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Sizing
A Sussman Electric Steam Boiler
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Use the following Table to determine KW Boiler rating
when steam load and feed water temperatures are known.
KILOWATTS PER POUND OF STEAM
WORKING PRESSURE (psig)
| FEED
WATER (°F) |
0 |
15 |
50 |
100 |
150 |
| 50 |
0.3318 |
0.3359 |
0.3401 |
0.3429 |
0.3441 |
| 70 |
0.3259 |
0.3300 |
0.3343 |
0.3370 |
0.3382 |
| 100 |
0.3171 |
0.3212 |
0.3255 |
0.3283 |
0.3294 |
| 120 |
0.3112 |
0.3154 |
0.3196 |
0.3224 |
0.3236 |
| 150 |
0.3025 |
0.3066 |
0.3108 |
0.3136 |
0.3148 |
| 170 |
0.2966 |
0.3001 |
0.3050 |
0.3077 |
0.3089 |
| 200 |
0.2878 |
0.2919 |
0.2962 |
0.2978 |
0.3001 |
Example: Need a boiler to produce 450 lbs. steam/hr
at 100 psig with the available feedwater temperature
50 °F.
From
the above chart, find 0.3429 KW/lb. of steam.
450
lbs. steam/hr. X .3429 = 154.3 KW boiler required.
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