Mixing of Different Pressure And Temperature steam

[powerplant08]

I just want to know if there is some reliable system where a low pressure saturated steam (enthalpy-H1 AT p1,t1)can be mixed with high pressure superheated steam (enthalpy H2 at p2,t2)which should result into the the superheated steam (enthalpy-H3 at p2,t3) with same pessure with incresed flow,may be temperature of superheted steam can be lower a bit.in other words

m1H1 @p1,t1 +m2H2 @p2,t2=(m1+m2)H3 @p2,t3

is that possible by some system.if yes how.
thank you

 

[rmw]

You can only do it if you have an intermediate pressure that you can take both steam streams to, and even then there are limitations.

This is done with a thermocompressor, where a venturi device like a jet, but non critical is used as a compressor, with the high pressure steam being the motive, and it "compresses" the lower pressure steam up to an intermediate pressure.

Go to

http://www.graham-mfg.com

There are others, but they come to mind right off.

Other wise, you would have to use a mechanical vapor compression device, which is a rotating piece of machinery, but, possibly limited, based upon you starting and ending points, (with respect to the physical limitations of the compressor housings).

rmw

 

[GenB]

Hello,
Saturated steam is already used to desuperheat, by using the saturated steam to atomize the water used for desuperheating, so there is your answer.

ER

 

[chicopee]

I think what you may be looking for is called a mixing box!!

 

[quark]

RMW is right. You can't have high pressure mixture. It should be some intermediate pressure, otherwise mixing is not possible. (high pre. steam will obstruct low pre. steam to flow). Temperature of the mixture will be low and it depends upon the dryness fraction of saturated steam and flow rates of both streams.

Graham has a software(free) that calculates thermocompressor details but the size and parameters are limited.

Regards,


Eng-Tips.com : Solving your problems before you get them.