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List of Figures ix 2-30 TIT, CO2 mass flow rate, regenerator power and effectiveness as a function of the compressor discharge pressure for the s-CO2 regenerative and recompression Brayton power systems (ηTR = 50%, T2 = 31.25◦C, P2 = 74 bar, ηTR = 93.4%, ηCM1 =85%,ηCM2 =85%,ηHR =90%,∆PLS =2%,∆TPN =10◦C). . . . . . . 31 3-1 PCHEplatesandsectionofthefinalblock[2]. .................. 34 3-2 PCHE Typical characteristics and operational envelope [3]. . . . . . . . . . . . . 34 3-3 Geometry of the section the core of a PCHE and top view of a single channel. . . 35 3-4 PCHE wall thickness and plate thickness as a function of the pressure difference andtheinternalpressure. .............................. 37 3-5 Side and front views of the discretization of the channels travel length used for the dimensioningoftheregenerators........................... 42 3-6 Calculation of the overall heat transfer coefficient, Nusselt number, Reynolds num- ber and dynamic viscosity for the PCHE in the work of Song [4] as a function of thenumberofcontrolvolumes(NCV)andtravellength(L). . . . . . . . . . . . 45 3-7 PCHE temperature profile (according to the Hesselgraves correlations) as a function of the travel length. Values in parenthesis are those given by Heatric and reported bySong[4]. ..................................... 46 3-8 Percentage acceleration losses with with respect to friction losses as a function of thetravellength. .................................. 46 3-9 Converge of regenerators length for the PCHE of Song as a function of the number ofsections....................................... 47 3-10 Contour lines of the regenerators weight (tonne) as a function of the pressure drop and the discharge pressure for the regenerative and vapor recompression Brayton systems (ηTH = 50%, T2 = 31.25◦C, P2 = 74 bar, ηTR = 93.4%, ηCM = 85%, ηHR=90%,∆TPN=10◦C). ............................ 48 3-11 Printed Circuit Heat Exchanger photograph and diagram. . . . . . . . . . . . . . 48 3-12 Cooler schematic diagram. Tube bundle front and side views. . . . . . . . . . . . 49 3-13 Cooler pipe minimum thickness as a function of the internal pressure and the pipe outsidediameter[mm]. ............................... 54 3-14 Discretization of the pipes and single control volume in the dry cooler. . 3-15 Cooler division in groups used for the iterative procedure. . . . . . . . . 3-16 Flow diagram of the iterative procedure for dimensioning of the cooler. 3-17 Cooler diagram correspondent to the validation procedure (taken from ASPEN [5]). Allthedimensionsinmm............................... 61 3-18 Fan power and bundle weight of the solutions for the cooler geometry as a func- tion of the tube length, number of passes and rows. The design optimization is performed for the recompression Brayton system described in Figure 2-21. . . . . 62 3-19 Characteristics of the cooler optimal geometry and its correspondent temperature profile for the recompression Brayton system described in Figure 2-21. . . . . . . 62 4-1 Turbofanschematicdiagram............................. 67 4-2 Ideal propulsive efficiency as a function of the velocity ratio. . . . . . . . . . . . 68 4-3 SchematicT-sdiagramofthefansideofaturbofanengine. . . . . . . . . . . . 70 4-4 FanT-sdiagramoftheTurbofanTrent1000engine. . . . . . . . . . . . . . . . 72 4-5 SchematicT-sdiagramofthecoresideofaturbofanengine. . . . . . . . . . . . 72 4-6 CoreT-sdiagramoftheTurbofanTrent1000engine. . . . . . . . . . . . . . . . 73 4-7 Turbofanoverallcontrolvolume. .......................... 74 4-8 Contour lines of the regenerators weight (tonne) as a function of the pressure drop and discharge pressure for the regenerative and vapor recompression Brayton systems (ηTH = 50%, T2 = 31.25◦C, P2 = 74 bar, ηTR = 93.4%, ηCM = 85%, ηHR=90%,∆TPN=10◦C). ............................ 75 4-9 Solar tower power complex. The power block is composed by the turbomachinery andtheheatexchangers. .............................. 76 4-10 Tower,heliostatandsunrayrelativepositions.. . . . . . . . . . . . . . . . . . . 77 4-11Heliostatfield,coordinatesystem. ......................... 78 4-12 Heliostat staggered array (based on the works of Collado et. al. [6]). . . . . . . . 80 Master of Science Thesis J.S. Bahamonde Noriega ..... 55 ..... 58 ..... 59PDF Image | Design method for s-CO2 gas turbine power plants
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