Steam Turbine Power Calculation

I used to be on Royal Navy steamships, the tiny turbines were the main power turbines that produced about 80% odd of the total power to the props, the huge turbine near it used the exhausted steam from the main turbine to produce the last 20%.....

Therefore going by size alone, you are going to have problems!! I would say you need the original specs from the manufacturer to be safe.

Do also remember that steam turbines are not really for amateurs. For example they need to be slowly warmed up with steam before use (6-12 hours), they need to be constantly turned when hot (but not actually running) to stop shaft sag, they need many hours of cooling off too before the electric motor can be turned off.....which is why modern ships are all diesel or Gas turbine!!!

Also high pressure steam leaks have killed a lot of people and injured dozens more! A small (any) leak is completely invisible and can cut your hand off...or worse. We used a piece of paper in a slit on the end of a long piece of wood to find leaks, it just would burst into flames when near to the leak!!!!!

Be carefull!

Some of the worlds largest and most powerful ships are nuclear i.e Aircraft carriers, Ice breakers and Submarines presumably these use steam turbines but no doubt maintainence is well organised and the military are good at hushing up the results of accidents.

Steam turbines need to be used on Nuclear Vessels and of course a lot of power stations around the world. What I was stressing was that if you need to ask people on CR4 about a steam turbine, you should leave them severly alone, only for the trained professionals.....

The time to get a steam ship ready for sea is quite long, therefore in my time, some vessels would have gas turbines to get themselves moving in minutes and allow them to be moving while the steam system was brought upto pressure and usage....

Fuel economy was not a strong point of steam either I believe...

Diesels are better in this aspect, just probably not fast enough for a lot of warships!

I did once have the honour to serve on a diesel frigate (HMS Puma), she could steam(?) 15,000 miles on one fueling!! But not that fast though!

You pays your money and you makes your choice!

please sent to me steam turbine power calculation formulas and also my mail vannanplant_eng@yahoo.co.in

I was surprised to read the thermal efficiency or large diesel's I understand that 55% can be achieved.

THIS SITE MAY HELP YOU

BRANSON

http://www.taftan.com/xl/sturbine.htm

dear sir i have the calculation of steam turbine

Kindly share with us, and we will keep you posted on the developments

Mahmood Khan

would you please share with me steam turbine calculations

Dear Mr. Khanturbo

The correct and straight answer for your question is NO. We cannot estimate the power rating of the turbine by look.

At least we need the operational data such as data on the Inlet Steam Pressure and Temp., Exhaust Steam Pressure and Temp., from the Turbine. From this we can find out the Heat Drop per Kg. of Steam.

Based on the inlet and outlet dia, as expressed by you, we can calculate the Steam Flow Rate approx., considering the Velocity for Super Heated Steam as per Standards.

Then Heat Drop per Kg. of Steam devided by 860 multiplied by Steam Flow Rate will be te OUTPUT POWER of THE TURBINE in KW.

i.e POWER OUTPUT in KW = (Heat drop per Kg. in KCal./860 ) x Steam Flow/Hr.

The accuracy of estimate depends upon the reaching out to near correct operational data.

You have not referred about any steam bleeding for process. If the bleeding is to be considered, then power output will be less.

I think I am closer to your expectation. Now you have to express your views. Let us see other CR4 MEMBERS views.

DHAYANANDHAN.S