ThermoFluidCalc Engineering Report

Air-Cooled Steam Condenser (ACC) Thermal Sizing Analysis — 2026-08-23 20:56:22
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💨 Air-Cooled Steam Condenser Sizer (ACC)

Design and size power plant A-frame Air-Cooled Condensers (ACC): steam turbine backpressure, initial temperature difference (ITD), fan cooling air flow, and auxiliary electrical power.

⚡ Fortran 90 Engine Double Precision (IEEE 754) ✓ ISO / ASME Validated
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👁️ Consultations 29
⚡ Calculs faits 24
💾 Téléchargements 370 📦 Code Fortran 4.1 KB
📅 Mise en service Jun 2026
⏱️ Latence < 1 ms
⚡ Outils & Rapports :
💾 Télécharger Fortran 90

⚡ Power Plant A-Frame Air-Cooled Condenser Bundle

Real-time visual simulation: Steam turbine exhaust manifold, inclined finned tubes, and forced draft cooling fans

📝 Configuration & Presets

⚡ 400 MW CCGT ACC (12 Bays) ☀️ Desert Solar CSP (42°C) 🪵 Biomass CHP Plant ♻️ Waste-to-Energy Plant
💨 Turbine Steam Exhaust & Ambient Climate
📐 A-Frame Bays & Fan Arrays
ACC Thermal Formulation:
• Saturation Temp: Tsat(Pback) from IAPWS-IF97 steam tables
• Initial Temp Difference: ITD = Tsat − Tamb [°C]
• Thermal Heat Duty: Q̇acc = ṁsteam · hfg [MWth]
• Fan Auxiliary Power: Pfan = (V̇air · ΔPair) / ηfan [kWe].

📊 ACC Performance Results

📊 Output Summary
💾 Fortran Source

Condenser Heat Rejection Duty (Q̇)
100.03 MWth
ITD: 19.0 °C | Steam Tsat: 49.0 °C
12 Fans @ 9.14m
Total Fan Electrical Power 378 kWe 31.5 kWe per fan
Cooling Air Volumetric Flow 2047 m³/s Air outlet = 71.7 °C
Total Finned Heat Transfer Area 22046 m² 12 A-frame bays
Overall Heat Transfer (U) 4537.6 W/(m²·K) Air-side finned reference

📈 Turbine Backpressure Pback (mbar) vs Ambient Temp Tamb (°C)

📊 Fan Auxiliary Power (kWe) vs Steam Mass Flow (t/h)

=================================================================
 THERMOFLUIDCALC — AIR-COOLED STEAM CONDENSER SIZING REPORT
=================================================================
Case Title                 : 400 MW Combined Cycle Power Plant Dry Cooling ACC
Steam Exhaust Flow         : 150.00 t/h (41.67 kg/s)
Ambient Temperature (Tamb) : 30.0 deg C
Turbine Backpressure (Pback): 120.0 mbar abs (Tsat = 49.00 deg C)
ACC Array Geometry         : 12 A-frame bays, 12 fans (Diam = 9.14 m)
-----------------------------------------------------------------
HEAT REJECTION DUTY (Q)    : 100.03 MWth
INITIAL TEMP DIFF (ITD)    : 19.00 deg C
Cooling Air Volumetric Flow: 2047.1 m3/s
Air Outlet Temperature     : 71.72 deg C
Total Finned Bundle Area   : 22046 m2
Overall Heat Transfer (U)  : 4537.57 W/(m2.K)
TOTAL FAN ELECTRICAL POWER : 377.9 kWe (0.38 MWe)
=================================================================

📘 Calculation Methodology & ACC Power Plant Standards

Direct Dry Cooling A-Frame Configuration

Exhaust steam from the steam turbine flows through large overhead steam distribution ducts into inclined finned tube bundles arranged in a 60° A-frame to minimize footprint and fan power.

Initial Temperature Difference (ITD)

ITD is the primary design metric in dry cooling: $ITD = T_{sat}(P_{back}) - T_{amb}$. Lower ITD values achieve deeper vacuum but require larger heat transfer areas.

Key Engineering Assumptions

  • Single-row or two-row flat steel/aluminum finned tube bundles.
  • Forced draft axial fans with typical static efficiency $\eta = 65\%$.
  • Zero water consumption, suitable for arid regions and water-constrained power plants.