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Economizer in Boiler: How It Helps Reduce Fuel Consumption

By Jasmin Shakespeare Subscribe to RSS | February 6th 2012 | Views:
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The universe is a vast space that comprises of exclusive physical systems. Also called thermodynamic system, a physical system enables exchanges of work, heat, or matter across it to produce, maintain, or reduce energy. The space engulfing the system, called surroundings or environment, may also alter the exchanges of elements in the system. Any machine or equipment is a good example of a thermodynamic system. Exchanges of elements occur to produce a desired outcome.

The boiler is a machine that best utilizes the concepts of thermodynamics. Its main role is to boil water and use it to distribute heat all over the system. It needs combustion or any heat source adequate to give the necessary heat to meet the system's demand. The machine itself or the elements in it do not directly consist of the system but the properties of those elements that make the exchanges possible. For example, the differences in water temperature when going through tubes affect the efficiency of a boiler.

The total energy being dispersed and shared all around the system is called enthalpy. Because of the environment, not all the enthalpy in a system can be utilized. A notable part of it is wasted. To improve the efficiency of a system, such as the boiler, enthalpy must be conserved. In a boiler, performance is measured by the volume of water heated with respect to the quantity of fuel at a specified timeframe. If the heat formed through combustion boils the water filled in the boiler longer than the expected time, then the system is weak.

As a result, the only way to improve the functionality in a boiler is to speed up heating the same volume of water using the equal amount of fuel. At first, it looks unattainable since an increase in heat is expected without altering the properties of any element present in the system. Unless an additional element is utilized, there is no chance of changing any rate. This is the reason why boiler designs today already consist of a heat reclaimer or economizer.

An economizer in boiler is not necessarily a foreign element that comes from the environment of a boiler system. It is an additional component that works to preheat water before being delivered in the boiler. That way, the water is partly or already substantially heated before being actually heated in the boiler, thereby reducing fuel consumption.

A Boiler economizer does not utilize heat from the environment. It pulls in the wasted steam and uses its enthalpy to preheat the water. Such a device reduces not only the fuel consumption, but also the waste production.

Jasmin Shakespeare - About Author:
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