: How does coolant work in an automobile or air-condition or in machines?

Question

And also why can’t we use nitrogen instead of coolants ?

In: Chemistry

Answer 1

Coolants absorb heat from these types of machines to keep them cool. Then the warmer coolant can carry the heat away to a cooler area. When it hits the cooler area, the heat will leave the coolant. You can then cycle the coolant back to the hot area to repeat.

Liquid nitrogen is sometimes used as a coolant or refrigerant in small scale. But it’s unstable at room temperature because it’s going from liquid to gas, which would cause expansion issues in a line trying to absorb heat. It would require extra insulation, an extremely low ambient temperature to keep it in liquid form, and would cost more, which is not super useful in most circumstances.