A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Energy balance of windows
Efficient passive heating by solar energy can only be achieved by a specific design of windows. The climate in central and northern Europe requires windows with maximum transmission of solar radiation and minimum heat loss. After a detailed theoretical and experimental study on the influence of solar and thermal radiation on the energy consumption of buildings we have focused our attention to the energy performance of conventional and advanced multiple-glazed windows in relation to the spectral properties of the glass panes, solar and infrared radiation as well as convection. The considered multiple-glazed windows also contain glasses with selective thin-film coatings which reduce the radiative exchange between the glazing layers. The authors investigations include a computer model on radiation and heat transfer through windows, laboratory spectroscopy of glass panes and windows in the visible, infrared and ultraviolet, and in-situ measurements on windows on a test cabin at EMPA Duebendorf, CH. On this occasion they determine the ssrface temperatures of the glazings with thermoelements and infrared radioneters in correlation with environmental parameters, e.g. ambient air temperatures, wind speeds on roof and on glazings, solar and infrared radiation. The aims of the study are to gain a detailed knowledge of the physical phenomena and the energy transfer occuring at glazings, and to provide the basis for improvement and standardization of windows.
Energy balance of windows
Efficient passive heating by solar energy can only be achieved by a specific design of windows. The climate in central and northern Europe requires windows with maximum transmission of solar radiation and minimum heat loss. After a detailed theoretical and experimental study on the influence of solar and thermal radiation on the energy consumption of buildings we have focused our attention to the energy performance of conventional and advanced multiple-glazed windows in relation to the spectral properties of the glass panes, solar and infrared radiation as well as convection. The considered multiple-glazed windows also contain glasses with selective thin-film coatings which reduce the radiative exchange between the glazing layers. The authors investigations include a computer model on radiation and heat transfer through windows, laboratory spectroscopy of glass panes and windows in the visible, infrared and ultraviolet, and in-situ measurements on windows on a test cabin at EMPA Duebendorf, CH. On this occasion they determine the ssrface temperatures of the glazings with thermoelements and infrared radioneters in correlation with environmental parameters, e.g. ambient air temperatures, wind speeds on roof and on glazings, solar and infrared radiation. The aims of the study are to gain a detailed knowledge of the physical phenomena and the energy transfer occuring at glazings, and to provide the basis for improvement and standardization of windows.
Energy balance of windows
Energiebilanz von Fenstern
Thiebaud, F. (author) / Furler, R. (author) / Kneubuehl, F.K. (author)
1985
3 Seiten, 2 Bilder, 1 Quelle
Conference paper
English
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