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SMALL-SCALE RADIAL INFLOW TURBINE FOR WHR ORC

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SMALL-SCALE RADIAL INFLOW TURBINE FOR WHR ORC ( small-scale-radial-inflow-turbine-for-whr-orc )

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FIGURE 5-6 INTEGRATION OF THE GENETIC ALGORITHM WITH THE ORC-RIT MODEL (FIGURE 5-5). 173 FIGURE 5-7 VARIATION OF Φ AND Ψ AND THEIR EFFECTS ON ΗTHERMAL,CYCLE, ΗSTAGE,TS AND DMAX............... 176 FIGURE 5-8 VARIATION OF 𝑚𝒘𝒇 AND ERTS AND THEIR EFFECTS ON ΗTHERMAL,CYCLE, ΗSTAGE,TS AND DMAX ... 178 FIGURE 5-9 VARIATION OF TT,1 AND ΔTSUPERHEAT AND THEIR EFFECTS ON ΗTHERMAL,CYCLE, ΗSTAGE,TS AND DMAX180 FIGURE 5-10 VARIATION OF Ω AND Ξ AND THEIR EFFECTS ON ΗTHERMAL,CYCLE, ΗSTAGE,TS AND DMAX ............. 182 FIGURE 5-11 VARIATION OF Α5 AND R5,TIP/R4 AND THEIR EFFECTS ON ΗSTAGE,TS AND DMAX....................... 183 FIGURE 5-12 VARIATION OF R2/R3 AND ITS EFFECT ON ΗSTAGE,TS AND DMAX ............................................. 183 FIGURE 5-13 VARIATION OF TT,1 AND ΔTSUPERHEAT AND THEIR EFFECTS ON ΗTHERMAL,CYCLE FOR BOTH ORC STANDALONE MODEL AND INTEGRATED ORC-RIT MODEL WITH R245FA, 𝑚𝒘𝒇=0.1KG/S AND ERTS=5 ASSIGNED TO BOTH MODELS ............................................................................................................... 185 FIGURE 5-14 MAXIMUM PREDICTED DIFFERENCE IN ΗTHERMAL,CYCLE OF THE ORC STANDALONE AND ORC- RIT INTEGRATED MODELS BY VARIATION OF TT,1 AND ΔTSUPERHEAT FOR ALL INVESTIGATED FLUIDS .... 185 FIGURE 5-15 VARIATION OF 𝑚𝒘𝒇 AND ERTS AND THEIR EFFECTS ON ΗTHERMAL,CYCLE FOR BOTH ORC STANDALONE MODEL AND INTEGRATED ORC-RIT MODEL WITH R245FA, TT,1=373K AND ΔTSUPERHEAT=3 ASSIGNED TO BOTH MODELS ............................................................................................................... 186 FIGURE 5-16 MAXIMUM PREDICTED DIFFERENCE IN ΗTHERMAL,CYCLE OF THE ORC STANDALONE AND ORC- RIT INTEGRATED MODELS BY VARIATION OF 𝑚𝒘𝒇 AND ERTS FOR ALL INVESTIGATED FLUIDS ........ 186 FIGURE 5-17 COMPARISON OF GA WITH TRADITIONAL OPTIMIZATION TECHNIQUES - CONVERGENCE HISTORY............................................................................................................................................... 189 FIGURE 5-18 CONTRIBUTION OF THE ROTOR AERODYNAMIC LOSSES FOR ALL FLUIDS AT THE OPTIMIZED CONDITIONS......................................................................................................................................... 196 FIGURE 5-19 ORC STATE POINTS OBTAINED BY THE ORC-RIT MODEL AT OPTIMIZED CONDITIONS FOR 12 FLUIDS ............................................................................................................................................ 197 FIGURE 5-20 OPTIMIZED ΗTHERMAL,CYCLE FOR BOTH MODELS AND FOR ALL 12 WORKING FLUIDS............ 201 FIGURE 5-21 SCHEMATIC OF THE DUAL-STAGE ORGANIC RIT (MERIDIONAL VIEW) .......................... 204 FIGURE 5-22 LINEAR REGRESSION ANALYSIS RESULTS (A) OPTIMIZED ΗSTAGE,TS (B) D4 (C) DMAX ........... 209 FIGURE 5-23 COMPARISON OF THE OPTIMIZED ΗTHERMAL,CYCLE OBTAINED BY THE ORC STANDALONE MODEL, ORC-RIT MODEL AND ORC STANDALONE MODEL WITH THE TURBINE CORRELATION (EQUATION 5-37) FOR ALL FLUIDS ...................................................................................................... 211 FIGURE 5-24 COMPARISON OF THE PROPOSED APPROACH IN THE THESIS WITH LITERATURE (RAHBAR ET AL. 2015 [A]) ........................................................................................................................................ 213 FIGURE 5-25 COMPARISON OF THE PROPOSED APPROACH IN THE THESIS WITH LITERATURE (RAHBAR ET AL. 2015 [B]) ........................................................................................................................................ 213 FIGURE 6-1 FLOWCHART OF THE 3-D CFD OPTIMIZATION ................................................................. 219 XIII

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