2015 ASHRAE TECHNOLOGY AWARD CASE STUDIES a major cooling demand and need cooling availability yearround. The design team originally adopted the installation of a water-cooled chiller with a cooling tower. However, locating a cooling tower within a green residential complex wasn't obvious. Besides affecting the aesthetics of the green complex, the cooling tower installation could have incurred a high cost in civil work to respect the city regulations and meet a minimum social acceptance from 660 families living in the residential complex. Cold Water In Water Meter M Two Water Tanks 30,000 gallons www.info.hotims.com/54427-32 ashrae.org Booster Pumps VFD Pump 2xPHE Storage Hot Water to Complex 720 gallons 170 tons Heat Recovery Chiller For Radiology Clinic To WSHP for Offices 30 tons FIGURE 1 Domestic hot water piping. With 26,500 gallons daily consumption of domestic hot water, the idea of recovering the heat generated by the clinic chiller to preheat domestic water complex seemed ASHRAE JOURNAL Off-Peak Electric Heating 3 × 500 MBH 1150 gallons 1 × 1,000 MBH 550 kW Project Description 76 Condensing Gas Heating Recirculation Pump 70 gpm APRI L 2015 very trivial. However, the design team went beyond heat recovery and proposed the operation of the new chiller without any cooling towers. This proposal was made possible by using the two existing concrete tanks as both www.info.hotims.com/54427-29