Steam ejector design
Steam ejector design
(OP)
Good afternoon,
I am now trying to calculate a steam ejector for vacuum production.
Does anyone have some suggestions about where (how) to start or a spreadsheet already done for an application like this?
Thank you very much in advance.
I am now trying to calculate a steam ejector for vacuum production.
Does anyone have some suggestions about where (how) to start or a spreadsheet already done for an application like this?
Thank you very much in advance.





RE: Steam ejector design
rmw
RE: Steam ejector design
RE: Steam ejector design
Heat Exchange Institute, Inc., "Standards for Steam Jet Vacuum Systems," October 2000. Heat Exchange Institute Inc,, 1300 Sumner Avenue, Cleveland, OH 44115-2851
HTH
RE: Steam ejector design
I2I
RE: Steam ejector design
Katmar Software
Engineering & Risk Analysis Software
http://katmarsoftware.com
RE: Steam ejector design
RE: Steam ejector design
also GEA have published curves and charts for a rough sizing:
http://www
and more manufacturers are listed in vacuum-guide:
h
Hope it helps,
Anne
RE: Steam ejector design
But I'm still curious about one thing: everything I see in my searches is empirical or semi-empirical.
Does anyone know exactly (sizing equations) what's "behind" a jet pump?
For me, conceptually talking, everything makes sense (Venturi effect).
Mathematically the things don't seem to be very clear for anyone...
Nice weekend for all of you!
RE: Steam ejector design
Over the years they have done enough tests that they can exptrapolate from those that they have tested so they rarely have to verify by testing these days, but they have the labs and test stands to do so if needs be.
rmw
RE: Steam ejector design
RE: Steam ejector design
1. Hans Peter Schlag
Experimentelle und theoretische Untersuchungen zur Berechnung der Kennlinien von gasbetriebenen Einphaseninjektoren und Gutaufgabe Injektoren
VDI Verlag 1993
Reihe 3: Verfahrenstechnik Nr 313
2 Uwe Wagenknecht
Untersuchun der Stroemungsverhaeltnisse und des Druckverlaufes in Gas/Feststoff-Injektoren
Dissertation
UB/TIB Hannover 105 585 165
3.Werner Hutt
Untersuchun der Stroemungsvorgaenge und Ermittlung von Kennlinien an Gutaufgabe Injektoren zur pneumatischen Foerderung
Dissertation Universitaet Stuttgart RA 4212(84) 1983
UB/TIB Hannover 118 842 161
4. Th. Messing
Dampfstrahlverdichter als Waermepumpen
Chem-Ing.-Techn 30 Jahrg. 1958 Nr9 p 589-592
5. Oak Ridge national laboratory
Martin Marietta Energy Systems Inc
C.T.Hsu
Investigation of an Ejector Heat Pump by Analytical Methods
ORNL/con 144 Dist Category UC 95-d 1984
5. VDI Forschungsheft 479 Ausgabe B Band 26 1960
R.Jung
Die Berechnung und Anwendung der Strahlgeblaese
This source has been translated to English
6. A K Jeelani, A Rajkumar, K V Kasipathi Rao
Designing Air Jet Ejectors
Chemical engineering september 25 1976 p135
6. S A K Jeelani,K V Kasipathi Rao, G R Balasubramanian
Designing Steam Jet Ejectors
Chemical engineering April 9 1979
7. H J Henzler
Das Sogverhalten von Strahlsaugern fuer das Stoffsystem fluessig-gasfoermig
Verfahrenstechnik 15 (1981) Nr10 p 738-749
RE: Steam ejector design
Thanks
I_mak
RE: Steam ejector design
You can also get wet steam into an ejector and this will cause "back firing" on the ejector also putting material back into process.
RE: Steam ejector design
I_mak
RE: Steam ejector design
If the steam can't leave the jet at the design velocities, it ceases to be a jet and just becomes a dumb piece of pipe. Imak has stated well what happens to steam flowing in pipes.
rmw