Experimental and numerical investigation of the thermal transmittance of PVC window frames with silica aerogel

Berardi, Umberto; Kisilewicz, Tomasz; Kim, Sumin; Lechowska, Agnieszka; Paulos, Jason; Schnotale, Jacek

doi:10.1016/j.jobe.2020.101665

Cited by 14 publications

(9 citation statements)

References 24 publications

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“…The thermal transmittance coefficient of the window joinery is still much higher than for external walls [15,20,21] which is the syntax for actions to reduce it [22,23,24] and it is also forced by the legal requirements related to the tightening of formal energy efficiency standards in buildings [25,26].…”

Section: Experimental and Numerical Characterization Of Thermal Bridg...mentioning

confidence: 99%

“…Therefore, additional insulation of the PVC frame was used. There have been many studies that focused on the influence of various window frame insulating materials [22,24,32] on the thermal characteristics of windows [33,34,35]. It has been shown in [35] that the use of polyurethane foam placed in large air cavities of PVC window frames can reduce the heat transfer coefficient by 10%.…”

Section: Experimental and Numerical Characterization Of Thermal Bridg...mentioning

confidence: 99%

“…In the work [24] it was found that filling the air cavities of window frames with polyurethane foam can reduce the thermal transmittance coefficient of the frame by about 27%. The authors of the works [21,22] used aerogel to fill recesses in the hollow profiles of PVC windows. The research [21,22] shows that filling the hollow spaces (airfilled PVC cavities) in window frames with aerogel granules can reduce the thermal transmittance coefficient of the frame by up to 30%, depending on the frame's structure.…”

Section: Experimental and Numerical Characterization Of Thermal Bridg...mentioning

confidence: 99%

“…The authors of the works [21,22] used aerogel to fill recesses in the hollow profiles of PVC windows. The research [21,22] shows that filling the hollow spaces (airfilled PVC cavities) in window frames with aerogel granules can reduce the thermal transmittance coefficient of the frame by up to 30%, depending on the frame's structure. However, the work presented above did not analyse the effect of closed stiffening profiles on the thermal characteristics of windows.…”

Section: Experimental and Numerical Characterization Of Thermal Bridg...mentioning

confidence: 99%

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Experimental and Numerical Characterizataion of Thermal Bridges in Windows

Smusz¹,

Bałon²,

Kiełbasa³

et al. 2023

Adv. Sci. Technol. Res. J.

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Actions aimed at improving the energy performance of buildings increase the share of heat loss through thermal bridges and windows in a building's energy balance. This is especially true of buildings currently under construction. In addition, it is known that the correct installation of windows is one of the biggest obstacles that must be overcome in order to achieve higher energy efficiency and reduce the impact of linear thermal bridges. Therefore, the study analysed, numerically and experimentally, the energy properties of PVC window frames with improved metal stiffening profiles, which were introduced to reduce the risk of window frame deformation and reduce leakage caused by faulty installation. The value of the frame thermal transmittance coefficient and the linear heat transfer coefficients were determined numerically. The simulation results showed that filling large air spaces with insulation material allowed for the reduction of the U f frame's thermal transmittance coefficient by over 10%. Moreover, where the window connects with the wall, there was a reduction in the linear thermal bridges' influence on heat losses. The reduction in the linear thermal transmittance coefficient Ψ was 9.6%, 1.0%, and 3.5% for the window sill, jamb, and lintel, respectively, compared to a frame without insulation. Moreover, experimental studies were conducted on the influence of the insulation of the PVC window frame with metal closed stiffening profiles on the linear thermal bridge located at the joint with the glass. It was found that the incidence factor I tb decreased by more than 6%. Thus, there is also a positive effect on the linear thermal bridge at the joint of the glass pane with the window frame.

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Section: Experimental and Numerical Characterization Of Thermal Bridg...mentioning

confidence: 99%

Section: Experimental and Numerical Characterization Of Thermal Bridg...mentioning

confidence: 99%

Section: Experimental and Numerical Characterization Of Thermal Bridg...mentioning

confidence: 99%

Section: Experimental and Numerical Characterization Of Thermal Bridg...mentioning

confidence: 99%

See 2 more Smart Citations

Experimental and Numerical Characterizataion of Thermal Bridges in Windows

Smusz¹,

Bałon²,

Kiełbasa³

et al. 2023

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

show abstract

“…With this, thermal transmittance can be decreased by 30% [21]. Thermal transmittance of the frame can be reduced to 0.8 W m −2 K −1 by filling the cavity with aerogel granules [22]. A greenhouse gas emission comparison for the room with the argon-glazed window and aerogel-glazed window was compared by Nicola et al [23].…”

Section: Introductionmentioning

confidence: 99%

Experimental and CFD Investigation on the Application for Aerogel Insulation in Buildings

et al. 2021

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Reducing building energy consumption is a significant challenge and is one of the most important research areas worldwide. Insulation will help to keep the building’s desired temperature by reducing the heat flow. Additionally, proper insulation can provide an extended period of comfort, leading to reduced building energy requirements. Encapsulated air is the major aspect of most thermal insulation materials. Low thermal conductivity is a good characteristic of thermal insulation materials. Aerogel has low thermal conductivity, so it is suitable for glazing and insulation purposes. This research paper investigates the effectiveness of aerogel as an insulation material in buildings by incorporating a translucent aerogel-glazing system in the window and aerogel insulation in the wall of a building. Experimental investigation of a 10 mm thick aerogel blanket surrounded box was conducted to assess its performance. Additionally, a CFD simulation was conducted, and the results of temperature degradation for the wall showed good agreement with experimental results. Additionally, the CFD simulation of temperature decay was compared between the aerogel-glazed window and argon-glazed window. It was found that the aerogel-glazed window has slower temperature decay compared to the argon-glazed window. The results showed that integrating aerogel in the glazing system and wall insulation in a building has the potential to reduce the building’s energy consumption. Moreover, a numeric simulation was conducted, and showed that the building’s annual energy consumption is reduced by 6% with the use of aerogel insulation compared to fiberglass.

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