1 / 10

Residential Window Energy Use

Residential Window Energy Use Residential Heating Energy Use of Windows is about 2 Quads / year Total energy consumption in US is about 100 Quads / year All Energy Star windows, still 1 Quad Goal: Zero Energy Windows Performance Goals Heating Climates:

Ava
Télécharger la présentation

Residential Window Energy Use

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Residential Window Energy Use • Residential Heating Energy Use of Windows is about 2 Quads / year • Total energy consumption in US is about 100 Quads / year • All Energy Star windows, still 1 Quad • Goal: Zero Energy Windows

  2. Performance Goals Heating Climates: - static high solar, hi-R (U=0.1 Btu/h-ft2-F) can meet ZEH goals - dynamic solar gain (.6<SHGC<.15) and U<.2 also meet ZEH goals

  3. Heat Transfer in Windows Low-e coatings Radiation Conduction Special gas fills Multiple cavities Convection Low conductance spacers Better frames Conduction

  4. low-e low-e 2 sealed gas gaps at different temperatures and pressures thin glass or plastic held by spacer with standard glass, unit is thicker and heavier spacer only 2 paths for gas loss Background • Vacuum windows, aerogels high-risk strategies • Current technologies for highly insulating products use multiple layers of low-e and gas fill • All glass is heavy • Thin film products expensive • Multiple spacers can lead to gas leakage • Market share is low (<1%) • This research aims to develop lower-cost, non-structural center layers • Utilize available low-e and gas-fill technologies • Research novel center layer designs and materials

  5. Prototypes • Utilize available low-e and gas-fill technologies • Research novel center layer designs and materials • Develop interests from industry partners who would supply new components Bent edge insert prototype

  6. Alternative Designs Acrylic in Groove Spec 6 Angled Acrylic Spec 7 Two Layer Teflon Spec 8 One Layer Teflon Spec 13, 16

  7. Alternative Designs Screen Insert Spec 9,15 Acrylic Insert on standoffs Spec 10, 17 Partial Triple Spec 11

  8. Results Simple insert performs as well as fixed layer

  9. Angular Selective Center Layers High Angle summer sun blocked Low Angle winter sun admitted

  10. Conclusions to Date • Possible to get very close to “net zero energy windows” • Climate based • No single, ideal, cost-effective window • Performance potentials of various insert materials studied • High-performance frames still necessary Picture of a zh

More Related