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Fan power requirements are a function of the CFM (cubic feet per minute) to the cube power. Fan hp = (cfm)3. If a fan at 10,000 CFM uses 10 hp (horsepower), then that same fan running at 9,000 CFM will use (0.9 x 0.9 x 0.9 x 10 hp) = .72 x 10 hp = 7.2 hp - in theory. A electronic variable speed drive (VFD) is the best choice of system to operate a fan at different speeds.
In practice there are certain mechanical losses within the entire fan system that reduce the efficiency such that a 10% reduction may be closer to 7.5 or 7.8 hp. Nevertheless, given that ALL fans for HVAC applications are sized for the worst conditions (usually the warmest day of the year), virtually all can operate at 90% output, and usually much less, for most of the year. A fan variable speed drive is the single most important energy saving measure possible with almost all heating and air conditioning applications.
What else can I help you with?
In a collision what is conserved?
Momentum is conserved in a collision. If two cars have the same mass and are traveling at the same speed and collide headfirst, the momentum of both cars cancel each other out and they will be motionless. If one has greater speed or mass than the other, it will still have the difference in momentum after the collision.
Is energy always conserved in the universe?
Energy is always conserved in a closed system, according to the law of conservation of energy. However, in the universe as a whole, energy may not be conserved due to the expansion of space-time, which can lead to a net increase in energy.
What quantities are conserved in an inelastic collision?
In an inelastic collision, momentum is conserved. However, kinetic energy is not conserved as it is transferred to other forms such as heat, sound, or deformation energy.
Is mechanical energy always conserved why or why not?
Mechanical energy is not always conserved. It can be converted into other forms of energy such as heat, sound, or work, due to external forces like friction or air resistance acting on the system. In the absence of non-conservative forces, mechanical energy is conserved according to the law of conservation of energy.
Is the total energy conserved in an inelastic collision?
In an inelastic collision, the total energy is not conserved because some of the kinetic energy is transformed into other forms of energy, such as heat or sound.
Is machanical energy always conserved?
No. Total energy is always conserved, but not so mechanical energy.
Mechanical energy always conserved why or why not?
no it's not cuz if there is friction energy wont be conserved
In a collision what is conserved?
Momentum is conserved in a collision. If two cars have the same mass and are traveling at the same speed and collide headfirst, the momentum of both cars cancel each other out and they will be motionless. If one has greater speed or mass than the other, it will still have the difference in momentum after the collision.
Is rock conserved in the same sense that energy is conserved?
Not really, no.
Is energy always conserved in the universe?
Energy is always conserved in a closed system, according to the law of conservation of energy. However, in the universe as a whole, energy may not be conserved due to the expansion of space-time, which can lead to a net increase in energy.
What quantities are conserved in an inelastic collision?
In an inelastic collision, momentum is conserved. However, kinetic energy is not conserved as it is transferred to other forms such as heat, sound, or deformation energy.
The total amount of energy before and after a chemical reaction is the same .Thus energy is what?
Energy is conserved in a chemical reaction, meaning the total amount of energy before and after the reaction remains constant. This principle is known as the law of conservation of energy.
Is mechanical energy always conserved why or why not?
Mechanical energy is not always conserved. It can be converted into other forms of energy such as heat, sound, or work, due to external forces like friction or air resistance acting on the system. In the absence of non-conservative forces, mechanical energy is conserved according to the law of conservation of energy.
Will the total energy of a vibrating body is conserved if friction occur?
Energy is always conserved. When friction is present, the energy usually just turns into heat.
How can energy resources be conserved?
biomass can be conserved by turning it into usable fuels
Is the total energy conserved in an inelastic collision?
In an inelastic collision, the total energy is not conserved because some of the kinetic energy is transformed into other forms of energy, such as heat or sound.
Is potential energy conserved or not measurable?
It is not conserved. Total energy is conserved, but specific types of energy are usually not conserved. Not sure what you mean by "measurable" - potential energy is usually calculated, on the basis of other quantities. For example, in the case of gravitational potential energy, PE = mgh (mass x gravity x height), all of which can be measured.
