Duct Sizing کا حساب کیسے لگائیں
Duct Sizing کیا ہے؟
Duct sizing balances airflow velocity, pressure drop, and cost. Proper sizing ensures system performance and efficiency.
مرحلہ وار گائیڈ
- 1Use friction loss tables or duct calculators
- 2Recommended velocity: main ducts 4-6 m/s, branches 3-4 m/s
- 3Size ducts for <25 Pa/100m static pressure drop
حل شدہ مثالیں
ان پٹ
CFM 2500, round duct, 0.15 mmWG friction
نتیجہ
Diameter ≈ 500 mm for low-loss duct design
Provides good velocity
عام غلطیاں جن سے بچنا ہے
- ✕Using velocity too high (noise and friction)
- ✕Neglecting pressure drop from fittings and dampers
اکثر پوچھے جانے والے سوالات
Why not use smallest possible ducts?
Small ducts have high velocity, high friction loss, and noise. Oversizing slightly saves fan energy.
How does duct insulation affect sizing?
Insulation doesn't affect sizing directly, but better insulation reduces equipment sizing needs.
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