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[state_vec,x] = ORC(sysvals) # state = [p,t,h,s] # State 1: Saturated liquid # State 2: Turbine inlet (saturated vapor) # State 3: Turbine outlet (vapor) # State 4: Start of condensing process (saturated vapor) # State 4b: End of condensing process (saturated liquid) # State 5: After pump # Analysis if x==1: # If superheated vapor at turbine exit, then computing: W_t=state_vec[1,2]-state_vec[2,2] W_p=state_vec[5,2]-state_vec[4,2] Q_in=state_vec[1,2]-state_vec[5,2] Q_out=state_vec[2,2]-state_vec[4,2] # Turbine work # Pump work # Total Heat addition # Total Heat rejection elif x<1: # If two-phase mixture at turbine exit, then computing: W_t=state_vec[1,2]-state_vec[2,2] W_p=state_vec[4,2]-state_vec[3,2] Q_in=state_vec[1,2]-state_vec[4,2] Q_out=state_vec[2,2]-state_vec[3,2] # For both cases, computing: P_evap = state_vec[0,0] /1e5 # Bar P_cond = state_vec[0,3] /1e5 # Bar BWR = W_p / W_t eta_th = (W_t - W_p) / Q_in eta_el = eta_th * 0.95 eta_C = 1 - (T_cold_in)/(T_hot_in) FoC = eta_th / eta_C # rounding to n digits n=4 W_t=round(W_t,n)/1000 W_p=round(W_p,n)/1000 Q_in=round(Q_in,n)/1000 Q_out=round(Q_out,n)/1000 BWR=round(BWR*100,n) eta_th=round(eta_th*100,n+2) eta_el=round(eta_el*100,n+2) eta_C=round(eta_C*100,n+2) FoC=round(FoC*100,n+2) T_crit=round(T_crit,n+2) T_triple=round(T_triple,n+2) x=round(x*100,n+2) #P_evap=round(P_evap,n) #P_cond=round(P_cond,n) # Turbine work # Pump work # Total Heat addition # Total Heat rejection print(f"\033[4mConditions:\033[0m\nEvaporation temperature: {state_vec[0,1]-273.15}[C]\n\ Condensation temperature: {state_vec[3,1]-273.15}[C]\nWorking fluid: {fluid}\nCritical temperature: {T_crit}[C]\n\ Triple point temperature: {T_triple}[C]\n\033[4m\nOutput:\033[0m\nEvaporation pressure: {P_evap}\nCondensation pressure: {P_cond}\nTurbine wo Heat addition: {Q_in}[J/kg]\nHeat rejection: {Q_out}[J/kg]\nThermal efficiency: {eta_th}%\n\ Electric efficiency: {eta_el}%\nFraction of Carnot efficiency: {FoC}%\nVapor quality: {x}%") # S,T,h and p vectors S_vec=state_vec[:,3] S_vec=np.append(S_vec,S_vec[0]) T_vec=state_vec[:,1] T_vec=np.append(T_vec,T_vec[0]) T_vec=T_vec-273.15 h_vec=state_vec[:,2] h_vec=np.append(h_vec,h_vec[0]) p_vec=state_vec[:,0] p_vec=np.append(p_vec,p_vec[0]) S_hot_source=np.linspace(state_vec[0,3],state_vec[1,3],2) 106PDF Image | Analysis of Organic Rankine Cycles for a Boiler Station
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