English

This paper presents a high-level overview of a methodology for analysing window shade use in existing buildings. Time-lapse photography is paired with a robust image recognition algorithm to facilitate assessment of shade use and identify any possible trends. The methodology applied on a high-rise building consisting of multiple open plan offices. The analysis showed that the mean shade occlusion and the shade movement rate depend on façade orientation, with the near-south façade having the highest values and the near-north façade having the lowest ones.

Domestic heating systems often work with too high supply temperatures. This means that heat genera-tors and especially heat pumps work with a lower effi-ciency than possible.
The influence of the supply temperature on the effi-ciency of an air-to-water heat pump is discussed. An adaptive supply temperature control is presented that operates according to the heat load of the building whereas information of electronic thermostatic valve heads are used.

Traditional building simulation tools have achieved considerable success in the past. They provide the essential foundation for modeling highly sophisti-cated tasks. Nevertheless, new challenges and cur-rent progress in the energy domain require rapid pro-totyping capabilities for just-in-time model-based in-vestigation. Supporting these requirements is one of the many advantages of employing modern univer-sal modeling languages. This work addresses the in-tegration of the modern modeling language Model-ica with the traditional simulation tool TRNSYS.

To design and evaluate advanced controls for build-ings , building system models that can show detailed dynamics of feedback control loops are required. The models should also be computationally efficient if they are used for model-based control in real time. How-ever, most building energy simulation programs apply idealized feedback control and steady-state model for HVAC equipment.