Energy and water recovery using air-handling unit condensate from laboratory HVAC systems

Since laboratories require high volumes of 100% outside air, data show they are the perfect candidates to re-use relatively pure, cold condensate. This study analyzes AHU condensate utilization for both energy and water recovery modes; evaporative pre-cooling for sensible energy recovery, and condensate as a source for cooling tower make-up water. An optimization scheme is presented that maximizes energy and water savings based on outside air enthalpy, condensation generation, and energy recovery mode.