Indirect evaporative cooling heat exchanger
AssigneeEntrodyne Corporation
InventorNicholas H. Des Champs
Life of this patent
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Abstract
A heat exchanger including a header having a plurality of header openings with rigid tubes that may be made of plastic are inserted in the openings. The tubes are sealed to the header to prevent leakage between the header and the tubes to prevent water and air leakage between the wet, scavenger air stream flowing through the tubes and a dry air stream flowing around the tubes. A method of making the heat exchanger includes providing the openings with a flange and uses an interference fit between the rigid heat exchange tubes and the header openings. A self-leveling sealant may be used to seal the heat exchanger tubes to the header using, for example, a paint roller and/or a paint sprayer.
Claims26
A heat exchanger for an indirect evaporative cooling unit, comprising:
- a header having a plurality of openings therethrough, each of the openings having an inwardly rolled edge forming a flange;
- and
- a plurality of rigid tubes inserted in the openings and sealed to the header, wherein
- the structure of the plurality of rigid tubes and header allows water and air to flow through at least one of the plurality of rigid tubes simultaneously.
A method of forming a heat exchanger, comprising:
- providing rigid heat exchanger tubes;
- providing at least one rigid heat exchanger header with openings sized to fit the rigid heat exchanger tubes;
- providing flanges for the header openings;
- fitting the rigid heat exchanger tubes into the header openings;
- locating an edge of the rigid heat exchanger tubes to be substantially flush with an exterior surface of a header;
- sealing the heat exchanger tubes and at least one header;
- and
- flowing water and air through the rigid heat exchanger tubes to exchange heat.
Dependencies are inferred from the claim text.