Sensitivity of calculated solar irradiation to the level of detail: insights from the simulation of four sample buildings in urban areas

The assessment of the solar potential in urban areas relies on a geometrical model that can be defined at different levels of detail (LOD). In this work we compare the solar irradiation simulated on the surfaces of four sample buildings, which were modeled at three different LODs as defined by the CityGML standard. Results indicate a general overestimation of the solar irradiation when using LOD1 and LOD2 models, if we consider LOD3 (i.e. the finer model) as the ground truth. However, results show also that the error varies significantly between the analyzed buildings and the considered minimum irradiation thresholds and, if we take into account only rooftops, the effect of added elements might result either in an overestimation or an underestimation of the annual total irradiation. We conclude by discussing how such findings should influence current practices in the assessment of the solar potential at the urban scale.

Published in:
Proceedings of PLEA 2016, 32th international Conference on Passive and Low Energy Architecture
Presented at:
PLEA2016 Los Angeles - Cities, Buildings, People: Towards Regenerative Environments, Los Angeles, California, USA, July 11-13, 2016

 Record created 2016-04-14, last modified 2018-03-18

Download fulltextPDF
Download fulltextJPG
Rate this document:

Rate this document:
(Not yet reviewed)