AUTOFLAME Mk8 MM - Page 280

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.