Gas turbines Brayton cycle

In the gas turbine (Brayton cycle), the compression and expansion processes are adiabatic and isentropic processes. Thus, for an isentropic adiabatic process 7 = where Cp and c are the specific heats of the gas at constant pressure and volume respectively and can be written as ... 

In the NPPS based on the NPP technology, the reactor is successfully combined with a dynamic power conversion system operating in a closed gas turbine Brayton cycle (helium and xenon) or in a potassium steam turbine Ranldne cycle. 

This reactor design also included two possible power cycles, a steam cycle at 540 C and a helium gas-turbine Brayton cycle at 870 C, both providing - 44% efficiency with present technology. 

An exception is the BN GT-300 (17) sodium cooled reactor concept of 300 MW(e), which couples a sodimn-cooled reactor with gas-turbine Brayton cycle for electricity generation it also ehminates intermediate heat transport system (ANNEX XVIll). 

XX-40] MOISSEYTSEV, A.V., SENICKI, J. J., WADE, D. C., Turbine design for a supercritical carbon dioxide gas turbine Brayton cycle, Advances in Nuclear Power Plants (Proc. of Int. Congress, Cordoba, Spain, May 4-7, 2003) ICAPP 03 pp 3064 (2003). 

The S-CO2 gas turbine Brayton cycle power converter for electricity production provides a cycle efficiency of 44% at a lead core outlet temperature of 566°C. 

Cycle t) e Indirect gas turbine Brayton cycle with supercritical carbon dioxide... 

Circuits - Lead primary coolant circuit with natural circulation - Supercritical carbon dioxide secondary circuit with gas turbine Brayton cycle - Four kidney shaped in-vessel heat exchangers (HXs). 

Cycle type Cycle efficiency Indirect cycle with gas turbine Brayton cycle secondary side using supercritical carbon dioxide as the working fluid at 20 MPa. 44.0% ... 

XXn-10] MOISSEYTSEV, A., SIENICKI, J.J., WADE, DC., Cycle analysis of supercritical carbon dioxide gas turbine Brayton cycle power conversion system for liquid metal-cooled fast reactors, ICONE-11 (11 Int. Conf. on Nuclear Engineering, Tokyo, April 20-23, 2003), Paper ICONE 11-36023. 

The STAR-LM vertical cross-section and schematic diagram are given in Fig. XXM-l and XXin-2, respectively. The STAR-LM is an indirect cycle lead cooled reactor. The traditional Rankine steam cycle has been replaced with a gas turbine recompression Brayton cycle that utilizes S-CO2 as the working fluid. Its thermophysical properties immediately above the critical point result in a relatively low work requirement to compress the S-CO2 fluid. The S-CO2 gas turbine Brayton cycle power converter for electricity production provides a cycle efficiency of 44.9% at a core outlet Pb temperature of 588°C. 

High efficiency of energy conversion resulting from high or very high temperature at the core outlet good heat transfer properties of the liquid salt and the use of a closed gas turbine Brayton cycle in power circuit. 

Cycle type Direct closed cycle gas turbine (Brayton cycle)... 

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