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Sizing

Monday, September 29, 2014 1:12:00 PM

Sizing A Sussman Electric Steam Boiler

 

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.