USING OUR WATER SMARTER
On the ADI Philippines campus, just one building (B1) consumes 71% of the site’s water supply. The three main water uses in it are the Cooling Towers, Deionized Water (DI) use and domestic use. Knowing how much this building stands out as a high-usage case, we put our minds to devising an opportunity to reduce our resource impact—and decided to start by recycling B1’s used DI water for Cooling Tower use.
A Cooling Tower is a heat exchanger that uses air to help cool water, which is then used to cool the refrigerant of HVAC Chillers. But if water from the heat exchange is exposed to open air, there’s a chance for contamination, cooling inefficiencies, scaling, algae growth and the like. So the water regularly needs to be flushed and simultaneously replaced with fresh water.
Instead of continuing to pull water from a public source, we installed a filtration system to use DI water as a source for our Cooling Tower’s flushing system. This meant there was no net new water needed to refresh the Cooling Tower, saving 9,000 cubic meters, or 2.3 million gallons, per month.