Module 1: Fuels characterization and energy balance
  Lecture 3: Exercises of analysis and calorific value
 


(3) The proximate analysis of coal is: Moisture 2.4%, Volatile Matter 29.4%, Fixed Carbon 58%, Ash 9.7% and Sulphur 0.5%. Its gross calorific value is 7650 Kcal/Kg. Calculate proximate analysis and calorific value on
   (A) Moisture free basis
   (B) Dry ash free basis

Solution

Moist

Moist free basis
Dry ash free basis
M
2.4
-
-
VM
29.4
30.12
33.45
FC
58
59.42
65.98
A
9.7
9.93
-
S
0.5
0.51
0.57
Calorific value (KJ/Kg)
32023
32810
36431

Note: Change in basis increases CV. On actual heating heat taken by moisture and ash will not be available.