What temperature range does the air drop to as it passes through the expansion turbine?

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As the air passes through the expansion turbine, it undergoes a significant decrease in temperature due to the Joule-Thomson effect, where a gas cools as it expands. In this case, the temperature of the air can drop to a range of -20 to -30 degrees Celsius. This cooling effect is critical in various applications, particularly in the fields of aviation and refrigeration, where controlling the temperature of the air is essential for efficient operation and performance.

The specified temperature range reflects typical conditions observed in expansion turbines, highlighting their role in managing thermal dynamics during air compression and expansion cycles. Understanding this temperature change is vital for aircrewmen, as it affects engine performance and the overall efficiency of systems that rely on air compression and expansion.