Objective
The aim of the project is to demonstrate how an efficient building shell can be combined with innovative passive solar heating, passive cooling and natural daylighting strategies in a "classical" office building type.
The objective of the project is to demonstrate, that the use of electricity for lighting and ventilation can be substantially reduced, and that the need for active cooling of the building can be avoided. This is done via efficient use of natural daylight, efficient solar control and use of passive night cooling of the building structure.
INTEGRATED ENERGY OPTIMIZATION
The most important aspect of the building design is, that the building shell, the heating, ventilation and lighting system, and the control strategy of these installations, has been optimized in one integrated design process, thereby fully exploiting the energy saving potential.
Efficient daylighting utilization in the building is combined with an efficient solar control system of the windows. Electricity load for artificial lighting is decreased, and this in turn leads to an additional reduction in the need for cooling of the building. The small cooling load has then made possible, that passive cooling via night flushing of the heavy concrete building can fully cover the cooling load.
PASSIVE COOLING
The concrete ceiling is via a simple air inlet system cooled at nighttime, when needed, thereby decreasing the temperature of the concrete so much, that overheating during daytime does not occur.
DAYLIGHTING AND EFFICIENT SOLAR CONTROL
The window area is as a total seized to give an optimal balance between penetration of daylighting and passive solar energy, and heat loss. Additionally the window is separated in an upper clerestory window with fixed shading/lighting reflectors, and a lower see-through window with movable solar shading. The use of natural daylighting is enhanced through individual control of articifial lighting combined with a programmed cut-off general office lighting at lunchtime. The lighting can then be manually turned on if required.
EFFICIENT BUILDING SHELL AND HEAT RECUPERATION
The building shell in insulated corresponding to Danish standards, i.e. 100 mm mineral wool in the walls and triple glazing in the windows. The building is facilitated with a ventilation system with heat recuperation and by-pass for summer nigt cooling.
IMPLEMENTATION
The team behind the project reflect the exchange of know-how, experiences and competences between Birka Holding BV in the Netherlands (investor/developer), Esbensen, Consulting Engineers in Denmark (Energy design and optimization), Connova architects Copenhagen/Berlin and Architekturwerksatt Leipzig (Architectural design and implementation).
The project will run through a preliminary design phase, starting in July 1992, detailed design, construction (September 1993 - November 1994) and monitoring and evaluation.
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DEM - Demonstration contractsCoordinator
1112 XR DIEMEN
Germany