FAQ-L.5: Vad betyder läckagehastighetsenheten mbar l/s och hur kan den omräknas till andra enheter?

Om gastrycket i en volym på 1 liter sjunker med 1 mbar inom 1 s, motsvarar detta en läckagehastighet (gasutflöde) på 1 mbar l/s. Enheten mbar l/s är relativt svår att föreställa sig, men används vanligtvis tillsammans med enheter som Pa m m³/s, Torr l/s eller atm cc/s inom vakuumtekniken.

Angivelsen blir lättare att förstå om förlustmängden anges i andra enheter. Inom luftkonditioneringstekniken används till exempel enheter som g/a eller oz/y. För angivelse av läckageförluster i tryckluftssystem har enheten l/min blivit den vanligaste.

Exempel på enhetsomräkning (vid Δp = 1 013,25 mbar, 273,15 K eller 0 °C, medium: luft):

10⁰ mbar l/s	≙ 1 mbar l/s ≙ 10⁻¹ Pa m³/s ≙ 1 cm³/s (≙ 1 cm³ luft strömmar genom en läcka på 1 sekund)
10⁻² mbar l/s	≙ 0,01 mbar l/s ≙ 10⁻³ Pa m³/s ≙ 610⁻¹ ml/min ≙ 610⁻⁴ l/min ≙ 4,310⁻⁵ kg/h ≙ 3,7510⁺² g/a

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