District Energy - 2007 Third Quarter

began revealed just how effectively the system was working (fig. 2). After two months, the sand filtration system had removed 98 percent of the particles less than 1 micron that had previously been present in the closed water loop. The system also removed 99 percent of all particles between 1 and 8 microns and 100 percent of the particles between 9 and 16 microns that had been present earlier.

The cold energy of Enwave’s 2. 5 mil-lion-gal subterranean loop has the capacity to cool 34. 5 million sq ft of office space, eliminating harmful ozone-depleting refrigerants and removing 79,000 tons of carbon dioxide from the air – the equivalent of taking 15,800 cars off the road. The system will also save customers millions of dollars in electric power usage, providing price stability in a volatile energy market and reducing building owner exposure to peak electric power usage costs in morning hours when most convention air-conditioning systems are

brought on line. Now equipped with sand filtration, the Toronto system is experiencing even greater efficiencies and reliability, optimizing the system’s performance.

Ron Exelby is founder and principal of XLB Water Solutions of Mississauga, Ont. Established in 1999, the firm provides consulting services on HVAC water treatment-related issues for clients in the industrial, commercial, institutional and health care sectors. XLB Water Solutions also represents Sonitec and Trojan Technologies in Greater Toronto and southern Ontario. Previously, Exelby worked for Betz Dearborn, now GE Water & Process Technologies. He can be reached at ron.xlb@sympatico.ca.