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Enhance Cooling Tower Efficiency: Sustainable Water Treatment Strategies

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Join Sustainable Management Resources, Inc. (SMRI) in San Diego, CA, as we focus on “Creating a Sustainable New Economy” through innovative cooling tower water treatment. Learn the fundamentals of cooling tower operation, including the crucial role of evaporation, conduction of scale control, and corrosion prevention. Discover effective water treatment methods like scale inhibitors, biocides, and monitoring techniques that save water and costs. Optimize your cooling systems while promoting sustainability and efficiency. For more information, contact Steve Kaplan at 858-229-0149 or Stev@SustainableMRI.com.

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Enhance Cooling Tower Efficiency: Sustainable Water Treatment Strategies

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  1. Sustainable Management Resources Inc Join SMRI as we work on: “Creating a Sustainable New Economy” SMRI, San Diego CA, ~ 858.229.0149 ~ Steve Kaplan ~ Steve@SustainableMRI.com

  2. Basics of Cooling Tower Water Treatment • Cooling towers reduce water temperature through evaporation, a high-energy phase change • Only water leaves the system as a vapor, mineral content remains • Minerals dissolve until the saturation point is reached, then scale begins to form • When the mineral content is twice the level of the makeup water supply- 2 cycles of concentration have been reached SMRI, San Diego CA, ~ 858.229.0149 ~ Steve Kaplan ~ Steve@SustainableMRI.com

  3. Basics of Cooling Tower Water Treatment • Conductivity is the measure of dissolved solids • pH is the measure of the relative acidity or basicity of the water • These 2 parameters are convenient methods to monitor and control scale formation and corrosion SMRI, San Diego CA, ~ 858.229.0149 ~ Steve Kaplan ~ Steve@SustainableMRI.com

  4. Causes of lost efficiency • Calcium carbonate is the most common type of scale • Calcium Carbonate Scale- 1/10” causes loss of efficiency of up to 40% • Corrosion- Causes loss of heat transfer and leaks • Biological growth- causes loss of heat transfer and can cause disease SMRI, San Diego CA, ~ 858.229.0149 ~ Steve Kaplan ~ Steve@SustainableMRI.com

  5. Control through Water Treatment • Scale inhibitors- increase solubility • Acid reacts with carbonates and releases CO2, increases saturation point  • Softeners remove Ca and Mg (scaling cations) • Corrosion inhibitors- coat or react specifically with certain metals • Biocides- slug dosed or continuously fed for bacterial control SMRI, San Diego CA, ~ 858.229.0149 ~ Steve Kaplan ~ Steve@SustainableMRI.com

  6. Monitoring and Control • Conductivity, pH, ORP and corrosion • Chemicals levels and feed verification • Temperatures- inlet and outlet of tower, inlet and outlet of chiller , chilled water, etc • Flows- through tower, chiller, etc • Pressures- chillers • Makeup and bleed-off water meters-ROI SMRI, San Diego CA, ~ 858.229.0149 ~ Steve Kaplan ~ Steve@SustainableMRI.com

  7. Water Evaporation Credits • Evaporation = (Tonnage) x (0.03) x (% load)  • Example- 1000 tons x .03 x .70 = 21 gpm  • Based on a 12 hour day- evaporation = 15,120 gallons • On a yearly basis (260 days) that is 3,931,200 gallons of evaporated water • 3,931,000 gallons x $2.75 per 1000 gals of water* = $10,810.00 per year savings  *Low estimate for most areas and increasing yearly SMRI, San Diego CA, ~ 858.229.0149 ~ Steve Kaplan ~ Steve@SustainableMRI.com

  8. Bleed-off Reduction • Bleedoff = Evaporation Cycles of concentration-1 3,931,000 gallons = 2,620,666 gallons bleedoff annually 2.5 (cycles of conc)-1  • Using acid or side stream softening: • 3,931,000 gallons = 1,123,142 gallons bleedoff 4.5(cycles of conc)-1 • 1,497,524 gallons of water saved from the sewer= $4,118 • At a cost of $4.00 per 1000 gallons of treatment= $5,990 • Total saved from acid use or softening= $10,108 annually SMRI, San Diego CA, ~ 858.229.0149 ~ Steve Kaplan ~ Steve@SustainableMRI.com

  9. Cooling Tower schematic Typical Cooling Tower Installation 4-20mA In Corrosion DI In DI In

  10. SMRI, San Diego CA, ~ 858.229.0149 ~ Steve Kaplan ~ Steve@SustainableMRI.com

  11. www.SustainableMRI.com Thank you SMRI, San Diego CA, ~ 858.229.0149 ~ Steve Kaplan ~ Steve@SustainableMRI.com

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