Dehumidification of Air for Submarine and Closed Spaces in Ships - Design of Hoppers for Calcium Chloride or Other Desiccants

This report describes the experimental work on several types of apparatus devised to make use of the solid desiccants described in previous reports to dehumidify closed spaces aboard ship. As a result of these experiments a simply constructed hopper using lump calcium chloride is recommended for the majority of uses. Incidental experiments proved that in a closed compartment there is much more water absorbed on the rusty walls than is contained in the air of the compartment and hence that the amount of desiccant required is greater than would be calculated from humidity tables and the volume of the space.