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Passive gains versus cooling requirements

 

Leader

 

AEE - Institute for Sustainable Technologies (AEE INTEC)
Authors

Armin Knotzer (project leader)

 

Solutions for protection from overheating and glare

As there are very low thermal loads in high performance renovated buildings the importance of the heating demand shifts towards the cooling demand of the buildings, in particular of school buildings. During schoolventcool measures like “intelligent” blinds and control systems will be analysed and focused to three solutions. These measures go together with easy ventilation solutions.

The existing school building stock is mostly equipped with big window areas without thermal and shading standards. High performance renovation  leads to well insulated and airtight building envelope. Therefore it is crucial to investigate the thermal dynamics of (class)rooms concerning the influence and effects of the following two parameters:

1. Passive gains: Thermal performance (g-value, U-value), area and orientation of the windows; number of pupils, duration and activity of schoolwork (amount of internal gains), etc.

2. Cooling requirements: External shadowing like blinds (with or without daylight use, protection from glare), external insulation (U-values), heat storage mass, ventilation rate, etc.

Calculations, measurements and evaluations will show the influence of these parameters on the loads and comfort of classrooms. Study investigations and qualitative interviews of teachers and pupils support the results.

 

Publications

- Pupils video "SchülerInnenprojekt schoolventcool"

- Presentation "Belichtung Sonnenschutz Blendschutz" in German. 

- Paper "Thermal comfort analyses in classrooms"