Beyond Compliance: Energy Efficient Solutions presentation

Faรงade design strategies that can provide an optimal balance of energy efficiency with occupant comfort and well-being Helen Sanders SAGE Electrochromics, Inc.

The Façade Design Challenge

• •

Too hot?

Too much glare?

Low Energy Consumption

Occupant Thermal & Visual Comfort

•

Too much heat gain/loss?

•

Inadequate solar control?

•

Daylight not harvested?

Daylight & Views

How do you achieve all three goals simultaneously?

How do we prevent this?

Heat and glare can counteract the positive benefits of daylight and views

And this?

And this?

And not not end up with faรงades like this?

Integrated Dynamic Façades Dimmable ligh%ng control Dynamic glare control

Energy efficient fenestra%on § Low u-­‐factor § Dynamic solar control

Effec%ve dayligh%ng design

=> Control systems for fenestration and electric lighting integrated for optimum performance

Impact of lighting controls 7800

Annual Energy Use (Source)

No lighting controls

Expected shape of energy performance in a high performance building

Op8mum window to wall ra8o (WWR) depends on many factors: • Climate zone • Orienta8on • Glass VT, SHGC, u-­‐factor • Depth of daylight zone • Interior design • Dimming control details

With continuously dimming lighting controls 7600

7400

7200

7000

6800

6600

0

10 20 wall 30 Window to ratio

WWR, %

40

50

Most energy efficient design

Pathway to Net Zero Energy Buildings: Integrated Faรงades Annual Energy Usage Over Current Stock, in Quads: -3

Faรงade Technology:

-2

-1

0

Current Building Stock Average Properties of Windows Sold Low-e Dynamic low-e Triple Pane low-e Highly Insulating Dynamic Windows Integrated Insulating Dynamic Faรงades

Data from Arasteh et al., LBNL report number 60049

Heating Cooling Lighting

Highly Glazed Solutions for Sustainable & Elegant Architecture