מסנן גז אידאלי עם מעריך יחיד לחץ מוחלט
מחשבון מסנן נפח גז של מצטברocumented
מחשבון הנפח האידאלי של הגז המאומת והמצבים של הגז עבור מחזור מספק אחד של מסירה של נוזל. כל שלושת לחצי הלחץ חייבים להיות מוחלטים ומשויכים לטמפרטורה על בסיס החישוב שנבחר.
תוצאה של מסננת גז אידאליocumented
מודל מעריך יחיד מומש
V1 = V0(p0/p1)^(1/n)
V2 = V0(p0/p2)^(1/n)
ΔV = V1−V2
V0 = ΔV / [(p0/p1)^(1/n) − (p0/p2)^(1/n)]
רק יחסות לחצים מופיעות, אך כל לחץ חייב להיות מוחלט. ערך מדד לחץ צריך להישתנות ראשית עם לחץ אטמוספרי/משnek מocumented באותה יחידה. הדף לעולם לא מניח ש-bar(g) שווה ל-bar(a) או שההפרש האטמוספרי קבוע נכון לכל אתר/משnek.
Process exponent and temperature
Isothermal operation uses n=1. A polytropic value, including 1.4 for a justified rapid nitrogen idealization, must be entered with its product/cycle source. This page does not decide n from an arbitrary time threshold and does not apply precharge-temperature or real-gas corrections.
Manufacturer reference and published example
ה HYDAC accumulator catalogue publishes the same ideal-gas equation, distinguishes isothermal/polytropic/adiabatic cases, requires temperature and real-gas corrections, and gives an example with p0=1245 psi, p1=1500 psi, p2=3000 psi, ΔV=1.35 US gal and n=1.4. The displayed equation gives V0=3.949314 US gal, reproducing the catalogue’s rounded ideal result of 3.95 US gal before its 1.16 real-gas correction and nominal-size selection. The Parker HY10-1630/US sizing guide explicitly defines its sizing pressures in PSIA, uses application/time/temperature-dependent gas coefficients and warns that temperature variation affects precharge.
גבול תקן
ISO 4413:2010, edition 3, Published and confirmed in 2021, specifies general rules and safety requirements for hydraulic systems. Its public abstract does not establish this sizing equation, exponent or precharge percentage; this page therefore does not call the arithmetic an ISO formula or claim ISO 4413 compliance. The inventory token “ISO 70” was a false positive caused by a former numeric preset beginning with 70, not a cited standard.
מדוע שונה הדף הקודם
The former inputs were merely labelled “bar,” inviting gauge-pressure entry into an absolute-pressure gas law. It silently chose n=1 or 1.4 from broad speed labels, published unsupported one-minute thresholds and universal 90/95% precharge rules, inserted presets/defaults and labelled the ideal V0 as the required accumulator volume without real-gas, temperature, product or reserve corrections.
Stored-energy hazard: this result is not authorization to select, charge, isolate or service an accumulator. Follow the exact manufacturer procedure and applicable law/standard. Parker’s guide states that accumulator circuits should automatically unload stored pressure when machinery shuts down. Verify rated pressure/temperature, compatible gas and elastomers, isolation, relief, discharge control, inspection and trained-personnel requirements.
