2. 2
Sommaire de la présentation
• Principe et opération des poutres climatique
• Conception et analyse énergetique
• Avantages et désavantages
• Contrôles
• Installation et mise en service
4. Réduction de la consomation totale
du bâtiment
Conventional
HVAC System
Radiant Cooling
& Chilled Beams*
Other Loads
Air Transport load
Load From Lights
Fan & Motor
100% Peak Power
57.7%
37.5%
18.8%
9.3%
34.4% 34.4%
1.9%
9.4%
7.5%
1.5% Pumps
Chiller
62.5%
Percentages relative to overall peak power for the conventional system
Figure from: Centre For Building Science News, Lawrence Berkeley Laboratory, “Hydronic Radiant Cooling Systems”, Fall 1994.
* Figure does not include additional fan energy associated with developing pressure for active chilled beam operation.
5. Installation & Opération
Installation
• Easy mounting with hanging rails and
brackets
• No moving parts
• Very little maintenance
• Easy access from the front for coil
cleaning.
• No electrical connections
• Inexpensive terminal controls
Operation
• High chilled water temperature 14-
16°C (57-61°F)
• Primary ‘fresh’ air quantity tailored to
suit ventilation requirements.
• Self regulating
• VAV for tight temperature control
The purpose of this presentation is to:
Define Free Cooling,
Discuss the different types of free cooling systems that have, and are being used, along with the advantages and disadvantages of each,
Walk thru the design of a typical free cooling system while developing an understanding of the factors affecting performance and cost, and
Go thru “tips” for successful operation.