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Title:
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Monitoring en evaluatie gebouw 40. Ontwerp versus praktijk
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Author(s):
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Published by:
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Publication date:
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ECN
Energy in the Built Environment
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1-12-2002
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ECN report number:
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Document type:
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ECN-C--03-005
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ECN publication
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Number of pages:
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Full text:
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29
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Download PDF
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Abstract:
In 1993 ECN started to build one of the most energy-efficient officeof those days. The design meets the ISSO/SBR-directive for energy efficient
offices. The central aim of the project is: As low energy consumption
as possible needed for lighting, heating and ventilation in relation
to the costs and comfort.
In this rapport the measures to reduce the energy consumption in the
building are being evaluated. There are two questions to be answered:
- Examine if the measures to reduce the energy consumption have succeeded.
- Examine what is to be learnt for the design, construction and management
of low-energy buildings.
In the design stage a number of innovative measures were introduced.
During the project the orginal design has been altered due to financial
exceedings. In this rapport it is examined what the actual situation
is for comfort and reduction of energy consumption and also some positive
suggestions are made. Heating and ventilation are the largest consumers
of electricity (40%).
The target for energy consumption was 85 MJ/m3. Due to the alterations
in de buildingphase it has become 106 MJ/m3. This actual energy consumption
is still more than twice as low as the minimum requirements for energy
consumption in 1993 viz. 250 MJ/m3. Therefore the building may still
be called a very energy-efficient office, especially for those days.
The goals for comfort have not all been met. The third floor of the
west- and southfacade doesn't remain within the ISSO/SBR-directive requirements
for overheating, they have too many exceedance hours. In the winter
season the relative humidity lies between 20-30%, which is beneath the
ISSO/SBR-directive of minimal 30%. The changes made during the building-period
are a main cause for these comfort deviations.
Evaluation of the building learns that sufficient flexibility in the
time planning and budget should be taken into account to implement new
applications of renewable energy. A general suggestion to reduce the
energy use during the exploitation fase of the building: Carefully consider
the effects both to energy and comfort when changes are made in the
energy concept.
To succeed in a high energy-efficient office monitoring and feedback
to the users of the building are important tools.
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