Fuel economy in furnaces can be achieved by_________________?
Correct answer: A. All A., B. and C.
- A. All A., B. and C.
- B. Preheating the combustion air
- C. Reducing the heat loss through furnace openings & doors
- D. Using oxygen enriched combustion air
Explanation
Oxygen enrichment and combustion-air preheating reduce the energy needed for combustion and lower flue-gas heat losses, while sealing openings reduces direct heat escape and air infiltration. Therefore, all listed measures improve fuel economy.
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