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How Does a Refrigerator Work?

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1. How does an upside down refrigerator work?
   Since there are many "upside down" (ie freezer at the bottom and fridge at the top) refrigerators out there now, I am wondering how do they actually work in principle because from what we learn in physics, the freezer has to be at the top in order for the freon to melt and absorb heat. (if I am not mistaken)

   But how does this principle hold once the refrigerator freezer position is reversed?

   

   dayalan86

   11 Mar 10 at 8:15 pm
2. You can build refrigerators any which way you want. The refrigerant is pumped through the device actively by the compressor and there are absolutely no principle in physics that would prevent the arbitrary location of the cold and the warm section.

   In any case, the cold compartments are both on the cold section of the fridge while in modern low energy designs the condenser is just a flat metal plate on the back, rather than the finned assembly found in older models. This is possible due to the much better insulation and more efficient compressors.

   I just bought a new one and was very surprised how cold it stays in the back, but then, the average power consumption is only 50W, which is totally negligible for a device this size.
   References :

   

   amansscientiae

   12 Mar 10 at 1:17 am

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