Calculating heat loss due to unburnt in fly ash to determine the efficiency of the boiler.
The percentage heat loss due to the unburnt in the fly ash is defined as the ratio of total ash collected divided by the kg of fuel burnt multiplied by the gross calorific value of fly ash the whole divided by gross calorific value of the fuel multiplied by 100. This loss is one of the factor that affects the efficiency of the boiler.
Formula:
L6 = {[(Total Ash Collected / kg of Fuel Burnt) x GCV of Fly Ash] / GCV of Fuel} x 100
Let us consider an example on how to calculate the heat loss due to unburnt in fly ash with the given values.
Step 1: Given that,
Total ash collected = 150
Kg of fuel burnt = 1000
GCV of fly ash = 3000
GCV 0f fuel = 5000
Step 2:
Applying the values in the formula,
L6 = {[(150 / 1000) x 3000] / 5000} x 100
L6 = 9%
Result: % Heat Loss Due to Unburnt in Fly Ash = 9%