COLD STORAGE 101 
Refrigerating Coils in Storage Room. Where 
forced circulation is not available, the usual method of 
cooling rooms for storage purposes is to arrange a series 
of direct expansion pipes at the ceiling and along the 
walls near the ceiling. In case the refrigerating machin- 
ery is not operated during the night it will be neces- 
sary to use a brine tank in addition to the direct expan- 
sion coils. The purpose of the brine tank is to store 
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Fig. 37}44—Insulated Ice House Joined to Refrigerator. - From Bulletin 41, 
Minn, Dairy & Food Commission. 
cold to be drawn upon when the machinery is not 
running. The tank should be located near the ceiling 
where it will serve practically the same purpose as an 
overhead ice box. See page 297. 
Storage Rooms Cooled With Ice. In small dairy 
plants not provided with mechanical refrigerating ma- 
chinery, a refrigerator or cold storage with an ice cham- 
ber at one end is commonly used. The construction of 
the ice chamber is shown in Fig. 37. The ice chamber 
