Retrofitting of an Inefficient District Heating Section

Climate zone:

Central European Weather

University POLITEHNICA of Bucharest (Romania) will test the integration of renewable energy sources in its existing district heating and cooling network, which is to date operated by a gas cogeneration system.

The existing district heating network is of arborescent type with consumers at the branch ends unable to benefit from the appropriate thermal level of the heat carrier. This worsens whenever new consumers are connected to the heating network.  

The target building is a research laboratory with a total surface of 400 m2. It is currently located at the end of one branch of the heating network; the heat is entirely provided by a gas-fired boiler.

WEDISTRICT proposes the integration of a hybrid system based on geothermal energy with heat pumps and solar energy. This comprises solar panels for powering the geothermal unit and solar thermal collectors for domestic hot water production during summer. The borehole heat exchanger of the heat pump could be used for cooling the building during the summer. Currently there is no cooling system installed in building.

Technologies planned for Bucharest demo site:

Solar thermal panels & Geothermal heat pump

Solar thermal panels for domestic hot water production, connected to the buffer tank.

Geothermal heat pump of about 20 kW to provide the heating of the building. The heat produced by the heat pump is stored in the buffer tank and used depending on needs to heat the spaces by means of fan coil units.

Photovoltaic panels

Photovoltaic panels installed on the building roof with an estimated power output of 15-20 kWel.

Intelligent energy management system

The equipment operation and control will be integrated into an intelligent energy management system.

Alcalá de Henares

New District Heating and Cooling Network


Non-renewable District Heating retrofitting