16 Heat Flow
Mk8 MM Manual Page | 281
Note: Feed water temperature sensors can be used for greater accuracy.
The amount of heat needed to change the feed water to steam is found by the amount of heat needed to
raise 1 lb of feed water at 180.0°F to steam at 51 PSI and 298.7
°
F. The standard steam tables are built in
within the steam flow metering on the MM, and this is then calculated as 1032 Btu/lb. This figure is the latent
heat of liquid into steam (gas) plus the sensible heat components.
The steam flow rate is shown in lb/hr is determined by:
=
()
=
19,434,000 /
1032 /
Therefore, the current steam flow rate is calculated to be 18,831 Btu/lb.
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