Table of Contents
What is wheel Case pressure in turbine?
In case of steam turbine, there is a chamber on the balance side. Between fisrt stage, Impilse stage, nrozzle and balance Piston is where it is. For the same load on the turbine, if wheel chamber pressure goes up, it means turbine fouling.
What is Balance Piston in steam turbine?
Balance piston is exposed to high pressure on one side and discharge pressure/low pressure on other side. The steam enter in between the balance piston and first stage of turbine and give a reaction force to the balancing piston opposite to the axial thrust hence it counter balance the turbine shaft.
What is turbine first stage pressure?
1st stage pressure is a reliable and fast measurement of relative steam flow to the turbine without suffering pressure drop penalties from a flow nozzle. It is a critical measurement in load control loops, feedwater/drum level control loops, and drum pressure.
What is turbine fouling?
Gas Turbines Power. Fouling of compressor blades is an important mechanism leading to performance deterioration in gas turbines over time. Fouling is caused by the adherence of particles to airfoils and annulus surfaces. Particles that cause fouling are typically smaller than 2 to 10 microns.
Does a turbine increase pressure?
There is no pressure change of the fluid or gas in the turbine blades (the moving blades), as in the case of a steam or gas turbine, all the pressure drop takes place in the stationary blades (the nozzles). The pressure of the gas or fluid changes as it passes through the turbine rotor blades.
What are stages in turbine?
Only a small fraction of the overall pressure drop available in a turbine can be extracted in a single stage consisting of a set of stationary nozzles or vanes and moving blades or buckets.
What is difference between scaling and fouling?
When cooling systems operate, water with fouling factors flow through the system: Hard water causes scaling, whereas seawater can cause biofilm, or growth of micro and macro species. As fouling increases, two things occur: First, the volume of water that can flow through the heat exchanger is reduced.
In which turbine the nozzle is fix?
A reaction turbine is constructed of rows of fixed blades and rows of moving blades. The fixed blades act as nozzles.
What is a 50\% reaction turbine?
A reaction turbine, therefore, is one that is constructed of rows of fixed and rows of moving blades. Thus a blade with a 50 percent degree of reaction, or a 50 percent reaction stage, is one in which half the enthalpy drop of the stage occurs in the fixed blades and half in the moving blades.