Application of Ceiling Radiant Cooling in a University

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: sam 11@psu. edu Web: http: //doas-radiant. psu. edu

Project Location n Engineering Unit B, a building built in the early 1900’s

Some Space Attributes n n n Area Height Use Occupants Surroundings

Project Objectives n n n n n 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, PE’s Demo Web based access

DOAS/Radiant Cooling Schematic

A Virtual Tour

Enthalpy Wheel OA RA

Off Design Day Performance

What About Controls? n The control Panel

Space Temperature & Condensation Prevention Control

Enthalpy Wheel Control

Experiences Since August ‘ 02 n n n 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.

Experiences Continued n n n Sensible and Latent load decoupling Acoustical Performance Maintenance Controls Dirt and Drafts Thermal Comfort

Conclusions n n n The system is working even better than expected! It is this speaker’s 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 2: 00, I will have more time to lay out the entire approach. Join me if you want to learn more—or go to the DOAS web site!