Water Conservation Through Closed-Loop Temperature Control Units (TCU) in a Polymer Processing Plant

Img 7012 (1)

Background

A leading polymer manufacturing company was operating multiple mixing and extrusion lines using a conventional Bleeding type TCU.

In this arrangement, cooling water from the plant header was continuously supplied to the process jackets. After absorbing heat from the process, the water was discharged back to the cooling tower without recirculation.

Although this method provided adequate cooling, it resulted in:

With increasing emphasis on sustainability and water conservation, the customer sought a more efficient solution.

Objective

Reduce process water consumption while maintaining precise temperature control and improving operational efficiency.

Working Principle

The closed-loop TCU maintains a dedicated volume of treated water circulating between the TCU and the process equipment.

The process water never comes into direct contact with the plant cooling water.

Heat removed from the process is transferred through the plate heat exchanger to the secondary cooling water circuit, after which the process water is recirculated.

Only a small quantity of water is required during initial filling or periodic maintenance, eliminating continuous water wastage.

Dynetics Solution

Dynetic Products supplied a Closed-Loop Temperature Control Unit (TCU) specifically engineered for the customer’s polymer processing application.

Unlike the conventional bleeding system, the TCU continuously circulates the same treated water through the process equipment.

The system consists of:

The circulating water transfers heat from the process to the plate heat exchanger, where it is cooled indirectly using plant cooling water. The process water remains within the closed circuit and is continuously reused.

The Challenge

The customer required a system that could:

PARTNER WITH INDUSTRY EXPERTS

Transform Your Process Performance with Dynetics

Leverage over three decades of engineering expertise to optimize production, improve process stability, and achieve long-term operational success.

Implementation

The project included:

The TCUs were integrated with the customer’s existing polymer processing lines without major modifications to the production equipment.

Results

Significant Reduction in Water Consumption

The continuous discharge of cooling water was completely eliminated.

The process water now circulates in a closed loop, resulting in substantial savings in annual water consumption.

Improved Temperature Stability

Since the same conditioned water continuously circulates through the process, temperature fluctuations were significantly reduced.

This resulted in improved process consistency and enhanced product quality.

Lower Cooling Tower Load

Only the heat load is transferred to the cooling tower through the plate heat exchanger.

The cooling tower no longer handles large volumes of once-through process water, reducing its operating load.

Reduced Pumping Energy

The dedicated circulation system requires significantly lower make-up water flow, reducing pumping requirements throughout the plant.

Reduced Maintenance

Because treated water remains within the closed circuit:

  • Scaling is minimized.
  • Corrosion is reduced.
  • Equipment life is extended.
  • Cleaning frequency decreases.

Sustainable Manufacturing

The project directly supported the customer’s sustainability initiatives by conserving water and improving utility efficiency.

Customer Benefits

  • Significant reduction in process water consumption.
  • Elimination of continuous cooling water bleeding.
  • Improved process temperature control.
  • Better product consistency.
  • Lower cooling tower operating costs
  • Reduced water treatment requirements.
  • Lower maintenance costs.
  • Increased equipment reliability.
  • Reduced overall operating expenditure.

Conclusion

By replacing the conventional once-through cooling arrangement with Dynetic’s Closed-Loop Temperature Control Units, the customer transformed an inefficient, water-intensive process into a sustainable and energy-efficient operation.

The project not only delivered substantial water savings but also improved temperature control, reduced maintenance, and lowered operating costs. The successful implementation demonstrates how closed-loop TCUs can play a vital role in modern polymer processing plants where water conservation, process reliability, and operational efficiency are key priorities.

Outcome

 The customer achieved a sustainable Temperature control solution that significantly reduced water consumption while improving process stability, lowering operating costs, and supporting long-term environmental goals.

Let's Build Better Process Performance

Ready to Optimize Your Thermal & Process Systems?

Partner with Dynetics to improve process stability, energy efficiency, and operational reliability through customized thermal engineering and automation solutions.