管道摩擦损失计算器 — 公式
## Hazen-Williams Formula
**h_f = 10.67 x (Q / C)^1.852 / D^4.8655 x L**
This empirical formula is widely used for water distribution systems. C is the roughness coefficient (150 for new PVC, 130 for copper, 100 for old steel). Results are in feet of head; multiply by 0.4333 for psi.
**h_f = 10.67 x (Q / C)^1.852 / D^4.8655 x L**
This empirical formula is widely used for water distribution systems. C is the roughness coefficient (150 for new PVC, 130 for copper, 100 for old steel). Results are in feet of head; multiply by 0.4333 for psi.
计算示例
15 GPM through 1-inch copper (C=130) for 100 feet.
- h_f/100ft = 10.67 x (15/130)^1.852 / (1/12)^4.8655
- Compute numerator and denominator using the formula
- Total head loss for 100 ft is approximately 12.5 ft
- Pressure loss = 12.5 x 0.4333 = 5.42 psi