Trane TRG-TRC016-EN manual Distribution

period two

Chilled-Water System Design

notes

Multiple Distribution Pumps

			distribution
return			pumps
from loads			A
			B
		C	supply
			toloads
A	B C
			Figure 55

A variation of the multiple-pump configuration is to use separate pumps to deliver water to specific, dedicated loads. An example is a chilled-water system serving a college campus. Separate distribution pumps supply water to the east (A), west (B), and central (C) portions of the campus. A primary advantage of this configuration is flexibility. Expanding the system can be achieved by simply adding another distribution pump to the existing plant and connecting it to the piping that runs to the new building.

A variation of this multiple, dedicated pump configuration is often called distributed pumping. It is sometimes used in very large systems that serve multiple buildings. In a distributed pumping system, a dedicated distribution pump is located out in the system at each building, instead of all the pumps being housed in the chiller plant. This configuration offers the potential for additional pump energy savings, because each pump only needs to pump the water required for the building it serves.

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