الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
Humidification-Dehumidification desalination ( HDH ) process is an existing,
widely-spread and developing technology. This technology has high potential to
serve people who suffer lack of water at undeveloped, poor countries as it could be
built and operated using locally available natural resources.
HDH cycle is considered man-made rain cycle. It utilizes vaporization of water
from saline solution into a carrier gas (usually air). Then this saturated air with
water vapor passes over a cold surface, leading to condensation process obtaining
fresh potable water suitable for human usage.
This work focuses on the heat and mass transfer processes inside each of the
humidifier and the dehumidifier sections. In the humidifier process, counter flow
between air and water at atmospheric pressure, where direct contact between air
and water occurs. In the dehumidifier section, air flows over a coil containing
flowing water in opposite direction. Based on mass balance and governing flow
equations, the mathematical modeling equations of both humidifier and
dehumidifier sections are established. Outputs were achieved through optimizing
a matlab model with imbedded integration capabilities at different inlet conditions
at both sub-cycle.
Output results of simulation process depend on liquid-gas ratio, entering
temperature of air in addition to water temperature entering both sections as
well as the height of both humidifier and dehumidifier.
These design parameters can provide great reference significance for the design,
optimization and regulation of humidifiers and dehumidifiers sections.