Explain · analogy
How a fridge keeps things cold in terms of someone bailing water out of a leaky boat
A fridge is just a bloke in a leaky boat frantically bailing out heat, only to pour it back into the ocean two seconds later.
The process relies on a refrigerant fluid acting like a bucket. As this liquid snakes through the evaporator coils inside the fridge, it absorbs thermal energy from your leftover korma, turning into a gas in the process. It is the nautical equivalent of scooping up a gallon of North Sea brine, except your bucket is also inexplicably made of sponge. The compressor then acts as the muscular arms of the sailor, squeezing that gas under immense pressure to force the heat out, because thermodynamics is essentially a very aggressive game of pass the parcel where nobody wants the parcel.
Finally, the refrigerant reaches the condenser coils at the back, where it sheds that trapped warmth into your kitchen, turning back into a liquid to start the cycle again. This is why the area behind your fridge is always inexplicably warm, like a radiator designed by someone who hates efficiency. The sailor dumps the bucket over the gunwale, the water slips back in through the holes, and the cycle continues until you eventually give up and buy a takeaway. It is the most tiring way to keep a pint of milk chilly, yet we treat it as an essential piece of kitchen furniture rather than a cry for help.
Where the analogy breaks downThe boat does not need an external power supply to keep the bailing mechanism moving.