1 Regulation of Natural Light by an Electrical Device - from a 2-Way Switch to Full- Regulation of Natural Light by an Electrical Device - from a 2-Way Switch to Full- Automation. Automation. Light Regulating Light Regulating 1 1 Insulated Glass Insulated Glass Larry Silverberg Larry Silverberg Professor Professor Mech. & Aero. Engineering Mech. & Aero. Engineering NC NC State, Raleigh, NC 27613 State, Raleigh, NC 27613 919 515 5665 919 515 5665 [email protected][email protected]Presentation given to AGC North America Presentation given to AGC North America on 8-24-07 on 8-24-07
Presentation given to AGC North America on 8-24-07. Light Regulating 1 Insulated Glass. Larry Silverberg Professor Mech. & Aero. Engineering NC State, R aleigh, NC 27613 919 515 5665 [email protected]. - PowerPoint PPT Presentation
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11Regulation of Natural Light by an Electrical Device - from a 2-Way Switch to Full-Regulation of Natural Light by an Electrical Device - from a 2-Way Switch to Full-
Presentation given to AGC North America on 8-Presentation given to AGC North America on 8-24-07 24-07
MethodMethod1.1.Venetian blind hangs in insulated glass. Venetian blind hangs in insulated glass. 2.2.An electrostatic switch, when turned on, An electrostatic switch, when turned on, places static electricity on aluminum slats places static electricity on aluminum slats inside the air space.inside the air space.3.3.This induces an opposite charge on the glass This induces an opposite charge on the glass creating an attraction force between the slats creating an attraction force between the slats and the glass that causes the slats to rotate and the glass that causes the slats to rotate toward the glass (open).toward the glass (open).4.4.The electrostatic switch, when turned off, The electrostatic switch, when turned off, removes the static electricity from the slats, removes the static electricity from the slats, which allows the slats to naturally fall (close) which allows the slats to naturally fall (close) by gravity. Electric operation ranges from a by gravity. Electric operation ranges from a simple on-off switch to full automation.simple on-off switch to full automation.
Light Regulation by Electrostatic Means (1-Light Regulation by Electrostatic Means (1-2)2)
PROPERTIESPROPERTIES One electrostatic transformer operates a unit of any size.One electrostatic transformer operates a unit of any size. The number of part types in the air space is 4: slats, ladders, tabs, The number of part types in the air space is 4: slats, ladders, tabs,
and hooks. The slats are the only moving parts.and hooks. The slats are the only moving parts. Electrostatic actuation is electrically capacitive so power consumption Electrostatic actuation is electrically capacitive so power consumption
is on the order of 0.0025$ per square foot per year. is on the order of 0.0025$ per square foot per year. A commercial building with 10,000 square foot of LR-IG windows costs 25$ per year of A commercial building with 10,000 square foot of LR-IG windows costs 25$ per year of operation – comparable to fire detectors & garage door openers. operation – comparable to fire detectors & garage door openers.
The system is standardized for insulated glass.The system is standardized for insulated glass. Other methods are confined to small-scale use because of user costs. Other methods are confined to small-scale use because of user costs. Unique technology that can satisfy industry warrantees. Unique technology that can satisfy industry warrantees.
Light Regulation by Electrostatic Means (2-Light Regulation by Electrostatic Means (2-2)2)
Light Regulating Insulated GlassLight Regulating Insulated Glass– Integrated system of electrically controlled blinds and Integrated system of electrically controlled blinds and
Electro-Chromatic GlassElectro-Chromatic Glass – Glass matrix that changes from clear to opaque. Glass matrix that changes from clear to opaque. – High power consumption, short lifetimeHigh power consumption, short lifetime
Conventional Motorized ShadingConventional Motorized Shading– Motorized systems in windows and doors. Motorized systems in windows and doors. – Currently availableCurrently available– After-market installation. After-market installation. – Can not offer competitive warrantees. Can not offer competitive warrantees.
School Day-Lighting, Entertainment School Day-Lighting, Entertainment RoomsRooms Partitioning SpacePartitioning Space Office ClustersOffice Clusters Safety/SecuritySafety/Security Hospitals, Mental Institutions, Nursing Hospitals, Mental Institutions, Nursing
Homes, Day Care Centers, Young Homes, Day Care Centers, Young Children’s RoomsChildren’s Rooms Hygiene and AllergiesHygiene and Allergies Food Preparation Areas, Clean Food Preparation Areas, Clean
1 Supplier – to oversee LR-IG1 Supplier – to oversee LR-IG
– Set up linesSet up lines– supply parts & equipmentsupply parts & equipment– Provide customer support to glass producersProvide customer support to glass producers
TasksTasks** Day LightingDay Lighting Set up Day Lighting LabSet up Day Lighting Lab Lighting Criteria Lighting Criteria Measurement SystemMeasurement System SimulationSimulation Geometry OptimizationGeometry Optimization
RedesignRedesign Set up Production Line Set up Production Line Roll Forming Roll Forming Ladder & Tab RedesignLadder & Tab Redesign TransformerTransformer
**Tasks go through preliminary & final design reviews with external reviewers, & certain Tasks go through preliminary & final design reviews with external reviewers, & certain documentation procedures. documentation procedures.
Quality Assurance TestingQuality Assurance Testing Identify & Measure Failure ModesIdentify & Measure Failure Modes Installation at a Demonstration SiteInstallation at a Demonstration Site Training & ProceduresTraining & Procedures
Production and Field Testing of a New Technology for Light Regulation
IntroductionThe light regulating system consists of a Venetian blind sealed between the panes of insulated glass.
The blinds open and close electro-statically. The electrostatically actuated blinds replace the manually operated system of pulleys, gears, and gear box.
ObjectiveThe main objective was to evaluate every aspect of the design through manufacture and field testing.
Production Procedure
1. Set up rotating table.
ResultsDemonstrated the feasibility of light regulating technology in field tests.
Verified affordability and quality production.
2005
Electrostatic Induction
MethodField testing was performed in the Talley Student Center of North Carolina State University. A set of eight units, each measuring about three feet by five feet, were produced and installed in the Talley Student Center Boardroom.
2. Assemble slats, ladders and tabs
3. Remove the slat racks
4. Assemble the air spacer and install
5. Install glass
6. Perform functional test
7. Seal unit
8. Store unit
Slats open by electrostatic Induction.
Slats closeBy gravity.
Figures below show side view of slats and glass in open & closed positions.