Air-Cooled Heat Exchangers and Cooling Towers: Thermal-Flow Performance Evaluation and Design, Volume II

Appendix A: Properties of Fluids

A.1 The Thermophysical Properties of Dry Air from 220K to 380K at Standard Atmospheric Pressure (101325 N/m2)

Density


Specific heat from General Electric Heat Transfer and Fluid Flow Data Book


Dynamic viscosity from General Electric Heat Transfer and Fluid Flow Data Book


Thermal conductivity


Table A.1: The Thermophysical Properties of Dry Air at Standard Atmospheric Pressure

T K

? a kg/m 3

c pa J/kgK

? a 10 5 kg/ms

k a W/mK

? a 10 5 m 2/s

Pr a

220

1.60432

1007.20

1.46304

0.0197973

1.22518

0.744330

225

1.56866

1006.99

1.48797

0.0202127

1.27957

0.741309

230

1.53456

1006.81

1.51278

0.0206262

1.33500

0.738428

235

1.50191

1006.66

1.53746

0.0210378

1.39145

0.735680

240

1.47062

1006.53

1.56201

0.0214475

1.44892

0.733056

245

1.44061

1006.43

1.58643

0.0218553

1.50738

0.730550

250

1.41180

1006.35

1.61073

0.0222613

1.56684

0.728156

255

1.38411

1006.30

1.63490

0.0226655

1.62727

0.725867

260

1.35750

1006.28

1.65894

0.0230678

1.68867

0.723678

265

1.33188

1006.28

1.68286

0.0234683

1.75103

0.721585

270

1.30722

1006.30

1.70666

0.0238669

1.81433

0.719581

275

1.28345

1006.35

1.73033

0.0242638

1.87857

0.717663

280

1.26053

1006.42

1.75388

0.0246589

1.94373

0.715828

285

1.23842

1006.52

1.77731

0.0250521

2.00980

0.714070

290

1.21707

1006.64

1.80061

0.0254436

2.07677

0.712387

295

1.19644

1006.78

1.82380

0.0258334

2.14463

0.710776

300

1.17650

1006.95

1.84686

0.0262213

2.21336

0.709233

305

1.15721

1007.14

1.86980

0.0266075

2.28297

0.707755

310

1.13854

1007.35

1.89263

0.0269920

2.35342

0.706340

315

1.12047

1007.59

1.91533

0.0273747

2.42472

0.704985

320

1.10297

1007.85

1.93792

0.0277558

2.49685

0.703688

325

1.08600

1008.13

1.96039

0.0281351

2.56980

0.702446

330

1.06954

1008.43

1.98274

0.0285127

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