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Leading global automaker reduces water usage per vehicle by 15% with Water Flow Intelligence
Background
One of the world’s largest automakers sought to reduce its water usage per vehicle as part of a long-term goal to improve sustainability in its vehicle manufacturing processes. As a longtime strategic partner of the company, Nalco Water was asked to help identify areas for water reduction without negatively affecting quality or production.
From Nalco Water’s experience in the Automotive industry, pretreatment is among the most water-intensive processes within the plant and the biggest opportunity to reduce water consumption. The pretreatment area prepares vehicle bodies for painting using multiple chemical baths and water-rinse stages.
Water balance in the pretreatment area is typically managed manually with minimal visibility to actual water usage. The plant did not have meters in most locations, and the few available meters were rarely checked. Even in areas with water meters, the optimal flow rate was never determined so changes to flow rarely happened and water was often overused.
Solution
Nalco Water responded with Water Flow Intelligence, a digitally enabled programme that uses real-time flow monitoring to help better manage water balance. Data and insights from impactful locations are sent to a secure cloud-based portal, allowing visibility and triggering alerts when water flow rates exceed prescribed limits. Real-time monitoring and smart alarms allow leaks and overuse to be identified and addressed quickly. The programme was installed at one of the automaker’s North American plants to demonstrate its capabilities.
Over time, the data collected by Water Flow Intelligence also allowed the site to set benchmark flows. Placards were placed by flowmeters, displaying target flow rates so adjustments could be made if the flow was outside of range, optimizing water usage while also ensuring enough water was used to maintain performance. For instance, the rinse stages were supposed to use 50 gallons per minute (gpm) of water flow to ensure full rinse of the vehicle before the e-coat bath. Without the programme, flow rates varied greatly based solely on the operators’ judgment.
In another example, Water Flow Intelligence’s smart alarming capabilities and the ECOLAB3D™ digital platform identified excessive water use in the phosphate area – more than 91,000 gallons. These alarms prompted the on-site team to investigate. The Nalco Water team identified the boiler blowdown as the source of the overuse and quickly fixed the issue. Without Water Flow Intelligence, this type of leak would have gone undetected for months.
Once the leak was repaired, usage in the following month was 300 gallons, confirming the leak had been fixed. Now, the plant uses Water Flow Intelligence to ensure the gains are maintained year over year.
Results
In this dynamic system, continuous real-time visibility and support have enabled optimization of assets and allowed the plant to leverage best practices to improve performance across all respective water systems. Water Flow Intelligence has helped the site achieve a 15% reduction in water usage per vehicle, resulting in 25 million gallons of water per year and more than $190,000 in savings.Conclusion
The Water Flow Intelligence programme has raised awareness across the site regarding optimal water usage, helped identify when and where water is being overused, and empowered the local plant team to take corrective action. The plant has been commended as an example of how Water Flow Intelligence can help the automaker’s enterprise and established a new standard. In the months since, the programme has been implemented for benchmarking, alarm management and improvement validation at 10 additional sites with similar results.
Annual Savings
WATER
Reduced water usage by
25 million gallons annually
PRODUCTIVITY
Real-time insights helped the plant make better, faster decisions to improve water balance
Total Value Delivered
$193
THOUSAND
USD ANNUALLY