Cogeneration Turbine Heat rate Calculator

 

Cogen turbine heat rate is the amount of heat energy required by a cogeneration system to generate one unit of electrical energy. It is generally expressed in kcal/kWh or kJ/kWh. A lower heat rate indicates better energy efficiency, meaning less heat energy is required to generate each unit of electricity.

What are the Inputs required for the Calculation of Cogen Turbine Heat rate calculation?

• Turbine inlet steam flow in TPH
• Turbine inlet steam pressure and temperature
• Bleed steam flow
• Bleed steam pressure and temperature
• Extraction steam flow
• Extraction steam pressure and Temperature
• Exhaust steam flow
• Exhaust steam pressure

Co-gen-THR =((Turbine inlet steam flow X its Enthalpy)-(Process steam flow X Enthalpy Exhaust steam flow X Enthalpy)) / Power generation

Steam Turbine Co-generation Heat Rate Calculator

Calculate Turbine Heat Rate using Inlet, Extraction / Bleed and Exhaust Steam Conditions

1. Turbine Inlet Steam Conditions

Inlet Steam Flow (TPH)

Inlet Pressure (kg/cm²)

Inlet Temperature (°C)

2. Process Steam / Extraction / Bleed Conditions

3. Turbine Exhaust Steam Conditions

Exhaust Steam Flow (TPH)

Exhaust Pressure (kg/cm²)

Exhaust Temperature (°C) - Reference Only

4. Turbine Power Generation

Power Generation (MW)

Calculation Results

Inlet Steam Enthalpy

0 kcal/kg

Inlet Heat Energy

0 kcal/hr

Total Extraction / Process Heat

0 kcal/hr

Exhaust Liquid Enthalpy (hf)

0 kcal/kg

Exhaust Heat

0 kcal/hr

Net Heat for Power Generation

0 kcal/hr

Co-generation Heat Rate

0 kcal/kWh

Co-generation Heat Rate

0 kJ/kWh

Specific Heat Input

0 kJ/kg inlet steam

Formula Used:
Co-gen THR = [(Turbine Inlet Steam Flow × Inlet Enthalpy) − Σ(Process / Extraction Steam Flow × Extraction Enthalpy) − (Turbine Exhaust Flow × Liquid Enthalpy at Exhaust Pressure)] ÷ Power Generation

Important: Exhaust enthalpy is considered as saturated liquid enthalpy (hf) based on exhaust pressure. Exhaust temperature is not used for exhaust enthalpy calculation.

Note: Steam enthalpy is estimated internally from pressure and temperature using an engineering approximation. This is suitable for indicative online calculations. For guaranteed turbine heat-rate calculations, validated steam tables or IAPWS-IF97 properties should be used.

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