Appendix C: Thermodynamic Properties of R134a

Table C1: Saturated R134a

T (oC)

P (MPa)

Specific Volume

m3/kg

Specific Internal Energy

kJ/kg

Specific Enthalpy

kJ/kg

Specific Entropy

kJ/kgK

vf

vg

uf

ug

hf

hg

sf

sg

-70

0.00798

0.000666

2.058960

111.19

338.59

111.20

355.02

0.6262

1.8264

-65

0.01138

0.000672

1.476490

117.26

341.35

117.27

358.16

0.6557

1.8130

-60

0.01591

0.000678

1.079030

123.35

344.15

123.36

361.31

0.6846

1.8010

-55

0.02183

0.000685

0.802362

129.49

346.96

129.50

364.48

0.7131

1.7902

-50

0.02945

0.000691

0.606198

135.65

349.80

135.67

367.65

0.7410

1.7806

-45

0.03912

0.000698

0.464726

141.86

352.65

141.89

370.83

0.7685

1.7720

-40

0.05121

0.000705

0.361076

148.11

355.51

148.14

374.00

0.7956

1.7643

-35

0.06614

0.000713

0.284018

154.40

358.38

154.45

377.17

0.8223

1.7575

-30

0.08438

0.000720

0.225945

160.73

361.25

160.79

380.32

0.8486

1.7515

-25

0.10640

0.000728

0.181623

167.11

364.13

167.19

383.45

0.8746

1.7461

-20

0.13274

0.000736

0.147395

173.54

366.99

173.64

386.55

0.9002

1.7413

-15

0.16394

0.000745

0.120671

180.02

369.85

180.14

389.63

0.9256

1.7371

-10

0.20060

0.000754

0.099590

186.55

372.69

186.70

392.67

0.9506

1.7334

-5

0.24334

0.000763

0.082801

193.13

375.51

193.32

395.66

0.9754

1.7300

0

0.29280

0.000772

0.069309

199.77

378.31

200.00

398.60

1.0000

1.7271

5

0.34966

0.000782

0.058374

206.48

381.08

206.75

401.49

1.0243

1.7245

10

0.41461

0.000793

0.049442

213.25

383.82

213.58

404.32

1.0485

1.7221

15

0.48837

0.000804

0.042090

220.09

386.52

220.48

407.07

1.0724

1.7200

20

0.57171

0.000816

0.035997

227.00

389.17

227.47

409.75

1.0962

1.7180

25

0.66538

0.000829

0.030912

233.99

391.77

234.55

412.33

1.1199

1.7162

30

0.77020

0.000842

0.026642

241.07

394.30

241.72

414.82

1.1435

1.7145

35

0.88698

0.000857

0.023033

248.25

396.76

249.01

417.19

1.1670

1.7128

40

1.01659

0.000872

0.019966

255.52

399.13

256.41

419.43

1.1905

1.7111

45

1.15992

0.000889

0.017344

262.91

401.40

263.94

421.52

1.2139

1.7092

50

1.31791

0.000907

0.015089

270.43

403.55

271.62

423.44

1.2375

1.7073

55

1.49151

0.000927

0.013140

278.09

405.56

279.47

425.15

1.2611

1.7050

60

1.68178

0.000950

0.011444

285.91

407.38

287.51

426.63

1.2848

1.7024

65

1.88982

0.000975

0.009960

293.92

408.99

295.76

427.82

1.3088

1.6994

70

2.11683

0.001004

0.008653

302.16

410.33

304.28

428.65

1.3332

1.6956

75

2.36412

0.001037

0.007491

310.68

411.32

313.13

429.03

1.3580

1.6910

80

2.63320

0.001077

0.006448

319.55

411.83

322.39

428.81

1.3836

1.6850

85

2.92583

0.001127

0.005499

328.93

411.67

332.22

427.76

1.4104

1.6771

90

3.24418

0.001194

0.004613

339.06

410.45

342.93

425.42

1.4390

1.6662

95

3.59123

0.001294

0.003743

350.60

407.23

355.25

420.67

1.4715

1.6493

100

3.97238

0.001536

0.002681

367.20

397.03

373.30

407.68

1.5188

1.6109

101.06

4.05911

0.001954

0.001954

381.71

381.71

389.64

389.64

1.5621

1.5621

Table C2: Superheated R134a

T (oC)

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

 

P = 50 kPa (Sat. T = -40.45 oC)

P = 100 kPa (Sat. T = -26.36 oC)

Sat

0.369253

355.25

373.72

1.7650

0.192558

363.34

382.60

1.7475

-20

0.404876

368.97

389.21

1.8288

0.198410

367.81

387.65

1.7677

-10

0.421989

375.89

396.99

1.8590

0.207433

374.89

395.64

1.7986

0

0.438974

382.98

404.93

1.8885

0.216303

382.10

403.73

1.8288

10

0.455859

390.22

413.02

1.9176

0.225060

389.45

411.95

1.8584

20

0.472664

397.64

421.27

1.9463

0.233731

396.94

420.31

1.8874

30

0.489404

405.22

429.69

1.9745

0.242333

404.59

428.82

1.9160

40

0.506090

412.97

438.28

2.0024

0.250878

412.40

437.49

1.9441

50

0.522731

420.89

447.03

2.0299

0.259376

420.37

446.30

1.9718

60

0.539334

428.98

455.94

2.0571

0.267835

428.49

455.28

1.9991

70

0.555904

437.23

465.02

2.0839

0.276260

436.78

464.41

2.0261

80

0.572447

445.64

474.26

2.1105

0.284657

445.23

473.70

2.0528

90

0.588966

454.22

483.67

2.1367

0.293029

453.84

483.14

2.0792

100

0.605464

462.96

493.24

2.1627

0.301380

462.61

492.74

2.1053

110

0.621943

471.87

502.96

2.1884

0.309713

471.53

502.50

2.1311

120

0.638407

480.93

512.85

2.2139

0.318029

480.61

512.42

2.1566

130

0.654857

490.15

522.89

2.2391

0.326331

489.85

522.49

2.1819

T (oC)

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

 

P = 150 kPa (Sat. T = -17.13 oC)

P = 200 kPa (Sat. T = -10.07 oC)

Sat

0.131283

368.63

388.32

1.7388

0.099877

372.64

392.62

1.7334

-10

0.135816

373.84

394.21

1.7615

0.099915

372.70

392.68

1.7337

0

0.142013

381.19

402.49

1.7924

0.104811

380.24

401.20

1.7654

10

0.148081

388.64

410.86

1.8225

0.109552

387.82

409.73

1.7961

20

0.154053

396.23

419.33

1.8519

0.114185

395.49

418.33

1.8259

30

0.159950

403.95

427.94

1.8808

0.118737

403.29

427.04

1.8551

40

0.165787

411.82

436.68

1.9092

0.123226

411.22

435.87

1.8838

50

0.171576

419.83

445.57

1.9371

0.127663

419.29

444.83

1.9120

60

0.177323

428.01

454.60

1.9646

0.132057

427.51

453.92

1.9397

70

0.183036

436.33

463.79

1.9918

0.136415

435.88

463.16

1.9670

80

0.188719

444.82

473.12

2.0186

0.140744

444.40

472.54

1.9940

90

0.194377

453.45

482.61

2.0451

0.145046

453.06

482.07

2.0206

100

0.200014

462.25

492.25

2.0713

0.149326

461.88

491.75

2.0468

110

0.205631

471.20

502.04

2.0972

0.153588

470.86

501.57

2.0728

120

0.211233

480.30

511.98

2.1228

0.157832

479.98

511.55

2.0985

130

0.216819

489.56

522.08

2.1481

0.162062

489.26

521.67

2.1240

140

0.222394

498.97

532.33

2.1732

0.166278

498.69

531.95

2.1491

T (oC)

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

 

P = 300 kPa (Sat. T = 0.67 oC)

P = 400 kPa (Sat. T = 8.93 oC)

Sat

0.067704

378.68

399.00

1.7267

0.051207

383.24

403.72

1.7226

10

0.070931

386.06

407.34

1.7567

0.051506

384.12

404.72

1.7261

20

0.074254

393.96

416.24

1.7876

0.054214

392.32

414.01

1.7584

30

0.077478

401.93

425.18

1.8175

0.056797

400.50

423.22

1.7893

40

0.080629

410.00

434.19

1.8468

0.059293

408.73

432.45

1.8192

50

0.083723

418.19

443.31

1.8755

0.061724

417.05

441.74

1.8484

60

0.086770

426.50

452.54

1.9036

0.064105

425.47

451.11

1.8770

70

0.089779

434.95

461.89

1.9312

0.066443

434.01

460.58

1.9050

80

0.092755

443.54

471.37

1.9585

0.068748

442.67

470.17

1.9325

90

0.095705

452.27

480.99

1.9853

0.071023

451.47

479.88

1.9597

100

0.098631

461.15

490.74

2.0118

0.073275

460.41

489.72

1.9864

110

0.101537

470.17

500.63

2.0380

0.075505

469.48

499.68

2.0127

120

0.104426

479.34

510.67

2.0638

0.077717

478.69

509.78

2.0387

130

0.107299

488.66

520.85

2.0894

0.079914

488.05

520.02

2.0645

140

0.110160

498.12

531.17

2.1147

0.082097

497.55

530.39

2.0899

150

0.113009

507.74

541.64

2.1397

0.084268

507.20

540.91

2.1150

160

0.115847

517.50

552.25

2.1645

0.086429

516.99

551.56

2.1399

T (oC)

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

 

P = 500 kPa (Sat. T = 15.73 oC)

P = 600 kPa (Sat. T = 21.57 oC)

Sat

0.041123

386.91

407.47

1.7197

0.034300

389.99

410.57

1.7175

20

0.042116

390.55

411.61

1.7339

30

0.044338

398.99

421.16

1.7659

0.035984

397.37

418.96

1.7455

40

0.046456

407.40

430.63

1.7967

0.037866

406.01

428.73

1.7772

50

0.048500

415.86

440.11

1.8265

0.039659

414.63

438.43

1.8077

60

0.050486

424.40

449.64

1.8555

0.041389

423.30

448.13

1.8373

70

0.052427

433.04

459.25

1.8839

0.043070

432.04

457.88

1.8661

80

0.054332

441.78

468.95

1.9118

0.044711

440.87

467.70

1.8943

90

0.056205

450.65

478.76

1.9392

0.046319

449.82

477.61

1.9220

100

0.058054

459.65

488.68

1.9661

0.047900

458.88

487.62

1.9492

110

0.059880

468.78

498.72

1.9927

0.049459

468.06

497.74

1.9759

120

0.061688

478.04

508.88

2.0189

0.050998

477.37

507.97

2.0023

130

0.063479

487.44

519.18

2.0447

0.052520

486.82

518.33

2.0283

140

0.065257

496.98

529.60

2.0703

0.054027

496.39

528.81

2.0540

150

0.067022

506.66

540.17

2.0955

0.055522

506.11

539.42

2.0794

160

0.068776

516.48

550.86

2.1205

0.057006

515.96

550.16

2.1045

170

0.070521

526.44

561.70

2.1453

0.058480

525.95

561.04

2.1293

T (oC)

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

 

P = 800 kPa (Sat. T = 31.32 oC)

P = 1000 kPa (Sat. T = 39.38 oC)

Sat

0.025625

394.96

415.46

1.7140

0.020316

398.85

419.16

1.7113

40

0.027036

402.97

424.59

1.7436

0.020407

399.45

419.86

1.7135

50

0.028547

412.00

434.84

1.7758

0.021796

409.09

430.88

1.7482

60

0.029974

420.98

444.95

1.8067

0.023068

418.46

441.53

1.7806

70

0.031340

429.96

455.03

1.8365

0.024262

427.74

452.00

1.8116

80

0.032659

438.99

465.12

1.8654

0.025399

437.00

462.40

1.8415

90

0.033942

448.10

475.25

1.8937

0.026493

446.30

472.79

1.8705

100

0.035194

457.30

485.45

1.9214

0.027552

455.65

483.21

1.8988

110

0.036420

466.60

495.74

1.9486

0.028584

465.09

493.67

1.9264

120

0.037626

476.02

506.12

1.9754

0.029593

474.62

504.21

1.9536

130

0.038813

485.55

516.60

2.0017

0.030582

484.25

514.83

1.9803

140

0.039985

495.21

527.20

2.0277

0.031554

494.00

525.55

2.0065

150

0.041144

504.99

537.91

2.0533

0.032512

503.86

536.37

2.0324

160

0.042291

514.91

548.74

2.0786

0.033458

513.84

547.30

2.0579

170

0.043427

524.96

559.70

2.1036

0.034393

523.95

558.35

2.0831

180

0.044554

535.14

570.78

2.1283

0.035318

534.19

569.51

2.1081

T (oC)

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

 

P = 1200 kPa (Sat. T = 46.31 oC)

P = 1400 kPa (Sat. T = 52.42 oC)

Sat

0.016718

401.98

422.04

1.7087

0.014110

404.54

424.30

1.7062

50

0.017201

405.77

426.41

1.7223

60

0.018404

415.70

437.79

1.7570

0.015005

412.61

433.62

1.7345

70

0.019502

425.36

448.76

1.7895

0.016060

422.77

445.25

1.7689

80

0.020530

434.90

459.53

1.8204

0.017023

432.65

456.48

1.8012

90

0.021506

444.41

470.22

1.8502

0.017923

442.42

467.52

1.8320

100

0.022443

453.94

480.87

1.8792

0.018778

452.16

478.45

1.8617

110

0.023348

463.53

491.54

1.9074

0.019597

461.91

489.34

1.8905

120

0.024228

473.18

502.25

1.9350

0.020388

471.70

500.24

1.9186

130

0.025087

482.92

513.03

1.9621

0.021156

481.55

511.17

1.9460

140

0.025928

492.76

523.87

1.9886

0.021904

491.49

522.16

1.9730

150

0.026753

502.70

534.81

2.0148

0.022637

501.52

533.21

1.9994

160

0.027566

512.76

545.84

2.0406

0.023355

511.65

544.35

2.0254

170

0.028367

522.93

556.97

2.0660

0.024062

521.90

555.58

2.0510

180

0.029159

533.23

568.22

2.0911

0.024758

532.25

566.91

2.0763

T (oC)

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

 

P = 1600 kPa (Sat. T = 57.90 oC)

P = 2000 kPa (Sat. T = 67.48 oC)

Sat

0.012127

406.64

426.04

1.7036

0.009291

409.70

428.28

1.6976

60

0.012373

409.04

428.84

1.7120

70

0.013430

419.91

441.40

1.7491

0.009573

412.91

432.06

1.7086

80

0.014362

430.24

453.22

1.7831

0.010539

424.70

445.78

1.7481

90

0.015216

440.32

464.66

1.8150

0.011363

435.66

458.39

1.7833

100

0.016015

450.29

475.91

1.8456

0.012105

446.24

470.45

1.8160

110

0.016773

460.22

487.06

1.8751

0.012791

456.63

482.21

1.8471

120

0.017500

470.16

498.16

1.9037

0.013436

466.93

493.80

1.8770

130

0.018202

480.15

509.27

1.9316

0.014051

477.21

505.31

1.9059

140

0.018882

490.19

520.40

1.9589

0.014640

487.49

516.78

1.9340

150

0.019546

500.32

531.59

1.9856

0.015210

497.82

528.24

1.9614

160

0.020194

510.53

542.84

2.0119

0.015764

508.21

539.74

1.9883

170

0.020831

520.84

554.17

2.0378

0.016303

518.68

551.28

2.0146

180

0.021456

531.26

565.59

2.0632

0.016830

529.23

562.89

2.0405

T (oC)

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

v

m3/kg

u

kJ/kg

h

kJ/kg

s

kJ/kgK

 

P = 3000 kPa (Sat. T = 86.20oC)

P = 4000 kPa (Sat. T = 100.34 oC)

Sat

0.005281

411.50

427.34

1.6748

0.002563

395.13

405.38

1.6046

90

0.005752

418.53

435.78

1.6982

100

0.006641

433.18

453.10

1.7453

110

0.007327

445.79

467.77

1.7841

0.004273

429.17

446.26

1.7131

120

0.007917

457.57

481.32

1.8190

0.004993

445.13

465.10

1.7616

130

0.008447

468.92

494.26

1.8515

0.005549

458.71

480.90

1.8013

140

0.008937

480.05

506.86

1.8824

0.006024

471.28

495.38

1.8368

150

0.009396

491.05

519.24

1.9120

0.006450

483.32

509.12

1.8697

160

0.009832

502.00

531.50

1.9406

0.006842

495.07

522.43

1.9008

170

0.010250

512.93

543.68

1.9684

0.007208

506.64

535.47

1.9305

180

0.010652

523.89

555.84

1.9956

0.007554

518.11

548.33

1.9592

Reference States, IIR Convention

  • Enthalpy H = 200 kJ/kg at 0°C for saturated liquid.
  • Entropy S = 1 kJ/kg-K at 0°C for saturated liquid.

Source: Eric W. Lemmon, Mark O. McLinden and Daniel G. Friend, “Thermophysical Properties of Fluid Systems” in NIST Chemistry WebBook, NIST Standard Reference Database Number 69, Eds. P.J. Linstrom and W.G. Mallard, National Institute of Standards and Technology, Gaithersburg MD, 20899, https://doi.org/10.18434/T4D303, (retrieved May 2021).

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