18 



N. H. Agri. Experiment Station 



[Bui. 244 



In the case of No. 6, however, the compressor and the back of the refrig- 

 erator projected into an entry which fluctuated in temperature according 

 to the weather. The sides, front, top and bottom were exposed to the 

 house temperature. The effect of the outside temperature changes on 

 the exposed parts of the equipment is clearly indicated in the curve. In 

 the cool months less current was consumed, and in the wann months a 

 greater consumption occurred. Although the main part of the house is 

 brick, the kitchen ell is of wood. 



This situation gave a maximum of service at a minimum of cost. 

 While these exact conditions could hardly be duplicated, the importance 

 of giving careful attention to location is illustrated. The compressor 

 unit, particularly, should be located where the heat from the refrigerator 

 can be discharged into cool air. 



The average kilowatt hours of current per month were 40 and 33 in 

 these two cases. 



CURRENT CONSUMPTION PER CUBIC FOOT PER HOUR 



Table 7 shows the kilowatt hours of current which were consumed 

 per cubic foot of total contents and storage contents per hour. The 

 table also shows the approximate percent of the total elapsed time that 

 the machine unit operated. Tests to determine the demand of each 

 motor were not made ; a demand of 320 watts was assumed in each case, 

 except on Farm No. 4, where the same figures were used as for the dairy 

 cooling room. (See University of New Hampshire Experiment Station 

 Bulletin No. 233) . This also accounts for the unusually high figure on 

 Farm No. 7 where 225 watts were assumed to have been used. 



The refrigerators on Farms 1 and 6, it will be recalled, were operated 

 12 months of the year and show a generally higher consumption per 

 cubic foot than the others which were operated only during the warm 



TABLE VII. — Kilowatt Hours of Current Consumed per Cubic Foot per Hour. 



* Does not include refrigerator on Farm No. 4. 



