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New Concepts FOR Organic Rankine Cycle Power Systems

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New Concepts FOR Organic Rankine Cycle Power Systems ( new-concepts-for-organic-rankine-cycle-power-systems )

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Pm [kW] Mmax Din [mm] Hin [mm] δmax [◦ ] ( pT,in / pS,out )stg R Table 3.8: Main results for the 3-stage 10.3 ηTχ=0.5 0.77 1.33 ω [rpm] 15400 57 Dout [mm] 162 2 Hout[mm] 18 11.8 Stage 1st 2nd 3rd 3.6 4.1 4.5 0.25 0.37 0.42 10 kWM supersonic turbine. Centrifugal Turbines for ORC Applications 1 st rot MW3= 1.06 M =0.58 U3 1.16 0.73 1.31 1.12 MC2= 1.23 nd 2 rot rd 3 rot 0.58 0.59 0.62 0.49 M =0.50 U2 1.20 0.66 1.21 0.93 M =0.52 C3 M =0.76 W2 rd 3 rot nd 2 rot st 1 rot Rotational axis 23 40 20 0 -20 -40 0 20 40 60 80 100 ROT radius [mm] (b) Figure 3.12: Results for the design of the novel methodology presented in this chapter, adopting the boundary conditions reported in Tab. 3.5. Fig. 3.12a shows the velocity triangles, in black those referring to the rotor inlet section, in grey to the rotor outlet. The Mach numbers corresponding to the different velocity components are also detailed. The solid lines represent the results obtained with the Traupel model [21], while the dashed ones those pertaining to the Craig & Cox one [15]. The corresponding meridional section is depicted in Fig. 3.12b. In this case, the results of the two models are not distinguishable. (a) s, p T, h ρ, c MW, z = specific entropy [kJ kg−1 K−1], pressure [bar] = temperature [◦C], specific enthalpy [kJ kg−1] = density [kg m−3], speed of sound [m s−1] = molecular weight [g mol−1] , compressibility factor the 3-stage supersonic 10 kWM turbine designed following 81 H [mm]

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