Fuels

Question 1

°API =

Answer 1

°API = (141.5/SG@15.6°C) – 131.5

Question 2

Specific gravity at fuel temperature t, applying correction factor

Answer 2

SGt = SG15.6°C(1-0.0007(t-15.6))

Question 3

ASME formula for heating value of petroleum products

Answer 3

Qh = 41,130 + 139.6(°API) kJ/kg

Question 4

Theoretical (stoichiometric) balance of hydrocarbon fuel

Answer 4

CnHm + x O2 + x(3.76) N2 → y CO2 + z H2O + x(3.76) N2

Question 5

Formula for moles of O2 in air during combustion , x

Answer 5

x = (4n + m) / 4

Question 6

Formula for moles of CO2 as product of combustion , y

Answer 6

y = n

Question 7

Formula for moles of H2O as product of combustion , z

Answer 7

z = m / 2