EVAP-COND, Version 5.0

EVAP-COND is a software package featuring NIST's simulation models EVAP and COND for finned-tube evaporators and condensers. The ‘tube-by-tube’ scheme in these simulation models allows for specifying complex refrigerant circuits, modeling refrigerant distribution between these circuits, and accounting for non-uniform air distribution. Simulation results provide local parameters for each tube, including refrigerant inlet and outlet quality, temperature, enthalpy, entropy, pressure drop, mass flow rate, and inlet and outlet air temperatures. EVAP-COND includes a module for optimization of refrigerant circuitry using computational intelligence methods.

EVAP-COND features

• Tube-by-tube or tube sectional simulation
• One-dimensional, non-uniform air distribution
• Simulation of refrigerant distribution
• Refrigerant circuitry optimization
• Condenser model capable of simulating above the critical point

Refrigerant Properties & REFPROP Integration

EVAP-COND uses refrigerant thermophysical properties based on the NIST Standard Reference Data 23; NIST Reference Fluid Thermodynamic and Transport Properties Database (REFPROP): Version 10.0 (https://www.nist.gov/srd/refprop), where refrigerant coefficients must be specified in individual files for each single-component fluid. To facilitate fast simulations, EVAP-COND uses look-up tables with refrigerant properties.

The EVAP-COND installation package includes pre-generated look-up tables for the following refrigerants: ammonia, isobutane, propane, R22, R32, R134a, R152a, R161, R404A, R407C, R410A, R444A, R446A, R447A, R450A, R452B, R454B, R460A, R507A, R513A, and R1234yf. The EVAP-COND installation package does not include REFPROP-compatible fluid files. (Only the R32 file is installed to allow you to run the tutorial example given in the Help Menu and to explore EVAP-COND features). The fluid files must be obtained by the user and loaded to C:>…>Documents>NIST>EVAP-COND>fluids, the designated EVAP-COND ‘fluids’ folder, for each refrigerant of interest. Additional refrigerant look-up tables can be generated using TableGen2, a utility available for free download on this website.

Installation Instructions

1. EVAP-COND Setup
   • Download EVAP-COND 5.0 Setup.zip.
   • Extract all files to a folder of your choice.
   • Double-click setup.exe and follow the prompts.
     The wizard will install the package, create a Start menu group, and place a shortcut on your desktop.

2. Loading Fluid Files

   After EVAP-COND has been installed, you must manually copy fluid files for single-component refrigerants of interest into C:>…>Documents>NIST>EVAP-COND>fluids.
   
   Refer to Installation Guidance for details.

3. TableGen2 Setup
   • Download the file TableGen2.zip and extract it to a user-accessible folder.
   • Review and follow the instructions provided in TableGen2_Info.pdf.

User Tips & Support

• Tutorials: Refer to the Help Menu for a comprehensive guide on input data preparation, program execution, and results analysis. It also includes a tutorial on ISHED (Intelligent System for Heat Exchanger Design) for refrigerant circuitry optimization.
• Display Issues: If the refrigerant circuitry schematic appears distorted on your monitor, manually adjust your PC display resolution to 1360x768 or 1600x900 via the Start button > Settings > Display > Display resolution.