Improved analysis of Organic Rankine Cycle based on radial flow turbine

Experimental study of an organic Rankine cycle system with radial inflow turbine and R123

“…Based on the thermodynamic analysis of ORC system and the aerodynamic design of the turbine, Li et al [5] found that the shock wave can be controlled at the high expansion ratio in the nozzle. Pan et al [6] adopted the internal efficiency of optimal radial flow turbine instead of isentropic efficiency, and found internal efficiency depends on expansion ratio. In the application of a heavy-duty off-road diesel engine, Costall et al [7] presented a design method for radial turbine expander, and found that the turbo expander for ORC is practical even though at a small scale.…”

Influence of the radial-inflow turbine efficiency prediction on the design and analysis of the Organic Rankine Cycle (ORC) system

“…(3) the constant turbine efficiency is set as 0.8, which is used to compare with the calculated one-dimensional turbine efficiency predicted by the model; (4) the pinch point temperature differences of the evaporator and the condenser are fixed at 6 K; (5) the superheating degree of the working fluid at the inlet of the radial-inflow turbine is set as 1 K; (6) the condensation temperature of the working fluid is set as 305 K; (7) the initial parameters of the radial-inflow turbine mentioned above are listed in Table 2, which are obtained from [26,27]. …”

An innovative small-scale two-stage axial turbine for low-temperature organic Rankine cycle

“…The R134a had the maximum turbine isentropic efficiency of 83% and inlet total pressure and temperature, rotational speed and rotor inlet diameter of 38 bar, 147°C, 54,000 rpm and 48 mm respectively. Pan and Wang [3] efficiency with dynamic efficiency, based on the operating conditions and working fluids. Conventional analysis based on the RIT was conducted.…”