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5. Energy aspects of vacuum bagging
In a positive-displacement vacuum pump (compression by volume reduction), a thermodynamic cycle is described, and compression can only be achieved by expending mechanical energy.
Putting things at their best and assuming that compression is isothermal, the power P required to compress, from suction pressure p
a
to discharge pressure p
r
a gas flow of volume flow S is given by the formula :
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Energy aspects of vacuum bagging
Vacuum pump oils
References
In Engineering Techniques
Standardization
The main standards currently in use are those of Pneurop, an association of compressor, vacuum pump and compressed air tool manufacturers formed by twelve European countries.
Most of them are adopted by the Association Française de Normalisation AFNOR.
Vocabulary
- Technique du vide. Vocabulaire. Pompes à vide. - NF X 10-501 - 5-76
Volume flow measurement
- Technique...
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