Paper 1
Monitoring Results of a Naturally
Ventilated and Passively Cooled Office
Building
in
Frankfurt
,
Germany
Andreas
Wagner1, Michael Klebe1 and Christopher Parker2
1Division
of Building Science,
University
of
Karlsruhe
, Englerstr.7, 76131
Karlsruhe
,
Germany
2Student
at
Purdue
University
who worked for this study at the
University
of
Karlsruhe
as a research scholar
Abstract
Ventilation, cooling and air-conditioning contribute significantly to
the energy consumption of many existing office buildings, particularly
when primary energy factors are taken into account. “Lean” building
concepts however can diminish this energy consumption by natural
ventilation and passive cooling strategies. Compared to fully
air-conditioned buildings the resulting indoor temperatures float in a
broader band during summer and might exceed the boundaries for thermal
comfort for short periods. This paper presents the monitoring results of a
naturally ventilated and passively cooled bank building in
Germany
and shows that, even during the very hot summer of 2003, the indoor
climate could be held in an acceptable range by only passive means if the
rooms were operated properly. The air quality was shown to be high with
natural ventilation. Investigations on the night ventilation strategy
revealed an incorrect implementation of design
parameters in the building management system. Further optimization
potential for nocturnal airflow was found by simulations based on recorded
data. The low total primary energy consumption for heating, cooling,
ventilation and lighting of 115 kWh m-2a-1
confirmed an excellent performance of the building. Monitoring proved to
be a necessary and efficient way to optimize the building’s operation.
Key words: natural
ventilation, passive cooling, night ventilation, energy efficiency,
thermal comfort, indoor air quality, monitoring, case study.
References
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Parker C: (2006): Passive cooling through night ventilation: KfW
Ostarkade. Thesis submitted to
University
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Karlsruhe
and
Purdue
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.
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