Can one cool air with a bicycle pump? Answered
Here is the thing.
I'm going on a 5 day trip and I'm taking a cool box with me.
A cool box will only stay cold for half a day with ice in it.
Compressed gas becomes cold when it expands, but buying cans of whatever gas and releasing them in the box is wasteful and expensive.
Air out of the bicycle pump is kind of cold, but not near cold enough.
How can I decrease the temperature coming out of the nozzle ?
Or does someone have a better idea on how to turn muscle power into cool drinks.