T. Knapp, A. Wagner*

Building Science Group, University of Karlsruhe, Englerstr. 7, D-76131 Karlsruhe, Germany
* Corresponding Author, wagner@fbta. uni-karlsruhe. de

Abstract

The innovative building services concept realized in the Museum Ritter was designed to reduce the energy consumption of air conditioning and lighting significantly. At the same time, the remaining energy demand is covered mainly by renewable energy. The building is intensely monitored for two years within the research program EnOB (energy-optimized buildings) funded by the German Federal Ministry of Economics and Technology (BMWi). Thereby many data points are measured and the reached specific energy consumption values are compared with the planned values. Further, the operation data of the technical installations are measured to find malfunctions and chances to optimize the performance of single components and the whole system. In the following article a description of the building, the energy concept and the monitoring system is given. Furthermore the interpretation and optimization is shown for the example of the absorption chiller.

Keywords: solar cooling, absorption chiller, monitoring

1. Introduction

The energy consumption of museums is very high in comparison to office or residential buildings. The reasons are the requirements for indoor climate and lighting. On the demand side, savings are only possible to a limited amount. Therefore means must be found to cover the demand in a way that preserves the natural resources. In the Museum Ritter several approaches were realized to attain this goal.

2. The Project

The Museum Ritter is located on the outskirts of the small town Waldenbuch next to the chocolate factory Ritter Sport. It houses an art collection of modern geometric-abstract art. In a conscious analogy the layout of the building is based on geometrically clear forms. The floor plan of the 44 x 44 meter construction, which echoes the square, is divided into two wings. Each of the wings is shaped like a trapeze. They are connected with a passage. The larger wing contains the art collection, changing exhibitions, a shop and a cafe. The smaller one contains the visitor center of the Ritter company: The chocolate shop, the chocolate exhibition and the chocolate workshop for children. In addition, 400 square meter office space for the administration of the factory is placed on the second level of this wing.