Power generation from top-in-turbine

First, I don't think you mean top-in-turbine, I think what you mean is a topping turbine. This is a turbine that runs off the medium pressure steam off an extraction from a larger turbine. The topping turbine further reduces the steam pressure typically either by generating electricity or by driving a piece of mechanical equipment like a fan or a compressor. The exhaust off the topping turbine is then low pressure and maybe used for space heating or other purposes. In paper mills this steam is used for dryer rolls for instance.

Here is a nice article with calculations on how to evaluate such a cycle.

http://www.energypubs.com/index.cfm?pageid=108&c2e=236&e2e=0&rs=0&artid=1328&displaytype=current&CFID=497337&CFTOKEN=dfae51469287ea12-2496810A-802E-DEA7-9DFC46FD1B3BAF0D

Thanks for your prompt response and guiding to the exact location.However i would revert after going through the article.

Reagards,

PS Rao

Dear Vasu,

If you know the stage efficiency of the turbine the calculation is based on enthalpy difference and conversion factor of heat energy to power ( 1 Kw - 860 Kcal ). I hope you could do it further.