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48 TRG-TRC016-EN
notes
period two
Chilled-Water System Design
Another advantage of the primary-secondary system is that the production loop
is not affected by the distribution pumping arrangement.
For example, multiple distribution pumps can be used to vary the flow within
the distribution loop. Providing variable flow through the application of
multiple pumps, or through variable-speed drives on one or more pumps, is
more energy efficient than simply riding the pump curve. It also provides
greater system redundancy.
Multiple Distribution Pumps
distribution
distribution
pumps
pumps
b
y
p
a
s
s
p
i
p
e
b
y
p
a
s
s
p
i
p
e
supply
supply
to loads
to loads
return
return
from loads
from loads
Figure 54