METHOD AND PLATE APPARATUS FOR DEW POINT EVAPORATIVE COOLER

摘要

An improved method and apparatus for indirect evaporative cooling of a fluid stream to substantially its dew temperature. Plate heat exchanger has perforations (11) and channels (3, 4 and 5) for gas or a low temperature for liquids on a dry side and wet side. Fluid streams (1) flow across the dry si de (9), transferring heat to the plate. Gas stream (2) flows across the dry sid e and through perforations to channels (5) on wet side (10), which it then coo ls by evaporative cooling as well as conductive and radiative transfer of heat from plate. A wicking material provides wetting of wet side. In other embodiments, a desiccant wheel may be used to dehumidify the gas, air stream s may be recirculated, feeder wicks (13) and a pump may be used to bring water form a water reservoir, and fans may be used either force or induce a draft.