Experimental and numerical investigation of thermal improvement of window frames

Gojak, Milan; Kijanovic, I Aleksandar; Rudonja, Nedžad R.; Todorovic, I Ruzica

doi:10.2298/tsci200120189g

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…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%

“…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%. In turn, the authors of the work [34] managed to develop a window solution for which the thermal transmittance coefficient was 8.5% lower compared to a PVC window with a thermal transmittance coefficient of 0.7 W/m 2 K.…”

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%

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

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“…The structural and thermal properties of multilayer building components play a key role not only in hygrothermal and acoustic comfort but also in energy performance of building's envelope [2]. Heat gains and heat losses of buildings mostly depend on the thermal and physical properties of structures and materials [3]. An excellent thermal insulation of thermal storage systems is a prerequisite to reduce heat losses to a minimum [4].…”

Section: Introductionmentioning

confidence: 99%

Verification and validation of an advanced guardedhot plate for determination of thermal conductivity

Mirkovic-Marjanovic¹,

Kijanovic²,

Ilić³

et al. 2022

THERM SCI

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The Guarded hot plate method (GHP) is a widely used technique to measure thermal conductivity of thermal insulation specimens in steady-state conditions. In this paper, an advance of GHP has been developed in the Laboratory for Thermal technique and fire protection in Institute IMS. The innovative GHP has been applied for measuring thermal conductivity using additional heat flux meters. The design of this GHP is similar to the design of the plate for GHP apparatus; however, it has different design: smaller width of thermal barrier, which is filled with insulation glue. Heaters inside hot and guard plates are built from wire for thermocouples, which is a unique type of heater. Geometry of heater has been optimized inside plates to achieve uniform temperature distribution along the specimen surface. Temperature uniformity of guarded hot plate and energy balance were experimentally determined. The verification and validation results of improved GHP have been shown. The test method was validated comparing test results of thermal conductivity with results of the round-robin test. Four national companies participated in the round-robin comparison on thermal conductivity measurement by guarded hot plate method. The measurement was performed on the same specimen of thermal insulation material (expanded polystyrene) according to SRPS EN 12667 at temperatures ranging between 10?C-40?C. The measured thermal conductivity of all participants in the round-robin test was input data for statistical processing according to SRPS ISO 5725-2 and ISO 13528. To evaluate the performance of the participants, the ?z? score has been used. Measurements were conducted successively for all participants. Since 2020, the Accreditation Body of Serbia also approved this test method.

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Experimental and numerical investigation of thermal improvement of window frames

Cited by 2 publications

References 4 publications

Experimental and Numerical Characterizataion of Thermal Bridges in Windows

Experimental and Numerical Characterizataion of Thermal Bridges in Windows

Verification and validation of an advanced guardedhot plate for determination of thermal conductivity

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