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EVA - Evaluation of Energy Concepts: Case Study of Siedlungswerk, Stuttgart
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This paper presents the evaluation and optimization results of the office building Siedlungswerk as part of the EVA project. Within EVA, 19 German office buildings are being “eva”-luated in terms of energy efficiency and user comfort. Built in the early 1990s in the city center of Stuttgart the building Siedlungswerk provides office spaces for 135 employees on a net heated floor area without a parking garage (NGFr) of 5.589 m². The evaluation showed an annual consumption of primary energy of 614 kWh/(m²NGFra). This was the highest within the EVA sample and significantly above reference values. Users complained about high temperatures in summer and low temperatures in winter especially during the morning hours. A short term monitoring of the indoor climate confirmed these problems. A comprehensive concept of improvement was implemented at the end of 2004 at a total cost of 250 T including 100 T for improvements in energy efficiency. The following year showed a reduction of 36 % in consumption of electrical energy and 49% in gas consumption. The energy savings generate annual cost savings of 50 T, which equals a return on invest in energy efficiency after two years. The optimized building operation also significantly improved the user comfort.
Stefan, P.; Mahler, B.; Fisch, M. N. (2006). EVA - Evaluation of Energy Concepts: Case Study of Siedlungswerk, Stuttgart. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from