economizer

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economizer

[ē′kän·ə‚miz·ər]
(engineering)
A reservoir in a continuous-flow oxygen system in which oxygen exhaled by the user is collected for recirculation in the system.
(mechanical engineering)
A forced-flow, once-through, convection-heat-transfer tube bank in which feedwater is raised in temperature on its way to the evaporating section of a steam boiler, thus lowering flue gas temperature, improving boiler efficiency, and saving fuel.

Economizer

 

a component of a boiler unit. An economizer is a heat exchanger in which feed water is heated by flue gases before the water is supplied to the boiler. For a pressure of up to 22 kilograms-force per cm2 (2.2 megapascals) and a feed-water temperature below the dew point of the flue gases or for water that has not been deaerated, an economizer consisting of plain cast-iron tubes or of finned cast-iron tubes is used. For higher temperatures and pressures, an economizer consisting of steel tubes is used; most economizers of this type consist of plain steel tubes. An economizer increases the efficiency of a boiler unit.

economizer

economizer
Economizer/Re-breather.
economizerclick for a larger image
i. A reservoir in a continuous-flow oxygen system in which exhaled oxygen is collected for recirculation in the system. This way the consumption of oxygen is economized.
ii. The system of metering additional fuel in a carburetor or fuel injection system when the throttle is wide open. This additional fuel helps remove some of the heat when the engine is producing maximum power. The system provides an economical fuel-air mixture at all settings except at full power. Also called a power-enrichment system or a fuel economizer system.
References in periodicals archive ?
The significant difference in indoor HX fin density is attributed to the larger amount of vapor injection required in the economizer cycle that results in larger refrigerant mass flow rate through the condenser.
The economizer cycle COP shows some dependence on the economizer effectiveness.
The lowest bin in this model is 30% of building load, because the cooling load associated with lesser loadings occurs only during that time of the year when an airside economizer cycle is available.
In facilities that employ a 100% air-side economizer cycle in mild weather, chillers may be turned off altogether during much of the IPLV's 25% bracket.
Each of the mechanical systems was tested over a range of six conditions using all possible economizer cycles (for VAVDD and SZ).