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Valeria,
Thanks for the additional information. I'm afraid I am not aware
of such a component but I will certainly put it on our list of
components that would be interesting to write. If you find (or
already have) any papers that discuss the dynamics and performance
of steam ejectors, I'd certainly be interested in reading them.
kind regards,
David
On 11/22/2019 07:27, Valeria
Badalamenti wrote:
Hi,
Thanks
for your help.
I
need to model an duble stade ejector that uses steam as a
motor fluid and sucks air without moving parts.
The
ejector works continuously and no, it is not necessary to
simulate the vacuum chamber.
My
aim is to understand what happens if the flow rate of the
incoming steam varies and the conditions of the outgoing
steam.
Process
data are:
Inlet
Air flow rate: 300 m3/h
Aspiration
pressure : 80 mbar
Inlet
Steam pressure: 11 bar assoluti
Inlet
Steam flow rate at 1° stade: 330 kg/h
Portata
al secondo o stadio: Inlet Steam
flow rate at 2° stade: 1.500
kg/h
Cooling
water (only condensate recovery function): 70 m3/h
tube
fouling factor: 0.0003 (m2×h×°C)/kcal
I have no other
information, I contacted the supplier but I am waiting.
I have not come across a steam ejector model but the
device does not seem to be all that complex. I suspect
that a model could be written. Could you give me a bit
more information about what you are trying to model? For
instance, do you also need to model the vacuum chamber? Do
you just care about the conditions of the steam that would
come out of the ejector? Is the vacuum pumped continuously
by the ejector or is the ejector only used periodically?
kind regards,
David
On 10/21/2019 06:18, Valeria Badalamenti via
TRNSYS-users wrote:
Hi,
i need to model a steam ejector to suction air and
make vacuum.
Is there a type? which types can i use to simulate
this object?