Why is it necessary to Defrost the Refrigerator?

Why is it necessary to Defrost the Refrigerator?//
At first, this video discusses about the necessary condition behind the Frost formation inside the Refrigerator and that is -:
1. The Evaporator temperature must be below the Dew Point Temperature of Air coming in contact with the Evaporator within the Refrigerator.
2. The Evaporator temperature must be below the Freezing temperature of water at atmospheric pressure that is 0 degree Centigrade.
Later this Video talks about the reasons behind this Frost formation which are -:
1. Moisture migration from the stored food products.
2. Periodic door openings.
3. Door gasket leakage.
At last the effects of Frost formation on the performance of Refrigerator is discussed and that is, it basically decreases the Coefficient of Performance (COP) of Refrigerator.
Thus, Refrigerators must be periodically Defrosted in order to maintain acceptable COP.
#Refrigerator #Frosting #engineering_bits
Video Location : Mahindra Institute, Kunwar Singh Colony, Chas (A huge respect & thanks to Mr. Mukesh Sir, Director of Mahindra Institute for his appreciation & support)
Videography Credit : Nishant Chaudhary
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[@khadeejaparveen1919]

👍

[@rahulkumar6570]

Please tell me the difference between water vapor and steam

[@basics1729]

When you boil the water in a pressure cooker, the water turns to steam inside the pressure cooker. When the steam escapes out the top vent, it looses pressure and turns to vapor, which is what you see. Because we cannot see steam, it is colourless and odourless. Steam is substantially away from the saturated vapor point in gaseous phase while water vapor is nearer to saturated vapor phase therefore tiny condensed water droplets is visible.