TRNSYS Type 8505 models the energy flows of a transcritical CO₂ heat pump capable of delivering high temperatures (up to approximately 140 °C).
The compressor performance is calculated using regression models based on the EN12900 and ARI 540 standards. The compressor motor frequency is variable, allowing flexible operation.
Control of the system is achieved by specifying:
- Compressor frequency
- High-pressure side CO₂ pressure
The model consists of:
-
Three gas coolers (high-pressure side)
→ dissipate heat -
One evaporator (low-pressure side)
→ absorbs low-temperature heat
The simulation provides the following results:
- Electrical power consumption of the compressor
- Heat transfer in:
- Gas coolers
- Evaporator
- Outlet temperatures of all heat exchangers
For more detailed information, refer to the official documentation of Type 8505.
-
Data File CO2/
Contains thermophysical data for CO₂ -
Data File Compressor/
Contains datasets used for compressor performance calculations -
TRNSYS Input file/
Contains input files for use with TRNSYS Simulation Studio -
Type 8505/
Contains:- FORTRAN source code
- Precompiled DLL
If the provided DLL is not compatible with your system, you can compile the source code using your own compiler.
This project is licensed under the GNU Lesser General Public License v3.0 (LGPL-3.0)
(29 June 2007)
Robert Weber