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Is a heat exchanger more efficient with dry air or humid air flowwing through it. Please...

Is a heat exchanger more efficient with dry air or humid air flowwing through it. Please explane.

Engineering   Chemical-Engineering   
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Answer #1

Yes, dry air heat exchanger is more efficient. Because it has less specific heat comparatively. Therefore heat duty would be very less. Also the specific volume of dry air is more than humid air. Which is a favourable factor in heat exchanger. There would be efficient heat transfer. But when you are operating an industrial scale operation, you also have to keep the cost in consideration. Therefore, the cost of dehumidification and the cost save in heat duty also will be a cumulative factor. It the cumulative cost is less then only it is economically efficient.

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