How do you calculate pump power units?
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Pump Power calculation Formula: Pump Power P(kW) = q(m3/hr) x ρ(kg/m3) x g(m2/s) x h(m) x p(Pa) / 3600000. The same way pump power in horsepower formula can be written as, Pump Power P(HP) = q(m3/hr) x ρ(kg/m3) x g(m2/s) x h(m) x p(Pa) / 2685600. Also above pump power is required to lift the liquid to head meters.
What is the unit of pump power?
kW
The input power “P” of a pump is the mechanical power in kW or Watt taken by the shaft or coupling. So the input power of the pump also called Break Horse Power (BHP). Pump input BHP is the power delivered to the pump shaft and is designated as brake horsepower. so pump input power also called as pump shaft power.
How do you calculate the temperature rise of a pump?
Pump Temperature Rise Formulas: ΔT = (H * (1 – η ) )/(778 * U* η). where: ΔT = temperature rise, °F.
How do you calculate the HP of a pump in SI units?
Horsepower is the unit of power to define hydraulic or water horsepower. In System International System (SI) it is in kilowatts (kw)….Pump Hydraulic Horsepower.
| Hydraulic Horsepower and Kilowatt Equations | ||
|---|---|---|
| Hydraulic HP | = | Head (ft) x Flow Rate (gpm) x (Specific Gravity) |
| = | 8.3 | |
| SI Units | ||
| Pump Discharge Pressure | = | 30.48 meter |
What is the formula for power rating?
Calculate power rating in KVA when you know voltage and output resistance. Use the formula: P(KVA) = (V^2/R)/1000 where R is resistance in ohms. For example, if V is 120 volts and R is 50 ohms, P(KVA) = V^2/R/1000 = (14400/50)/1000 = 288/1000 = 0.288 KVA.
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) ÷ 600 – where power is in kilowatts [kW], P is the pressure in bars, and Q is the flow in litres per minute.
How do you calculate pump efficiency?
How Do You Calculate Pump Efficiency?
- Efficiency = Output Power / Input Power.
- Output Power = Flow Rate * Total Head.
- Total Head = Discharge Pressure + Elevation Head.
- Elevation Head = Elevation Change (ft) * 0.434 PSI / ft H2O.
- Total Head = 10,000 PSI + 8.67 PSI.
- Efficiency = 851.67 HP / 1,000 HP.
How temperature affect the pump performance?
The results showed that the pump head and pump efficiency increase with the decrease of water temperature. The results showed that increasing water temperature speeds up cavitation.
What is the formula for calculating BHP in SI unit?
1. BHP = (2πnFR ) / 33000,where 2πnFR = Power in lb -ft per min. A ) BHP = (2πnT ) /33000 ,2πnT = Power in lb-ft per min.
How is motor power calculated?
Power = (Force x Distance) / Time For electric motors, power or horsepower can be calculated from the torque and speed. For example, if you have a motor rated for 3,000 RPM and 6 in-lbf then the horsepower is calculated below.
How is motor power rating calculated?
Multiply the motor voltage by the full-load current. The result is in watts. Divide watts by 1,000 to give kilowatts. For example, 230 volts x 20 amps = 4,600 watts; 4,600 watts divided by 1000 = 4.6 kilowatts.
What is the SI unit of pump efficiency?
H = head, ft. Q = flow, gpm. SG = specific gravity. η= pump efficiency, decimal. SI Units: P = (Q * H * SG) / (367 * η) where: P = power, kW.
How to calculate the power of a pump?
Pump Power P (kW) = q (m3/hr) x ρ (kg/m3) x g (m2/s) x h (m) x p (Pa) / 3600000. Pump Power P (HP) = q (m3/hr) x ρ (kg/m3) x g (m2/s) x h (m) x p (Pa) / 2685600. Also above pump power is required to lift the liquid to head meters. But for calculating the net suitable motor, you need to calculate the shaft power of the pump.
What is the theoretical power of a pump?
The theoretical pump power can be calculated as Ph (kW) = (1 m3/h) (1000 kg/m3) (9.81 m/s2) (10 m) / (3.6 106) = 0.027 kW
What does η mean in pump efficiency?
η = pump efficiency, decimal. P = power. P = power, horse power. Q = flow, gpm. SG = specific gravity. η= pump efficiency, decimal. P = power, kW. H = head, m.