Retrotec USACE - Manual (Page 191)

Appendix D D61
will use approximately 1.5% of the steam output, while a electrically driven air
compressor could replace it. If a steam-atomizing burner is found on a fuel oil
boiler (especially if the burner is old and approaching the end of its useful life),
consider replacing it with an air-atomizing burner.
D.4.1.30 Use of Ineffi cient Burners (Ineffi ciency)
Figure D106. Modern high-effi ciency burner.
There are burners available that have extremely low turndown and use a mini-
mum of excess air. These types of burners may have application for central
energy system boilers as well as for those that are required to operate all year
(Figure D106).
D.4.1.31 Fuel Oil Too Cold for Good Atomization (Ineffi ciency)
Figure D107. Elevated fuel oil tank. Figure D108. Aboveground horizontal fuel oil
tank adjacent to heating plant.
Unlike natural gas, fuel oil needs to be atomized for proper combustion. It is
a liquid at room temperatures and can be purchased in fi ve grades, with the