December 2012
Beginner
528 pages
17h 31m
English
Content preview from Introduction to Electrical Power and Power Electronics
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480 Introduction to Electrical Power and Power Electronics
Length of the water flow = 50 cm = 0.5 m. Then, Equation 17.21 gives
Pressure drops
5555 48
298
18
∆P =
××
251
00 0
0
...
.
.
112
fornobends 793 Pa
=m
.
.
.
+=
×
=
0
793
981 1000
008oof waterhead.
The pressure drop here is negligible, as expected in a plate heat exchanger. The
pump rating is primarily determined by the pressure drops in other plumbing that
brings the water to the plates.
17.5.3 Cooling water qUality
The electrically live hollow stator conductors (Figure 17.4) in large utility-scale syn-
chronous generators are cooled with deionized distilled water that gives the equipment
a life of 25 to 30 yea ...
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