Chilled Beams in Healthcare - ASHRAE® Illinois ChapterObjectives •Understand the basics of...

Chilled Beams in Healthcare

DOUGLAS FICK, PE, PMP

Senior Director

Illinois ASHRAE YEA Conference March 25, 2014

Objectives

• Understand the basics of chilled beams• ASHRAE Standards• Review the design choices• Discuss their performance after construction

2014 ASHRAE YEA Conference

History

• The new technology and application of chilled beams


Outline

• Passive Chilled Beams– Chilled Ceilings– Chilled Sails– Passive Beams

• Active Chilled Beams


Definition

• A chilled beam is a sensible only cooling device that uses chilled water above the room dew point to remove heat from the space


Chilled Ceilings


Chilled Ceilings

• Advantages– Excellent thermal comfort– Heating capabilities– Low ceiling requirements– Low Noise

• Disadvantages– Low Output, significant surface area– Significant piping connections


Chilled Sails


Chilled Sails

• Advantages– Good thermal comfort– Low ceiling requirements– Low Noise

• Disadvantages– Lower Output– No heating capabilities


Chilled Beams


Perforated tile

Water coil

Suspension rod

Soffit

Fabric skirt

Passive Beams


Passive Beams


• Advantages– Good thermal comfort– Low Noise

• Disadvantages– Lower Output– No heating capabilities– High free area ceilings

Active Chilled Beams

• Active Chilled Beam Basics




• Advantages– Excellent thermal comfort– Lower pressure than induction– Low Maintenance– Integration of Ventilation

• Disadvantages– Noise– Over ventilation potential

Regulatory

• ASHRAE Standard 170– TPS– Air Changes Per Hour

• Total• Outdoor Air

– Recirculation– Supplemental Heat Reduction


Regulatory

• ASHRAE Standard 200P– Title– Purpose: To define laboratory methods of testing chilled beams

to determine performance– Scope: This standard specifies test instrumentation, facilities,

installation methods and procedures for determining the performance of Chilled beams

– Completed Public Review– Resolving Comments

• Additional Public Review ?• Publish ?


Application


Technology


Application


Application

• Two Pipe or Four Pipe– Part Load Performance


Application

• Two Pipe or Four Pipe– Part Load Performance– Patient Comfort


Application

• Two Pipe or Four Pipe– Part Load Performance– Patient Comfort– Airflow


Application

• Two Pipe or Four Pipe– Part Load Performance– Patient Comfort– Airflow– Control Strategy


Application

• Condensation Management– Dry Coils– Condensation Sensors– Drain Pans


Application

• Control Accessibility


Application

• Dust, Dirt, Lint . . . .– Dry Coils

• Filters– Room filtration


Application

• Noise– Induction Units– Careful Selection


Application

• Energy– Year Round Chilled Water– Lower Chilled Water Temperatures– Commissioning


Application

• Cost– Chilled Beams– Terminal Box– Contractor Familiarity/ Comfort


Summary


Questions


Chilled Beams in Healthcare - ASHRAE® Illinois ChapterObjectives •Understand the basics of...

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