Multi-stage cooling system with tandem compressors and optimized control of sensible cooling and dehumidification
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United States of America Patent
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Apr 19, 2016
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app pub date -
Apr 13, 2012
filing date -
Apr 19, 2011
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Abstract
A cooling system has a plurality of separate cooling stages including an upstream cooling stage having an upstream cooling circuit and a downstream cooling stage including a downstream cooling circuit, which are each a direct expansion cooling circuit including a tandem compressor. Each tandem compressor includes a fixed capacity compressor and a variable capacity compressor. A controller controls the fixed capacity compressor and variable capacity compressor of each tandem compressor based on a Call for Cooling, which of a plurality of ranges the Call for Cooling falls within, and whether the Call for Cooling is ramping up or ramping down.
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