
