Retrotec USACE - Manual (Page 258)

D128 ENERGY & PROCESS ASSESSMENT PROTOCOL
D.7.8.16 Use of Ineffi cient Burners (Ineffi ciency)
Figure D207. Old burner with low effi ciency.
Figure D208. Modern high-effi ciency burner.
Old burners with low effi ciency (Figure D207) may be candidates for upgrade
with burners now available that have extremely low turndown and use a mini-
mum of excess air. These high-effi ciency burners (Figure D208) may have an
application for a furnace or oven that has a high rate of use.
D.7.8.17 Fuel Oil Too Cold for Good Atomization (Ineffi ciency)
Figure D209. Elevated fuel oil tank.
Figure D210. Aboveground horizontal fuel oil
tank adjacent to heating plant.
Most ovens and furnaces use natural gas or propane as their fuel. It is possible to
use fuel oil as a source of heat. 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 lowest viscosity being number 6. The most common used
fuel oil is number 2, which pours most easily and is the fuel oil of choice for all
but large central energy system boilers. Number 2 fuel oil, which is commonly