March, 1928] 



Electric Dairy Cold Storage 



STANDARD DATA 



Machine: Manufacturer's name and trade name furnished on re- 

 quest. 



Indirect expansion (brine tank) , air-cooled, double cylinder 

 reciprocating, gear-driven compressor using methyl chlo- 

 ride as a refrigerant. 



Size: (a) Motor, 110 volts, 60 cycle, 1750 R.P.M., Type R.S. 



(b) Rated equivalent to 250 lbs. or % ton of ice in 24 

 hours at 4 lbs. gas back pressure. Against 10 lbs. back 

 pressure has been found to have more than 33V(}% greater 

 capacity. 



Table 2 — Investment in eqvijnneni and annual fixed charges for electric refrigeration on 



three farms. 



*Actuany the electric refrigeration unit on Farm No. 2 was secured on a rental basis 

 requiring an initial investment of $225 with the privilege of later purchase. In this way 

 the initial out-of-pocket expense was about one half that required of the others, but the 

 farm operator does not own the equipment which may be a disadvantage. This method 

 has been discontinued by the manufacturer, and the installed value has been used in 

 the table. 



tServicing frrnished on Farm No. 2 by company on rental basis. The labor of at- 

 tendance is reported as being too small to attach any value to. This almost complete 

 elimination of labor is one of the oustanding features of the electrical method. 



