Page 27 - PDZA Sustainable Aquarium Brochure

CONSERVING WATER: A BIG DEAL

HERE ARE THE MAIN STEPS WE TOOK Avoid Evaporative Cooling Conventional cooling
TO CONSERVE WATER systems often rely on water cooled chillers.
These systems also often rely upon cooling
Reducing Use To conserve water, the first towers to reject heat to the atmosphere using
effort is to reduce water use. This can be an evaporative cooling process. Evaporation of
accomplished using low flow urinals, toilets water, and the required periodic flush cycles to
and showers and faucet control devices for reduce the particles of concentration, require
lavatories. Combined, these fixtures reduce significant amounts of potable water. Due to the
overall water use by 42% when compared with mild climate in Tacoma, we leveraged air cooled
more conventional fixtures (Figure 12). technology in combination with heat pumps
and avoid using water to reject heat without
taking a significant energy use penalty. We have
estimated a potable water use savings of 381 kGal
per year in savings by leveraging the air source
heat pump technology.

Figure 12—Baseline and Proposed Plumbing Fixture Water Use

CASE STUDY: THE PACIFIC SEAS AQUARIUM AT POINT DEFIANCE ZOO & AQUARIUM 27