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Ing. Patrick Schwarzbauer Solar thermal organic Rankine cycle (ORC) rho[8]=density(R134a,h=h[8],P=P[8]) flow_rfc = 0.000833 [m^3/s] mrfc = rho[1]*flow_rfc "set based on minimum flow rate of bitzer turbine (3 m3/h)" Qrfc= mrfc*(h[1]-h[5]) Wt = mrfc*(h[2] - h[1]) Wp = mrfc*(h[5] - h[4]) Wnet = (-Wt)-Wp eta = Wnet/Qrfc *100 "CONDENSATION" "caclulate heat taken away from R134a during condensation" "during condensation and from superheated to satuarted vapor" "Q_cond = mrfc*(hsat[2] - h[3]) + mrfc*(h[2] - hsat[2])" Q_cond = mrfc*(h[4]-h[2]) Q_cond = Q_cw Q_cw = m_cw*cp_cw*(T_cw2 - T_cw1) "Cooling Water Specs" T_cw1 = 20 "14 C winter temperature / 20 C summer temperature" T_cwf = (T_cw1+T_cw2)/2 "film temperature" flow_cw = 0.0002208 [m^3/s] "3.5 gpm based turbine project or could be 10gpm based on Port. Water Bureau" P_cw = 4.14 "60 psi between 40-80 range" cp_cw=cp(Water,T=T_cwf,P=P_cw) "rho_cw = density(Water,T=T_cwf,P=P_cw)" rho_cw = 1000 [kg/m^3] m_cw = rho_cw*flow_cw "EVAPORATION" "caclulate heat taken away from R134a during evaporation" "during subcooled to saturated liquid, evaportation, and from satuarted vapor to superheated" "Q_evap = mrfc*(hsat_liq[1]-h[4]) + mrfc*(hsat_vap[1]-hsat_liq[1]) + mrfc*(h[1] - hsat_vap[1])" Q_evap = mrfc*(h[1]-h[5]) "calculate heat from solar collector" "2: Calculation of mass flow in the refrigerant cycle" m_sc=0.0063 [kg/s] "Mass flow of the solar water cycle [PowerEnergy 2016-59098, 2016]" "constrained by research paper which found max delta T at this flow rate of water" T_sc1=30.5 [C] "Inlet temperature solar water cycle" "{Tsc1_deg=converttemp(K;C;Tsc1)}" "Converting Kelvin in Celsius" T_sc2=70 [C] "Outlet temperature solar water cycle" "{Tsc2_deg=converttemp(K;C;Tsc2)}" "Converting Kelvin in Celsius" T_scf=(T_sc1+T_sc2)/2 "Mean temperauter of solar water cycle" P_sc=1.01325 [bar] "Pressure of solar water cycle --> assumption: ambient pressure due to open system 1013mbar" cp_sc=cp(Water,T=T_scf,P=P_sc) "specific heat at constant pressure" -31-PDF Image | Solar thermal organic Rankine cycle (ORC)
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