12 



N. H. Agri. Experiment Station 



[Bui. 244 



TABLE IV. — (Conduded) Kilowatt Hours of Current Used and Amount of Storage 



Space Cooled. 



X Combmed with the dairy cold storage and estimated to require 1/10 of the total 



current consumed. 

 t For the months and days operated. 

 * Farna No. 4 is not included in these averages for the reason that it is not an individual 



type machine, but is in combination with the dairy cold storage room. 



The basis for an accurate judgment of comparative costs of operation 

 is the kilowatt hoiu'S per cubic foot of total box capacity consumed per 

 hour. Since continuous readings of inside and outside temperatures 

 were not made, the degree of difference in temperature is unknown. 

 These cubic foot ratings are given at the end of Table 4. A variation 

 between .0016 kwhs. and .008 kwhs. occurred. The important influence 

 of location of the refrigerator and compressor on the current consumed 

 is also brought out. 



Although the refrigerators on Farms No. 2 and 4 had the lowest cur- 

 rent consumption, neither of them is the usual household type or size. 

 The installation on Farm No. 2 is three or four times larger than the 

 ordinary house refrigerator. The other, while listed at 9 cubic feet, is 

 really a part of a 207 cubic foot dairy cold storage, and is not to be 

 compared with a household machine. On both farms the same make of 

 equipment is used with the same size of compressor. Brine tanks vary 

 in size according to the contents of the two boxes. In neither case are 

 the surrounding conditions considered better than average. 



It was assumed that .002 kwhs. per cubic foot of total box capacity 

 per hour was a reasonable charge for household requirements. This 

 represents one-tenth of the entire capacity of the dairy cold room. Of 

 the machines which represent the usual sizes of household refrigerators, 

 No. 5 consumed the least current. The cabinet has no special insula- 

 tion. This lack of protection caused the manufacturer who installed 



