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  ThermoFluidCalc — Standalone Fortran Execution Guide
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Calculator : Heat Exchanger — ε-NTU Method
Category   : Exchangers

Files Included:
  - heat_exchanger_ntu.f90 (Fortran 90/2008 Source Code)
  - input.txt (Pre-configured Sample Input)

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1. How to Compile
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Make sure you have GNU Fortran (gfortran) or Intel Fortran (ifort) installed.
Run the following compilation command in your terminal:

  gfortran -O3 heat_exchanger_ntu.f90 -o heat_exchanger_ntu

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2. How to Execute
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Run the compiled binary and pipe the input.txt file into stdin:

  heat_exchanger_ntu < input.txt

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3. Input Parameter Sequence
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Configuration (1=Parallel Flow, 2=Counter Flow, 3=Shell & Tube, 4=Cross Flow)
Hot fluid inlet temp Thi [Â°C]
Cold fluid inlet temp Tci [Â°C]
Hot fluid mass flow rate mh [kg/s]
Cold fluid mass flow rate mc [kg/s]
Hot fluid specific heat Cph [J/kg-K]
Cold fluid specific heat Cpc [J/kg-K]
Overall heat transfer coefficient U [W/m2-K]
Heat exchanger surface area A [m2]

Website : https://thermofluidcalc.com
