In drying wool by forced air flow to a uniform regain in the range 8% to 16%, the amount of water removed per unit volume of air used is almost independent of the air temperature. , In view of this, the paper examines the practicability and economics of using unheated air for wool drying. Running costs depend on the atmospheric humidity , at the location of the dryer, but usually are appreciably lower than those of an efficient steam-heated dryer. The air intake per pound of water removed is much greater than in conventional dryers but the blower power required is approximately the same. No circulation is used, and this permits close control of the regain of the wool leaving the dryer.
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