S24 -- Desiccant Dehumidification and Pressure-Drying (I-P)

Dehumidification is the removal of water vapor from air, gases, or other fluids. There is no pressure limitation in this definition, and sorption dehumidification equipment has been designed and operated successfully for system pressures ranging from subatmospheric to as high as 6000 psi (40 MPa). In common practice, dehumidification usually refers to equipment operating at essentially atmospheric pressures and built to standards similar to other types of air-handling equipment. For drying gases under pressure, or liquids, the term dryer or dehydrator is normally used.

This chapter mainly covers equipment and systems that dehumidify air rather than those that dry other gases or liquids. Both liquid and solid desiccants are used; they either adsorb water on the desiccants surface (adsorption) or chemically combine with water(absorption).

Chapter Table of Contents

Methods of Dehumidification
DESICCANT DEHUMIDIFICATION
Liquid-Desiccant Equipment
Solid-Sorption Equipment
Rotary Solid-Desiccant Dehumidifiers
Equipment Operating Recommendations
Applications for Atmospheric-Pressure Dehumidification
DESICCANT DRYING AT ELEVATED PRESSURE
Equipment
Applications

ISBN: 978-1-936504-25-1 (for I-P versions of chapters)
ISSN: 1078-6066 (for I-P versions of chapters)

Citation: 2012 ASHRAE Handbook -- HVAC Systems and Equipment: Chapter 24, Desiccant Dehumidification and Pressure-Drying



Product Code(s): D-S242012I-P