REFRIGERATION 67 



Adding to this the 20 per cent loss of ice in the ice house, we 

 arrive at the total amount of ice that should be stored for a 

 plant of such size and operated under such conditions as speci- 

 fied. 



58.15 X — = 72.69 tons. 



o 



2. Space Required for Ice Storage. — The weight of i cubic 

 foot of water at 60° F. equals 62.355 pounds; the specific gravity 

 of ice is considered to be from .917 to .922, the average being 

 .92. Therefore 



Weight of I cubic foot of ice = 62.355 X .92 = 57.37 pounds. 



Space in cubic foot required to store 72.7 tons of ice 



72.7 X 2,000 u- r 4. 



= = 2,534 cubic feet. 



57-37 



In addition to this, from 10 to 20 per cent should be allowed 

 for spaces between ice-blocks and for sawdust insulation in the 

 ice house. 



An ice house built in the form of a cube is most satisfactory. 

 Each dimension of this cube of ice, with insulation, is, with 



20 per cent allowance, equal to \/2,534 X tIt = i4-S f^^t. 



To this figure should be added the amount of overhead space 

 required for working purposes. 



