Page 325 - Introduction to Petroleum Engineering

UNIT CONVERSION FACTORS 315
1 pound‐force per square inch = 1 psi = 6894.8 Pa
5
1 atmosphere = 1 atm = 1.01325 × 10 Pa
1 atmosphere = 1 atm = 14.7 psi
1 bar = 14.5 psi = 0.1 MPa
1 MPa = 145 psi

ENERGY

6
1 megajoule = 1 MJ = 1.0 × 10 J
1 gigajoule = 1 GJ = 1.0 × 10 J
9
1 exajoule = 1 EJ = 1.0 × 10 J
18
−19
1 eV = 1.6022 × 10 J
6
1 MeV = 10 eV = 1.6022 × 10 J
−13
−7
1 erg = 10 J
1 BTU = 1055 J
1 ft⋅lbf = 0.7376 J
1 calorie (thermochemical) = 1 cal = 4.184 J
3
1 kilocalorie = 1 kcal = 1000 calories = 4.184 × 10 J
3
1 Calorie = 1000 calories = 4.184 × 10 J
1 kilowatt‐hour = 1 kW⋅h = 1 kW⋅1 hr = 3.6 × 10 J
6
15
1 quad = 1 quadrillion BTU = 1.0 × 10 BTU = 1.055 × 10 J
18
12
1 quad = 2.93 × 10 kW⋅h = 1.055 × 10 MJ
11
1 quad = 1.055 exajoule = 1.055 EJ
1 barrel of oil equivalent = 1 BOE = 5.8 × 10 BTU = 6.12 × 10 J
6
9
8
6
1 quad = 1.72 × 10 BOE = 172 × 10 BOE
ENERGY dENSITY
1 BTU/lbm = 2326 J/kg
1 BTU/SCF = 3.73 × 10 J/m 3
4
pOWER
1 watt = 1 W = 1 J/s
6
6
1 megawatt = 10 W = 10 J/s
1 kilowatt‐hour per year = 1 kW⋅h/yr = 0.114 W = 0.114 J/s
1 horsepower = 1 hp = 745.7 W
1 hp = 33 000 ft·lbf/min

VISCOSITY

1 centipoise = 1 cp = 0.001 Pa·s
−3
1 mPa·s = 0.001 Pa·s = 1 cp = 10 Pa·s
1 poise = 100 cp = 0.1 Pa·s