Eclipse Combustion Engineering Guide - Burnerparts
Eclipse Combustion Engineering Guide - Burnerparts
Eclipse Combustion Engineering Guide - Burnerparts
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CHAPTER 5 – STEAM & WATER<br />
BOILER TERMINOLOGY AND CONVERSION FACTORS<br />
Boiler horsepower – One boiler horsepower<br />
= 33,479 Btu/hr heat to steam<br />
= 34.5 lb/hr of water evaporated<br />
from and at 212°F<br />
= 9.8 Kilowatts<br />
Dry Steam – Steam which contains no liquid water.<br />
Enthalpy – Heat content, Btu/lb, of a liquid or vapor.<br />
Latent heat of vaporization – The heat required to convert a<br />
material from its liquid to its vapor phase without raising its<br />
temperature. The latent heat of vaporization of water at 1<br />
atmosphere pressure and 212°F is 970.3 Btu/lb.<br />
Quality – In a mixture of steam and water, the weight percentage<br />
which is present as steam; in other words, the percent<br />
of complete vaporization which has taken place. The quality of<br />
saturated steam is 100%.<br />
Saturated Steam – Steam which is at the same temperature as<br />
the water from which it was evaporated.<br />
Wet Steam – Steam which contains liquid water. Its quality is<br />
less than 100%.<br />
PROPERTIES OF SATURATED STEAM<br />
V g ,<br />
Specific h f , h fg , h g ,<br />
Volume of Heat Content Latent Heat, Heat Content<br />
Temperature, Pressure, psi Vapor of Liquid, of Vaporization, of Vapor<br />
°F Absolute Gauge cu ft/lb Btu/lb Btu/lb Btu/lb<br />
32 .089 – 3304.7 -0.018 1075.5 1075.5<br />
40 .121 – 2445.8 8.03 1071.0 1079.0<br />
50 .178 – 1704.8 18.05 1065.3 1083.4<br />
60 .256 – 1207.6 28.06 1059.7 1087.7<br />
70 .363 – 868.4 38.05 1054.0 1092.1<br />
80 .507 – 633.3 48.04 1048.4 1096.4<br />
90 .698 – 468.1 58.02 1042.7 1100.8<br />
100 .949 – 350.4 68.00 1037.1 1105.1<br />
110 1.28 – 265.4 77.98 1031.4 1109.3<br />
120 1.69 – 203.3 87.97 1025.6 1113.6<br />
130 2.22 – 157.3 97.96 1019.8 1117.8<br />
140 2.89 _ 123.0 107.95 1014.0 1122.0<br />
150 3.72 – 97.07 117.95 1008.2 1126.1<br />
160 4.74 – 77.29 127.96 1002.2 1130.2<br />
170 5.99 – 62.06 137.97 996.2 1134.2<br />
180 7.51 – 50.22 148.00 990.2 1138.2<br />
190 9.34 – 40.96 158.04 984.1 1142.1<br />
200 11.53 – 33.64 168.09 977.9 1146.0<br />
212 14.696 0 26.80 180.17 970.3 1150.5<br />
220 17.19 2.49 23.15 188.23 965.2 1153.4<br />
240 24.97 10.27 16.32 208.45 952.1 1160.6<br />
260 35.43 20.73 11.76 228.76 938.6 1167.4<br />
280 49.20 34.50 8.64 294.17 924.6 1173.8<br />
300 67.01 52.31 6.47 269.7 910.0 1179.7<br />
320 89.64 74.94 4.91 290.4 894.8 1185.2<br />
340 117.99 103.29 3.79 311.3 878.8 1190.1<br />
360 153.01 138.31 2.96 332.3 862.1 1194.4<br />
380 195.73 181.03 2.34 353.6 844.5 1198.0<br />
400 247.26 232.56 1.86 375.1 825.9 1201.0<br />
500 680.86 666.16 0.67 487.9 714.3 1202.2<br />
600 1543.2 1528.5 0.27 617.1 550.6 1167.7<br />
700 3094.3 3079.6 0.075 822.4 172.7 995.2<br />
705.47* 3208.2 3193.5 0.051 906.0 0 906.0<br />
*Critical Temperature<br />
30