Pumping power equation

How is pump power calculated?

Mechanical energy provided to the liquid (For example, distribution network of drinking water):P = Power transmitted to the fluid by the pump in Watt.Q = Flow in m3/s.p = density of the liquid in kg/m3.Hm = Hydraulic pressure loss network expressed in m.H = Hydraulic load in meter of water.

How is pump motor rating calculated?

Calculate the horsepower nameplate rating of the motor, when the pump capacity is 550 gallons at 300ft pressure head, at 89 percent pump efficiency (η), and motor efficiency (η) is 92 percent. Step 4, Motor indicate horsepower (IHP) Motor IHP is equal to motor brake horsepower divided by the motor efficiency.

How do you calculate hydraulic power of a pump?

Hydraulic power is defined as flow multiplied by pressure. The hydraulic power supplied by a pump is: Power = (P x Q) ÷ 500 – where power is in kilowatts [kW], P is the pressure in bars, and Q is the flow in litres per minute. ** based upon 100% efficiency; 90% efficiency would equate to 90 ÷ 0.9 = 100kW.

How is pump head calculation?

If the water level is 10 feet below the pump suction connection then the static head will be 10 + 15 = 25 feet. Therefore the total head will have to be at least 25 feet plus the friction head loss of the fluid moving through the pipes.

What is unit power of pump?

Horsepower is the unit of power to define hydraulic or water horsepower. In System International System (SI) it is in kilowatts (kw). The input power delivered by the motor to the pump is called brake horsepower (bHp). The difference between the brake horsepower and hydraulic power is the pump efficiency.

How much HP pump do I need?

Horsepower theoretically required for pumping water equals the gallons per minute multiplied by the head in feet, and divided by 4.000 For power recommended, divide by 2000 instead of 4000.

How do I calculate flow rate?

Q=Vt Q = V t , where V is the volume and t is the elapsed time. The SI unit for flow rate is m3/s, but a number of other units for Q are in common use. For example, the heart of a resting adult pumps blood at a rate of 5.00 liters per minute (L/min).

How many liters per minute does a 1 hp pump pumps?

80 Litres

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What is pump efficiency?

Pump efficiency (η) is also referred to as coupling or overall efficiency and characterises the ratio of pump power output (PQ) to power input (P) for the operating point in question: Pump efficiency (η) is the product of mechanical (ηm) and internal efficiency (ηi).

What is 3960 pump calculation?

The “3,960” is a horsepower expressed in pump terminology. This pump would burn 18.1 horses or 13.5 kilowatts (1-Hp = . 746-kw).

What is the difference between hydraulic power and shaft power?

The shaft power is dependent on the hydraulic power, the power to be transmitted to the fluid, and the efficiency of the pump which takes into account all the losses that happens when converting the shaft power to the hydraulic power. The shaft power is also called the absorbed power.

What is BKW of motor?

Bkw (brake kilowatts) is the power actually required to drive a piece of equipment. In this context, kw would be the power rating of the chosen driver. (Oftentimes the next standard size larger than the bkw.) Tornado is right about bkW is power actually required to drive a piece of equipment.

How do you convert TDH to PSI?

The relationship between PSI and feet of head is that 2.31 feet of head = 1 PSI. Translated, that means that a column of water that’s 1-inch square and 2.31 feet tall will weigh 1 pound. Or, one-foot column of water that’s 1-inch square weighs .

How is pump suction head calculated?

Explanation: To calculate NPSH Available, take the source pressure , add the atmospheric pressure , subtract the losses from friction within the pipeline and subtract the vapor pressure of the fluid . The result equals the NPSHA (or Net Positive Suction Head Available) of your system.

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