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The Joule-Thomson effect

๐—ง๐—ต๐—ฒ ๐—๐—ผ๐˜‚๐—น๐—ฒ-๐—ง๐—ต๐—ผ๐—บson ๐—ฒ๐—ณ๐—ณ๐—ฒ๐—ฐ๐˜ ๐—ฎ๐—ป๐—ฑ ๐˜๐—ต๐—ฒ ๐—ถ๐—บ๐—ฝ๐—ฎ๐—ฐ๐˜ ๐—ผ๐—ป ๐—ต๐˜†๐—ฑ๐—ฟ๐—ผ๐—ด๐—ฒ๐—ป ๐˜€๐˜๐—ผ๐—ฟ๐—ฎ๐—ด๐—ฒ

๐˜ž๐˜ฐ๐˜ณ๐˜ฌ๐˜ช๐˜ฏ๐˜จ ๐˜ถ๐˜ฏ๐˜ฅ๐˜ฆ๐˜ณ ๐˜ฉ๐˜ช๐˜จ๐˜ฉ ๐˜ฑ๐˜ณ๐˜ฆ๐˜ด๐˜ด๐˜ถ๐˜ณ๐˜ฆ.

An important phenomenon we take into account is the (๐—ป๐—ฒ๐—ด๐—ฎ๐˜๐—ถ๐˜ƒ๐—ฒ) ๐—๐—ผ๐˜‚๐—น๐—ฒ-๐—ง๐—ต๐—ผ๐—บ๐˜€๐—ผ๐—ป ๐—ฒ๐—ณ๐—ณ๐—ฒ๐—ฐ๐˜. This physical principle ๐—ฑ๐—ฒ๐˜€๐—ฐ๐—ฟ๐—ถ๐—ฏ๐—ฒ๐˜€ ๐—ต๐—ผ๐˜„ ๐—ฎ ๐—ด๐—ฎ๐˜€ ๐—ฐ๐—ผ๐—ผ๐—น๐˜€ ๐—ฑ๐—ผ๐˜„๐—ป ๐—ผ๐—ฟ ๐—ต๐—ฒ๐—ฎ๐˜๐˜€ ๐˜‚๐—ฝ during expansion.

๐Ÿ’ก Hydrogen behaves differently than most gases! ๐˜ž๐˜ฉ๐˜ฆ๐˜ณ๐˜ฆ๐˜ข๐˜ด ๐˜ฎ๐˜ฐ๐˜ด๐˜ต ๐˜จ๐˜ข๐˜ด๐˜ฆ๐˜ด ๐˜ค๐˜ฐ๐˜ฐ๐˜ญ ๐˜ฅ๐˜ฐ๐˜ธ๐˜ฏ ๐˜ถ๐˜ฑ๐˜ฐ๐˜ฏ ๐˜ฆ๐˜น๐˜ฑ๐˜ข๐˜ฏ๐˜ด๐˜ช๐˜ฐ๐˜ฏ (๐—ป๐—ฎ๐˜๐˜‚๐—ฟ๐—ฎ๐—น ๐—ด๐—ฎ๐˜€), ๐—ต๐˜†๐—ฑ๐—ฟ๐—ผ๐—ด๐—ฒ๐—ป ๐—ฎ๐—ฐ๐˜๐˜‚๐—ฎ๐—น๐—น๐˜† ๐—ต๐—ฒ๐—ฎ๐˜๐˜€ ๐˜‚๐—ฝ ๐—ฎ๐˜ ๐—ฟ๐—ผ๐—ผ๐—บ ๐˜๐—ฒ๐—บ๐—ฝ๐—ฒ๐—ฟ๐—ฎ๐˜๐˜‚๐—ฟ๐—ฒ. This has major consequences for the safety and efficiency of hydrogen systems.

When does this effect play a role?

๐Ÿ”น ๐—ฃ๐—ฟ๐—ฒ๐˜€๐˜€๐˜‚๐—ฟ๐—ฒ ๐—ฟ๐—ฒ๐—ฑ๐˜‚๐—ฐ๐˜๐—ถ๐—ผ๐—ป: In our Gas Control systems, a pressure regulator reduces the pressure of hydrogen, causing it to heat up.

๐Ÿ”น ๐—Ÿ๐—ฒ๐—ฎ๐—ธ๐—ฎ๐—ด๐—ฒ๐˜€: In the event of a leak from a high-pressure line, hydrogen expands suddenly, which can cause temperature fluctuations and safety risks.

๐Ÿ”น ๐—™๐˜‚๐—ฒ๐—น๐—ถ๐—ป๐—ด ๐˜€๐˜๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐˜€ & ๐—ณ๐—ถ๐—น๐—น๐—ถ๐—ป๐—ด ๐—ถ๐—ป๐˜€๐˜๐—ฎ๐—น๐—น๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐˜€: During refueling, hydrogen flows rapidly into a vehicle cylinder. Without cooled hydrogen (-40 ๐˜‹๐˜Œ๐˜Ž๐˜™๐˜Œ๐˜Œ๐˜š), this can lead to overheating of the tank.

At Watermeln ๐Ÿ‰ โšก, we design our systems with these effects in mind, so we guarantee maximum safety and performance. ๐Ÿš€