8 replies to this topic

[abantikag]

Can anybody tell me how to select inlet pressure of a steam turbine..steam turbine is generating 210 mw power....

[Napo]

Dear Abantikag,

You can review the GPSA, Engineering Data Book, section Prime Movers, for to find a procedure.

 

Maybe you need a steam at 150 kgf/cm2 (565ºC, with intermediate reheating).

 

Napo.

[abantikag]

Can u please tell me the name of any reference book

[Napo]

Dear Abantikag,

 

The Engineering Data Book is a Handbook, published by GPSA (Gas Processors and Suppliers Association).

 

Napo.

[breizh]

https://www5.eere.en...e?random=Outlet

 

 

Consider this resource to support your work and perform calculation.

 

Breizh

[shan]

If you have no limited condition for your steam generators (boilers), you may select steam pressure and temperature as high as you can to get more efficiency (kg steam/kw) from your generator.

[abantikag]

Dear Napo

 

I have gone through 'Prime mover ' section of Engineering Handbook .But i could not find any topic which explains the procedure to select turbine inlet pressure if power output from a turbine is given.

 

abantikag

[thorium90]

Hi,

 

I agree with shan. Typically, you try your best to get the highest pressure and temperatures of steam from the steam generator, then buy a turbine that can do the job. Not the other way around...

 

Let me elaborate. For example, you have some hot waste gas that is of a certain flowrate and temperature. If this waste gas is 400C, then your steam temperature could never be higher than that. Therefore, the maximum amount of steam you can get is really dependent on where your heat comes from. From here, you calculate the best steam conditions you can get and select a turbine that can produce the power.

 

As Napo pointed out, one common pressure temperature combination is about 565C and 150Bar. Sounds like a triple pressure with reheat steam generator combination. Its a nice guideline to start with, but bear in mind, the temperatures and pressures you get is dependent on the source of heat, not on the steam turbine.

Edited by thorium90, 27 March 2015 - 12:13 AM.

[Napo]

Dear Abantikag,

 

The procedure is in the GPSA Engineering Data Book, but you need to choose the steam conditions, the following recommendations can you help:

 

- Branan C., Rules of Thumb for Chemical Engineers, 5th. Edition, Boiler Chapter (9), Power Plant, p. 168.

 

- Kuppuraj K., Quickly estimate steam turbine power, Chemical Engineering, Dec (7), 1987. The same article in Calculation&Shortcut DESKBOOK, by Chemical Engineering, p. 126-128. Almost the same information in McKetta J., Encyclopedia of Chemical Processing and Design, Vol. 54, p. 139.

 

- Evans F., Equipment Design Handbook for Refineries and Chemical Plants, Vol. 1, Drivers Chapter (1), p. 15 to 23.

 

Regards,

 

Napo.