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From the cycles comparison, has emerged: • The benefit from higher thermal efficiency of partial cooling cycle with improved regeneration pales in overall cycle complexity, which causes pinch point problems within recuperators. • Splitting the expansion, can be sufficiently reduced pressure in the reactor, without significant reduction of cycle thermal efficiency. It is difficult to judge, which cycle is generally the best. For instance: When an application at compressor outlet pressures about 20MPa is considered, from one point of view the re-compression cycle is the best due to respect of simplicity and high thermal efficiency. While, from point of load control the partial cooling cycle is better, due to less steep characteristic, which means lower change of the cycle thermal efficiency in part load operating. If high thermal efficiency is in the focus, the partial cooling cycle with improved regeneration is the best, but only for compressor outlet pressure 10 to 15MPa, and proper combination of recuperators efficiencies. In the future research, more detailed analysis; which would consider dynamic behaving of the system, technical economic aspects, performance controls and material requirements should be performed. References Dostal V., Driscoll M.J., Hejzlar P., “A Supercritical Carbon Dioxide Cycle for Next Generation Nuclear Reactors ”, MIT-ANP-TR-100, March, (2004). Angelino G., “Carbon Dioxide Condensation Cycles for Power Production”, ASME Paper No. 68-GT-23, (1968). Angelino G., “Real Gas Effects in Carbon Dioxide Cycles”, ASME Paper No. 69-GT-103, (1969). Petr V., “Heat cycles in energetics“ A notes from lectures., Prague, (2007). Vogel J., “Programming in FORTRAN“(Czech), SNTL, Prague, (1973). Petr V., Kolovratnik M, “A Study on Application of a Closed Cycle CO2 Gas Turbine in Power Engineering (in Czech)”, Czech Technical University in Prague, Department of Fluid Dynamics and Power Engineering, Division of Power Engineering, Departmental report Z-523/97, November, (1997)PDF Image | 2009 TECHNOLOGY INNOVATION WINNERS
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