Hydraulic Power
Compute hydraulic power P from pressure p and flow Q (with efficiency η).
Inputs
Formula
P = p·Q/60000 ÷ η (p:kPa, Q:L/min → kW)
p×Q sets power; it sizes the motor.
Fundamentals
Compute hydraulic power P from pressure p and flow Q (with efficiency η).
This tool computes Hydraulic Power from the formula: P = p·Q/60000 ÷ η (p:kPa, Q:L/min → kW)
History
Fluid mechanics and heat transfer were established in the 18th–19th centuries with steam engines and thermodynamics.
Engineering applications
Used for piping, heat-exchange and hydraulic system estimates.
Glossary
| Pressure p | Input parameter |
| Flow Q | Input parameter |
| Efficiency η | Input parameter |
| Hydraulic power P | Output result |
How to use
- Fill in Pressure p, Flow Q, Efficiency η in the Inputs section (watch the unit on each field).
- Click Calculate; the tool evaluates the formula shown above.
- Read Hydraulic power P in the results area.
Formula · Worked Example · Knowledge
Formula
核心计算关系：P = p·Q/60000 ÷ η (p:kPa, Q:L/min → kW)
输入变量：
- Pressure p
p— kPa - Flow Q
Q— L/min - Efficiency η
eta
输出结果：
- Hydraulic power P
P— kW
假设/适用：Flow formulas assume steady, incompressible, continuous flow; correct for compressible/high-speed.
Worked Example
根据公式 P = p·Q/60000 ÷ η (p:kPa, Q:L/min → kW)，取 Pressure p = 10,000 kPa；Flow Q = 60 L/min；Efficiency η = 0.9。
代入计算得：Hydraulic power P = 11.11 kW。
Key Points
- Flow formulas assume steady, incompressible, continuous flow; correct for compressible/high-speed.
- Reynolds Re sets laminar/turbulent; friction f depends on regime & roughness.
- Energy eqn includes elevation, pressure and velocity heads; keep units as length.
Parameters
Inputs
| Parameter | Symbol | Unit | Default |
|---|---|---|---|
| Pressure p (kPa) | p | kPa | 10000 |
| Flow Q (L/min) | Q | L/min | 60 |
| Efficiency η | eta | 0.9 |
Outputs
| Result | Symbol | Unit |
|---|---|---|
| Hydraulic power P | P | kW |
Applications
- Pipe flow rate and pressure drop
- Hydraulic cylinder force/speed design
- Flow-meter selection and calibration
FAQ
What formula does this tool use?
This tool computes per ISO / AGMA / ASME standard formulas: P = p·Q/60000 ÷ η (p:kPa, Q:L/min → kW)
How accurate are the results?
Results match input precision, based on SI units and common engineering approximations; for critical duty re-check with a safety factor.
Where is it used?
Pipe flow rate and pressure drop