Compute pump shaft (input) power by P = rho*g*Q*H/eta from fluid density, gravity, flow, head and efficiency.
由流量、扬程与效率,按 P = ρgQH/η 计算水泵轴功率(输入功率)。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Pump shaft power | P = ρgQH ÷ η with efficiency η (centrifugal 60%–85%) | Basic pump energy equation |
| Total head | H = static lift + friction losses + velocity-head difference | System-head computation |
| Motor sizing | Motor = shaft power ÷ motor efficiency × safety 1.1–1.3 | Equipment-sizing practice |
| Specific speed | ns = 3.65n√Q ÷ H^0.75 selects impeller type | Standard pump-type selection |
工作与生活中的相关计算与查询。