HOME REFRIGERATION 



Table 1. Effects of Load and Door Openings on Refrigerator 

 Humidities at 41°F. 



Load and Door 

 Openings 



Relative Humidity, percent 



Refrigerator Refrigerator 

 No. 1 No. 2 



Cabinet Unloaded 



Doors closed 



Doors opened* 



Cabinet Loaded 



Doors opened* 



*Opened 25 times a day. 



80 



Effect of Door Openings on Temperature and Relative Humidity 



As shown in Table 1 door openings caused a 10 percent increase in the relative 

 humidities within the refrigerators. 



Both refrigerators maintained a fairly constant temperature (within 1°F.) 

 when left at rest. However, the door openings had a marked effect on the tem- 

 perature of the cabinets, due to the denser cold air flowing out and being replaced 

 by warmer air from the room. The rise in temperature was governed by the 

 number of door openings made, their duration, and their frequency. 



Figure 2, taken from typical temperature charts, illustrates the effect of door 

 openings on the cabinet temperature. The normal operating temperature of a 



80 



70 



-p 60 



50 



40 



30 



10 



20 



60 



30 40 50 

 Time (Hour^) 



Figure 2. Effect of Door Openings on Refrigerator Temperature. 



70 



60 



