16 Heat Flow
Mk8 MM Manual Page | 280
Note: If an EGA is optioned, then the stack losses are taken from the EGA data rather than default system
values, this provides greater accuracy.
= 1% ×
= 1% × 24,600,000 /
Therefore, combined blowdown losses are currently 246,000 Btu/hr.
(
)
=
(
)
= 24,600,000
246,000
4,674,000
246,000
Therefore, the net calorific value of the fuel (wet) is 19,434,000 Btu/hr.
The boiler efficiency is determined by:
=
()
=
19,434,000 /
24,600,000 /
Therefore the current boiler efficency is 79.0%, which is seen on the Steam Flow Status screen.
Figure 16.4.1.i Steam Flow Status
The Steam Flow status screen shows that the feed water temperature is currently at 180.0°F, with steam at a
pressure of 51 PSI and 298.7
°
F.
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