How Is Fan BHP Calculated?

How is fan horsepower calculated?

P = (Q x p)/(229 x ) or.P = (Q x PF)/(33,000 x ) or.P = (Q x Pw)/(6356 x ) Where: P = Power, hp.

Q = Flow Rate, cfm.

p = Pressure, lb/in2 Pf = Pressure, lb/ft2 Pw = Water Gauge, Inches.

= Efficiency coefficient..

How do you calculate air flow in a fan?

You measure the velocity at a points in the duct and find the average velocity in the exhaust duct is 400 FPM. Multiply 400 Feet per Minute times the area of the duct, which is . 35 square feet, to find 140 CFM exhaust fan airflow.

How much weight can a 1 hp motor lift?

Most engines use horsepower to describe how much work they can do in a given amount of time. The constant 1 horsepower equals 550 foot-pounds per second. In other words, 1 horsepower is the amount of work required to move a load of 550 pounds over 1 foot, in 1 second.

What is the power of fan?

Power Consumption of a Ceiling FanSpeedAtomberg Ceiling FansOrdinary Ceiling FanSpeed 16 Watts16 WattsSpeed 210 Watts27 WattsSpeed 314 Watts45 WattsSpeed 419 Watts55 Watts1 more row•Aug 4, 2017

Is all horsepower equal?

Does one horsepower equal one horse? Not quite. It’s a common misconception that one horsepower is equal to the peak power production of a horse, which is capable of a maximum of around 14.9 horsepower. By comparison, a human being is capable of approximately five horsepower at peak power production.

What is better to have torque or horsepower?

In simple terms, you can think of torque as a measure of how much work your vehicle can do. A healthy amount of torque is what pulls you up hills and helps you haul trailers around. Horsepower is all about speed and keeping your car moving. In general, more horsepower means you’re getting a faster car.

What horsepower is 5252?

One horsepower is equal to 33,000 foot-pounds of work per minute. Add in the equations relating to torque and velocity, and you’ll find that horsepower always equals torque multiplied by rpm, divided by 5,252. Canceling out the equal variables, you wind up with horsepower equaling torque… at 5,252 rpm.

What’s the difference between BHP and HP?

HP is the output horsepower rating of an engine, while BHP is the input brake horsepower of an engine. … B HP is the measurement of an engine’s power without any power losses, while HP is BHP less the power losses.

How do I calculate my horsepower?

The equation to calculate horsepower is simple: Horsepower = Torque x RPM / 5,252.

What is the static pressure of a fan?

Static Pressure Fan static pressure is measured in inches of water gauge. One pound per square inch is equivalent to 27.7” SP. Static pressure in fan systems is typically less than 2” SP, or 0.072 Psi.

What is the formula for CFM?

Start with the total volume of air (in cubic feet), divide by the exchange rate (how quickly you want to replace the air), and the result is the total CFM you need for your system. Keep in mind that many applications (especially large areas) use more than one fan/blower.

Does a fan increase air pressure?

No gas, means no pressure. … In a moving stream of air, such as a fan, the air pressure is always lower than in air standing still. But the more RPM the fan is spinning, the more the air ‘blows’ in that direction of course.

How fast does a 5 hp motor go?

The 5hp engine will put you in the 10mph range, while the 7.50-10hp engines will push you 15+ mph.

How do we calculate efficiency?

The work efficiency formula is efficiency = output / input, and you can multiply the result by 100 to get work efficiency as a percentage.

How much BHP is 1 HP?

BHP to kW conversion tableBrake horsepower (hp)Kilowatts (kW)0.1 hp0.075 kW1 hp0.746 kW10 hp7.457 kW20 hp14.914 kW19 more rows

How is fan efficiency calculated?

The total efficiency is calculated using the traditional airflow, pressure, and input power as measured per AMCA Standard 210. It does not take into effect the efficiency of the drive (belt drive) or the motor. Fan efficiency is defined as the air power divided by the fan input power. … wg Pt = Total pressure, in.

What is fan system effect?

System effect is the negative impact on fan performance that results when the fan is connected to a duct system. Fan curves and fan tables are developed by laboratory measurements with the fan installed under ideal conditions.