constructive total loss |

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constructive total loss |

## Related Terms |

## CTLconstructive total loss |

## CONTINUOUS BLOWDOWNThe uninterrupted removal of concentrated boiler water from a boiler to control total solids concentration in the remaining water. |

## TOTAL AIRThe total quantity of air supplied to the fuel and products of combustion. Percent total air is the ratio of total air to theoretical air expressed as per cent. |

## FAN PERFORMANCE CURVESThe graphical presentation of total pressure, static pressure, power input, and mechanical and static efficiency as ordinates and the range of volumes as absciassas, all at constant speed and air density. |

## STACK LOSSThe fraction of total heat which exits with the flue gas through the stack. The quantity is customarily expressed as a percent of the total heat input. The stack loss is directly proportional to the stack exit temperature; the higher the temperature, the greater the stack loss. |

## THERMO ACOUSTICAL EFFICIENCYEqual to the sound power level/heat release. A value used to characterize the amount of combustion noise emitted from a flame. Defined as the ratio of the acoustical power emitted from the flame to the total heat release of the flame. Approximately equal to 1 X 10-6 for premixed and turbulent flames and equal to 1 X 10-9 for diffusion and laminar flames. |

## FAN PERFORMANCEA measure of fan operation in terms of volume, total pressures, static pressures, speed, power input, and mechanical and static efficiency, at a stated air density. |

## USE FACTORThe ratio of hours in operation to the total hours in that period. |

## MOLE FRACTIONThe number of moles of any component in a mixture divided by the total number of moles in the mixture. |

## BETA RATIOFor a single orifice the beta ratio is the ratio of the orifice bore diameter to that of the upstream pipe diameter. However, since in burner designs typically there is more than one orifice at a riser pipe exit, the beta ratio is equal to the square root of the ratio between total area of the fuel ports to that of the upstream pipe area. |

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