Info

(kJ/kg)

The equation used by manufacturers to calculate the amount of thermal energy that can be recovered from the combustion engine exhaust gas is expressed as:

The equation used by manufacturers to calculate the amount of thermal energy that can be recovered from the combustion engine exhaust gas is expressed as:

Where:

Q = Total heat available, Btu/h (kJ/h) m = Exhaust gas mass flow rate through system, lbm/h

Energy Loss

Energy Loss

Fig. 8-1 Representative Heat Recovery Application Options for Gas Turbine.

Specific heat at constant pressure of the exhaust gas, Btu/lbm per °F (kJ/kg per °C); N2 constitutes the major part — around 75% of the total exhaust gases volume and the specific heat for N2 ranges from 0.2495 to 0.2942 Btu/lbm per °F (1.045 to 1.232 kJ/kg per °C) for the corresponding temperature range 200 to 2,000°F (93 to 1,093°C)

Exhaust gas inlet temperature, in °F (°C) Exhaust gas exit temperature, in °F (°C)

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