TRNSYS Template Selection
Explanation of TRNSYS Templates used for AS/NZS 4234 modelling.
Many templates have been developed for different HP technologies and operating modes.
HP Types
Integral HP: Condenser (refrigerant-to-water heat transfer) is built into the tank — wrap-around coil, microchannel, or internal coil.
Separate HP: Condenser is in a separate unit with pumped water circulation to the tank via a heat exchanger.
Template Selection
Choose a template based on condenser type, legionella control strategy, and use of electric elements.
| Template name | Description |
|---|---|
| Integral_HP | Standard template. Wrap-around condenser: HXmode = 4. Internal coil HX: HXmode = 5. |
| Integral_HP_Daily55Weekly60 | Allows once per week 60degC boost with HP to allow rest of the week with a lower setpoint i.e. 50-55degC. |
| Integral_HP_ElecTop | Integral HP with option to trigger element using top sensor. Used for commercial applications. |
| Integral_HP_WeeklyElecBoost | Integral HP with element used for weekly legionella boost. |
| Integral_HP_PreheatFinishing | One integral HP as a preheat system with another in series used for finishing. |
| Integral_HP_VSET | Integral HP with monthly variable set point. |
| Integral_HP_OSB | Integral HP with one shot boost. |
| SEPARATE HEAT PUMPS | |
| Separate HP | Standard separate HP template describing HP unit with pumped water circulation to tank, with fixed water flow rate. |
| Separate_HP_VariableFlow | Standard separate HP template describing HP unit with pumped water circulation to tank, with variable water flow rate. |
| Separate_HP_Daily55WeeklyElec60 | Separate HP with element used for weekly legionella boosting. |
| Separate_HP_Daily55WeeklyElec60_VariableFlow | Separate HP with element used for weekly legionella boosting, with variable water flowrate to achieve prescribed HP outlet temp. |
| Separate_HP_Daily55WeeklyHP60 | Separate HP with HP used for weekly legionella boosting, daily boosting can be less than 60degC. |
| Separate_HP_Daily55WeeklyHP60_VariableFlow | Separate HP with HP used for weekly legionella boosting, daily boosting can be less than 60degC, with variable water flow rate to achieve prescribed HP outlet temp. |