3 replies to this topic

[David Sugiman]

Dear all,

May I ask whether anyone has experience with non condensing turbine?

I actually would like to study feasibility of installing non condensing turbine to be installed at my plant steam letdown system. My purpose is basically to recover some amount of energy that otherwise will cause my lower grade steam to be superheated. Instead of installing desuperheater, I thought it might be better to just install non condensing turbine.

As of now, I still do not have any good manufacturer in my mind that manufacture good non condensing turbine for this application. If possible, can anyone recommend me?

Thanks a lot.

Best regards,
David

[Andrei]

Yes, I used in some of my projects noncondensing steam turbines, or backpressure turbines how others are calling them. The high pressure steam was driving a rotating machine like a compressor or pump, and the resulted low pressure steam was used as heat medium in a reboiler for example.
I worked with Siemens and MAN Turbomachinery, but there are other manufacturers.
I found very useful in my innitial calculations a free soft from Katmar Software:
http://www.katmarsof...com/turbine.htm

Good Luck

[David Sugiman]

Dear Andrei,

Thanks a lot for your very useful information!

Best regards,
David

[Rama]

Dear David,

It is a perfectly feasible and efficient solution. The idea is to use the “Total Energy” of the fuel. In fact where I was working (an integrated inorganic chemicals manufacturer.), we were generating steam at 1550 psig, running a “Topping” turbine with it to generate about 12 MW, (two such) and discharging the steam at 450 psig.

At this pressure, we were using the steam to run (back pressure) turbine driven gas compressors, Product Calciners and the balance to run a back pressure turbine, with bleed offs to generate further power. The bleed offs were at 50 and 20 psig. None of the turbines were condensing types. We did have a condensing turbine to balance the system at times but after we managed to balance the steam / power requirements, we were able to avoid using the condensing turbine. It helps if you are able to supply any excess power to the grid.

The 50 and 20 psig streams were used for the process. The waste steam was used in a multi stage evaporator to generate water from sea water for our boilers.

There are several manufacturers of steam turbines whom you can ‘Google’ out. We were using Turbines from Siemens (Germany), BHEL (India), Borsig (Germany). There are several others depending on your capacity requirement like, MAN, IHI (Japan), AEG, GE, Skoda (Czech), Triveni (for smaller turbines up to 18 MW) etc.

Trust this answers your doubts. You should definitely go ahead and look for a back pressure Turbine and a Higher pressure boiler if possible – especially if you are at the drawing board for a new Project.

All the best.