The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about ____________ percent?
Correct answer: B. 40
- A. 15
- B. 40
- C. 70
- D. 85
Explanation
A walking-beam slab-reheating furnace typically has a thermal efficiency near 40 percent, with the remainder lost through exhaust gases, furnace walls, openings, and cooling systems. Values such as 70 or 85 percent are generally too high for this furnace type without exceptional heat recovery.
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