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The Use of Water in HVAC Systems
242 The HVAC World
8.9 Eliminating Energy Waste
During Commissioning
Every effort should be made in the design, testing, and initial opera-
tion of HVAC water systems to eliminate the waste of energy in such
systems. Typical of this is the testing and balancing procedures that
are used to commission a new chilled or hot water system. In the past,
a calibrated balance valve was used to check the flow through an indi-
vidual coil. This balance valve was adjusted until the design flow was
achieved through that coil. This is shown in Fig. 8.14a; Fig. 8.14b
a. Calibrated balance valve to determine flow.
Control valve
∆P
b. Permanent loss of balance valve is eliminated
by measuring friction loss of coil or control valve
and determining flow from this data.
Figure 8.14 Testing for coil flow.
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