Quick Answer
Calculate Boiler Efficiency (HHV/LHV) Calculator
Calculator
Result Interpretation
Boiler Efficiency (HHV/LHV) Calculator computes Boiler efficiency in dimensionless using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Fuel mass flow rate = 0.25
- Calorific value of fuel = 30000
- Steam mass flow rate = 10
- Enthalpy of outlet steam = 2776.2
- Enthalpy of inlet feedwater = 419.1
Expected Result:
- Boiler efficiency = 3.1428
Engineering Interpretation:
Under the given input conditions, the calculated result is: Boiler efficiency = 3.1428 dimensionless.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
boiler efficiency = (steam mass flow rate * (enthalpy of outlet steam - enthalpy of inlet feedwater)) / (fuel mass flow rate * calorific value of fuel)Formula family: formula_boiler_boiler_efficiency_hhv_lhv_calculator_calculator
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| m_steam | Steam mass flow rate | INPUT | Steam mass flow rate |
| h_steam_out | Enthalpy of outlet steam | INPUT | Enthalpy of outlet steam |
| h_feedwater_in | Enthalpy of inlet feedwater | INPUT | Enthalpy of inlet feedwater |
| m_fuel | Fuel mass flow rate | INPUT | Fuel mass flow rate |
| CV_fuel | Calorific value of fuel | INPUT | Calorific value of fuel |
| boiler_efficiency | Boiler efficiency | OUTPUT | Boiler efficiency |
Calculation Steps
- Enter the steam mass flow rate in kg/s.
- Enter the enthalpy of outlet steam in kJ/kg.
- Enter the enthalpy of inlet feedwater in kJ/kg.
- Enter the fuel mass flow rate in kg/s.
- Enter the calorific value of fuel in kJ/kg.
- Step 1: Compute boiler efficiency.
- Read the boiler efficiency (dimensionless) from the results.
Engineering Summary
Calculate Boiler Efficiency (HHV/LHV) Calculator
Frequently Asked Questions
What does this calculator calculate?
The Boiler Efficiency (HHV/LHV) Calculator estimates Boiler efficiency based on the input parameters you provide
Why is steam mass flow rate important in this calculation?
steam mass flow rate is directly proportional to boiler efficiency. When you enter steam mass flow rate in kg/s, the calculator uses it in the engineering formula to compute the output
How should I interpret the result boiler efficiency?
The calculator outputs boiler efficiency in dimensionless. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Steam mass flow rate (kg/s), Enthalpy of outlet steam (kJ/kg), Enthalpy of inlet feedwater (kJ/kg), Fuel mass flow rate (kg/s), Calorific value of fuel (kJ/kg). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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