What is the pressure ratio of a gas turbine?
In aeronautical engineering, overall pressure ratio, or overall compression ratio, is the ratio of the stagnation pressure as measured at the front and rear of the compressor of a gas turbine engine. The terms compression ratio and pressure ratio are used interchangeably.
What is back work ratio in gas turbine?
Some of the power produced in the turbine of a gas turbine power plant is used to drive the compressor. The ratio of the compressor work to the turbine work is called the back-work ratio. Sometimes, more than one-half of the turbine work may be used by the compressor.
How do you calculate thermal efficiency of a gas turbine?
From Equation [11.28] we observe that the thermal efficiency of a simple cycle gas turbine when irreversibilities are present is equal to the ideal thermal efficiency (1 – (1/c)) multiplied by a function of t, ηc, ηt and c.
How do you calculate turbine efficiency?
Steam Turbine Efficiency
- Efficiency (ɳ) = Output / Input.
- Efficiency (ɳ) = Work Done / Input Kinetic Energy.
- Figure 1: Blade efficiency of impulse and reaction steam turbine.
- Different Efficiencies of Steam Turbines.
Does temperature change in a turbine?
Because the flow capacity of the turbine section determines the pressure-flow-firing temperature relationship, equilibrium will be found at a lower flow, and a lower pressure ratio, thus a reduced power output. The compressor discharge temperature at constant speed increases with increasing temperature.
What is the maximum possible turbine inlet temperature?
1,600 degrees Celsius
How efficient is a turbine?
Turbine efficiency is the ratio of actual work output of the turbine to the net input energy supplied in the form of fuel. For stand-alone gas turbines, without any heat recovery system the efficiency will be as low as 35 to 40 per cent.