District Simulation

The BuildingSystems library supports detailed energy analyses of city districts. For this purpose, huge data sets of building parameters, which describe the geometries and the constructions of all the building of a district have to be gained. The use of the GIS systems QGIS in combination with the Open eQuarter plug-in can generate these parameter data sets as an input for a Modelica city district model.

Features

  • Uses the Open eQuarter plug-in for QGis for the parameter analysis for large populations of buildings.
  • Based on the gained building parameters the Modelica district model is automatically generated with the tool CoTeTo for template based code generation.
  • The Modelica district model is able to calculate the dynamic heating and cooling demand of the entire district and for each individual building.
Image source: Apple Maps

Analyzed city district

City district "Winsstrasse" in the city center of Berlin.

Image source: UdK Berlin

Parameter analysis with Open eQuarter (1)

Number of stories per building.

Image source: UdK Berlin

Parameter analysis with Open eQuarter (2)

U-values of the opaque facades, determined on the base of the building age.

Image source: UdK Berlin

District simulation with Modelica

Modelica district model with 528 thermal low-order building models.

Image source: UdK Berlin

Simulation results (10 days in January)

Above: heating load of three buildings, center: outside air temperature, below: diffuse and direct horizontal solar radiation.