Comparison between ASHRAE and ISO thermal transmittance calculation methods

Blanusa, Petar; Goss, W. P.; Roth, H.; Weitzmannn, Peter; Jensen, Claus F.; Svendsen, Svend; Elmahdy, Hakim

doi:10.1016/j.enbuild.2006.09.007

Cited by 29 publications

(21 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…visible solar transmittance (T vis ), solar transmittance (T sol ), ultraviolet solar transmittance (T uv ), solar reflectance (R sol ), solar factor (SF), solar material protection factor (SMPF) and solar skin protection factor (SSPF), may be found in and Jelle and Gustavsen (2010a). When calculating U-values the method used must be noted as there can be up to a 3 % difference between the North American (ASHRAE) and European (ISO) methods (Blanusa et al 2007). For further information on thermal transmittance values and their calculation see works by , Gustavsen et al (2008) and Blanusa et al (2007).…”

Section: Introductionmentioning

confidence: 99%

“…When calculating U-values the method used must be noted as there can be up to a 3 % difference between the North American (ASHRAE) and European (ISO) methods (Blanusa et al 2007). For further information on thermal transmittance values and their calculation see works by , Gustavsen et al (2008) and Blanusa et al (2007). Earlier review works on advanced glazing technology (Lampert and Ma 1992), advances in window technology (Arasteh 1994) and zero energy windows (Arasteh et al 2006) are noted.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

466

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

466

216

View full text Add to dashboard Cite

show abstract

“…(6), that is ISO 10077-2. Blanusa et al (2007) compare the ISO and ASHRAE procedures and find that the two procedures give U-values that differ both for the frame and the entire window product. The difference is largest for small windows.…”

Section: Thermal Transmittance (U-value)mentioning

confidence: 99%

State-of-the-Art Highly Insulating Window Frames - Research and Market Review

Gustavsen¹,

Jelle²,

Arasteh³

et al. 2007

View full text Add to dashboard Cite

Summary This document reports the findings of a market and research review related to state-of-the-art highly insulating window frames. The market review focuses on window frames that satisfy the area to a minimum, which is done by focusing on the net energy gain by the entire window (frame, spacer and glazing). Literature shows that a window with a higher U-value may give a net energy gain to a building that is higher than a window with a smaller U-value. The net energy gain is calculated by subtracting the transmission losses through the window from the

show abstract

“…In [7] two different twodimensional frame/spacer heat transfer calculation methodologies used in North America and in Europe were compared. The [8] shows algebraically that the differences between the ISO and ASHRAE methods turn out to be due to the way the corner regions of the window frame and glazing are treated for the evaluation of the thermal transmittance by two-dimensional calculations.…”

Section: Introductionmentioning

confidence: 99%

Life cycle assessment of italian residential windows: sensitivity of analysis

Intini¹,

Rospi²,

Cardinale³

et al. 2016

IJHT

View full text Add to dashboard Cite

Product Sustainability assessment is becoming ever more critical in the global competition; this is particularly true for building sector. This paper faces the problem of the analysis of sensitivity of this task by referring to a Life Cycle Assessment (LCA) case of a PVC window for civil buildings applications. Sensitivity has been appreciated by referring to two functional units to evaluate the quality of the environmental impacts by relating it to the window features: per piece and per square meter of see-through surface. It resulted that the sustainability impact calculated per square meter changes considerably with the change of the type of window. This sensitivity analysis leads to propose a new criterion of the analysis to provide a reliable assessment approach to be used for the evaluation of the environmental performance of products. The difference between the values of thermal transmittance measured and calculated is inferior to 5%, which it is an absolutely optimal value.

show abstract

Comparison between ASHRAE and ISO thermal transmittance calculation methods

Cited by 29 publications

References 0 publications

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

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

State-of-the-Art Highly Insulating Window Frames - Research and Market Review

Life cycle assessment of italian residential windows: sensitivity of analysis

Contact Info

Product

Resources

About