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TRG-TRC011-EN 33
period two
Absorption Chiller Types
notes
While they are presently not available, higher-effect absorption chillers are
being studied for commercial use due their potential for higher COPs. Typical
COPs for these triple-effect cycles are 1.4 to 1.5. Implementation of these cycles
into commercial water chillers, however, includes difficulties such as the
following.
n Higher solution temperatures create problems with stability of the
absorbent solution and performance additives, as well as additional
material corrosion problems.
n In some cases, higher operating pressures which require high-cost pressure
vessel designs.
n Greater first cost due to the need for additional pumps and heat exchangers.
n Larger physical size.
As mentioned earlier, other cycles and fluid combinations are also being
studied for commercial use. The focus of this clinic, however, is limited to water
chillers that use a lithium bromide-and-water solution.
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◆ Problems with solution stability
◆ Increased risk of corrosion problems
◆ More expensive pressure vessel design requirements
◆ Greater first cost due to added components
◆ Larger physical size
Figure 38