Air-Cooled Heat Exchangers and Cooling Towers: Thermal-Flow Performance Evaluation and Design, Volume II
By Detlev G. Kröger

Appendix C: Conversion Factors

Acceleration

  • 1 cm/s 2 = 1.000 10 ?2 m/s 2

  • 1 m/h 2= 7.716 10 ?8 m/s 2

  • 1 ft/s 2= 0.3048 m/s 2

  • 1 ft/h 2 = 2.352 10 ?8 m/s 2

Area

  • 1 ha = 10 4 m 2

  • 1 acre = 4.047 10 3 m 2

  • 1 cm 2= 1.000 10 ?4 m 2

  • 1 ft 2= 9.290 10 ?2 m 2

  • 1 in 2= 6.452 10 ?4 m 2

  • 1 yard 2 = 0.8361 m 2

  • 1 square mile = 2.59 10 6 m 2

Density

  • 1 g/cm 3= 1000 kg/m 3

  • 1 1b/ft 3 = 16.02 kg/m 3

  • 1 kg/ft 3 = 35.31 kg/m 3

Energy, work, heat

  • 1 cal = 4.187 J

  • 1 kcal = 4187 J

  • 1 Btu = 1055 J

  • 1 erg = 1.000 10 ?7 J

  • 1 kWh = 3.600 10 6 J

  • 1 ft pdl = 4.214 10 ?2 J

  • 1 ft lbf = 1.356 J

  • 1 Chu = 1899 J

  • 1 therm = 1.055 10 8 J

Force

  • 1 dyne = 1.000 10 ?5N

  • 1 kgf = 9.807 N

  • 1 pdl = 0.1383 N

  • 1 lbf = 4.448 N

Heat flux

  • 1 cal/s cm 2= 4.187 10 4 W/m 2

  • 1 kcal/h m 2 = 1.163 W/m

Copyright PennWell Corporation 2004 under license agreement with Books24x7
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