sci.fouling-factor-heat-exchanger Calculator
Calculates heat exchanger overall heat transfer coefficient with fouling resistance: 1/U_dirty = 1/U_clean + Rf_i + Rf_o. TEMA fouling factors: cooling water 0.0002 m²K/W; seawater 0.0001; steam 0.0001 — fouling can reduce U by 20–50%, requiring overdesign margin in heat exchanger sizing.
Inputs
- U Clean W M2K
- Reference formula or conversion factor shown for context.
- R Fi
- Opposition to current flow (Ω). V = IR. Resistors in series add; in parallel their reciprocals add.
- R Fo
- Opposition to current flow (Ω). V = IR. Resistors in series add; in parallel their reciprocals add.
- A M2
- Two-dimensional surface extent (m²). For complex shapes, break into simpler sub-shapes and sum.
Results
- fouled overall HTC U_fouled (W/m²·K)
- Reference formula or conversion factor shown for context.
- HTC reduction due to fouling (%)
- Sample size or count used in the calculation.
- excess area required for fouling
- The computed two-dimensional surface area.
- total fouling resistance Rf (m²·K/W)
- Opposition to current flow (Ω). Ohm's Law: V = IR. Lower resistance means more current for the same voltage.
- 1/U_fouled = 1/U_clean + Rfi + Rfo
- Sample size or count used in the calculation.
- cleaning schedule
- Sample size or count used in the calculation.
factor fouled overall heat reduction