125 lb. x 0.238) + 530 deg.......... = 3,253 deg.
Temperature of chimney 700 deg. + 460 deg................ = 1,160 deg.
Maximum duty (3,253 deg. - 1,160 deg.)/3,253 deg............. = 0.643 deg.
Work of displacing atmosphere by smoke at 700 deg.:
Cubic feet.
Volumes of gases at 70 deg......................... = 228.3
" " " " 700 deg......................... = 499.8
-----
Increase of volume.................... 271.5
Units.
Work done=
(194.46 lb. x 271.5 cub. ft. x 144 sq. in. x 15 lb.)
/722 units ..................................... = 147,720
Maximum amount of work to be expected =
3,248,425 x 0.643.............................. = 2,101,700
Deduct work of displacing atmosphere............. = 147,720
---------
Available work........................ 1,953,980
Actual work done:
Units.
1,620 lb. of water raised from 60 deg. and turned
into steam at 53 lb..... ...................... = 1,855,900
Loss by radiation and convection.......
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