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TRG-TRC016-EN 103
notes
We will now review the main concepts that were covered in this clinic on
chilled-water systems.
In Period One, we learned about the different types of vapor-compression and
absorption water chillers. Vapor-compression chillers are differentiated
primarily by the type of compressor used and whether they use an air-cooled
or water-cooled condenser. Absorption chillers are primarily differentiated by
whether they are indirectly or directly fired.
We compared the use of air-cooled versus water-cooled chillers. Air-cooled-
chiller advantages include lower maintenance costs, a prepackaged system for
easier design and installation, and better low-ambient operation. Water-cooled-
chiller advantages include greater energy efficiency (at least at design
conditions) and longer equipment life.
period five
Review
Chilled-Water Systems
Figure 111
Review—Period One
▲ Vapor-compression
water chillers
◆ Air-cooled versus water-
cooled
▲ Absorption water
chillers
▲ Equipment rating
standards
▲ ASHRAE/IESNA
Standard 90.1-1999
Figure 112
period five
Review