Evacuated aerogel glazings

Schultz, Jørgen Munthe; Jensen, Karsten Ingerslev

doi:10.1016/j.vacuum.2007.10.019

Cited by 118 publications

(74 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Sekisui in Japan (Sekisui 2007(Sekisui , 2010 currently have a product available called the 'air sandwich' as depicted in Fig.7. It consists of a number (which can be chosen) of thin plastic films with plastic spacers with air 'sandwiched' between for insulation.…”

Section: Air Sandwichmentioning

confidence: 99%

“…4, 10 and 100 mm) is shown as the three coloured lines each with a optimum point for the lowest U-value, whereas T vis (note that T vis increases downwards on the y-axis) is shown as the black graph increasing with a decreasing number of layers. Sekisui (2007) gives an example of an air sandwich with 5 air layers and a total width of only 4 mm with an U-value of 3.4 W/(m 2 K) and a T vis of 0.60. Another example from Sekisui (2007) is 7 air layers and a total width of 12 mm with an U-value of 1.8 W/(m 2 K) and a T vis of 0.55.…”

Section: Air Sandwichmentioning

confidence: 99%

“…Figure 10 shows a picture of aerogel granules in an Okalux product. Monolithic silica aerogels can help to improve the T vis and transparent performance of aerogel glazing if they are produced as one complete tile, although there are still issues with preventing cracking when drying the aerogel (Duer and Svendsen 1998, Rigacci et al 1998, Schultz and Jensen 2008. Currently, the maximum size of a crack-free monolithic aerogel tile is 0.58 m x 0.58 m, limited by the size of the autoclave (Schultz and Jensen 2008), where the thickness could be varied freely (in the actual projects it was 15 mm).…”

Section: Monolithic Silica Aerogelmentioning

confidence: 99%

Section: Evacuated Aerogel Glazingmentioning

confidence: 99%

“…Schultz and Jensen (2008) report to lower the thermal conductivity from 0.017 W/(mK) at atmospheric pressure to approximately 0.010 W/(mK) by evacuating the aerogel to a rough vacuum in the range 10-50 hPa. The glazing protypes had a measured U g -value of 0.66 W/(m 2 K) and a total solar energy transmittance of 76-80 % (Schultz and Jensen 2008). Furthermore, Schultz and Jensen (2008) claim through calculations that an aerogel glazing with 20 mm glass distance can reach an U g -value below 0.5 W/(m 2 K) combined with a total solar energy transmittance (solar factor) above 75 %.…”

Section: Evacuated Aerogel Glazingmentioning

confidence: 99%

See 4 more Smart Citations

Fenestration of today and tomorrow: A state-of-the-art review and future research opportunities

Jelle

Hynd

Gustavsen

et al. 2012

Solar Energy Materials and Solar Cells

468

216

View full text Add to dashboard Cite

Fenestration of today is continuously being developed into the fenestration of tomorrow, hence offering a steadily increase of daylight and solar energy utilization and control, and at the same time providing a necessary climate screen with a satisfactory thermal comfort. Within this work a state-of-the-art market review of the best performing fenestration products has been carried out, along with an overview of possible future research opportunities for the fenestration industry. The focus of the market review was low thermal transmittance (Uvalue). The lowest centre-of-glass U g -values found was 0.28 W/(m 2 K) and 0.30 W/(m 2 K), which was from a suspended coating glazing product and an aerogel glazing product, respectively. However, the majority of high performance products found were triple glazed. The lowest frame U-value was 0.61 W/(m 2 K). Vacuum glazing, smart windows, solar cell glazing, window frames, self-cleaning glazing, low-emissivity coatings and spacers were also reviewed, thus also representing possibilities for controlling and harvesting the solar radiation energy. Currently, vacuum glazing, new spacer materials and solutions, electrochromic windows and aerogel glazing seem to have the largest potential for improving the thermal performance and daylight and solar properties in fenestration products. Aerogel glazing has the lowest potential U-values, ~ 0.1 W/(m 2 K), but requires further work to improve the visible transmittance. Electrochromic vaccum glazing and evacuated aerogel glazing are two vacuum related solutions which have a large potential. There may also be opportunities for completely new material innovations which could revolutionize the fenestration industry.

show abstract

Section: Air Sandwichmentioning

confidence: 99%

Section: Air Sandwichmentioning

confidence: 99%