Quote:
Originally Posted by yash101
That makes sense because when you compress gasses (and solids/liquids), each molecule has heat. When there are a ton of molecules in one place, the heat adds up until it is unbelievably high. Entropy takes away most of the heat via the heat sink. However, active cooling is something that can just almost always aid in passive cooling! The motor will typically be a quite efficient one that shouldn't get too hot. The problems start occurring when the motor is so close to the piston that the heat is moved to the [cooler] motor because of entropy. This is similar to what happens in the air conditioner. The gas is compressed, taking away the heat. that way, in the condensor, it is decompressed, leaving you with supercooled gas to cool the air using!
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As long the the compressor manufactures used proper high temperature bearings, any heat transfer between the head, piston rod and eccentric bearing is negligible. The failure mode for most compressors is either the cup (part that glides and seals between the piston and the piston sleeve) wearing prematurely due to heat, or the sleeve flaking due to being overheated which damages the cup.
It is worth to note, that with someone who knows what they are doing, these parts are easy to replace.