Steam turbine back pressure

[barbara]

Hi all

I need to know the efficiency of steam turbine (<20 kW).
Anyone can help me?

thk in advance!!!!

Barbara

[josefreitas]

Use the ASME PTC 6.

[aragorn]

thanks

[muhammad usman]

plz upload asme ptc6.0. thanks.

[josefreitas]

Please send un email to jose_manuel_freitas@yahoo.com

[Sivaguru]

it is 95 %

[josefreitas]

i have order one Siemens ST: 46,5 ton/h of steam, 420ºC, 46 bar , vacumm pressure= 83 mbara, Output= 11500 kW.
you can calculate the efficiency

[josefreitas]

i have order one Siemens ST: 46,5 ton/h of steam, 420&#186;C, 46 bar , vacumm pressure= 83 mbara, Output= 11500 kW.
you can calculate the efficiency

[HCTOR]

Efficiency is about 0.8 from isoentropic evolution but depends of the turbine.

[noelni]

This sounds like a very small steam turbine ("<20 kW"). For such a small steam turbine, the isentropic efficiency would be in the range of 50%-55%. Allow another 2-5% for mechanical loss and 3-5% for generator loss (assuming the STG is driving a generator, and not a mechanical drive).