How do you determine the temperature of a steam turbine outlet?
How do you determine the temperature of a steam turbine outlet?
The unit work equation is: wt = (inlet steam enthalpy – cold reheat enthalpy) + (hot reheat enthalpy – turbine exhaust enthalpy). In this case, wt = (1,474.1 – 1,248.1) + (1,526.5 – 1,003.9) = 748.6 Btu/lbm.
What is the temperature of steam turbine?
A steam turbine consists of stationary and rotating blades on an axle. High pressure steam enters the turbine. The steam can be anywhere from 200 °C to 400 °C. The stationary blades direct streams of high pressure steam onto the rotating blades, which turns the axle.
How is turbine quality calculated?
To compute the quality at the turbine exit, we recognize that this exit state is defined by the condenser pressure of 10 kPa and an isentropic process such that sout = sin = s(10 MPa, 500oC) = 6.5995 kJ/kg·K. The outlet quality is thus found from the following equation. xout = 0.793 .
How do you calculate turbine inlet temperature?
Turbine inlet temperature of a gas turbine engine is calculated from compressor discharge temperature, total and static pressures and total fuel metered to the engine by combining a sensed engine temperature with a derived fuel/air ratio and from the empirical burner can temperature rise equation solving for the …
What is turbine outlet temperature?
In a turbine engine, Exhaust Gas Temperature (EGT), sometimes referred to as Turbine Outlet Temperature (TOT), is the temperature of the turbine exhaust gases as they leave the turbine unit. In a piston engine, EGT is a measurement of the temperature of the exhaust gases at the exhaust manifold.
What is the turbine inlet temperature?
Turbine Inlet Temperature (TIT) is the temperature of the combustion chamber exhaust gases as they enter the turbine unit. The gas temperature is measured by a number of thermocouples mounted in the exhaust stream and is presented on a flight deck gauge in either degrees Fahrenheit or degrees Celcius.
What is bleeding in turbine?
The terminology bleeding in a turbine is basically for the steam turbines, where the hot steam bleeds out from the turbine due to unsteady pressure conditions. The bled steam is further used in regenerative heating. The bleeding of steam is from the intermediate stages of the turbine.
What is the formula of heat rate?
Using the well-known definition of efficiency and heat rate— h = P/HC and HR = 3,412/h Btu/kWh—it can be shown that the value of 1 Btu/kWh reduction in heat rate is given by Equation 2. Equation 2.
What are the problems with gas turbine inlet temperature?
Increasing turbine inlet temperature is a means of improving efficiency, but this temperature exceeds allowable temperature of metal parts. In addition, the gas turbine hot parts operate in a harmful condition of centrifugal and gas pressure forces and thermal cycling. Subsequently, most of the life problems are encountered in this area.
How do you predict the life of a steam turbine blade?
Hashemi and Carlton [22] predicted the blade life of a steam turbine by estimating creep and fatigue life as main failure mechanisms. Their life prediction system used a linear damage accumulation method in order to calculate the total life of blade.
How to simulate gas turbine blade heat transfer using conjugate heat transfer?
In cooled turbines, in order to calculate blade temperature precisely, internal coolant, external hot gas, and metal conduction should be simulated simultaneously by conjugate heat transfer (CHT) method. There have been increased research efforts in applying the CHT methodology to simulate gas turbine blade heat transfer.
How do I calculate the energy flow of a steam engine?
Using the Steam Property Calculator, properties are determined using Inlet Pressure and the selected second parameter (Temperature, Specific Enthalpy, Specific Entropy, or Quality). The Specific Enthalpy is then multiplied by the Mass Flow to get the Energy Flow:
