ENGINEERING MANUAL OF AUTOMATIC CONTROL
GENERAL ENGINEERING DATA
471
General
Engineering Data
Contents
Introduction ............................................................................................................ 472
Weather Data ............................................................................................................ 472
Degree Days ....................................................................................... 472
Heating Data ....................................................................................... 473
Cooling Data........................................................................................ 474
Conversion Formulas And Tables ............................................................................................................ 475
General................................................................................................ 475
Metric Prefixes..................................................................................... 475
Pressure .............................................................................................. 475
Weight/Mass........................................................................................ 476
Area ..................................................................................................... 476
Length ................................................................................................. 476
Volume ................................................................................................ 477
Mass Per Unit Volume Of Water ......................................................... 477
Specific Heat ....................................................................................... 477
Temperature ........................................................................................ 477
Heat Transfer....................................................................................... 479
Flow ..................................................................................................... 479
Velocity ................................................................................................ 479
Power .................................................................................................. 480
Work/Energy........................................................................................ 480
Enthalpy .............................................................................................. 481
Force ................................................................................................... 481
Torque ................................................................................................. 481
Density ................................................................................................ 481
Electrical Data ............................................................................................................ 482
Electrical Distribution Systems ............................................................ 482
General ........................................................................................... 482
Single-Phase System...................................................................... 482
Three-Phase Three-Wire Wye System ........................................... 483
Three-Phase Four-Wire Wye System ............................................. 483
Three-Phase Delta System ............................................................. 483
Electrical Conductors .......................................................................... 484
Conduit Size And Fill ........................................................................... 485
Electric Motors..................................................................................... 485
Voltage Conversion ............................................................................. 487
Properties Of Saturated Steam Data ............................................................................................................ 488
Airflow Data ............................................................................................................ 489
Fan Ratings ......................................................................................... 489
Velocity Pressure................................................................................. 490
Moisture Content Of Air Data ............................................................................................................ 491
Moisture In Compressed Air ................................................................ 491
Relative Humidity ................................................................................ 493