“In this boiler efficiency calculator, we will show you how to calculate boiler efficiency in just a few simple steps.
We will also help you understand what boiler efficiency really means, the formula behind it, and how energy input and output affect it.
What is boiler efficiency?
How do you calculate energy output and energy input?
How can this formula be applied in real-world industries? Find all the answers right here!”
Boiler Efficiency Calculator
Boiler Efficiency Formula Explained
The boiler efficiency formula calculates how effectively a boiler converts fuel energy into steam energy.
Step 1: Calculate Energy Output
Energy Output = Q × (h – hw)
Step 2: Calculate Energy Input
Energy Input = q × GCV
Step 3: Calculate Boiler Efficiency
Efficiency (η) = (Energy Output / Energy Input) × 100
In Formula Form:
η = [ (Q × (h – hw)) / (q × GCV) ] × 100
- η = Boiler Efficiency (%)
- Q = Quantity of Steam Generated per hour (kg/hr)
- h = Enthalpy of Steam (kCal/kg)
- hw = Enthalpy of Feed Water (kCal/kg)
- q = Quantity of Fuel Used per hour (kg/hr)
- GCV = Gross Calorific Value of Fuel (kCal/kg)
Real-World Applications
Power Plants
Calculating boiler efficiency ensures optimal fuel use in thermal power generation.
Industrial Boilers
Used in factories to monitor energy conversion efficiency and reduce fuel wastage.
Marine Boilers
Ships use boiler efficiency calculations to optimize fuel usage and save operational costs.
Solved Example: Step-by-Step Guide
Problem: A boiler generates 5000 kg/hr of steam at an enthalpy of 2800 kCal/kg. The feed water has an enthalpy of 200 kCal/kg. The fuel used is 600 kg/hr with a GCV of 12000 kCal/kg. Calculate the boiler efficiency.
Step 1: Identify the known values
- Q = 5000 kg/hr
- h = 2800 kCal/kg
- hw = 200 kCal/kg
- q = 600 kg/hr
- GCV = 12000 kCal/kg
Step 2: Apply the formula
η = [ (Q × (h – hw)) / (q × GCV) ] × 100
Step 3: Substitute the values
η = [ (5000 × (2800 – 200)) / (600 × 12000) ] × 100
Step 4: Perform calculations
η = [ (5000 × 2600) / (7200000) ] × 100
η = (13000000 / 7200000) × 100
Step 5: Calculate efficiency
η = 1.8056 × 100
η ≈ 180.56 % (Note: If the value seems unrealistic, check the inputs. This is a guide on calculation steps.)
Boiler Efficiency Reference Table
| Parameter | Typical Values | Unit | Notes |
|---|---|---|---|
| Quantity of Steam (Q) | 1000 – 10000 | kg/hr | Amount of steam generated per hour |
| Enthalpy of Steam (h) | 2000 – 2800 | kCal/kg | Energy content of steam |
| Enthalpy of Feed Water (hw) | 100 – 300 | kCal/kg | Energy content of water before heating |
| Fuel Quantity (q) | 500 – 2000 | kg/hr | Amount of fuel consumed per hour |
| Gross Calorific Value (GCV) | 10000 – 15000 | kCal/kg | Energy per kg of fuel |
| Boiler Efficiency (η) | 70 – 90 | % | Percentage of fuel energy converted to steam |
FAQs
What is boiler efficiency?
In this boiler efficiency calculator, we will show you how to find boiler efficiency in a matter of seconds. Boiler efficiency tells you how effectively a boiler converts fuel energy into steam energy.
Why is boiler efficiency important?
It helps industries save fuel, reduce costs, and improve energy use. A more efficient boiler means less wasted energy.
Can this calculator be used for all types of boilers?
Yes! You can use it for industrial, marine, and power plant boilers, but make sure you have the correct steam and fuel values.
How can I improve boiler efficiency?
Improving boiler efficiency can be done by reducing heat losses, maintaining proper water levels, using quality fuel, and regular maintenance.