South Africa coal fired boiler efficiency

A few days ago, a client from South Africa asked us how to calculate the efficiency of coal fired boilers. We know there are two methods to calculate a boiler efficiency: direct method and indirect method, of which the direct method is much easier than the indirect one. Here we use the easy way to calculate a 8 ton coal fired boiler efficiency.

Before we start the calculating, we should to know the parameters for the calculation of boiler efficiency by direct method are :

Quantity of steam generated per hour (Q) in kg/hr.
Quantity of fuel used per hour (q) in kg/hr.
The working pressure (in kg/cm2(g)) and superheat temperature (oC), if any
The temperature of feed water (oC)
Type of fuel and gross calorific value of the fuel (GCV) in kCal/kg of fuel

where, hg - Enthalpy of saturated steam in kCal/kg of steam
hf - Enthalpy of feed water in kCal/kg of water

After we grasp the method, we can find out the efficiency of the boiler by direct method with the data. So, if you want to know the specific value of coal fired boiler efficiency, please tell us the details, our engineers will calculate the efficiency for you.