Full exam for Power Production from Renewable Energy in the Energy Engineering degree programme at Politecnico di Milano. The document covers: Exercize 1 T_HTF,hot 390 °C T_HTF,cold 290 °C GHI 960 W/m2 DHI 150 W/m2 zenith 25 ° azimuth -15 ° Steam cycle net power 50 MW 0.37 Ambient Temperature 25 °C Solar Multiple 1.8 Piping thermal losses 2 MW 66 W/m2 Optical Efficiency 0.77 h_heat,loss 15.0 W/m2/K CF 70 Average DNI
Full exam for Power Production from Renewable Energy in the Energy Engineering degree programme at Politecnico di Milano. The document covers: Exercize 1 T_HTF,hot 390 °C T_HTF,cold 290 °C GHI 960 W/m2 DHI 150 W/m2 zenith 25 ° azimuth -15 ° Steam cycle net power 50 MW 0.37 Ambient Temperature 25 °C Solar Multiple 1.8 Piping thermal losses 2 MW 66 W/m2 Optical Efficiency 0.77 h_heat,loss 15.0 W/m2/K CF 70 Average DNI
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Exercize 1 T_HTF,hot 390 °C T_HTF,cold 290 °C GHI 960 W/m2 DHI 150 W/m2 zenith 25 ° azimuth -15 ° Steam cycle net power 50 MW 0.37 Ambient Temperature 25 °C Solar Multiple 1.8 Piping thermal losses 2 MW 66 W/m2 Optical Efficiency 0.77 h_heat,loss 15.0 W/m2/K CF 70 Average DNI 755 W/m2 Average incidence angle 35 ° Auxiliaries average consumption 1.8 MW Solar field equivalent hours 2750 h Receiver/piping thermal losses as in the design case cos(zenith) 0.91 DNI 893.74 W/m2 Qin,cycle 135.14 MW QfromSF to cycle 137.14 MW Q from SF 245.24 MW A SF 394169.70 m2 Qloss 26.015 MW eta_therm 0.904 - Area_cylGlass 17690.295 m2 Dtglass,amb 98.04 °C Tglass 123.0 °C cos(inc),annual 0.8192 - IAM(inc) 1 - 618.5 W/m2 159.7 MW Eel 162488.6 MWh First principle efficiency of steam cycle Receiver specific thermal losses as in the design case IAM=IAM(θ) 1 - 5ꞏ10 -4ꞏθ Power Block efficiency Exercize 2 Electric Power 480 kW Electrci efficiency 38.7% Reflui zootecnici Cattle slurry 3500 t Cattle manure 8500 t OFMSW 5500 t Biomass Biogas Production [Nm3 biogas/t t.q.] Cattle slurry 34 Cattle manure 93 OFMSW 155 Biogas from sewage sludge 95 CH4% in biogas 48% [% mol] LHV CH4 50 MJ/kg MM CH4 16.04 kg/kmol MM CO2 44.01 kg/kmol Molar volume (ideal gas) 22.41 l/mol Electric power of the new engine 990 kW Efficiency of the new engine 41% CH4 from cattle slurry 40884 kg/y CH4 from cattle manure 271585 kg/y CH4 from OFMSW 292886 kg/y CH4 TOT 605354 kg/y CH4 Energy 30267716.2 MJ 8407698.9 kWh Electric Energy Produced 3253779.5 kWh Equivalent hours 6778.7 h Electric Energy Produced (NEW ENGINE) 6710920.2 kWh CH4 Energy 16368098 kWh 58925153 MJ CH4 requested 1178503 kg CH4 Deficit 573149 kg Sludge from sewage treatment 17561 t mol CO2 from CH4 73473 kmol mol CO2 from biogas 79595 kmol CO2 from CH4 oxidation…
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