The Learning Corridor

Cherise RollinsApril 13th , 2004Lighting/Electrical OptionArchitectural Engineering ProgramThe Pennsylvania State University

The Greater Hartford Academies of the Arts, Math, and Sciences

Building Location

Magnet high school is located on the Learning

Corridor campus with other educational facilities. The Learning Corridor Campus

Site Plan

Downtown Hartford, CT

Building Information

Owner: The Learning Corridor, a non-profit organizationArchitect: Tai Soo Kim PartnersTotal Building Area: 2 stories, 75,000 ft2

Total Project Cost: $15 millionFeatures: science ‘suites,’ dance studios, recording studios

Building Use – The Corridor Concept

The Facility offers students from area high schools experiences in the arts, math, and sciences.

What makes it a “Corridor?”

Corridor concept is about connections

The Learning Corridor connects….

Students from all backgrounds

The city to the suburbs

The surrounding community

Design Outline

Front

Atrium Lobby Area

Daylight Study

Computer Lab and Creative

…Writing Classroom

Design Conclusions

Atrium Lobby Area

Two-story open area, 38 ft ceiling Used to showcase student artwork Many windows: Daylight only during daytime

General Description

North Main Entrance

Atrium Lobby AreaGeneral Description

Floor to ceiling wall of glass

View to courtyard

South View North View

Clere-story windows on E, W walls

Atrium Lobby AreaDesign Criteria

Orientation lightingSafe movement of people on both floors and up the stairwayStairway, Corridors: 10 fc min Lobby area: 10 fc min

Architectural lightingHighlight student artwork

Atrium Lobby AreaDesign Concepts

1

2 Nighttime: Create a connection to the surrounding community—”inside comes outside” by making surfaces radiate from the inside out

Daytime: Investigate existing daylight design in the space

Atrium Lobby AreaDesign Concepts

Investigate Daylight Design

Looked at changing light patterns and levels with time

Analyzed the glazing systems and resulting effect on heating and cooling loads

1

Analyzed window orientations and placement

South View

Atrium Lobby AreaDesign Concepts2 “Connection” Concept – Night design

Make surfaces (ceiling, walls, floor) bright

Highlight Artwork

Atrium Lobby AreaLighting Layout

4ft T5 HO Cove

26W CFL Downlight

Recessed T8 Wallwash

70W HID Doublewash light

Atrium Lobby AreaLighting Layout

4ft T5 HO Cove

Cove Detail

Atrium Lobby AreaSystem Controls

Photocell sensors used to adjust to changing

daylight levels

Stepped switching at 50% in each zone for flexible light

control during dusk-dawn hours

Atrium Lobby AreaDesign Renderings

Atrium Lobby AreaDesign Renderings

Atrium Lobby AreaAnalysis of Design

Illuminance on floor and stairs is adequate for tasks

Fairly even illuminance on walls and ceiling

Atrium Lobby AreaAnalysis of Design

Power Density = 1.73 W/ft2

< 1.8 W/ft2 Max

Lobby Power Density Corridor Power Density

Power Density = 0.65, 0.4 W/ft2

< 0.8 W/ft2 Max

Atrium Lobby AreaDaylight Study

Direct sun and Overcast sky3 days: 3/21, 6/21, 12/21 Varying times throughout day (morning and noon)Initial glazing and surface properties:

Low-e insulating glazing, t~0.36

Looked at effects of overhangs, clerestory windowsNoted effects of light levels on critical surfaces (floor, stairs)Approximated outdoor : indoor daylight ratio

Goal ~ 2% (Leed)

Atrium Lobby AreaDaylight Renderings

Atrium Lobby AreaDaylight Study Conclusions

Design is good for spring, summer and clear skiesOvercast skies and winter months

Space too dark for tasks Outdoor : Indoor ratios low (low as 0.8%)Space needs electric light to provide enough light on critical surfaces

OR

Increase amount of daylight on critical surfaces

Atrium Lobby AreaDaylight Redesign

Increase transmission of daylight through glazingPropose new glazing system

Transmittance ~ doubled (t=62%)Low-e, insulating

Analyze effects of system vs. originalLight levels on critical surfacesEnergy costs: heating, cooling loadsMaterial costs: first cost and life cycle cost analysis

Atrium Lobby AreaDaylight Redesign

New Glazing

Outer: Blue-Green Tint

Inner: Clear, Low-e Coated

Original Glazing

Outer: Clear, Low-e

Inner: Clear

Atrium Lobby AreaDaylight Redesign

Light levels on critical surfaces approximately doubled

Dark spots on floor Brighter on floor, stairs

Dec 21st, 12pm, overcast sky

Atrium Lobby AreaDaylight Redesign

Mechanical Energy Costs: Heating and Cooling (HAP)

Yearly Cooling Load = 76% original

Yearly Heating Load = 116% orginal

Energy costs applied in $/BTU

Total Yearly Costs:

Original: $2000.65

New: $1648.09 = 82% original cost

Saves ~ $352.00/yr

Atrium Lobby AreaDaylight Redesign

Material Costs: First costs and life cycle costsGlass Contractor Estimated Prices

Original: $9.32/sq.ft * 1173 sq.ft = $10,932.36 total

New: $10.40/sq.ft * 1173 sq.ft = $12,199.20 total

First Material Costs

New glazing is $1,266.84 more expensive

Atrium Lobby AreaDaylight Redesign

Find out when energy savings will pay off difference in first costs

Compound Interest Equation

P = C (1 + r/n)nt , assumed r = 6%, compounded yearly

$1,266.84 (1 + 0.06)t = $352.00*t

t = 4.75 years

Pay off will occur between the 4th and 5th years.

By the end of year 5, total savings = $1,760

Computer Lab

Split-level space, 12 ft ceilingSpace contains 21 computers and a projection screen

General Description

East Wall – 40 ft Wide

Door

Windows

North Wall –25 ft Deep

Computer LabGeneral Description

View of back of room Counter Section

Level 2 Elevation: 2ft

Computer LabGeneral Description

View of front of room-2nd Level

Projection screen faces back of room

Projector in middle of room, suspended ~ 3ft

Computer LabDesign Criteria

Accommodate VDT usageMinimize direct and reflected glare

Provide control of daylightShades

Concentrate light on work areasLevel for note-taking, target 30 fcMinimized light on projection screen, 5fc max

Computer LabDesign Concepts

Direct light distribution to sufficiently light work areas with low light on projection screen

1

2 Recessed fixtures to avoid blocking projector view of projection screen

3 Shielded lamp to eliminate bare bulb brightness

Computer LabDesign ConceptsVDT Fixture for use in computer environments

Clean ceiling:

2ft x 2ft Recessed fixture

Diffuse Light:

Shielded lamp

“Specifically designed for computer environments where minimum reflector brightness is essential and low ceiling

contrast ratios contrast are required.”

Computer Lab

Minimizes reflected image glare in VDT screens

Design Concepts

Glare is minimized with a formed reflector that allows no excessive brightness above 55°

Computer LabDesign Concepts

Provide Shades for windows

3

Light back wall to brighten perimeter

1

2

Light concen-tratedabove work-stations

Computer LabLighting Layout

26W CFL Downlight2x2 Recessed

Indirect Recessed T8 Wallwash

Computer LabSystem Controls

Flexible switching: 2-24W T5HO Lamps/VDT fixture

Level 1 and 2 switched separately

Computer LabSystem Controls

Presentation Scene—Wall washers off

Projection screen use, computer workstations, note-taking

Computer LabDesign Renderings: General Classroom Scene

Computer LabDesign Renderings: Presentation Scene

Computer LabAnalysis of Design

Scene 1: Sufficient light on workstations (30 fc min)

Scene 2: Low light on Projection Screen (5 fc max) Sufficient light on workstations (30 fc min)

Computer LabAnalysis of Design

Power Density = 1.16 W/ft2

< 1.6 W/ft2 Max

Computer Lab Power Density

Design ConclusionsThe lighting designs met established design goals in each space

Integrates design concepts and provides sufficient light levelsEach design complies with power density and automatic shutoff requirements of Standard 90.1

Lobby space is more daylight efficientIntegrated daylight control with photocell sensorsIntroduced more efficient glazing system that increased visible light transmission and decreased overall heating, cooling costs

Computer Lab design is unique to the VDT and classroom needs

Flexible control of lighting systems with variety of switching options Comfortable environment for both computer, projection screen

Many Thanks To:

Whit Iglehart & TSKP Architects

The Learning Corridor, a non-profit organization

Dr. Mistrick, Dr. Moeck, Dr. Freidhaut

Anthony Punzalan, VanZelm Heywood & Shadford, Inc.

Fellow AE’s

Connections

Students to Students

City to Suburbs

Community