Ejercicio Ees

File:Ciclo frigorifico ideal.EES


Ciclo Refrigeración sobrecalentado ideal (Ciclo frigorífico ideal)


Datos


TC = 35 T CK = ConvertTemp C ; K ; TC


TF = 24TFK = ConvertTemp C ; K ; TF


T0 = TCK IncrT = 7


x1 = 1 x3 = 0


Qm EVP = 1,147 [kW]


η CMP = 0,9


Cálculos


T1 = TFK - IncrTh1 = h 'R134a' ; T =T1 ; x =x1


s1 = s 'R134a' ; T =T1 ; x =x1


P1 = P 'R134a' ; T =T1 ; x =x1


T3 = TCK - IncrT


h3 = h 'R134a' ; T =T3 ; x=x3


s3 = s 'R134a' ; T =T3 ; x =x3


P3 = P 'R134a' ; T =T3 ; x =x3


P2 = P3


s2 = s1


x2 = x 'R134a' ; P =P2 ; s =s2


h2 = h'R134a' ; P =P2 ; x =x2


T2 = T 'R134a' ; P =P2 ; x =x2


h4 = h3


T4 = T1


x4 = x 'R134a' ; T =T4 ; h =h4


s4 = s 'R134a' ; T =T4 ; x =x4P4 = P 'R134a' ; T =T4 ; x =x4


Tranferencias de Energia, Entropia, Irreversibilidad


w CMP


q CND


= h1 - h2 s 12


= h2 - h3 s 23


= s2 -s1


= s3 - s2


s G12 = s12




s G23 = s23 -


irrv12 = sG12

q CND irrv23
T CK


· T0


= sG23 · T0



File:Ciclo frigorifico ideal



s34 = s4 - s3 s G34 = s34 irrv34


q EVP = h1 - h4 s 41 = s1 - s4



= sG34 · T0




s G41 = s41 - qEVP








irrv41 = sG41 · T0TFK


irrvTotal = irrv12 + irrv23


Flujo másico




m = QmEVP
q EVP


WmCMP = wCMP · mEficiencias


- qEVP


+ irrv34 + irrv41














QmCND = qCND







TFK



















· m IrrvmTotal = irrvTotal · m...