Quote:
Originally Posted by RebelR
Ever feel a bbq tank as you are grilling and wonder why it's freezing in the middle of summer? The liquid propane absorbs heat as it vaporizes. AC works the same way. A compressor condenses a refrigerant gas into a liquid, as it turns back into a gas it absorbs heat and cools the air passing through it
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Nice example. Was learning about propane refrigerators recently, was curious how they work since they cool by burning propane. The system is clever, the propane flame heats up liquid ammonia in a closed tube system, the ammonia turns to gas and rises up through the tubes, absorbing the heat out of the refer.