howard county general hospital casey schardt lighting/electrical option columbia, maryland
TRANSCRIPT
Howard County General Hospital
Casey Schardt Lighting/Electrical Option
Columbia, Maryland
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.
Analysis Lighting Design
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
Lighting Design: Lobby
Waiting Area
Reception Vending
Vestibule
Children’s Area
Bulkhead over desk
Lighting Design: LobbyDesign 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
• 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– Compact fluorescent downlights
Lighting Design: LobbySolution
Lighting Design: Lobby
Lighting Design: Lobby
Lighting Design: Lobby
Lighting Design: Lobby
Lighting Design: Conference Room
Projection Screen
Marker Board
TVPC
Monitor
• 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
Lighting Design: Conference RoomDesign Criteria
• Indirect/direct linear pendant above table
• Compact fluorescent wallwash downlights on three walls
• Asymmetric linear slot above marker board
Lighting Design: Conference RoomSolution
Lighting Design: Conference Room
Lighting Design: Conference Room
Lighting Design: Conference Room
Facial Luminance Uniformity
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
Uninterruptible Power Supply
Existing
(without UPS)
Redesign
(with UPS)
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
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
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)
Conclusions• Lighting Design
– 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
AcknowledgementsI 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
Questions?
Lighting Design: Nurse Station
Nurse Station
Nurse Station
Charting
Corridor
Staff Corridor
• 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– Ambient Illuminance: 30 fc– High uniformity (less than 4:1 luminance ratio)– Minimal direct glare
• Corridor– 10 fc for orientation
Lighting Design: Nurse StationDesign Criteria
• Nurses’ Desks– Semi-indirect pendant– Louvered slots in bulkhead above desk
• Charting– Prismatic lensed troffer
• Corridor– Recessed direct/indirect
Lighting Design: Nurse StationDesign Criteria
Lighting Design: Nurse Station
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)