reactors

GPG FINDINGS The GPG program enables GSA to make sound investment decisions in next-generation building technologies based on their real-world performance. www.gsa.gov/gpg AWT: ELECTROCHEMICAL FOR COOLING TOWERS CONSIDER FOR ALL COOLING TOWERS Most cost-effective in areas with high water costs or where water is excessively hard, has high pH values and/or large amounts of total dissolved solids TECHNOLOGY RESULTS M&V DEPLOYMENT How does electrochemical water treatment work? How did electrochemical water treatment perform in M&V? Where does the study recommend deploying electrochemical water treatment? 1 Electrolysis Water Treatment for Cooling Towers, Gregg Tomberlin, Jesse Dean, Jimmy Salasovich (NREL), December 2018, p.9 2 Ibid, p.21 3 Ibid, p.23 4 Ibid, p.24 5 Ibid, p.26 NATIONAL RENEWABLE ENERGY LABORATORY (NREL) assessed an alternative water treatment (AWT) system provided by Dynamic Water Technology for two 150-ton cooling towers in Savannah, Georgia. Where did Measurement and Verification occur? DECEMBER 2018 OPPORTUNITY 038 32 % WATER SAVINGS 99.8% reduction in blowdown 2 100 % CHEMICAL SAVINGS Technology generates chlorine; reduced slime 4 50 % MAINTENANCE REDUCTION Small cost increase in annual O&M contract 3 3.0 YEAR PAYBACK @ GSA avg. utility rates 5 water/sewer $16.76/kgal electricity $0.11/kWh Electrochemical Water Treatment Return-On-Investment Rebates for AWT systems are available through some local water utilities How much water do cooling towers use? 28 % OF WATER IN COMMERCIAL BUILDINGS IS USED BY COOLING TOWERS OR OTHER HEATING AND COOLING SYSTEMS 1 ELECTROLYSIS SEQUESTERS SCALE IN REACTOR TUBES AND CREATES CHLORINE, A NATURAL BIOCIDE Reactors Testbed (Before) Testbed (After) + GSA Normalized (After) * Equipment (S) N/A $30,340 $30,340 Installation ($) N/A $29,029 $15,000 Maintenance (yr) $5,280 $6,000 $6,000 Water Consumption (Gallons/yr) 3,588,156 2,454,299 2,454,299 Water Savings (Gallons/yr) N/A 1,133,857 1,133,857 Water Savings ($/yr) N/A $7,529 $19,003 Technology Electricity Use (kWh/yr) N/A 27,492 27,492 Technology Electricity Use ($/yr) N/A $2,749 $3,049 Simple Payback (yrs) 11.2 3.0 Savings to Investment Ratio 1.3 5.0 + Savannah testbed water/sewer $6.64/kgal, electricity $0.10/kWh * GSA average water/sewer $16.76/kgal, electricity $0.11/kWh

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GPG

FIN

DIN

The GPG program enables GSA to make sound investment decisions in next-generation building technologies based on their real-world performance. www.gsa.gov/gpg

AWT: ELECTROCHEMICAL FOR COOLING TOWERS

CONSIDER FOR ALL COOLING TOWERSMost cost-effective in areas with high water costs or where water is excessively hard, has high pH values and/or large amounts of total dissolved solids

TECHNOLOGY

RESULTS

M&V

DEPLOYMENT

How does electrochemical water treatment work?

How did electrochemical water treatment perform in M&V?

Where does the study recommend deploying electrochemical water treatment?

1Electrolysis Water Treatment for Cooling Towers, Gregg Tomberlin, Jesse Dean, Jimmy Salasovich (NREL), December 2018, p.9 2Ibid, p.21 3Ibid, p.23 4Ibid, p.24 5Ibid, p.26

NATIONAL RENEWABLE ENERGY LABORATORY (NREL) assessed an alternative water treatment (AWT) system provided by Dynamic Water Technology for two 150-ton cooling towers in Savannah, Georgia.

Where did Measurement and Verification occur?

DECEMBER 2018

OPPORTUNITY

038

32%WATER SAVINGS 99.8% reduction in blowdown2

100%CHEMICAL SAVINGSTechnology generates chlorine; reduced slime4

50%MAINTENANCE REDUCTIONSmall cost increase in annual O&M contract3

3.0YEAR PAYBACK @ GSA avg. utility rates5 water/sewer $16.76/kgalelectricity $0.11/kWh

Electrochemical Water Treatment Return-On-InvestmentRebates for AWT systems are available through some local water utilities

How much water do cooling towers use? 28% OF WATER IN COMMERCIAL BUILDINGS

IS USED BY COOLING TOWERS OR OTHER HEATING AND COOLING SYSTEMS1

ELECTROLYSIS SEQUESTERS SCALE IN REACTOR TUBESAND CREATES CHLORINE, A NATURAL BIOCIDE