Los Angeles Cooling Water Conservation Case Study
DATA SUMMARY:
68% CAPEX covered by rebates, 9 month payback, $66,000 annual water savings
OVERVIEW
The cooling system at these two, 52-story office towers in Los Angeles supplies comfort cooling to 2.5 million square feet of Class A office space. If the cooling system were to fail or experience reduced functionality, the negative impact on the tenants in the building would be significant.
The cooling system consists of an eight-cell 8,000 ton cooling tower providing cooled water to HVAC chillers. Because replacing a tower of this size on the roof of the building would be cost prohibitive, protection and extending the life cycle of this tower is paramount
OUR SOLUTION
After meeting with management for these buildings, Capture H2O recommended the High Cycle Program to drastically cut water and chemical usage.
An added benefit for management at these buildings was the massive savings potential in the form of city-wide rebate programs. The rebate programs available from LADWP and MWD offer rebates of up to $7.00/kgal of water savings for four years and $0.60/kgal or water savings for ten years, respectively. The massive rebate programs and efficiency of the High Cycle Program led to:
1. A reduction of tower blowdown from 4.2 million gallons to just 524 thousand.
2. An 88% reduction in blowdown that realized $66,000 in annual water savings.
3. 68% of CAPEX being covered by LADWP and MWD rebate programs.
4. A payback of only 9 months after all rebates were applied to the install.
SITE:
High Rise Commercial Office Tower
PROGRAM:
High Cycle
PROJECT SCOPE:
1 eight-cell cooling tower providing cooled water to HVAC chillers
DATA SUMMARY:
68% reduction of out-of-pocket CAPEX, 9-month payback, $66,000 in annual water savings
SUMMARY
This Los Angeles office tower is a powerful example of how utilizing local rebate programs makes our water-savings programs even more lucrative. The water savings from the Capture H2O High Cycle Program will payback the project within one year, putting all subsequent savings back into our customer’s pocket.
