Create EN 14511 Performance Map

The EN 14511 performance map defines heat pump capacity, input power, and COP across all combinations of air temperature and water inlet temperature. It is the foundation of the commercial AS/NZS 4234 simulation — the model interpolates within this map at each timestep to determine how the heat pump performs throughout the year.

What to Expect in the Data

Before importing, familiarise yourself with the test report. Key things to check:

• Test conditions match what was agreed. Confirm the water inlet temperatures and air temperatures (dry bulb / wet bulb pairs) in the report match the conditions specified in the EN 14511 Testing Guidance.
• Capacity, power, and COP values look physically reasonable. As a sanity check:
  • COP should generally increase as air temperature increases and as water inlet temperature decreases.
  • Capacity should increase at higher air temperatures.
  • If COP increases dramatically at a certain water temperature, check for an unusual refrigerant control behaviour (e.g. CO2 transcritical switching).
• Standby power is reported. This is typically listed separately in the test report and must be entered manually in the FAM_COM sheet.
• Units. Ensure capacity and power are in kW (not W). Most EN 14511 reports report in kW but confirm before entering data.

Entering the Data

Step 1: Go to the ComHPdata sheet in the Commercial TRNSYS Tool. Follow the instructions on the sheet.

Step 2: Enter the test data into the ComHPdata sheet — one row per test condition. The sheet requires:

• Air dry bulb temperature (°C)
• Air wet bulb temperature (°C)
• Water inlet temperature (°C)
• Heating capacity (kW)
• Input power (kW)
• COP (calculated or reported)

Step 3: Click the ‘Create Data File’ button. This generates the HP data file (HPdata.txt) and saves it to the Temp folder.

Step 4: The data file is now linked into TRNSYS. Re-run a test simulation and confirm the tool is reading the performance map without errors.

Validating the Performance Map

After creating the data file, it is worth doing a quick visual check:

• Open the HPdata.txt file and confirm the number of data rows matches the number of test conditions entered.
• In a test simulation, check that the HP is operating at COP values that seem physically consistent with the test data.
• If the simulation results show unrealistically high or low COP values at certain conditions, re-check the interpolation boundaries — the model will extrapolate outside the test matrix, so the outer boundary conditions need to be well-chosen.

Normalisation Calculations Export

VEU auditors require a copy of the ComHPdata sheet to verify how the performance map was derived from the raw test data. Before finalising audit files:

• Click the EXPORT button in the ComHPdata sheet.
• Save the exported file (HPdata.xlsx) to the 02-Client_Material folder.
• This file must be included in the TRNSYS Files folder within the submitted audit package.