HYBRID HEAT EXCHANGE APPARATUS

WIPO Patent Application WO/2011/056412

A3

A hybrid heat exchange apparatus (10, 10', 10") for indirectly transferring heat between a process fluid and ambient air includes an evaporative heat transfer cell (12) operative in a wet mode or a dry mode, a dry heat transfer cell (14) and a fan (100). The air may bypass the dry heat transfer cell (14) to flow through a first air passage (39, 103) or may flow through a second air passage (46, 105) through the dry heat transfer cell (14), and in either event, then through the evaporative heat transfer cell (12). The air may partially flow through and partially bypass the dry heat transfer cell (14), and then through the evaporative heat transfer cell (12). The evaporative heat transfer cell (12) optionally may include a direct contact evaporative heat exchanger (104). Manually or automatically controlling air flow based on ambient conditions provides efficient and economical control of the hybrid heat exchange apparatus (10, 10', 10"), while avoiding problems in freezing conditions.

BENZ STEVEN M (US)
HEGG TREVOR H (US)
BUGLER THOMAS WILLIAM (US)
VADDER DAVEY JOE (US)

PCT/US2010/053158

April 12, 2012

October 19, 2010

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EVAPCO INC (US)
BENZ STEVEN M (US)
HEGG TREVOR H (US)
BUGLER THOMAS WILLIAM (US)
VADDER DAVEY JOE (US)

F28C1/14; F28B1/06; F28D5/02; F28F27/00

WO1999030096A1

1999-06-17

JPH03117888A	1991-05-20
US3831667A	1974-08-27
JPS6089682A	1985-05-20
DE19521814C1	1996-11-21

NADEL, Alan, S. et al. (One Commerce Square Suite 2200,2005 Market Stree, Philadelphia PA, US)

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