Importance

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Abstract

A multiple mode hybrid heat exchanger apparatus includes a frame assembly, an indirect heat exchange section, a spray system, an intermediate distribution basin, a direct heat exchange section, a vertical passage, a lower air inlet, a cold water collection basin, and a fan. The frame assembly includes a first end wall, a second end wall that opposes the first end wall, a first side wall that extends between the first and second end walls, and a second side wall that opposes the first side wall that extends between the first and second end walls. The direct heat exchange section is disposed below the indirect heat exchange section. The vertical passage is defined by the frame and the direct heat exchange section. The lower air inlet is defined by a plurality of openings n the direct heat exchange section. The lower air inlet is configured to provide an inlet for air into the vertical passage, The cold water collection basin is disposed below the direct heat exchange section. The fan is to induce a flow of air through the lower air inlet. The multiple mode hybrid heat exchanger is selectably configured to operate in an evaporative mode, a dry mode, and an adiabatic mode. The evaporative mode of operation includes activation of the spray system over the indirect heat exchange section, air enters the vertical passage through the direct heat exchange section, and the airflow also passes through the indirect heat exchange section. The dry mode of operation includes deactivation of the spray system, air enters the vertical passage through the direct heat exchange section, and the airflow then passes through the indirect heat exchange section. The adiabatic mode of operation includes the spray system is bypassed on the indirect heat exchange section, the direct heat exchange section is configured to facilitate a passage of water therethrough. The air enters the vertical passage through the direct heat exchange section, the air passing horizontally across a flow of water to directly cool the water. The water is collected in the cold water collection basin. The airflow then passes through the indirect heat exchange section.

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First Claim