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Mappa delle Temperature

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Mappa delle Temperature

Di seguito si riportano gli intervalli di validit`a delle Temperature di ciascun nodo dell’impianto, e le relative relazioni h(T ):

Nodo Intervallo [◦C] Relazione h(T)

0 5 ≤ T0 ≤45 h0 = 4.183 · T0+ 0.2828 1 1000 ≤ T1 ≤1700 h1 = 2.694 · T1+ 1910 2 500 ≤ T2 ≤1300 h2 = 2.383 · T2+ 2274 3 180 ≤ T3 ≤660 h3 = 2.149 · T3+ 2410 4 1000 ≤ T4 ≤1700 h4 = 2.676 · T4+ 1944 5 500 ≤ T5 ≤1200 h5 = 2.375 · T5+ 2276 6 500 ≤ T6 ≤950 h6 = 2.221 · T6+ 2387 7 90 ≤ T7 ≤400 h7 = 1.959 · T7+ 2488 8 25 ≤ T8 ≤280 h8 = 1.896 · T8+ 2499 9 5 ≤ T9 ≤50 h9 = 4.183 · T9+ 0.3792 11 80 ≤ T11≤165 h11 = 4.172 · T11+ 27.83 12 300 ≤ T12 ≤450 h12 = 0.0466 · T 2 12−25.79 · T12+ 4896 13 500 ≤ T13 ≤700 h13 = 3.478 · T13+ 1302 14 264 ≤ T14 ≤500 h14 = −0.001951 · T 2 14+ 4.093 · T14+ 1873 15 5 ≤ T15≤50 h15 = 4.094 · T15+ 33.9 241

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Nomenclatura

Simboli usati

Simbolo Descrizione Unit`a di Misura

h Entalpia Specifica [kJ/kg] s Entropia Specifica [kJ/(kg◦C)] η Rendimento -˙ m Portata Massica [kg/s] P Potenza [kW] T Temperatura [◦C] p Pressione [bar] v Volume Specifico [m3 /kg] cp Calore Specifico a pressione costante [kJ/(kg◦C)]

R = 0.461526 Costante Specifica dei Gas [kJ/(kg K)]

riferita al peso molecolare dell’acqua

L Lavoro sull’unit`a di tempo (Potenza) [kW]

q Potenza Termica [kW]

U Coefficiente Globale di Scambio Termico [kW/(m2 ◦C)]

A Superficie di Scambio Termico [m2

] 242

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NOMENCLATURA 243

Simboli usati

Simbolo Descrizione Unit`a di Misura

HT High Temperature (Turbine)

-HHT High High Temperature (Turbine)

-HIT High Intermediate Temperature (Turbine)

-LT Low Pressure and Temperature (Turbine)

-HRBL Heat Recovery Boiler

-RHE Regenerative Heat Exchanger

-BFP Boiler Feed Pump

-CP Condensate Pump

-SEP Surplus Extractor Pump

-HPCB High Pressure Combustion Chamber

Riferimenti

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