Heat Exchanger کا حساب کیسے لگائیں
Heat Exchanger کیا ہے؟
Heat exchanger effectiveness and sizing depend on flow rates, temperatures, and heat transfer area. Design ensures adequate thermal transfer.
فارمولا
Calculate: Q = U×A×ΔT_lm (log mean temperature difference)
- Q
- U×A×ΔT_lm (log mean temperature difference) — U×A×ΔT_lm (log mean temperature difference)
- U
- U value — Variable used in the calculation
- A
- A value — Variable used in the calculation
مرحلہ وار گائیڈ
- 1Calculate: Q = U×A×ΔT_lm (log mean temperature difference)
- 2Account for flow arrangement (counterflow, cross-flow, parallel)
- 3Size area for required heat transfer
حل شدہ مثالیں
ان پٹ
Q = 50 kW, U = 2000 W/m²·K, ΔT_lm = 10 K
نتیجہ
A ≈ 2.5 m² required
Determines exchanger size
عام غلطیاں جن سے بچنا ہے
- ✕Using arithmetic mean instead of log mean temperature difference
- ✕Neglecting fouling resistance
اکثر پوچھے جانے والے سوالات
Why is counterflow more efficient?
Counterflow maximizes temperature driving force throughout; parallel-flow has smaller LMTD.
What determines overall U coefficient?
U depends on fouling, scale, fluid properties. Typical 500-5000 W/m²·K depending on fluids.
حساب کے لیے تیار ہیں؟ مفت Heat Exchanger کیلکولیٹر آزمائیں۔
اسے خود آزمائیں →