Power Engineering

Combined Cycle Heat Rate Decomposition Analyzer Calculator

Combined Cycle Heat Rate Decomposition Analyzer engineering calculator.

Quick Answer

Calculate Combined Cycle Heat Rate Decomposition Analyzer

Calculator

Combined Cycle Heat Rate Decomposition (kJ⁄kWh)
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Result Interpretation

Combined Cycle Heat Rate Decomposition Analyzer Calculator computes Combined Cycle Heat Rate Decomposition in kJ/kWh using the defined engineering formula and the input values provided.

Worked Example

Verified calculation

Given:

  • Gas Turbine Net Electrical Output = 275000
  • Steam Turbine Net Electrical Output = 135000
  • Lower Heating Value of Natural Gas = 45700
  • Fuel Mass Flow Rate = 12.8
  • HRSG Exhaust Gas Heat Loss = 18200
  • Condenser Heat Rejection Loss = 215000

Expected Result:

  • Combined Cycle Heat Rate Decomposition = 1.995512195122

Engineering Interpretation:

Under the given input conditions, the calculated result is: Combined Cycle Heat Rate Decomposition = 1.995512195122 kJ/kWh.

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

combined cycle heat rate decomposition = (lower heating value of natural gas * fuel mass flow rate) / (gas turbine net electrical output + steam turbine net electrical output) + (hrsg exhaust gas heat loss / (gas turbine net electrical output + steam turbine net electrical output)) + (condenser heat rejection loss / (gas turbine net electrical output + steam turbine net electrical output))

Formula family: formula_power_combined_cycle_heat_rate_decomposition_analyzer

Variables

SymbolLabelRoleDescription
LHV_ng Lower Heating Value of Natural Gas INPUT Lower Heating Value of Natural Gas
m_fuel Fuel Mass Flow Rate INPUT Fuel Mass Flow Rate
W_gt Gas Turbine Net Electrical Output INPUT Gas Turbine Net Electrical Output
W_st Steam Turbine Net Electrical Output INPUT Steam Turbine Net Electrical Output
Q_loss_hrsg HRSG Exhaust Gas Heat Loss INPUT HRSG Exhaust Gas Heat Loss
Q_loss_condenser Condenser Heat Rejection Loss INPUT Condenser Heat Rejection Loss
combined_cycle_heat_rate_decomposition Combined Cycle Heat Rate Decomposition OUTPUT Combined Cycle Heat Rate Decomposition

Calculation Steps

  1. Enter the lower heating value of natural gas in kJ/kg.
  2. Enter the fuel mass flow rate in kg/s.
  3. Enter the gas turbine net electrical output in kW.
  4. Enter the steam turbine net electrical output in kW.
  5. Enter the hrsg exhaust gas heat loss in kW.
  6. Enter the condenser heat rejection loss in kW.
  7. Step 1: Compute combined cycle heat rate decomposition.
  8. Read the combined cycle heat rate decomposition (kJ/kWh) from the results.

Engineering Summary

Calculate Combined Cycle Heat Rate Decomposition Analyzer

Frequently Asked Questions

What does this calculator calculate?

The Combined Cycle Heat Rate Decomposition Analyzer Calculator estimates Combined Cycle Heat Rate Decomposition based on the input parameters you provide

Why is lower heating value of natural gas important in this calculation?

lower heating value of natural gas is directly proportional to combined cycle heat rate decomposition. When you enter lower heating value of natural gas in kJ/kg, the calculator uses it in the engineering formula to compute the output

How should I interpret the result combined cycle heat rate decomposition?

The calculator outputs combined cycle heat rate decomposition in kJ/kWh. 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: Lower Heating Value of Natural Gas (kJ/kg), Fuel Mass Flow Rate (kg/s), Gas Turbine Net Electrical Output (kW), Steam Turbine Net Electrical Output (kW), HRSG Exhaust Gas Heat Loss (kW), Condenser Heat Rejection Loss (kW). 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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