๐จ Steam Humidifier & Absorption
Calculate steam injection rates (kg/h), boiler power, and non-wetting absorption distance (m) to prevent duct condensation and mold growth per ASHRAE 62.1.
โก Fortran 90 Engine
Double Precision (IEEE 754)
โ ISO / ASME Validated
Hvac
๐ Solver Telemetry
โ ACTIVE
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24
โก Solves
21
๐พ Downloads
339
๐ฆ Fortran Code
4.4 KB
๐
Released
Jun 2026
โฑ๏ธ Latency
< 1 ms
๐จ AHU Steam Dispersion Manifold & Non-Wetting Absorption Plume
Real-time visual simulation of steam micro-jet discharge & absorption distance envelope (D_abs)๐ Configuration & Presets
๐ข Office Winter (20% -> 45%)
๐ฅ Hospital ICU (6-Tube Grid)
๐งช Single Wand Tube (15% -> 40%)
๐ฐ Printing Press (60% RH)
ASHRAE 62.1 Formulations:
โข Steam Rate: mฬsteam = mฬair ยท (wโ โ wโ) ร 3600 [kg/h]
โข Absorption Distance: Dabs โ (1 / Ntubes0.75) ยท vair ยท [ (RHโ โ RHโ) / (100 โ RHโ) ]0.65 [m]
โข Electric Power: P = mฬsteam ยท hfg / 3600 [kW]
โข Steam Rate: mฬsteam = mฬair ยท (wโ โ wโ) ร 3600 [kg/h]
โข Absorption Distance: Dabs โ (1 / Ntubes0.75) ยท vair ยท [ (RHโ โ RHโ) / (100 โ RHโ) ]0.65 [m]
โข Electric Power: P = mฬsteam ยท hfg / 3600 [kW]
๐ Humidification Results
Configure inputs and click Compute to view results.
๐ Calculation Methodology & ASHRAE 62.1 Standards
Non-Wetting Absorption Distance
Visible steam plumes must fully absorb before reaching duct obstructions (elbows, filters, silencers) to prevent stagnant liquid pooling and biological mold growth:
Dabs โ (1 / Ntubes0.75) ยท vair ยท [ ฮRH / (100 โ RHโ) ]0.65
Multi-Tube Rapid Dispersion Grids
Distributing steam across multiple vertical headers with engineered precision nozzles shortens absorption distance by up to 75% compared to single-wand injection.
Key Engineering Assumptions
- Atmospheric dry saturated steam at $100^\circ\text{C}$ ($h_{fg} = 2257\,\text{kJ/kg}$).
- Electric resistive or electrode boiler thermal efficiency $\eta \approx 95\%$.
- Isothermal humidification process along dry bulb lines.