Refrigerant 134a (Tetrafluoroethane) properties of saturated liquid and saturated vapor

From ASHRAE (1997), with permission

Click here to see the properties of superheated R-134a

Values shown in blue are at the triple point
Values shown in red are at the boiling point
Values shown in bold are at the critical point

Temp., °F

Pressure, psia

Density, lb/ft3

Volume, ft3/lb

Enthalpy, Btu/lb

Entropy, Btu/lb·°F

Specific heat, cp, Btu/lb·°F

cp/cv

Velocity of sound, ft/s

Viscosity, lbm/ft·h

Thermal cond., Btu/h·ft·°F

Surface tension, dyne/cm

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

-153.94

0.057

99.34

564.85

32.989

80.235

0.09154

0.27880

0.2740

0.1397

1.1628

3723

416

5.289

0.0160

28.15

-150

0.072

98.95

449.29

31.902

80.783

0.08801

0.27588

0.2776

0.1409

1.1615

3670

418

4.913

0.0163

27.76

-140

0.130

97.98

259.15

29.093

82.190

0.07908

0.26903

0.2837

0.1438

1.1583

3552

424

4.117

0.0168

26.78

-130

0.222

97.01

155.69

26.238

83.618

0.07029

0.26294

0.2870

0.1467

1.1554

3448

430

3.497

0.0173

25.81

-120

0.367

96.05

97.027

23.359

85.066

0.06169

0.25752

0.2886

0.1497

1.1528

3352

436

3.006

0.0179

24.86

-110

0.586

95.09

62.509

20.467

86.531

0.05330

0.25270

0.2895

0.1527

1.1507

3261

441

2.613

0.0184

23.92

-100

0.906

94.13

41.496

17.569

88.011

0.04513

0.24842

0.2900

0.1559

1.1489

3173

446

2.292

0.0190

22.99

-90

1.363

93.17

28.303

14.665

89.504

0.03717

0.24462

0.2906

0.1591

1.1475

3087

451

2.028

0.0195

0.0721

22.08

-80

1.997

92.21

19.783

11.755

91.005

0.02940

0.24125

0.2913

0.1624

1.1466

3001

456

1.808

0.0200

0.0706

21.17

-75

2.396

91.73

16.680

10.297

91.759

0.02559

0.23972

0.2917

0.1641

1.1463

2959

458

1.712

0.0203

0.0699

20.73

-70

2.859

91.25

14.138

8.837

92.514

0.02182

0.23827

0.2922

0.1658

1.1462

2916

460

1.623

0.0206

0.0691

20.28

-65

3.393

90.77

12.045

7.374

93.270

0.01809

0.23691

0.2928

0.1676

1.1461

2874

462

1.542

0.0209

0.0684

19.84

-60

4.006

90.28

10.310

5.907

94.026

0.01440

0.23563

0.2935

0.1694

1.1462

2832

464

1.466

0.0212

0.0677

0.00405

19.40

-55

4.707

89.80

8.8656

4.437

94.783

0.01075

0.23443

0.2943

0.1712

1.1465

2790

466

1.396

0.0214

0.0669

0.00423

18.96

-50

5.505

89.31

7.6569

2.963

95.539

0.00713

0.23331

0.2951

0.1731

1.1468

2747

468

1.331

0.0217

0.0662

0.00440

18.52

-45

6.409

88.82

6.6405

1.484

96.295

0.00355

0.23225

0.2960

0.1750

1.1473

2705

470

1.271

0.0220

0.0654

0.00457

18.09

-40

7.429

88.32

5.7819

0.000

97.050

0.00000

0.23125

0.2970

0.1769

1.1479

2663

471

1.215

0.0223

0.0647

0.00473

17.66

-35

8.577

87.83

5.0533

1.489

97.804

0.00352

0.23032

0.2981

0.1789

1.1487

2621

473

1.163

0.0225

0.0639

0.00489

17.23

-30

9.862

87.33

4.4325

2.984

98.556

0.00701

0.22945

0.2992

0.1810

1.1497

2579

474

1.113

0.0228

0.0632

0.00505

16.81

-25

11.297

86.82

3.9014

4.484

99.306

0.01048

0.22863

0.3004

0.1831

1.1508

2536

476

1.068

0.0231

0.0625

0.00521

16.38

Temp., °F

Pressure, psia

Density, lb/ft3

Volume, ft3/lb

Enthalpy, Btu/lb

Entropy, Btu/lb·°F

Specific heat, cp, Btu/lb·°F

cp/cv

Velocity of sound, ft/s

Viscosity, lbm/ft·h

Thermal cond., Btu/h·ft·°F

Surface tension, dyne/cm

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

-20

12.895

86.32

3.4452

5.991

100.054

0.01392

0.22786

0.3017

0.1852

1.1521

2494

477

1.024

0.0234

0.0617

0.00536

15.96

-15

14.667

85.81

3.0519

7.505

100.799

0.01733

0.22714

0.3031

0.1874

1.1535

2452

478

0.984

0.0237

0.0610

0.00550

15.54

-14.92

14.696

85.80

3.0462

7.529

100.811

0.01739

0.22713

0.3031

0.1874

1.1535

2451

478

0.983

0.0237

0.0610

0.00551

15.54

-10

16.626

85.29

2.7116

9.026

101.542

0.02073

0.22647

0.3045

0.1897

1.1552

2410

479

0.946

0.0240

0.0602

0.00565

15.13

-5

18.787

84.77

2.4161

10.554

102.280

0.02409

0.22584

0.3060

0.1920

1.1570

2367

480

0.910

0.0243

0.0595

0.00579

14.71

0

21.162

84.25

2.1587

12.090

103.015

0.02744

0.22525

0.3075

0.1943

1.1590

2325

481

0.876

0.0245

0.0588

0.00593

14.30

5

23.767

83.72

1.9337

13.634

103.745

0.03077

0.22470

0.3091

0.1968

1.1613

2283

481

0.843

0.0248

0.0580

0.00607

13.89

10

26.617

83.18

1.7365

15.187

104.471

0.03408

0.22418

0.3108

0.1993

1.1637

2240

482

0.813

0.0251

0.0573

0.00621

13.48

15

29.726

82.64

1.5630

16.748

105.192

0.03737

0.22370

0.3126

0.2018

1.1664

2198

482

0.784

0.0254

0.0565

0.00635

13.08

20

33.110

82.10

1.4101

18.318

105.907

0.04065

0.22325

0.3144

0.2045

1.1694

2155

482

0.756

0.0257

0.0558

0.00649

12.67

25

36.785

81.55

1.2749

19.897

106.617

0.04391

0.22283

0.3162

0.2072

1.1726

2113

482

0.730

0.0260

0.0550

0.00662

12.27

30

40.768

80.99

1.1550

21.486

107.320

0.04715

0.22244

0.3182

0.2100

1.1761

2070

482

0.705

0.0263

0.0543

0.00676

11.87

35

45.075

80.42

1.0484

23.085

108.016

0.05038

0.22207

0.3202

0.2129

1.1799

2027

482

0.681

0.0267

0.0536

0.00690

11.48

40

49.724

79.85

0.9534

24.694

108.705

0.05359

0.22172

0.3223

0.2159

1.1841

1985

482

0.658

0.0270

0.0528

0.00704

11.08

45

54.732

79.26

0.8685

26.314

109.386

0.05679

0.22140

0.3244

0.2190

1.1886

1942

481

0.636

0.0273

0.0521

0.00718

10.69

50

60.116

78.67

0.7925

27.944

110.058

0.05998

0.22110

0.3267

0.2222

1.1935

1899

481

0.615

0.0276

0.0513

0.00732

10.30

55

65.895

78.07

0.7243

29.586

110.722

0.06316

0.22081

0.3290

0.2255

1.1988

1856

480

0.595

0.0280

0.0506

0.00746

9.91

60

72.087

77.46

0.6630

31.239

111.376

0.06633

0.22054

0.3314

0.2289

1.2046

1813

479

0.576

0.0283

0.0499

0.00761

9.53

65

78.712

76.84

0.6077

32.905

112.019

0.06949

0.22028

0.3339

0.2325

1.2109

1770

477

0.557

0.0286

0.0491

0.00776

9.15

70

85.787

76.21

0.5577

34.583

112.652

0.07264

0.22003

0.3366

0.2363

1.2178

1726

476

0.539

0.0290

0.0484

0.00791

8.77

Temp., °F

Pressure, psia

Density, lb/ft3

Volume, ft3/lb

Enthalpy, Btu/lb

Entropy, Btu/lb·°F

Specific heat, cp, Btu/lb·°F

cp/cv

Velocity of sound, ft/s

Viscosity, lbm/ft·h

Thermal cond., Btu/h·ft·°F

Surface tension, dyne/cm

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

75

93.333

75.57

0.5125

36.274

113.272

0.07578

0.21979

0.3393

0.2402

1.2252

1683

474

0.522

0.0294

0.0476

0.00806

8.39

80

101.370

74.91

0.4715

37.978

113.880

0.07892

0.21957

0.3422

0.2444

1.2334

1640

472

0.505

0.0297

0.0469

0.00822

8.02

85

109.920

74.25

0.4343

39.697

114.475

0.08205

0.21934

0.3453

0.2487

1.2424

1596

470

0.489

0.0301

0.0462

0.00838

7.65

90

119.000

73.57

0.4004

41.430

115.055

0.08518

0.21912

0.3485

0.2533

1.2522

1552

468

0.473

0.0305

0.0454

0.00855

7.28

95

128.630

72.87

0.3694

43.179

115.619

0.08830

0.21890

0.3519

0.2582

1.2630

1509

466

0.458

0.0309

0.0447

0.00872

6.91

100

138.830

72.16

0.3411

44.943

116.166

0.09142

0.21868

0.3555

0.2633

1.2748

1465

463

0.443

0.0313

0.0439

0.00890

6.55

105

149.630

71.43

0.3153

46.725

116.694

0.09454

0.21845

0.3594

0.2689

1.2880

1421

460

0.428

0.0318

0.0432

0.00908

6.20

110

161.050

70.68

0.2915

48.524

117.203

0.09766

0.21822

0.3635

0.2748

1.3026

1376

457

0.414

0.0322

0.0425

0.00926

5.84

115

173.110

69.91

0.2697

50.343

117.690

0.10078

0.21797

0.3680

0.2812

1.3189

1332

454

0.400

0.0327

0.0417

0.00946

5.49

120

185.840

69.12

0.2497

52.181

118.153

0.10391

0.21772

0.3728

0.2881

1.3372

1288

450

0.387

0.0332

0.0410

0.00965

5.15

125

199.250

68.31

0.2312

54.040

118.591

0.10704

0.21744

0.3781

0.2957

1.3577

1243

446

0.374

0.0338

0.0403

0.00986

4.80

130

213.380

67.47

0.2141

55.923

119.000

0.11018

0.21715

0.3839

0.3040

1.3810

1198

442

0.361

0.0343

0.0395

0.01007

4.47

135

228.250

66.60

0.1983

57.830

119.377

0.11333

0.21683

0.3903

0.3133

1.4075

1153

437

0.348

0.0349

0.0388

0.01029

4.13

140

243.880

65.70

0.1836

59.764

119.720

0.11650

0.21648

0.3974

0.3236

1.4379

1108

432

0.335

0.0356

0.0380

0.01052

3.81

145

260.310

64.77

0.1700

61.727

120.024

0.11968

0.21609

0.4053

0.3353

1.4731

1062

427

0.323

0.0363

0.0373

0.01075

3.48

150

277.570

63.80

0.1574

63.722

120.284

0.12288

0.21566

0.4144

0.3486

1.5143

1017

421

0.311

0.0370

0.0366

0.01100

3.17

155

295.690

62.78

0.1455

65.752

120.495

0.12611

0.21517

0.4247

0.3640

1.5630

971

416

0.298

0.0378

0.0358

0.01125

2.86

160

314.690

61.72

0.1345

67.823

120.650

0.12938

0.21463

0.4368

0.3821

1.6213

924

409

0.286

0.0387

0.0351

0.01151

2.55

165

334.620

60.60

0.1241

69.939

120.739

0.13268

0.21400

0.4511

0.4036

1.6921

877

403

0.274

0.0397

0.0343

0.01178

2.26

170

355.510

59.42

0.1144

72.106

120.753

0.13603

0.21329

0.4683

0.4299

1.7798

829

396

0.262

0.0407

0.0336

0.01206

1.97

Temp., °F

Pressure, psia

Density, lb/ft3

Volume, ft3/lb

Enthalpy, Btu/lb

Entropy, Btu/lb·°F

Specific heat, cp, Btu/lb·°F

cp/cv

Velocity of sound, ft/s

Viscosity, lbm/ft·h

Thermal cond., Btu/h·ft·°F

Surface tension, dyne/cm

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

Vapor

Liquid

Vapor

Liquid

Vapor

Liquid

Vapor

175

377.400

58.16

0.1052

74.335

120.677

0.13945

0.21247

0.4896

0.4627

1.8908

781

388

0.249

0.0420

0.0329

0.01235

1.69

180

400.340

56.80

0.0965

76.636

120.493

0.14295

0.21151

0.5168

0.5048

2.0354

731

380

0.237

0.0434

0.0321

0.01265

1.41

185

424.370

55.33

0.0881

79.027

120.175

0.14655

0.21037

0.5527

0.5612

2.2309

680

372

0.224

0.0450

0.0314

0.01296

1.15

190

449.550

53.70

0.0801

81.534

119.684

0.15029

0.20901

0.6031

0.6406

2.5087

627

363

0.211

0.0469

0.90

195

475.950

51.86

0.0723

84.196

118.963

0.15423

0.20733

0.6794

0.7612

2.9338

572

353

0.197

0.0493

0.67

200

503.640

49.70

0.0646

87.088

117.906

0.15847

0.20519

0.8100

0.9673

3.6640

514

343

0.182

0.0523

0.45

205

532.720

47.00

0.0566

90.368

116.289

0.16326

0.20226

1.0906

1.4042

5.2174

450

331

0.164

0.0566

0.25

210

563.340

43.03

0.0474

94.548

113.411

0.16933

0.19750

378

316

0.142

0.0639

0.09

213.85

588.270

32.04

0.0312

103.775

103.775

0.18128

0.18128

inf.

inf.

inf.

0

0

inf.

inf.

0