AquaMAXTM 2.0 vs. Chemical Treatment for Cooling Towers

Carbon Footprint
Technology Comparison

The Analysis

A large pharmaceutical company's R&D campus utilizes chemical treatment to maintain the condenser cooling water systems, and heat exchange surfaces. The client desired an alternative to chemicals being added to the recirculating cooling water since the wasted "blowdown" from the cooling water loop is discharged to a tributary that has strict environmental permit limitations. The client also has corporate goals of reducing water consumption in all areas of operation.

Crown Solutions has provided water management products and services to the client for a number of years and offered the AquaMAXTM 2.0 system to achieve the client's objectives. A cooling water system treated with an AquaMAXTM 2.0 device does not require chemical deposit / corrosion inhibitors, or biocides to protect the surfaces in the cooling loop. The capabilities of the technology are a seamless match with the client's goals of reducing water consumption and improving the characteristics of the discharge water.

Technology Design Data

The client selected an HVAC cooling system for the AquaMAX trial due to its ease of installation. The HVAC evaporative cooling tower system is a dual 5,000 ton process with a remote sump and pump well, which operates year round for comfort cooling. It had been treated with 3 different chemical products to provide protection for the heat transfer surfaces in the system. In addition, ion exchange softeners were operated on the make up water to the cooling tower to remove hardness salts.

The AquaMAXTM 2.0 eliminated the chemical treatment products, and the need for softening the make up water. The AquaMAXTM unit is designed to process the entire system volume 10 times per day. The contact between the AquaMAXTM and the system water provides ample time for sterilization and hard water precipitation reactions to take place in the reaction chamber on the AquaMAXTM unit.

Evaluation Boundaries

Before the unit was installed, a set of key performance indicators (KPI's) were established that would demonstrate success for the AquaMAXTM technology. There was long term historical data to support the past performance of the chemically treated cooling system. The KPI specifications included: chiller approach temperatures, cycles of concentration, microbiological levels, and corrosion rates.
All of the data would be gathered and maintained by the client and displayed graphically to monitor the system performance.

The carbon footprint of the AquaMAX treated system is significantly less than the same system operating with chemical treatment. The reduction in water consumption, as well as the freight and production inputs associated with the chemical products presents a larger carbon footprint when compared to the power consumption required to operate the AquaMAXTM. The fact that the AquaMAXTM treated system has no additives in the discharge water is another significant operating benefit with the AquaMAXTM technology.

Carbon Footprint over Life Expectancy of the System

 

Conclusions

The AquaMAXTM 2.0 has demonstrated success on the key performance indicators of system operation, and it has achieved the desired carbon footprint reduction. The client is very pleased with the AquaMAXTM technology because it is consistent with their overall corporate goals for operational sustainability and safeguarding the environment.

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