Application of Ceiling Radiant Cooling in a University Environment

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Application of Ceiling Radiant Cooling in a
University Environment

• ASHRAE Chicago Seminar 7, 1/26/03

Stanley A. Mumma, Ph.D., P.E. Professor,
Architectural Engineering Penn State
University email sam11_at_psu.edu
Web http//doas-radiant.psu.edu
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Project Location

• Engineering Unit B, a building built in the early
  1900s

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Some Space Attributes

• Area
• Height
• Use
• Occupants
• Surroundings

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Project Objectives

• Decouple the space sensible latent loads
• Control condensation
• Experience ceiling radiant cooling
• Check the capacity of radiant cooling
• Check the acoustical qualities
• M O
• Controllability
• Educational tool for OPP, Students, PEs
• Demo Web based access

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DOAS/Radiant Cooling Schematic
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A Virtual Tour
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Enthalpy Wheel
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Off Design Day Performance
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What About Controls?

• The control Panel

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Space Temperature Condensation Prevention
Control
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Enthalpy Wheel Control
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Experiences Since August 02

• Balancing the DOAS Air Flows
• Operation under Manual Control, --EW!
• Operation Of The Panel Control Valve When Placed
  In The Automatic Mode
• Condensation Experiences
• Moisture Migration Through the very Porous
  Envelope
• Operation of the Enthalpy Wheel in the Winter.

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Experiences Continued

• Sensible and Latent load decoupling
• Acoustical Performance
• Maintenance
• Controls
• Dirt and Drafts
• Thermal Comfort

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Conclusions
QUESTIONS

• The system is working even better than expected!
  It is this speakers opinion that the system
  represents the next generation HVAC solution.
• No barriers were observed in this project that
  would prevent the adoption of DOAS/Radiant
  systems by the HVAC Industry!
• In the ALI-DOAS short course this afternoon at
  200, I will have more time to lay out the entire
  approach. Join me if you want to learn moreor
  go to the DOAS web site!