Hi Marc,
You can see the equations for the HTF properties in the source code for TRNSYS Type 229: sam_mw_pt_Type229.f90. That file should be in your SAM installation folder, which by default in Windows is c:\SAM\2012.5.11\exelib\trnsys\source.
For example, the enthalpy of the Hitec fluid at 175 degrees C in the spreadsheet (
XLSX 23 KB
) is 273,000 J/kg. The equation in Line 950 of the source code file is H_salt_hitec = 1560 * T. At 175 deg C, the value is 1560 * 175 = 273,000.
Best regards,
Paul.