To help illustrate the point, air conditioning systems on large aircraft use turbocharger-like devices to cool the air (often called air cycle machines) . By extracting heat energy, they provide a source of extremely cold air (typically colder than -30f) for use in the cabin. For obvious reasons, ice forms instantly and must be melted to avoid trouble. It's good to recognize that a pressure drop across the turbine is normal.
I'll avoid a discussion on all the principals involved with the air cycle machine. However, the turbine side works the same way as a turbocharger's turbine and extracts heat from the air source (engine or APU) by expanding it through a turbine to perform work.
As most know, anytime a gas is compressed it heats up. And anytime a gas is expanded it cools.
Under heavy load, (when the turbine is doing it's work) (there can be other times it's really hot, but not doing much work) the temperature drop becomes obvious in pictures:
I'll avoid a discussion on all the principals involved with the air cycle machine. However, the turbine side works the same way as a turbocharger's turbine and extracts heat from the air source (engine or APU) by expanding it through a turbine to perform work.
As most know, anytime a gas is compressed it heats up. And anytime a gas is expanded it cools.
Under heavy load, (when the turbine is doing it's work) (there can be other times it's really hot, but not doing much work) the temperature drop becomes obvious in pictures:
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