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Howard County General Hospital
Columbia, Maryland Howard County General Hospital Casey Schardt Lighting/Electrical Option
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Project Information Location: Columbia, Maryland
$20 Million Addition and Renovation to existing hospital Completed in July 2003. New Emergency, Birthing, and Pediatric Departments, and expanded Imaging Dept.
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Analysis Lighting Design Electrical Redesign Economic Analysis
Lobby Nurse Station Conference Room Electrical Redesign Uninterruptible Power Supply Emergency Generator Motor Control Center Analysis of Power Distribution for L+D Unit Economic Analysis UPS System Lighting Efficiency Mechanical Analysis UPS Impact Lighting Changes Impact
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Lighting Design: Lobby
Children’s Area Vestibule Waiting Area Bulkhead over desk Reception Vending
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Lighting Design: Lobby Design Criteria
Reception Desk Ambient Illuminance: 30 fc Illuminance on Desk: 50 fc High uniformity (less than 4:1 luminance ratio) Minimal direct glare Good color and modeling of faces Waiting/Vending Areas Local level of 30 fc available for reading Minimal glare to reduce veiling reflections Illuminance on pictures: 50 fc Corridor 10 fc for orientation
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Lighting Design: Lobby Solution
Reception Desk Semi-indirect pendant Louvered slots in bulkhead above desk Waiting/Vending Areas Compact fluorescent downlights Metal halide spotlights on pictures Table lamps Corridor
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Lighting Design: Lobby
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Lighting Design: Lobby
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Lighting Design: Lobby
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Lighting Design: Lobby
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Lighting Design: Conference Room
Projection Screen Marker Board PC Monitor TV
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Lighting Design: Conference Room Design Criteria
Horizontal Illuminance of 50 fc on table Vertical Illuminance of 30 fc on faces Vertical Illuminance of 30 fc on white board Very high uniformity on faces for videoconferencing Minimal veiling reflections on VDTs and paper tasks Good color and modeling of faces
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Lighting Design: Conference Room Solution
Indirect/direct linear pendant above table Compact fluorescent wallwash downlights on three walls Asymmetric linear slot above marker board
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Lighting Design: Conference Room
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Lighting Design: Conference Room
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Lighting Design: Conference Room
Facial Luminance Uniformity
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Uninterruptible Power Supply
Problems Sensitive imaging equipment losing information CAT Scan Radiology Radio/Fluoroscopy High costs of slight power disturbances Up to $10,000 per procedure Solution Uninterruptible power supply (UPS) Battery backup to ride through outtages Supplies a constant and smooth supply of electricity
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Uninterruptible Power Supply
Redesign (with UPS) Existing (without UPS)
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Uninterruptible Power Supply
Impact on HVAC Generates 98,500 BTU/hour Cooling Load Increase of 8 tons of cooling Minimal impact on system of (5) 500-ton chillers Electrical Room Increased ventilation capacity required Increase of 4500 cfm
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Economic Analysis: Lighting
Existing downlight fixtures are inefficient 434 downlights with 2 horizontal 26-watt lamps are 37.1 % efficient Similar downlights with one vertical 26-watt lamp are 74.2% efficient Using efficient downlights reduces wattage Reduces amount of maintenance
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Economic Analysis: Lighting
Cost Savings with more efficient downlights Initial Savings: $15,609 Costs of lamps and ballasts Fixture cost, and labor are negligible Annual Savings: $8,863 per year Energy usage savings Energy demand savings Lamp and ballast replacement savings Reduced cooling loads Payback period Immediate (lower initial and operating costs)
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Conclusions Lighting Design Electrical Design Economic Analysis
Design criteria are met Efficient design Electrical Design UPS improves reliability Design accounts for impacts on other systems Economic Analysis Savings on both initial and operating costs More energy efficient More environmentally friendly
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Acknowledgements I would like to thank the following: My Family
My Roommates, Friends, and Classmates The entire Architectural Engineering Department faculty and staff Rob Banas and Leach Wallace Associates John Reese of Reese Engineering Ed Wunderley of Burt Hill Kosar Rittelman Associates Howard County General Hospital Wilmot Sanz Architecture/Planning
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Questions?
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Lighting Design: Nurse Station
Corridor Charting Nurse Station Nurse Station Staff Corridor
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Lighting Design: Nurse Station Design Criteria
Nurses’ Desks Ambient Illuminance: 30 fc Illuminance on Desk: 50 fc High uniformity (less than 4:1 luminance ratio) Minimal direct glare Good color and modeling of faces Charting Corridor 10 fc for orientation
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Lighting Design: Nurse Station Design Criteria
Nurses’ Desks Semi-indirect pendant Louvered slots in bulkhead above desk Charting Prismatic lensed troffer Corridor Recessed direct/indirect
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Lighting Design: Nurse Station
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Uninterruptible Power Supply
Economic Analysis High Initial Cost For one large unit: $182,000 For individual units (5) for each piece of equipment: $444,000 Payback Period 18 total failures of all equipment 4 power outages (assuming all equipment is running)
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