Thermal performance of secondary glazing as a retrofit alternative for single-glazed windows

Smith, N.; Isaacs, Nigel; Burgess, John C.; Cox-Smith, Ian

doi:10.1016/j.enbuild.2012.07.038

Cited by 36 publications

(24 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Smith et al [188] used a GHB apparatus to evaluate the thermal performance of secondary glazing as a retrofit alternative for single-glazed windows. The authors evaluated the thermal transmittance of four secondary glazing products: plastic film, magnetically attached plastic sheet, plain and low-e glass.…”

Section: Window Systemsmentioning

confidence: 99%

Laboratory and in-situ non-destructive methods to evaluate the thermal transmittance and behavior of walls, windows, and construction elements with innovative materials: A review

Soares

Martins

Gonçalves

et al. 2019

Energy and Buildings

View full text Add to dashboard Cite

The experimental characterization of the overall thermal transmittance of homogeneous, moderately-and non-homogeneous walls, windows, and construction elements with innovative materials is very important to predict their thermal performance. It is also important to evaluate if the standard calculation methods to estimate the U-value of new and existing walls can be applied to more complex configurations, since the correct estimation of this value is a critical requirement when performing building energy simulations or energy audit. This paper provides a survey on the main methods to measure the thermal transmittance and thermal behaviour of construction elements, considering laboratory conditions and in-situ non-destructive measurements. Five methods are described: the heat flow meter (HFM); the guarded hot plate (GHP); the hot box (HB), considering the guarded HB (GHB) and the calibrated HB (CHB); and the infrared thermography (IRT). Then, previous studies dedicated to the assessment of the thermal performance of different heavy-and light-weight walls are discussed. Particular attention is devoted to the measurement of the U-value of nonhomogeneous walls, including the effect of thermal bridging caused by steel framing or mortar joints, and the presence of PCMs or new insulation materials in the configuration of the walls. hot box; calibrated hot box; infrared thermography. Highlights: -Review on the main methods to measure the U-value of non-homogeneous walls. -Methods: heat flow meter, guarded hot plate, guarded and calibrated hot box, infrared thermography. -Standards framework and discussion of the main advantages and drawbacks of each method. -Description of methodologies and working principles of laboratory and in-situ measurements. -Measurement of the thermal transmittance of different heavy-and light-weight walls.

show abstract

Section: Window Systemsmentioning

confidence: 99%

Laboratory and in-situ non-destructive methods to evaluate the thermal transmittance and behavior of walls, windows, and construction elements with innovative materials: A review

Soares

Martins

Gonçalves

et al. 2019

Energy and Buildings

View full text Add to dashboard Cite

show abstract

“…The published literature found that increasing the airtightness quality determined in the UK building regulation standard of 11.5 m 3 /(m 2 h) to be 5 m 3 /(m 2 h) at 50 Pa may result in a 15% reduction of heat loss [13]. Furthermore, in terms of windows thermal performance, Smith et al [19] reported the performance of four different types of secondary glazing; a plastic film, a plastic sheet, an acrylic sheet, and a low-E glass; applied to a single glazing base window in a guarded hot box. The results have shown a notable thermal performance improvement as can be seen from TABLE .…”

Section: Introductionmentioning

confidence: 99%

Improving Thermal Performance of Dwelling Single Glass Windows Using Secondary Glazing in the UK

Harjunowibowo

Prasetyo

Ahmadi

et al. 2019

Int. J. Adv. Sci. Eng. Inf. Technol.

View full text Add to dashboard Cite

In the globe, 40% of heat losses in domestic buildings were caused by single glazing windows usage and around 20% were due to air infiltration. Therefore, an improvement for the single glazed windows and reducing the air infiltration must be considered to lower the energy consumption. This study aims to investigate the thermal performance of the secondary glazing sheet on the ordinary windows in the low-income dwellers. The PVC sheets were used as the secondary glazing which easies to tailor and fit into the windows frame in the living room. Besides, a commercial foam insulation tape was used to seal the air leakage of the windows. The indoor and outdoor temperatures of a living room, pre-and post-retrofitting, were measured and the U-values were compared based on ISO 9869:2014 standard. It is found that the respective temperature differences between indoor and outdoor at pre-and post-retrofitting were 5.6 °C and 8.6 °C. The post-retrofitting indoor temperature was more stable, with fewer fluctuations compared to the pre-treatment. Furthermore, the U-values were improved by 57% where the number before and after retrofitting found to be 5.71±0.01 W/m 2 K and 3.23±0.01 W/m 2 K, respectively. The utilization of the proposed glazing and diminishing the air infiltration on a single glazing window play the key role in improving the thermal comfort, cheaper than commercial double glazing, eco-friendly, and easy to install.

show abstract

“…Secondary glazing ranges from thin films that are stretched or shrunk across windows to framed glass units. Although the R value of secondary glazed windows can be improved by 130-290% compared to single glazing (Smith et al 2012), these units can be expensive, difficult to install and can restrict the use of the windows.…”

Section: Fabric Losses Through Building Elementsmentioning

confidence: 99%

The thermal performance of window coverings in a whole house test facility with single-glazed sash windows

et al. 2017

View full text Add to dashboard Cite

The residential sector is responsible for 29% of the total energy consumption of the UK, with 62% of this energy being used for space heating. Heat loss through the fabric of building elements is a crucial factor in the energy efficiency of homes, and a wide number of studies have looked at physical interventions to improve the energy efficiency of existing buildings, commonly called retrofit. This research considers the impact of window coverings on reducing heat loss from homes, a measure that is not commonly considered an energy efficiency intervention. Although the amount of glazing varies widely between homes, all windows are a significant factor contributing to heat loss. While physical changes such as double and triple glazing can improve the energy performance of buildings, the impact of curtains and blinds is not well characterised. Previous research into window coverings has been undertaken using laboratory tests, such as hotbox and small climatic chamber environments. This study presents the impact of window coverings on heat loss within a unique whole house test facility. This allows for a better replication of a real heating system and the effects that it has on localised heat transfer. This gives a more detailed picture of in situ performance, similar to that which may be found in the field.

show abstract

Thermal performance of secondary glazing as a retrofit alternative for single-glazed windows

Cited by 36 publications

References 2 publications

Laboratory and in-situ non-destructive methods to evaluate the thermal transmittance and behavior of walls, windows, and construction elements with innovative materials: A review

Laboratory and in-situ non-destructive methods to evaluate the thermal transmittance and behavior of walls, windows, and construction elements with innovative materials: A review

Improving Thermal Performance of Dwelling Single Glass Windows Using Secondary Glazing in the UK

The thermal performance of window coverings in a whole house test facility with single-glazed sash windows

Contact Info

Product

Resources

About