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ORC thermodynamic efficiency ORC thermodynamic efficiency Model Validation : Overall ORC-System Performance Evaluation The complete ORC simulation model is validated against the experimental data taken by [xx] 8.0% 8.0% For each operating point, the following parameters were kept equal to the corresponding value measured : 7.0% 7.0% 6.0% evaporating temperature; evaporating and condensation 6.0% Exp. data Ref. [98] 5.0% 5.0% 6.0 7.0 3.0 4.0 5.0 8.0 3.0 4.0 5.0 6.0 7.0 8.0 ORC system data Working fluid Hot air source mean temperature Air mass flow rate Pressure ratio Scroll compressor swept volume Scroll built-in pressure ratio Mass flow rate Expander rotating speed Evaporating temperature Condensing temperature Liquid receiver volume ORC measured performance Shaft power Net electric power Expander effectiveness Cycle efficiency R245fa From the direct comparison with experimental data: Pressure ratio Pressure ratio Exp. data Ref. [98] Predicted values pressures; expander rotational speed; expander isentropic efficiency. Predicted values 110 – 134 °C 71 – 126 g/s 2.42 – 7.44 122 cm3 4 49 – 78 g/s 1855 – 3125 rpm 84.3 – 102.1 °C 26.5 – 56.5 °C 8 dm3 Good agreement with experimental data; Average deviation is 2.9%. The maximum 180.5 – 2164 W -224 – 1709 W 59.6% – 70.9% -1.4% – 7.3% 8%, in agreement with literature data. deviation is 8.6%; ORC system efficiency in the range of 5% ‐PDF Image | Advanced Simulation Model For ORC Based System
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