ciclos frigorificos
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Refrigeração Industrial
Ciclos FrigoríficosCiclos Frigoríficos
Unochapecó Engº Ferrazza
Diagrama Pressão–Entalpia (P x h)
Pre
ssão
Líquido Subresfriado
Mistura de Líquido e
Linha de Vapor Saturado
Ponto CríticoGás
Entalpia
Pre
ssão Líquido e
Vapor
Vapor Superaquecido
Linha de Temperatura
Constante
Linha de Líquido Saturado
Unochapecó Engº Ferrazza
pre
ssão
Efeito de Refrigeração
Evaporador
1
pre
ssão
entalpia
evaporadorevaporador
[[--1010°°C]C]
2.908 bar abs
R717
4’4
Refrigeração
Unochapecó Engº Ferrazza
pres
são
pres
são
Superaquecimento
pres
são
pres
são
entalpiaentalpia superaquecimentosuperaquecimento
{{
[[--55°°C]C][[--1010°°C]C]
2.908 bar abs2.908 bar abs14’4
Unochapecó Engº Ferrazza
Compressor
2
pres
são
pres
são
compressorcompressor
pres
são
pres
são
entalpiaentalpia
14’4
compressorcompressor
Unochapecó Engº Ferrazza
2iso
Calor de Compressão
100.2100.2°°CC13.504 bar abs13.504 bar abs
pres
são
pres
são
entalpiaentalpia
Calor de Calor de
CompressãoCompressão
IsoentrópicaIsoentrópica
13.504 bar abs13.504 bar abs
14’
+35+35°°CC
4
2.908 bar abs2.908 bar abs
Unochapecó Engº Ferrazza
condensadorcondensador 23
Condensador
subresfriamentosubresfriamento
{{ 2’
3’
12,5 bar
entalpiaentalpia
33°C
pres
são
pres
são
14’
3’+35°C
4
12,5 bar
Unochapecó Engº Ferrazza
Dispositivo de Expansão
23 2’
3’dispositivo de
expansão
pres
são
pres
são
entalpiaentalpia
14’
3’
4
Unochapecó Engº Ferrazza
Equações Básicas do Ciclo Frigorífico
■ Capacidade Frigorífica:
Qev = mRef x (h1 – h4) (kg/s x kJ/kg = kW) ou
Qev = mRef x (h4’ – h4) (kg/s x kJ/kg = kW)
■ Potência Absorvida:■ Potência Absorvida:
Wcp = mRef x (h2 – h1) (kg/s x kJ/kg = kW)
■ Calor Rejeitado:Qcd = mRef x (h2 – h3) (kg/s x kJ/kg = kW)
Unochapecó Engº Ferrazza
Equações Básicas do Ciclo Frigorífico
■ Rendimento Volumétrico do Compressor:
Vol.Comp
1Refvol
D
m v⋅=&
ηsuc
volVol.CompRef
Dm
v
η⋅=&
■ Rendimento Isoentrópico do Compressor:
12r
12iiso
hh
hh
−−=η
cp
12iRefiso
W
)h(hm −= •&η
Unochapecó Engº Ferrazza
Ciclos FrigoríficosCiclo Básico
Unochapecó Engº Ferrazza
Ciclos FrigoríficosDiagrama Pressão x Entalpia (Mollier)
Unochapecó Engº Ferrazza
Ciclos FrigoríficosCiclo de Simples Estágio com Compressor Parafuso e Economiser
Unochapecó Engº Ferrazza
Sistema 01Simples Estágio – Inundado (por Gravidade)
Unochapecó Engº Ferrazza
Sistema 01 – Condições de Operação
0.0
35.0 1.0
1.8
0.2
xOUT [kg/kg] 0.80 R717
Cooling capacity Q E [kW] 1657
Power consumption W [kW] 371.9 371.9 [kW]0.727 [-]
1724.5 [m 3/h]1.506 [kg/s]1657.4 [kW]
COMPRESSOR PERFORMANCE
CYCLE CAPACITY
CYCLE SPECIFICATION
VS :QE : m :
ηηηη IS : WCP :
TE [°C] :
TC [°C] : ∆∆∆∆TSC [K] :
∆∆∆∆pSL [K] :
∆∆∆∆pDL [K] :
REFRIGERANTPRESSURE LOSSESTEMPERATURE LEVELS QUALITY OUT OF EVAPORATOR
1903.5 [kW]QC :
Discharge temperature T 2 [°C] 82.5
Unuseful superheat ∆TSH,SL [K] 5.0
40.1 [%] 82.5 [°C]
22715 [W]
COMPRESSOR HEAT LOSS
fQ : T2 :
QSL :
QLOSS : 149.00 [kW]
SUCTION LINE
T8 : 5.0 [°C] 5.0 [K]∆∆∆∆TSH,SL :
COP : COP* :4.457 4.518Unochapecó Engº Ferrazza
Sistema 01 - Ciclo Frigorífico
2
4
335.0 [°C]
82.5 [°C]
CYCLE ANALYSIS : ONE-STAGE CYCLE
T2 :
TC : QC : 1903.5 [kW]
34.0 [°C]T4 :
> FLOODED EVAPORATOR
SUB-DIAGRAM
WINDOWS
T3 : 82.5 [°C]
CoolPackLOG(p),h-DIAGRAM
75
6
8
1
0.0 [°C]
5.0 [°C]
T6 :
T1 :
TE :
0.80 [kg/kg]X7 :
QE : 1657.4 [kW]
WCP : 371.9 [kW]
4.518COP* :
0.0 [°C]
0.13 [kg/kg]X5 :
1.637 [kg/s]
1.506 [kg/s]mCP :
mEVAP :
nCIRC : 1.25 [-]
4.457COP :REFRIGERANT : R717 ηηηηCARNOT : 0.58
Department ofMechanical Engineering
Technical Univ ersity
TOOL C.2
© 1999 - 2001
of Denmark
Version 1.46
0.0 [°C]T8 :
Unochapecó Engº Ferrazza
Sistema 01 – Condições dos Pontos do Ciclo
TEMPERATURE PRESSURE ENTHALPY
1
2
3
4
5
6
7
5.0
82.5
82.5
34.0
0.0
0.0
0.0
401.9
1361.7
1353.9
1353.9
430.2
430.2
430.2
1460.7
1608.7
1609.0
345.4
345.4
179.9
1192.5
STATE POINTSDENSITY
3.1
8.5
8.4
588.9
-----
638.5
-----
3.388
[°C] [kPa] [kJ/kg] [kg/m 3]STATE POINT
94.4 [°C]
120.5 [°C]
Pressure ratio (p 2 / p1 ) :
T2,IS :
T2,W :
Additional information
T2,IS is the temperature of thedischarge gas assuming reversibleand adiabatic compression
T2,W is the temperature of the7
8
0.0
0.0
430.2
430.2
1192.5
1445.6
-----
3.5
COP : COP* :4.457 4.518
2,Wdischarge gas assuming real andadiabatic compression
Unochapecó Engº Ferrazza
Sistema 01 - Equações do Ciclo Frigorífico
■ Capacidade Frigorífica:
Qev = mRef x (h8sat – h5) ou
Qev = mCirc-Ev x (h7 – h6) ou
Qev = mCirc-Ev/nCirc x (h8sat – h6)Qev = mCirc-Ev/nCirc (h8sat – h6)
■ Potência Absorvida:
Wcp = mRef x (h2w – h1)
■ Calor Rejeitado:
Q = mRef x (h2 – h4)Unochapecó Engº Ferrazza
Sistema 01 - Equações do Ciclo Frigorífico
■ Rendimento Volumétrico do Compressor:
Vol.Comp
1Refvol
D
m v⋅=&
η
Rendimento Isoentrópico do Compressor :■ Rendimento Isoentrópico do Compressor :
1iso
12i2w h
hhh +−=
η
cp
12iRefiso
W
)h(hm −= •&η
12w
12iiso
hh
hh
−−=η
h2w , p2 � T2w
Unochapecó Engº Ferrazza
Sistema 02Duplo Estágio – Circ. por Bomba – RI Fechado
Unochapecó Engº Ferrazza
Sistema 02 – Condições de Operação
-10.0 nCIRC,HS [-] 5
-32.0 nCIRC,LS [-] 8
35.0 1.0
T9 [°C] -5
R717
0.5 1
0.2 0.2
Cooling capacity Q E,HS [kW] 573
Cooling capacity Q E,LS [kW] 516
COMPRESSOR PERFORMANCE
CYCLE CAPACITY
TEMPERATURE LEVELS
CYCLE SPECIFICATION
VS,HS :QE,HS : m HS :
TE,LS [°C] :
TC [°C] : ∆∆∆∆TSC [K] :
∆∆∆∆pSL,HS [K] :
∆∆∆∆pDL,HS [K] :
TE,HS [°C] : ∆∆∆∆pSL,LS [K] :
HS :
LS : VS,LS :QE,LS : m LS :
1696.0 [m 3/h]
1700.6 [m 3/h]
573.0 [kW]
516.0 [kW]
1.078 [kg/s]
0.414 [kg/s]
∆∆∆∆pDL,LS [K] :
LIQUID SUBCOOLING COIL PRESSURE LOSSES
REFRIGERANT
Power consumption W HS [kW] 359.7
Power consumption W LS [kW] 101.9
Discharge temperatur T 2 [°C] 86.9
Discharge temperature T 15 [°C] 64.4
Unuseful superheat ∆TSH,SL,HS [K] 5.0
SUCTION LINE
COMPRESSOR HEAT LOSS
COMPRESSOR PERFORMANCE
ηηηηIS,HS : WHS :
fQ,HS : T2 :
HS :
LS :
HS :
LS :
Unuseful superheat ∆TSH,SL,LS [K] 5.0
HS :
LS :
ηηηηIS,LS : WLS :
fQ,LS : T15 :
0.701 [-]
0.567 [-]
359.7 [kW]
101.9 [kW]
47.9 [%]
22.0 [%]
86.9 [°C]
64.4 [°C] 22.4 [kW]
172.5 [kW]QLOSS,HS :
QLOSS,LS :
∆∆∆∆TSH,SL,HS :
∆∆∆∆TSH,SL,LS :
5.00 [K]
5.00 [K]
WTOT : 461.6 [kW]
T1 :
T14 :
-5.0 [°C]
-27.0 [°C]
QSL,HS :
QSL,LS :
13580 [W]
4828 [W]
COP*HS : COP*LS :3.300 5.111COP : 2.359Unochapecó Engº Ferrazza
T4 :T2 :
TE,HS :
TC :
QE,HS :
QC :
WMT :
34.0 [°C]86.9 [°C]
-10.0 [°C]
35.0 [°C]
573.0 [kW]
1374.5 [kW]
359.7 [kW]
1.078 [kg/s]mTOT :
T9 : -5.0 [°C]
mCIRC,HS : 2.202 [kg/s]
> FLOODED EVAPORATORS, CLOSED INTERCOOLER, ONE-STAG E COMPRESSORSCYCLE ANALYSIS: TWO-STAGE CYCLE
SUBDIAGRAMWINDOWS
CoolPackLOG(p),h-DIAGRAM
2
15
3
8
4
9
Sistema 02 - Ciclo Frigorífico
6A
T1 :
E,HS
X5 :
E,HS
QE,LS :
WLS :
X10 :
T15 :
T14 : -27.0 [°C]
-5.0 [°C]
TE,LS : -32.0 [°C]
0.09 [kg/kg]
0.16 [kg/kg]
516.0 [kW]
101.9 [kW]
5
8nCIRC,LS :
nCIRC,HS :
64.4 [°C]
2.359
mCIRC,LS : 3.015 [kg/s]
R7170.56
0.47
3.300
5.111REFRIGERANT : COP :
COP*HS :
COP*LS :
nCARNOT,HS :
nCARNOT,LS :
Department ofMechanical Engineering
Technical Univ ersity
TOOL C.6
© 1999 - 2001
of Denmark
Version 1.46
14
5
16
1
6
1210
7
13
11
11A
Unochapecó Engº Ferrazza
Sistema 02 – Condições dos Pontos do Ciclo
2
3
4
5
6
86.9
86.9
34.0
-10.0
-10.0
-10.0
1361.7
1353.9
1353.9
290.9
290.9
290.9
1620.5
1620.8
345.4
345.4
133.2
393.4
STATE POINTS
8.4
8.3
588.9
-651.9
-5.0 1353.9 158.0 645.3
7
9
-
4.777
2.853
374.2 [kPa]
-3.7 [°C]
109.9 [°C]
149.3 [°C]
[°C] [kPa] [kJ/kg] [kg/m 3]
INTERMEDIATEPressure ratio (p 2 / p1 ) :
Pressure ratio (p 15 / p14 ) :
STATE POINTTEMPERATURE PRESSURE ENTHALPY DENSITY
PRESSURE
HIGH PRESSURE
pOPTIMUM :
pOPTIMUM = p2 · p13
TSAT,OPTIMUM :
Additional information
T2,IS :
T :
-5.0
-10.0
285.1
290.9
1446.7
1434.1
2.3
2.4
-32.0
-32.0
-32.0
-32.0
-27.0
64.4
11
15
108.1
108.1
108.1
108.1
102.8
293.3
158.0
34.3
205.5
1403.5
1415.2
1607.1
-679.8
-0.9
0.9
1.8
8
1
10
12
13
14
64.4 290.9 1607.2 1.816
3.300 5.1112.359
149.3 [°C]
41.5 [°C]
88.0 [°C]
COP : COP*HS : COP*LS :
LOW PRESSURE
T2,W :
T15,IS :
T15,W :
TIS is the temperature of thedischarge gas assuming reversibleand adiabatic compression
TW is the temperature of thedischarge gas assuming real andadiabatic compression
Unochapecó Engº Ferrazza
Sistema 02 – Balanços de Fluxos
■ Resfriador Intermediário:
QRI-evap = mCP-B x (h15 – h8sat) + mCP-B x (h4 – h9)
)h(hm)h(hmm 94B-CP8Sat15B-CP −+−= ••
−&&
&
)h(hm
58Sat
94B-CP8Sat15B-CPevapRI −
=−&
■ Lado de Alta:
mCP-A = mCP-B + mRI-evap + mEV-A
Unochapecó Engº Ferrazza
Sistema 03Duplo Estágio – Circ. por Bomba – RI Aberto
Unochapecó Engº Ferrazza
Sistema 03 – Condições de Operação
-10.0 XOUT [kg/kg] 1
-40.0 nCIRC [-] 12
35.0 1.0
0.5
0.2
1
0.2
R717
Cooling capacity Q E,HS [kW] 0
Cooling capacity Q E,LS [kW] 853.1
COMPRESSOR PERFORMANCE
CYCLE CAPACITY
TEMPERATURE LEVELS
CYCLE SPECIFICATIONPRESSURE LOSSES
VS,HS :QE,HS : m HS :
TE,LS [°C] :
TC [°C] : ∆∆∆∆TSC [K] :
∆∆∆∆pSL,HS [K] :
∆∆∆∆pDL,HS [K] :
TE,HS [°C] : ∆∆∆∆pSL,LS [K] :
HS :
LS : VS,LS :QE,LS : m LS :
1467.7 [m 3/h]
3998.9 [m 3/h]
0.0 [kW]
853.1 [kW]
0.915 [kg/s]
0.677 [kg/s]
∆∆∆∆pDL,LS [K] :
HS :
LS :
REFRIGERANT
Power consumption W HS [kW] 271.4
Power consumption W LS [kW] 205
Discharge temperature T 2 [°C]
SUCTION LINES
COMPRESSOR HEAT LOSS
COMPRESSOR PERFORMANCE
ηηηηIS,HS : WHS :
fQ,HS : T2 :
HS :
LS :
81.9
Discharge temperature T 14 [°C]
HS :
LS :
HS :
LS :
ηηηη IS,LS : WLS :
fQ,LS : T14 :
0.800 [-]
0.635 [-]
271.4 [kW]
205.0 [kW]
45.7 [%]
34.3 [%]
81.9 [°C]
62.0 [°C] 70.4 [kW]
124.1 [kW]QLOSS,HS :
QLOSS,LS :
QSL,HS :
QSL,LS : 7629 [W]
11495 [W]
WTOT : 476.4 [kW]
62
Unuseful superheat ∆TSH,SL,HS [K] 5.0
Unuseful superheat ∆TSH,SL,LS [K]
T1 :
T13 :
-5.5 [°C]
-34.5 [°C]
∆∆∆∆TSH,SL,HS :
∆∆∆∆TSH,SL,LS :
5.0 [K]
5.0 [K]5.0
COP : COP*HS : COP*LS :1.791 3.71 4.199Unochapecó Engº Ferrazza
Sistema 03 - Ciclo Frigorífico
2
14
3
CYCLE ANALYSIS: TWO-STAGE CYCLE
T4 :
T2 :
TC :QC :
WHS :
8
4
34.0 [°C]
81.9 [°C]
35.0 [°C]1154.5 [kW]
271.4 [kW]
mTOT : 0.915 [kg/s]
mCIRC,HS : 0.000 [kg/s]
> FLOODED EVAPORATORS, OPEN INTERCOOLER, ONE-STAGE COMPRESSORS
SUBDIAGRAMWINDOWS
CoolPackLOG(p),h-DIAGRAM
13
5
15
14
1 T1 :
TE,HS :
X5 :
QE,HS :6
119
8
7
12QE,LS :
WLS :
X9 :
T14 :
T13 : -34.5 [°C]
-5.5 [°C]
-10.0 [°C]
TE,LS : -40.0 [°C]
0.09 [kg/kg]
0.16 [kg/kg]
0.0 [kW]
853.1 [kW]
205.0 [kW]
1.000 [-]
12.000 [-]nCIRC,LS :
nCIRC,HS :
10
62.0 [°C]
mCIRC,LS : 7.367 [kg/s]
REFRIGERANT : R717 COP :COP*HS :
COP*LS :1.791
nCARNOT,HS :
nCARNOT,LS :
0.63
0.54
3.71
4.199
Department ofMechanical Engineering
Technical Univ ersity
TOOL C.5
© 1999 - 2001
of Denmark
Version 1.46
10A
Unochapecó Engº Ferrazza
Sistema 03 - Ciclo Frigorífico
2
14
3
CYCLE ANALYSIS: TWO-STAGE CYCLE
T4 :
T2 :
TC :QC :
WHS :
8
4
34.0 [°C]
81.9 [°C]
35.0 [°C]1154.5 [kW]
271.4 [kW]
mTOT : 0.915 [kg/s]
mCIRC,HS : 0.000 [kg/s]
> FLOODED EVAPORATORS, OPEN INTERCOOLER, ONE-STAGE COMPRESSORS
SUBDIAGRAMWINDOWS
CoolPackLOG(p),h-DIAGRAM
16
17
1819
13
5
15
14
1 T1 :
TE,HS :
X5 :
QE,HS :6
119
8
7
12QE,LS :
WLS :
X9 :
T14 :
T13 : -34.5 [°C]
-5.5 [°C]
-10.0 [°C]
TE,LS : -40.0 [°C]
0.09 [kg/kg]
0.16 [kg/kg]
0.0 [kW]
853.1 [kW]
205.0 [kW]
1.000 [-]
12.000 [-]nCIRC,LS :
nCIRC,HS :
10
62.0 [°C]
mCIRC,LS : 7.367 [kg/s]
REFRIGERANT : R717 COP :COP*HS :
COP*LS :1.791
nCARNOT,HS :
nCARNOT,LS :
0.63
0.54
3.71
4.199
Department ofMechanical Engineering
Technical Univ ersity
TOOL C.5
© 1999 - 2001
of Denmark
Version 1.46
10A
20
Unochapecó Engº Ferrazza
Sistema 03 – Condições dos Pontos do Ciclo
2
3
4
5
6
81.9
81.9
34.0
-10.5
-10.5
-10.5
-10.5
1361.7
1353.9
1353.9
285.1
285.1
285.1
285.1
1607.1
1607.4
345.4
345.4
130.9
1433.5
1433.5
STATE POINTS
8.5
8.5
588.9
652.6
-2.3
-
7
8
4.127
4.876
308.0 [kPa]
-8.6 [°C]
111.0 [°C]
134.3 [°C]
[°C] [kPa] [kJ/kg] [kg/m 3]
INTERMEDIATEPressure ratio (p 2 / p1 ) :
Pressure ratio (p 14 / p13 ) :
STATE POINTTEMPERATURE PRESSURE ENTHALPY DENSITY
PRESSURE
HIGH PRESSURE
pOPTIMUM :
pOPTIMUM = p2 · p13
TSAT,OPTIMUM :
Additional information
T2,IS :
T :-5.5 279.3 1446.1 2.2
62.0
-39.5
-39.5
-34.5
62.0
-39.5
-39.5
10
11
73.5
285.1
73.5
73.5
69.6
287.4
73.5
130.9
1602.0
2.1
1391.6
1402.9
1601.9
117.9
688.9
1.8
-
0.6
1.8
9
1
15
12
13
14
-0.7
COP : COP*HS : COP*LS :1.791 3.71 4.199
59.1 [°C]
134.3 [°C]
107.4 [°C]
LOW PRESSURE
T2,W :
T14,IS :
T14,W :
TIS is the temperature of thedischarge gas assuming reversibleand adiabatic compression
TW is the temperature of thedischarge gas assuming real andadiabatic compression
Unochapecó Engº Ferrazza
Sistema 03 – Balanços de Fluxos
■ Resfriador Intermediário:
QRI-evap = mCP-B x (h15 – h8sat)
)h(hmm 8Sat15B-CP
evapRI
−= •
−&
&
)h(hm
58SatevapRI −
=−&
■ Lado de Alta:
mCP-A = mCP-B + mRI-evap
Unochapecó Engº Ferrazza
Sistema 03 – Degelo c/ Gás Quente (∆PGQ= 2 bar)
■ Linha de Descarga:
P16 = P3 – ∆PGQ = 1154 kPa abs
h16 = h3 = 1607.4 kJ/kg
P16 , h16 � T16 = 72.4 ºCP16 , h16 � T16 = 72.4 ºC
T19 ~ +5.0 ºC � h19 =222.9 kJ/kg
∆hGQ-LD = h16 – h19 = 1384.5 kJ/kgUnochapecó Engº Ferrazza
Sistema 03 – Degelo c/ Gás Quente (∆PGQ= 2 bar)
■ Linha de “Gás Úmido” (Topo do Rec. Liq):
P18 = P17sat – ∆PGQ = 1150 kPa abs
h18 = h17sat = 1487.6 kJ/kg
P18 , h18 � T18 =30.4 ºCP18 , h18 � T18 =30.4 ºC
T19 ~ +5.0 ºC � h19 = 222.9 kJ/kg
∆hGQ-RL = h18 – h19 = 1264.7 kJ/kgUnochapecó Engº Ferrazza
Ciclos FrigoríficosCiclo de Duplo Estágio com Sistema de Circulação por Bomba nos Evaporadores de Baixa Pressão
Unochapecó Engº Ferrazza
Sistema 04Sistema Cascata – R-744/ R-717
Unochapecó Engº Ferrazza
Sistema 04Sistema Cascata – R-744/ R-717
Unochapecó Engº Ferrazza
Sistema 04 – Condições de Operação
-8.0 0.0
-45.0 0.0
35.5 2.0
-4.8 2.0
No SGHX 0
No SGHX 0
0.10 0.10
0.10 0.00
R717 R744
Cooling Capacity Q E,HT [kW] 0
Cooling Capacity Q [kW] 684.4
CYCLE CAPACITY
TEMPERATURE LEVELS
CYCLE SPECIFICATIONSUCTION GAS HEAT EXCHANGER (HT)
VS,HT :QE,HT : m HT :
TE,LT [°C] : ∆∆∆∆TSH,LT [K] :
TC,HT [°C] : ∆∆∆∆TSC,HT [K] :
∆∆∆∆pSL,HT [K] :
∆∆∆∆pDL,HT [K] :
TE,HT [°C] : ∆∆∆∆TSH,HT [K] : ∆∆∆∆pSL,LT [K] :
HT :
LT : V :Q : m :
1155 [m 3/h]
469.7 [m3/h]
902.1 [kW]
684.4 [kW]
0.8248 [kg/s]
2.733 [kg/s]
∆∆∆∆pDL,LT [K] :
∆∆∆∆TSC,HT [K] :TC,LT [°C] :
PRESSURE LOSSES
HT : LT :
REFRIGERANTS
SUCTION GAS HEAT EXCHANGER (LT)
Cooling Capacity QE,LT [kW] 684.4
Power consumption W HT [kW] 228.9
Power consumption W LT [kW] 204.1
Heat loss factor f Q,HT [%] 0
Heat loss factor f Q,LT [%] 0
Unuseful superheat ∆TSH,SL,HT [K] 1.0
SUCTION LINES
COMPRESSOR HEAT LOSS
COMPRESSOR PERFORMANCE
ηηηηIS,HT : WHT :
fQ,HT : T2,HT :
LT :
HT :
LT :
HT :
LT :
VS,LT :QE,LT : mLT :
ηηηηIS,LT : WLT :
fQ,LT : T2,LT :
469.7 [m3/h]684.4 [kW] 2.733 [kg/s]
0.773 [-]
0.804 [-]
228.9 [kW]
204.1 [kW]
0.0 [%]
0.0 [%]
123.1 [°C]
61.2 [°C] 0.0 [kW]
0.0 [kW]QLOSS,HT :
QLOSS,LT :
QSL,HT :
QSL,LT : Unuseful superheat ∆TSH,SL,LT [K] 5.0
2116 [W]
13576 [W]
WTOT : 433 [kW]
HT :
LT :
T8,HT :
T8,LT :
-7.0 [°C]
-40.0 [°C]
∆∆∆∆TSH,SL,HT :
∆∆∆∆TSH,SL,LT :
1.0 [K]
5.0 [K]
COPLT : 3.353COPHT : 3.941Unochapecó Engº Ferrazza
Sistema 04 - Ciclo Frigorífico
CYCLE ANALYSIS : COMBINATION OF ONE-STAGE CYCLES
T5,LT :
TC,HT :QC,HT :
WHT :
T2,HT :
-6.8 [°C]
123.1 [°C]
35.5 [°C]1131.0 [kW]
228.9 [kW]
0.8248 [kg/s]mHT :
T5,HT : 33.5 [°C]
T2,LT : 61.2 [°C]
> TWO-STAGE CASCADE SYSTEM, DX EVAPORATORS
Q4-5,HT : 0.00 [kW]
Q4-5,LT : 0.00 [kW]
2HT4HT
3HT
5HT
SUB-DIAGRAMWINDOWS
CoolPackLOG(p),h-DIAGRAM
T4,HT : 33.5 [°C]
T4,LT : -6.8 [°C]
T1,HT :
TE,HT :QE,HT :
COP*HT :
QE,LT : WLT :
X6,LT :
-8.1 [°C]
T8,HT : -7.0 [°C]
-8.0 [°C]
TE,LT : -45.0 [°C]
0.24 [kg/kg]
902.1 [kW]
684.4 [kW] 204.1 [kW]
COP*LT :
3.940
3.420
2.733 [kg/s]mLT :
X6,HT : 0.15 [kg/kg]
T1,LT : -40.0 [°C]
T2,LT : 61.2 [°C]
TC,LT :QC,LT : -4.8 [°C]902.1 [kW]
COPHT : 3.941REFRIGERANTHT :
REFRIGERANTLT :
R717
R744
ηηηηCARNOT,HT :
ηηηηCARNOT,LT :
0.65
0.60COPLT : 3.353
Q4-5,LT : 0.00 [kW]
T8,LT : -40.0 [°C]
1HT
6HT
8HT
7HT
9
WINDOWS
Department ofMechanical Engineering
Technical Univ ersity
TOOL C.10
© 1999 - 2001
of Denmark
Version 1.46
4LT5LT
6LT
1HT8LT
7LT
2LT
3LT
6A
6
Unochapecó Engº Ferrazza
Sistema 04 – Condições dos Pontos do Ciclo
2
3
4
5
6
123.1
123.1
33.5
33.5
-8.0
-8.0
1377.4
1373.4
1373.4
1373.4
315.5
315.5
1714.0
1714.1
342.9
342.9
342.9
1436.6
STATE POINTS
7.5
7.5
589.7
589.7
-2.67
61.2
61.2
-6.8
-6.8
-45.0
-45.0
3062.5
3062.5
3062.5
3062.5
831.9
831.9
7.0
7.0
-323.0
-323.0
-323.0
-72.6
54.5
54.5
967.2
967.2
-21.7
TEMPERATURE PRESSURE ENTHALPY DENSITYSTATE POINT
[°C] [kPa] [kJ/kg] [kg/m 3]
TEMPERATURE PRESSURE ENTHALPY DENSITYSTATE POINT
[°C] [kPa] [kJ/kg] [kg/m 3]
HIGH TEMPERATURE (HT) LOW TEMPERATURE (LT)
2
3
4
5
6
7-8.0
-8.1
315.5
314.2
1436.6
1436.5
2.6
2.6
7
9
1 -8.1 314.2 -8.1 2.6
-45.0
-
831.9
-
-72.6
-
21.7
--40.0 828.6 -67.7 20.9
4.384
3.696
-7.0 314.2 1439.2 2.68 -40.0 828.6 -67.7 20.9
COPLT : 3.353COPHT : 3.941
98.7 [°C]
47.6 [°C]
123.1 [°C]
61.2 [°C]
7
9
1
8
Pressure ratio - LT (p 2 / p1 ) [-] :
Pressure ratio - HT (p 2 / p1 ) [-] :
ADDITIONAL INFORMATION
T2,IS,HT :
T2,IS,LT :
T2,W,HT :
T2,W,LT :
Unochapecó Engº Ferrazza
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