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Which type of air heater consists of a bunch of hollow leaves of sheet metal?

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Which type of air heater consists of a bunch of hollow leaves of sheet metal?

(a) Plate air heater

(b) Tubular air preheater

(c) Regenerative

(d) Integral

The question was posed to me during an online interview.

I'm obligated to ask this question of Boiler Mounting Accessories in section Steam Generators & Accessories of Energy Engineering

1 Answer

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Best answer
Right choice is (a) Plate air heater

Explanation: The plate type air heater consist a bunch of hollow leaves of sheet metal electrically welded and assembled in housing. The spacing between the adjustment leaves and the width of the opening of leaves are such that air and gas passages are of different widths.

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