Turbine Inlet Temperature
against the spark advance in the interval of engine speed from 2500 to 4500rpm.
8 and 9 show the influence of turbine inlet temperature
on thermal and exergy efficiencies, respectively, as a function of the reheating pressure ratio for cyclohexane cycle at the other already described thermodynamics states.
compressor and turbine inlet temperatures
, compressor pressure ratio) are so inter-related that a change in one parameter can move the turbocharger to an off-design operating point.
The heat exchanger and condenser pressures are taken to be 3000 and 400 kPa, respectively, while the turbine inlet temperature
(or heat exchanger exit) is taken to be 150[degrees]C, which is 15[degrees]C lower than the geothermal water temperature at the heat exchanger inlet.
Turbine inlet temperatures
in the gas path of modern high-performance jet engines can exceed 3,000[degrees]F, while non aviation gas turbines operate at 2,700[degrees]F or lower.
The author believed these prospects were based on raising the turbine inlet temperature
in the near future to 648[degrees]C (1,200[degrees]F) from 538[degrees]C (1,000[degrees]F), raising the cycle efficiency (of the Neuchatel machine) from 18% to 23%, representing an improvement of 28%.
If the pilot is able to reduce the throttle setting to get the turbine inlet temperature
below 2,000 [degrees]F, the ash particles will not soften to a glassy state and will tend to pass through the engine.
For modern cycles, further improvements in turbine inlet temperature
and aerodynamic component efficiencies, while still useful, will have diminishing returns.
I am not against improving turbine inlet temperature
Modern high turbine inlet temperature
jet engines with long life (that is, 25,000 hours of operation between overhauls) would not be possible without the use of single-crystal turbine airfoils.
Cycle analysis said that the higher the compressor pressure ratio, the more efficient the turbofan--provided the turbine inlet temperature
could be optimized for the pressure ratio.
A conventional boiling water reactor nuclear power plant costs $2,000/kW or higher, and a simple-cycle gas turbine plant fueled by natural gas is about $400/kW The PBMR turbine inlet temperature
level is modest at 900[degrees]C (1,652[degrees]F), and the compression ratio is fairly low at about 3:1.