Master's Thesis Stefan Schlosser

 

*** Einfluss der Zonierung auf die dynamische Simulation von Büro- und Laborgebäuden ***

Improving the energy efficiency of buildings is one of the key levers to reduce energy consumption. To apply the available efficiency measures effectively, a quick and suf-ficiently exact energetic assessment of the respective buildings is required.
This work examines the impact of various approaches to defining and simplifying the zonal structure of buildings on the quality of results of a dynamic simulation of the energetic behavior of a building. It firstly describes all steps necessary to capture all aspects of the building physics relevant for the simulation. Based on this it develops a framework of four levers to simplify the definition of zonal structures and classifies already existing simplification approaches within this framework. To conduct the ac-tual analyses, this work selects those approaches relevant, defines various alterna-tives for the zonal structure of the two example buildings and performs the respective simulations. Consequently it compares the resulting heat energy demand for all zon-ing alternatives.
The results of this work are threefold. Firstly it develops a framework of four levers for the simplification of the definition of zonal structures, which allows classifying already existing approaches. Secondly it develops a set of software tools based on MS-Excel to support capturing and documentation of the relevant elements of the building phys-ics. These tools significantly improve the speed of the overall simulation process. Thirdly this work derives a set of findings from its analyses. A zonal structure based on the prevalent norm yields the lowest deviation from the reference (one zone per room) for the example buildings used. They are below 1% for one building and ap-proximately 3.5% for the other one. All other zoning alternatives result in significantly higher deviations compared to the reference, while the differences between the re-sults for these zoning alternatives are comparably small. Finally this thesis shows that the air exchange rates used as a parameter input for the model are one key fac-tor in explaining these results.