Sussman SSB 12-18 Installation, Operation And Maintenance Manual - page 16
Installation, Operation & Maintenance Manual
Sizing
16
Use the following Table to determine KW Boiler rating when steam load
and feedwater temperatures are known.
_________________________________________________________
Feed Water
0
2
10
15
25
40
50
75
100
( F˚)
_________________________________________________________
40
.3347
.3355
.3375
.3388
.3406
.3422
.3431
.3447
.3458
_________________________________________________________
50
.3318
.3326
.3345
.3359
.3376
.3392
.3401
.3417
.3429
_________________________________________________________
60
.3288
.3296
.3316
.3329
.3347
.3363
.3372
.3388
.3400
_________________________________________________________
70
.3259
.3267
.3287
.3300
.3318
.3334
.3343
.3359
.3370
_________________________________________________________
80
.3229
.3238
.3278
.3271
.3288
.3305
.3313
.3329
.3341
_________________________________________________________
90
.3200
.3208
.3238
.3242
.3259
.3275
.3284
.3300
.3312
_________________________________________________________
100
.3171
.3179
.3199
.3212
.3229
.3246
.3255
.3271
.3283
_________________________________________________________
110
.3142
.3150
.3170
.3183
.3200
.3217
.3225
.3242
.3253
_________________________________________________________
120
.3112
.3210
.3140
.3154
.3171
.3287
.3196
.3212
.3224
_________________________________________________________
130
.3083
.3091
.3111
.3124
.3142
.3160
.3167
.3183
.3195
_________________________________________________________
140
.3054
.3062
.3082
.3095
.3113
.3129
.3137
.3154
.3165
_________________________________________________________
150
.3025
.3032
.3052
.3066
.3083
.3099
.3108
.3124
.3136
_________________________________________________________
160
.2995
.3003
.3029
.3036
.3054
.3070
.3079
.3095
.3107
_________________________________________________________
170
.2966
.2974
.2994
.3001
.3025
.3041
.3050
.3066
.3077
_________________________________________________________
180
.2937
.2945
.2964
.2978
2995
.3011
.3020
.3036
.3048
_________________________________________________________
190
.2907
.2915
.2935
.2948
.2966
.2982
.2981
.3007
.3019
_________________________________________________________
200
.2878
.2886
.2906
.2919
.2937
.2953
.2962
.2978
.2989
_________________________________________________________
Example:
Need a boiler to produce 450 lbs. steam/hr. at 75 psig with the available feedwater temperature 50˚ F.
From the chart above, find .3417 KW/Lb. of steam 450 lbs. steam/hr. x .3417= 153.8 KW boiler required