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)