Within future city district it is expected that the space heating demand
will be considerably reduced due to better insulation of buildings, while the
demand for domestic hot water (DHW) is expected to remain constant. Modern
buildings will enable the supply of low temperature district heating (e.g. 40 °) for space heating. Low
temperature district heating is advantageous as renewable heat sources can be
integrated more efficiently and heat losses to the environment are reduced.
However, the supply temperatures for domestic hot water have to remain above 55
°C in order to avoid Legionella bacteria. One possible solution is to use a
booster heat pump that uses the district heating line as a heat source and heats
up the domestic hot water.
Figure 1 Schematic diagram of the Booster HP, Propane
is used as refrigerant
Further, the use of heat pumps for heat supply also enable the use of
electricity when there is a surplus on the generation side and thus provide
flexibility to the electric grid. In order to analyse the flexibility potential
of the booster heat pump, the dynamics of the system have to be understood.
Possible topics include:
the heat pump behaviour for different operation conditions
and validation of a black box model of the heat pump
using other working fluids
The project can be carried out by one or two students, who should be
very interested in working experimentally and preferably already have
Wiebke Meesenburg, firstname.lastname@example.org, Rum 403-009
Torben Schmidt Ommen, email@example.com, Rum 403-024