First large coverage solar cadaster for building facades

1

First large coverage solar cadaster for building facades using LiDAR data and City Models

Frederic Petrini-Monteferri, Volker Wichmann, Christian Georges, Laserdata GmbH

Markus Posch, STEPS F&E OG

Magnus Bremer, University of Innsbruck

Stefan Dürauer, Christian Sam Magistrat City of Vienna, MA 41

AGIT Symposium 2014

First large coverage solar cadaster for building facades

Motivation

State of the art: Solar potential calculations for roofs and open space

So far: No consideration of energy relevant building facades

Solar heating / cooling / modernizing insulation of buildings

Sun duration (real estate market)

Now: New approach for insolation calculation of building facades * * Project funding by the Government of the Province of Tyrol; first commercial rollout: City of Vienna

First large coverage solar cadaster for building facades

3

INPUT: Building Model CityGML + LiDAR data

160.000 buildings

complete Vienna

First large coverage solar cadaster for building facades

4

328 Mio m² facades + 52 Mio m² roofs

LOD 2 with measured eaves height

INPUT: Building Model CityGML + LiDAR data

First large coverage solar cadaster for building facades

5

LiDAR data with 0.5 Meter grid cell size for shadow effects on

building facades and for insolation calculation on roofs

INPUT: Building Model CityGML + LiDAR data

First large coverage solar cadaster for building facades

6

Processing: Generation of synthetic points on CityGML building facades

First large coverage solar cadaster for building facades

7

Processing: Calculation of ASPECT / SLOPE based on CityGML building facades

N N W S O

First large coverage solar cadaster for building facades

8

Processing: Solar Insolation Calculation

Input - Point Cloud with synthetic points for building facades with attributes slope, aspect - Digital raster surface model from LiDAR data

Insolation calculation - Definition of output data sets: + direct insolation + diffuse insolation + total insolation + sun duration … - Geographic coordinates of the area of interest - Time resolution = interval for insolation simulation (e.g. every 30 min) - Time period (day, month, year) - Method for aggregation of insolation and sun duration values - Meteorological correction

Output - Point cloud with insolation / sun duration and conversion to CityGML textures

First large coverage solar cadaster for building facades

9

Shadow relevant objects from LiDAR data in front of building facades

Processing: Solar Insolation Calculation

First large coverage solar cadaster for building facades

10

Yearly solar potential [kWh/m²]

0 900 Yearly solar potential

Processing: Solar Insolation Calculation Facades

First large coverage solar cadaster for building facades

11

Yearly solar potential [kWh/m²]

0 900 Jahressolarpotenzial

Processing: Solar Insolation Calculation Facades

First large coverage solar cadaster for building facades

12

Insolation results from facades and roofs = first large coverage solar cadaster for complete building hull

Applications:

Photovoltaic and solarthermal earnings

Positioning of moduls

on facades/roofs

Facade specific insulation of buildings

Sun duration for real

estate market

First large coverage solar cadaster for building facades

Integration at the municipality of the City of Vienna

Available to all city departments via internal 3D-Webviewer of the municipality

Integration of solar potential of facades / roofs and sun duration

Important thematic layer for City Model

13

First large coverage solar cadaster for building facades

14

Results: Solar potential facades / roofs

[kWh/m²]

First large coverage solar cadaster for building facades

15

Results: Mean yearly sun duration [h]

First large coverage solar cadaster for building facades

16

Technological Outlook More detailed insolation analysis of single buildings

Calculation of heating input into buildings

First large coverage solar cadaster for building facades

17

Technological Outlook More detailed insolation analysis of single buildings

Calculation of heating input into buildings

First large coverage solar cadaster for building facades

18

Contact

Laserdata GmbH Frederic Petrini-Monteferri

Technikerstr. 21a 6020 Innsbruck

www.laserdata.at petrini@laserdata.at

First large coverage solar cadaster for building facades using LiDAR data and City Models