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Design method for s-CO2 gas turbine power plants

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Design method for s-CO2 gas turbine power plants ( design-method-s-co2-gas-turbine-power-plants )

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Chapter 3 Components design This chapter describes the steady state design of the regenerators and the cooler. The di- mensioning of the turbomachinery is not treated in this work and the design of the heater is considered in the next chapter for a specific application. The thermodynamic analysis per- formed previously gives the operating conditions which are used as inputs for the components design, which include several steps: • analysis of material and geometrical characteristics, • development of the calculation procedure for the dimensions of the components, • validation and selection of correlations for the overall heat transfer coefficient and pres- sure drop, • application of the dimensioning procedure to calculate the key characteristics of the heat exchangers. 3-1 Regenerators As shown in the thermodynamic analysis, the regenerators share the largest power among the components of the system and then it is necessary to consider compact heat exchangers in order to keep their dimensions and weight as low as possible. In this regard, there is an increasing interest in Printed Circuit Heat Exchangers (PCHE) and there are already several theoretical and experimental studies about the application of such devices with s- CO2 [16,23,26,27]. All the referenced works recommend using PCHE due to several reasons that will be explained in the next section. 3-1-1 PCHE description These heat exchangers are constituted by several metal plates which are photo-chemically etched on one side using a technology similar to that used for electronic circuits, hence the Master of Science Thesis J.S. Bahamonde Noriega

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