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Method and apparatus for reheat dehumidification with variable air volume

  • US 10,641,516 B2
  • Filed: 05/24/2019
  • Issued: 05/05/2020
  • Est. Priority Date: 11/30/2015
  • Status: Active Grant
First Claim
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1. A heating, ventilation, and air conditioning (HVAC) system for regulating humidity of an enclosed space, the system comprising:

  • a metering device fluidly coupled to an evaporator coil via a distribution line;

    at least one controller operatively coupled to a temperature sensor that is thermally exposed to the distribution line and to a variable-speed circulation fan;

    wherein the at least one controller is configured to;

    determine a latent cooling load based on a relative-humidity setpoint;

    determine an optimal distributor line temperature that corresponds to the latent cooling load;

    compare a measured distributor line temperature to the optimal distributor line temperature; and

    responsive to a determination that the measured distributor line temperature exceeds the optimal distributor line temperature, wirelessly transmit a signal to the variable-speed circulation fan to reduce a speed of the variable-speed circulation fan thereby lowering a surface temperature of the evaporator coil.

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