D2.2: Validation Results of the models

This report is a documentation of how validation of the models for buildings and systems was performed within the PEBBLE project. It is organized in three main sections, one for each building (FIBP Kassel, RWTH Aachen and TUC Chania).

The sections for the FIBP and TUC building are structured in the following way: First, a compendium of the differences between the physical and the modeled building are given, discussing the reasons for the differences and their expected effect on the simulation results. Simplifications in the transition from the physical to the modeled building (which is partly originated from the simulation tool and partly chosen by the one building the model), and also uncertainties of model inputs that are not exactly known, such as internal gains (occupation) cause differences between the measured and the simulated behavior of the building. Recommendations for possible improvements of the model are given in this section. Subsequently, the method of validation employed and the prerequisites applied are explained. Temperatures are the most common quantities to validate in building simulation; however, other quantities such as heat demand are also a measure for the validity of the model. The results from the validation tasks are shown and discussed as well as conclusions are drawn.

The sections for the RWTH building is structured differently because of the circumstances: The construction is not finished yet (scheduled move-in in September 2011), hence no measured values are available yet. Additionally, new models for the building simulation in Dymola had to be developed which are not officially validated yet (as e.g. for TRNSYS and EnergyPlus). Thus, for the RWTH building validation has to be performed in a different way, which is described in the respective section: on one hand, ASHRAE standard 140-2007 is used to evaluate the heating and cooling demand, and on the other hand measured data from single components is compared to simulation results.


Dissemination Level: Restricted