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An exhaust gas temperature gauge (EGT gauge or EGT sensor) is a meter used to monitor the exhaust gas temperature of an internal combustion engine in conjunction with a thermocouple-type pyrometer. EGT gauges are found in certain cars and aeroplanes. By monitoring EGT, the driver or pilot can get an idea of the vehicle's air-fuel ratio (AFR).
Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline (petrol), diesel fuel, fuel oil, biodiesel blends, [1] or coal. According to the type of engine, it is discharged into the atmosphere through an exhaust pipe , flue gas stack , or propelling nozzle .
The lower heating value of natural gas is normally about 90% of its higher heating value. This table is in Standard cubic metres (1 atm, 15 °C), to convert to values per Normal cubic metre (1 atm, 0 °C), multiply above table by 1.0549.
Exhaust gas temperature (EGT) gauge - Indicates the temperature of the exhaust gas just after combustion. If only one reading is provided, it measures the typically hottest cylinder's exhaust. Used to set the air-fuel mixture (leaning) correctly. Cylinder head temperature (CHT) gauge - Indicates the temperature of at least one of the cylinder ...
"The efficiency of a gas turbine can be increased by reducing the proportion of heat that goes to waste, that is, by reducing the temperature of the exhaust." [ 13 ] Less waste is involved in producing most of the thrust (~ 90%) of a modern civil bypass engine since the bypass air is barely warm, only 60 °F above ambient at take-off.
Wet exhaust flue gas: Amount of wet exhaust gas, m 3 /GJ of fuel 294.8 303.1 323.1 Amount of wet exhaust gas, scf/10 6 Btu of fuel 11,600 11,930 12,714 CO 2 in wet exhaust gas, volume % 8.8 12.4 13.7 O 2 in wet exhaust gas, volume % 2.0 2.6 3.4 Molecular weight of wet exhaust gas 27.7 29.0 29.5 Dry exhaust flue gas: Amount of dry exhaust gas, m ...
Adding exhaust gas therefore reduces pressure and temperature during the isentropic compression in the cylinder, thereby lowering the adiabatic flame temperature. In a typical automotive spark-ignited (SI) engine, 5% to 15% of the exhaust gas is routed back to the intake as EGR. The maximum quantity is limited by the need of the mixture to ...
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