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Termodinamica - Yunes Cengel y Michael Boles - Septima Edicion

Book of thermodynamic

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Presión, MPa

931

APÉNDICE 1

100 150 200 250 300 350 400 450 500 550 600 650 700 750

20

20

10

4

2

1

0.4

0.2

0.1

0.04

0.02

1500

0.64

–60

R-134a

0.72

1450

0.80

0.1

–40

líquido saturado

1400

0.88

0.2

–20

1350

0.96

0.3

T = 0°C

1300

1.04

0.4

1250

1.12

20

X = 0.5

1.20

1200 kg/m 3

40

1150

1.28

0.6

1100

60

1.36

0.7

1050

1.44

0.8

1000

80

1.52

0.9

950

100

900

1.60

850

800 800

1.68

–40

vapor saturado

1.76

–20

700

1.84

0

20

0.01 0.01

100 150 200 250 300 350 400 450 500 550 600 650 700 750

Entalpía, kJ/kg

FIGURA A-14

Diagrama P-h para el refrigerante 134a.

600

500

1.92

40

2.00

60

80

2.08

100

120

s = 2.16 kJ/kgK kJ/kgK

140

400

T = 160°C

2.24

180

2.48

2.32

200

220

2.40 2.40

s = 2.56

2.56

240

260

2.48 2.48

2.64

2.64

300

Densidad = 200 kg/m 3

Nota: El punto de referencia utilizado para la gráfica es diferente al empleado en las tablas de R-134a. Por lo tanto, los problemas deberán resolverse

utilizando todos los datos de propiedades obtenidos, ya sea de las tablas o de la gráfica, pero no de ambas.

Reimpreso con autorización de la American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, Georgia.

280

160

120

2.72

2.72

90

70

60

50

40

300

32

24

16

12

8

6

4

3.2

2.4

1.6

1.2

0.8

0.6

0.4

0.3

10

4

2

1

0.4

0.2

0.1

0.04

0.02

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