FUELS AND COMBUSTION

Question 1

API AND BAUME

Answer 1

API = (141.5 / SG@15.6°C) - 131.5
BAUME = (140 / SG@15.6°C) - 130

Question 2

SG at given temperature

Answer 2

SGt = SG @15.6°C (CORRECTION FACTOR)

Question 3

CORRECTION FACTOR

Answer 3

CF (SI UNIT) = 1 - 0.72×10‐³(t - 15.6°C)
CF (ENG UNIT) = 1 - 0.4×10‐³(t - 60°F)

Question 4

HHV COAL

Answer 4

33820 C + 144212 (H - O/8) + 9304 S , in kj/kg

Question 5

HHV OIL

Answer 5

41130 + 139.6 (API) , in kj/kg

Question 6

HHV Bureau of Standards

Answer 6

51716 - 8793.8(SG)², in kj/kg

Question 7

HHV CnHm

Answer 7

13500 C + 60890 H , in BTU/lb

C= 12n/(12n + m)
H = m/(12n + m)

Question 8

LHV

Answer 8

HHV - 9 H sub 2(2442), kj/kg

H2 = 26 - 15(SG) , %

Question 9

AIR/FUEL COAL

Answer 9

11.5 C + 34.5 (H - O/8) + 4.3 S

Question 10

AIR/FUEL CnHm (Short)

Answer 10

X[32 + 3.76(28)]/(12n + m)

X = n + (m/4)

Question 11

AIR/FUEL CnHm (Long)

Answer 11

CnHm + aO2 + 3.76aN2 = bCO2 + cH2O + 3.76N2

[(aO2) + 3.76(aN2)]/(12n + m)

Question 12

HHV kj/kg

Answer 12

3117

Question 13

HHV in BTU/lb

Answer 13

1340

Question 14

HHV in kcal/kg

Answer 14

745

Question 15

GAS/FUEL

Answer 15

GAS/FUEL = 1 + AIR/FUEL

Question 16

ACTUAL A/F

Answer 16

[A/F]T(1 + e)

Question 17

WEIGHT DRY FLUE GAS

Answer 17

Actual A/F + 1