Transparent evacuated insulation

Collins, R.E.; Fischer-Cripps, Anthony C.; Tang, Jieying

doi:10.1016/0038-092x(92)90106-k

Cited by 63 publications

(28 citation statements)

References 13 publications

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“…A comprehensive analysis of the heat transfer through the support legs has been made by Collins et al [7,8]. In their works, thermal resistance of support leg for a cylindrical glass support leg of diameter d and height d may be written as…”

Section: Conduction Through the Support Legsmentioning

confidence: 99%

“…Spinnler et al [1,2], Scurlock and Saull [3], Krishnaprakas et al [4] and Jacob et al [5] investigate theoretical or experimental study to design the multi-layer thermal insulation systems by using spacer (such as micro porous media and aluminum foil). Collins et al [6][7][8] have practically developed single layer double pair vacuum insulation panels (VIP) using tiny support crystals. Still, their thermal insulation systems have a fairly large gap size and they do not have to consider the wave interference or tunneling effect by the evanescent wave which comes into play when the gap size is further reduced.…”

Section: Introductionmentioning

confidence: 99%

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Development of a multiple layer vacuum insulation chip

Yoon

Song

2009

International Journal of Heat and Mass Transfer

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Section: Conduction Through the Support Legsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of a multiple layer vacuum insulation chip

Yoon

Song

2009

International Journal of Heat and Mass Transfer

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“…By applying low-emission coatings, the heat loss caused by radiation can also be reduced. This glazing system can achieve a nominal U-value as low as 0.1 W/m 2 K [3][4][5]. However, relatively high fabrication costs and short lifetime have hindered the use of VGUs in the commercial sector [6].…”

Section: Introductionmentioning

confidence: 99%

Novel hybrid vacuum/triple glazing units with pressure equalisation design

Bao

Liu

Yang

et al. 2014

Construction and Building Materials

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h i g h l i g h t sA novel development of a hybrid vacuum/triple glazing system with a pressure equalisation design is reported. Negative pressure test was undertaken to examine the stresses and deformation generated in the new system. The maximum stresses and deflections were significantly reduced compared to the conventional design. This novel glazing system is safer than conventional vacuum glazing units. a b s t r a c tVacuum glazing units (VGUs) are thought to be a type of glazing system with superior effective insulation performance. However, the differential pressure between the outside and the inner spaces and the supporting pillars create a high pre-existing stress field in the constituent glass during fabrication and hence make the units highly susceptible to breakage, even under small applied loads. In order to address this problem, a novel hybrid vacuum/triple glazing system with a pressure equalisation design has been devised and is reported in this paper. In this system, a VGU is enclosed by two glass panels to form a triple glazing unit system. This new design creates an equalised air pressure on both sides of the VGU hence subjects the VGU to no additional loads apart from the inherent fabrication stresses. This results in a high thermal and sound insulation as well as a more durable safety performance of the hybrid glazing component. Pressure tests were undertaken on the novel glazing system to confirm its reliability. Results show that under various loading levels, the stresses and deflections in the VGU of this novel glazing system always remain at a marginal level, and hence the likelihood of breakage for VGUs can be reduced significantly.

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“…In this regard, improving the thermal insulation level of windows has without doubt been an important research topic. Many window innovations, such as multilayered windows [3][4][5][6], vacuum windows [7][8][9][10], and aerogel windows [11][12][13][14][15][16][17][18][19], have been under rapid development in recent years. So far, highly insulating windows with U values of about 0.5-0.7 W/(m 2 K) are commercially available and new products with even better performance are emerging on the market [2].…”

Section: Introductionmentioning

confidence: 99%

Lightweight and thermally insulating aerogel glass materials

et al. 2014

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Glass represents an important and widely used building material, and crucial aspects to be addressed include thermal conductivity, visible light transmittance, and weight for windows with improved energy efficiency. In this work, by sintering monolithic silica aerogel precursors at elevated temperatures, aerogel glass materials were successfully prepared, which were characterized by low thermal conductivity [k & 0.17-0.18 W/(mK)], high visible transparency (T vis & 91-96 % at 500 nm), low density (q & 1.60-1.79 g/cm 3 ), and enhanced mechanical strength (typical elastic modulus E r & 2.0-6.4 GPa). These improved properties were derived from a series of successive gelation and aging steps during the desiccation of silica aerogels. The involved sol ? gel ? glass transformation was investigated by means of thermo-gravimetric analysis, scanning electron microscopy, nanoindentation, and Fourier transform infrared spectroscopy. Strategies of improving further the mechanical strength of the obtained aerogel glass materials are also discussed.

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Transparent evacuated insulation

Cited by 63 publications

References 13 publications

Development of a multiple layer vacuum insulation chip

Development of a multiple layer vacuum insulation chip

Novel hybrid vacuum/triple glazing units with pressure equalisation design

Lightweight and thermally insulating aerogel glass materials

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