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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.
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Is 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.
Which energy is always conserved?
kinetic energy..........
Which is not conserved mass acceleration energy momentum?
Acceleration is not conserved. Energy can not be created nor destroyed. Mass and momentum are both conserved through a set time.
How does energy is conserved in a transfermation of energy?
Energy is neither used up nor destroyed, but it is converted into something else. In that way, it is conserved.
Is machanical energy always conserved?
No. Total energy is always conserved, but not so mechanical energy.
Is mechanical energy always conserved why or why not?
no it's not cuz if there is friction energy wont be conserved
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.
The total amount of energy before and after a chemical reaction is the same .Thus energy is what?
Therefore energy is conserved.
Is rock conserved in the same sense that energy is conserved?
Not really, no.
Which energy is always conserved?
kinetic energy..........
Which is not conserved mass acceleration energy momentum?
Acceleration is not conserved. Energy can not be created nor destroyed. Mass and momentum are both conserved through a set time.
How does energy is conserved in a transfermation of energy?
Energy is neither used up nor destroyed, but it is converted into something else. In that way, it is conserved.
How can tidal energy be conserved?
Tidal Energy can be conserved by using offshore turbines rather than underwater turbines.
How can energy be conserved from a nuclear weapon?
A tiny bit of the mass of each fissioned (or fused) atom is converted to energy. Energy is not conserver... Mass-Energy is conserved.
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.
