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ENERGY ACTIVE CURTAIN WALLING FACADES

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traditional building envelope

heat loss, heat gain, lighting, protection

energy generator with HVAC functions

and advanced shading

multifunctional, prefabricated elements (curtain walling modules)

energy active facade module, autonomous facade module

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prismatic glazing

integrated into triple glazing

PVT collector

integrated into opaque facade

total reflection for solar altitude 40° production of electricity and heat

from same area

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testing of prismatic triple glazing confirmed theoretical potential

sharp decrease in solar transmittance around 40°

selective transmission (winter, summer)

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energy active facade module solar transmission monitoring

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prismatic glazing PVT collectors

▪ reduction of heat gain compared

to conventional triple glazing

▪ winter: 2- 8 %

▪ summer: 39 to 46 %

▪ savings potential

▪ 22 % cooling energy (compared

to clear triple glazing)

▪ 25 % heating energy (compared

to solar protection triple glazing)

▪ increase in production from same

envelope area compared to

combination of conventional

technologies

▪ heat : 35 %

▪ electricity: 39 %

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▪ increasing interest in multifunctional facades

▪ price as a main barrier

▪ prismatic glazings

▪ natural diffuse lighting without sharp shadows

▪ passive solar protection without moving elements

▪ potential for savings compared to conventional glazings (heating, cooling)

▪ glazed PVT collectors

▪ combined heat and power from same area

▪ 5-40 % higher energy gain

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autonomous facade module

▪ Peltier cooler (600 W)

▪ photovoltaics 0,9 kWp

▪ flat battery pack 3,1 kWh

▪ solar protection (blinds)

▪ artificial LED lighting

▪ controller

research on potential level of self-sufficiency in energy supply for typical office behind facade

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Research and development supported by TACR (programme ALFA and EPSILON)

tomas.matuska@cvut.cz