Fieldpiece HG2 - HVAC Guide System Analyzer Manual de usuario descargar pdf (Pagina 34)

WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.F

ELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.C

Combustion Basics

Combustion is the rapid oxidation of fuel. Oxygen

from air (20.9% oxygen & 79.1% Nitrogen) is used to

burn fuel producing heat.  e appliances installed and

serviced by technicians, rely on clean e cient  ames to

produce the energy needed to heat homes and hot water

etc. Combustion testing is necessary to maximize the ef-

 ciency of the combustion systems and to minimize the

harmful emissions produced. Carbon monoxide and

carbon dioxide (greenhouse gas emissions) are products

of combustion. Proper tuning of the combustion pro-

cess by combustion testing will reduce the production

of harmful carbon monoxide and decrease the amount

of fuel burned through the increase in e ciency.

Combustion e ciency can typically be increased by

creating a more balanced Air to Fuel ratio.  e ratio of

air to fuel determines how much CO

is produced and

how e cient the  ame is.

Tuning of the O

, CO

excess air, stack temperature

and temperature rise to match the appliance manufac-

turers speci cations will increase the e ciency and help

to maximize the performance and life expectancy of the

equipment.

A properly tuned atmospheric natural gas or pro-

pane  red appliance will have approximately 6 to 9% O

in the  ue gases. Fuel oil appliances with  ame retention

burners will have approximately 3 to 7% O

in the  ue

gases. For a more detailed breakdown see the chart on

page 32.

Testing and adjustment to the combustion process

ensures that the highest combustion e ciency is safely

achieved, thereby reducing the overall amount of fuel

used in producing the energy needed. It is still necessary

to test and adjust the appliance to the manufacturers’

speci cation for air ow in the duct system, temperature

rise across the heat exchanger and anything else that

may need testing. Testing and balancing of appliances

to meet manufacturers’ speci cations helps to ensure

maximum system e ciency and equipment longevity.

Combustion testing does not take into account start

up losses, standby losses, cabinet/boiler body losses, or

distribution losses in ducts or piping.

5 Content adapted from Erik Rasmussen's book Combustion Analysis and Fuel

Eﬃ ciency

Figure 34. Entering the CO measurement for the Combustion Test us

ing an ACM3 Carbon Monoxide Head and the pump that's included

with the AOX2 Combustion Check Head.

Below is Fig 4-9 from the book Combustion Analy-

sis and Fuel E ciency, Erik Rasmussen ESCO Press

2007.

Supply

Plenum

Flue

1 2 ... 29 30 31 32 33 34 35 36 37

Comentarios a estos manuales

Sin comentarios

Fieldpiece HG2 - HVAC Guide System Analyzer Manual de usuario Pagina 34

Comentarios a estos manuales

Relacionado con productos y manuales para Instrumentos de medición Fieldpiece HG2 - HVAC Guide System Analyzer