Heatpump

Description

Example of a district-heating system heat pump system that uses heat from a heat source at low temperature, e.g. ambient temperature sea or river water and converts it into high-temperature heat for a district heating system. The process uses a two-stage compression, a condenser with sub-cooler that transfers heat to the district heating system, expansion, and bypass valves as well as the evaporator that takes up heat from the low temperature heat source.

Experiment

The system starts operating at a steady condition with a cold-side temperature of 14��C. At time t=3000s the temperature is ramped up to 19��C.

In addition, the user can change the speed for each compressor stage by using the corresponding inputs "speedSetpoint1" and "speedSetpoint2".

The default working fluid for the system is R134a. The user can change the medium, to investigate of working fluid, e.g. using R1234yf.

Output

The user can investigate all thermodynamic properties like temperatures, flows, pressures. Some high level KPIs like heating power, COP or compressor power can be viewed.