Julian,  there are several parameters to consider.  Most of them will be set by the desired purpose of the turbine (electricity production, driving motors, process steam).   These can include,

  - Pressure of steam to be produced

  - Control system for the turbine

  -  Number of stages required

 -   Safety systems, (overspeed, vibration, casing protection etc)

other parameters like the quantity of steam production required, will also impact the overall consideration for what you get.

Thanks for your comments Dave. I forgot that. I'm sorry, I made a mistake. The steam turbine is for purposes of power generation. 

Dear Gallego,

I suggest you to take a look over the the websites of the manufacturer and eye the turbine catalogs. "Next Generation KA24/GT24: Technical paper - Alstom".

Regards!

Azd

http://www.alstom.com/products-services/product-catalogue/power-generation/gas-power/gas-turbines/gt24-gt26-gas-turbines/

Dear Julian,

The key factors in order to select the parameters of  thesteam turbines are:

1. The purpose of the turbine: electricity generation, cogeneration, powering pumps, compressors or propellers;

2. The source of the steam: conventional steam boiler, nuclear steam generator, heat recovery boiler, geothermal, etc;

3. The nominal (rated) power [MW];

4. The cooling water or air source;

5. Manufactural design patterns (impulse, reaction, combined, axial, radial, etc.)

In my oppinion is essential to precise what you want to do with this turbine. Please give us more details about.

Good luck,

Gabriel

The following information may be useful for your research

1) Range of power in MW

www.energy.siemens.com/hq/en/fossil-power-generation/steam-turbines/

2) Type of the turbine like Back Pressure Controlled Extraction,Back Pressure Un-controlled Extraction,Straight Backpressure,Controlled Extraction Condensing,Straight Condensing with bleed  and ,Straight Condensing

www.triveniturbines.com/en/products/...turbine/selection-criteria.html

3) Pressure and temperature of main steam

4) Tempeature range of reheat steam

5)Details of Exhaust areas 

www.energy.siemens.com/hq/en/fossil-power-generation/steam-turbines/

6) Type of energy available that is imulse turbine or reaction turbine

7) Type of compounding adopted that is pressure compounding, velosity compounding and pressure-velosity compouning

You can also refer

Power generation hand book; Selection and hand book

accessengineeringlibrary.com/.../power-generation-handbook-selection-

Hello everyone,

First of all, thank you very much for your comments. Second, I'm sorry for my delay, something is happening with the internet service at my home. I posted my comments a couple days ago but it seems nothing happened. Then, I made the question because my country has some projects about power generation. In spite of a large part of electricity generated here is by hydroelectricity power stations, the government scarcely invest in renewable energies. Only 1.1% of power generation here is by means renewable sources. Therefore, I am trying to have a vision and compare this project which is called Hydrosogamoso with a solar panel project and thermal power station. In the case of my question, I needed further information about the thermal station. The solar project is easy to compare but I am gathering more information. Thanks again for helping to me all of you.

I'm gathering the information for comparing costs, environmental impacts and technologies. 

Dear Julian

The key factors in order to select the parameters of  the steam turbines are:

1. The purpose of the turbine and where it will be used: electricity generation, cogeneration, powering pumps, compressors or propellers;

2. The source of the steam: conventional steam boiler, nuclear steam generator, heat recovery boiler, geothermal, etc;

3. The nominal (rated) power [MW];

4. The cooling water or air source;