Heatcraft Refrigeration Products H-ENGM0408 - Manual (Page 18)

18
Table 9
Heat Loads of Keg and Bottled Beer (BTU / 24 HR)
Type and Size Temperature Reduction of Beer only. ºF.
of Container
60 50 40 30 20 15 10 5
Wood
One Keg
— — 12000 9000 6000 4500 3000 1500
Half Keg — — 5600 4650 3100 2325 1550 775
Quarter Keg — — 3200 2400 1600 1200 800 400
Eighth Keg — — 1640 1230 820 615 410 205
Aluminum
Half Keg
— — 5200 3900 2600 1950 1300 650
Quarter Keg — — 2560 1920 1280 960 640 320
Eighth Keg — — 1400 1050 700 525 350 175
Steel
Half Keg
— — 4800 3600 2600 1800 1200 600
Quarter Keg — — 2400 1800 1200 900 600 300
Bottles
6 oz.
32 27 22 16 10.8 8.1 5.4 2.7
7 oz. 37 31 25 20 124 9.3 6.2 3.1
8 oz. 42 35 28 21 14.0 10.5 7.0 3.5
9 oz. 47 38 30 23 15.2 11.4 76 3.8
12 oz. 60 50 40 30 20 15 10 5.0
Cases of 24 - 12 oz.
Bottles/Cans
1920 1600 1280 960 640 480 320 160
Table 13
General standard for insulation thickness in storage rooms
ºF. ºC. Styrofoam Urethane
-50º to -25º -45º to -32º 8 6
-25º to -0º -32º to -18º 6 4
0º to 25º -18º to -4º 4 4
25º to 40º -4º to 5º 4 3 - 4
40º and up +5º and up 2 2
Storage Desirable Insulation
Temperature Thickness in Inches
Battery Heat Gain Approximate
operated per hour of total weight
load capacity truck operation of lift truck
lb. BTU / hr.* lb.
2,000 14,000 6,000
4,000 21,000 8,000
6,000 23,000 12,000
8,000 26,000 14,000
Table 14
Heat gain due to operation of battery operated lift truck
* Heat gain from lift trucks with internal combustion engines can
be approximated by multiplying the engine horsepower by 2,545
by the number of hours of operation (BTU/24 Hrs.)
Average Entering Final
Weight Specific Carcass Carcass
Carcass lbs. Heat Temp. ºF. Temp. ºF.
Cattle 550 0.77 106 35
Calves 150 0.76 104 35
Sheep 45 0.76 101 33
Hogs 180 0.54 106 35
Table 12
Heat equivalent of Occupancy
BTU per (HP) (HR)
Motor Connected
Connected Losses Load
Motor Load In Outside Outside
HP Refr Space 1 Refr Space 2 Refr Space 3
1/8 to 1/2 4,250 2,545 1,700
1/2 to 3 3,700 2,545 1,150
3 to 20 2,950 2,545 400
Table 10
Carcass Weight
1 For use when both useful output and motor losses are dissipated
within refrigerator space: motors driving fans for forced circulation
unit coolers.
2 For use when motor losses are dissipated outside refrigerated space
and useful work of motor is expended within refrigerated space:
pump on a circulating brine or chilled water system, fan motor out-
side refrigerated space driving fan circulating air within refrigerated
space.
3 For use when motor heat losses are dissipated within refrigerated
space and useful work expended outside of refrigerated space: motor
in refrigerated space driving pump or fan located outside of space.
Cooler Heat Equivalent / Person
Temperature ºF. BTU / 24 Hrs.
50 17,280
40 20,160
30 22,800
20 25,200
10 28,800
0 31,200
-10 33,600
Table 11
Heat equivalent of electric motors
Table 15
Specific heats of various liquids and solids
Liquids
Acetic Acid 0.522 79 - 203
Alcohol-Ethyl 0.680 32 - 208
Alcohol-Methyl 0.610 59 - 68
Calcium Chloride
Brine (20% by wt.) 0.744 68
Carbon
Tetrachloride 0.201 68
Chloroform 0.234 68
Gasoline 0.500 32 - 212
Glycerine 0.575 59 - 120
Olive Oil 0.471 44
Toluene 0.404 68
Turpentine 0.420 68
Solids
Aluminum 0.214 —
Asphalt 0.220 —
Bakelite 0.350 —
Brickwork 0.200 —
Brass 0.090 —
Bronze 0.104 —
Concrete 0.156 —
Glass 0.200 —
Ice 0.465 -4
Ice 0.487 32
Iron (Cast) 0.120 —
Lead 0.031 —
Paper 0.320 —
Porcelain 0.180 —
Rubber Goods 0.480 —
Sand 0.191 —
Steel 0.120 —
Woods
Fir 0.650 —
Oak 0.570 —
Pine 0.670 —
Specific Heat
Name BTU/lb./ºF. Temp ºF.