UEi EagleX Especificações descarregar pdf (Página 12)

N T RODUC T ION

U E i combustion analyzers provide real time data that provides information on the condition of the combus-

tion process of your equipment. This information is needed for proper setup and maintenance to verify proper opera-

tion. Benefits of combustion analysis are to increase efficiency thus reducing fuel costs, verification of proper combus-

tion to reduce future problems, and to check for safe operation. A combustion process out of balance can incre a s e

maintenance needs, create excess emissions, lead to safety concerns or waste fuel and money. By checking for pro p e r

operation you are able to confirm a job well done.

• This ove rv i ew will explain some of the common terms used in combustion testing

– The combustion process – (a small amount of chemistry )

– Ideal combustion – you may have heard the term Stoichiometric (or not)

– Relationship between CO2, CO and O2

• The analyzer and display

– Various text and icons used on the front housing, in the display and on the printout

– What will the readings do when adjustments are made

– W h e re are you on the combustion curves from these re a d i n g s

OMBUST I ON

ROCES S

What is really going on during combustion? Most of us know it as a fire that is generating heat and possibly

smoke. We know that paper or wood can burn when lit, and continue to burn – but what is really happening?

Combustion is a continuous chemical reaction that occurs when a certain temperature is reached, and there is the

p r esence of both fuel and an ox i d i z e r. The most common fuels are hyd r ogen and carbon, and the typical ox i d i z er is

O2 present in the air we breathe. Once the reaction is started it will continue as long as it is being fed fuel and ox y-

gen, and the temperature is sufficient.

DEAL

OMBUSTION

ROCESS

If a perfect condition

could exist for combustion it would

be the burning of pure hyd r o g e n

(H2) in pure oxygen (O2). T h i s

would give us heat and water, and

be the easiest to maintain. Tw o

h y d r ogen (H2), combine with one

O2 molecule gives us two water

molecules plus heat. The re a c t i o n

would be something like figure 1.

It is great in theory that we would

have a very efficient system with

only some heat losses from the

water vapor, but it isn’t very prac-

tical. Pure hydrogen and oxygen

are expensive to create, and diffi-

cult to handle compared to other

fuels already available.

OMBUSTION

ASICS

figure 1

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