Cooling Tower Upgrade & Reconstruction Thailand

We offer cooling tower upgrade and reconstruction services in Thailand to help industrial plants modernise aging systems, increase cooling capacity, and significantly improve energy efficiency.

Whether your tower is underperforming, has reached the end of its structural life, or your process demands have grown beyond the original design, Synergy Services can engineer a solution — from targeted retrofits to complete reconstruction.

Our Upgrade and Reconstruction Solutions

Performance Retrofitting

Upgrade specific systems within an existing tower to recover or exceed original performance:

• High-efficiency fill media replacement (film fill upgrade from splash fill) — see Fill Replacement: High-ROI Investment for a measured example and typical payback
• Fan and drive system upgrade to variable frequency drives (VFD)
• Water distribution system redesign for improved uniformity
• Drift eliminator upgrade for lower carryover loss

Capacity Expansion

Increase the cooling capacity of an existing tower without building a new structure:

• Basin enlargement and additional cells
• Fan stack height extension
• Increased fill depth installation
• Riser and distribution header upsizing

Structural Reconstruction

When a tower’s structure has reached the end of its useful life but the site and civil foundations are sound:

• Complete casing, basin, and fill replacement with modern materials (FRP or concrete)
• New fan deck and mechanical equipment
• Updated water distribution and eliminator systems
• Structural engineering review and certification

Energy Efficiency Optimisation

Reduce operating costs through targeted upgrades:

• Fan blade replacement with aerodynamically efficient designs
• VFD installation on fan motors for variable-speed operation
• Fill optimisation to reduce required fan airflow
• Water treatment system integration

Retrofit or Reconstruct? How to Decide

A performance test and a structural assessment of the foundations and basin are what tell you which column applies to a specific tower before a scope is written.

Where Standard Fans Lose Their Work

Even a well-maintained axial fan often moves less air than its motor could deliver. The losses are mechanical, not electrical:

• Tip backflow — tip clearance and casing shape let high-pressure discharge air leak back past the blade tip into the plenum instead of leaving through the stack, so less air is drawn through the fill.
• Hub vortices — vortices form around the hub, so the centre of the fan does little useful work while air rolls back on itself around the hub and drive.
• Uneven plenum feed — obstructions and inlet/outlet shape distort the pressure field, so parts of the tower or fill are starved of air.
• An underused motor — a standard fan often cannot absorb its rated power even at increased pitch, leaving installed capacity that is paid for but never used.

UNIQUE Fan System — a Patented Retrofit from AFI

Synergy Services represents AFI — Axial Fans Int srl in Thailand. AFI’s patented UNIQUE fan system addresses these losses directly: it re-distributes the pressure gradient across the plenum so the same motor moves more air, and air is drawn evenly through the whole fill instead of losing airflow to the tip, hub and plenum effects above. That gain can be spent as lower energy draw, as extra airflow, or split between the two — a commissioning choice, not a fixed property of the retrofit.

AFI-Reported Performance Evidence

AFI reports the UNIQUE system delivers +10% to +20% increased efficiency, and AFI states the system was recently tested by a CTI (Cooling Technology Institute) authorized party — a statement about a test of the system, not a certification of AFI or Synergy. AFI reports the gain in two directions, both measured on the same installation: a revamp of a ME 862-2 fin-fan cooler at a refinery in Augusta, Italy.

• Power-saving setting — same airflow, less power. With UNIQUE set to hold the pre-retrofit airflow, AFI measured fan power down 4 kW (−21%), which AFI states as a €4.5K per year OPEX saving.
• Airflow-maximization setting — maximum available power, more airflow. With UNIQUE set for maximum performance, AFI measured +5.8 m³/s airflow (+13%) at the maximum available electric power — a capacity gain that comes with the power that produces it, not an energy saving.

These are AFI’s reported figures; what a specific tower can deliver is established by a field-measured baseline.

What an Assessment Can Reveal

The 70–85% rule of thumb below is a planning guide, not what every tower actually measures at. Our Kanchanaburi biofuel-site assessment is a real example of what a baseline can show: one crossflow unit came out at an estimated 48.9% of its original design capability — a generated-curve result (66.4%) multiplied by a field-test-against-that-curve result (73.6%), explicitly labelled as an engineering estimate rather than a certified figure because the original manufacturer curve wasn’t available. That is precisely the gap an upgrade scope is sized against: a tower found that far below design basis has substantially more headroom for a retrofit to recover than one running close to design.

The Business Case for Upgrading

Cooling towers more than 15–20 years old are often operating at 70–85% of their original design performance — a common industry rule of thumb, not a fixed law. Towers with strong water treatment and consistent preventive maintenance can hold much closer to design performance well past 20 years; towers with heavy fouling, chemical attack, or deferred maintenance can fall below that range much sooner. A performance test establishes where a specific tower actually sits before committing to an upgrade scope.

The energy penalty of running below design accumulates year after year. A well-engineered upgrade can:

• Reduce fan energy consumption. The low end of what we typically see (around 15%) comes from fill and airflow optimisation alone; the high end (up to 30%) comes from pairing that with a VFD retrofit, since fan power falls with the cube of speed — a modest speed reduction converts into a much larger power reduction. See Fill Replacement: High-ROI Investment for a measured example on one Synergy project.
• Lower process cooling temperatures, allowing downstream equipment to operate more efficiently
• Extend the operational life of the tower. Replacing structural components with modern FRP or concrete resets that part of the tower to a fresh multi-decade design life; the 15–25 year range we typically quote assumes the civil foundations and basin were already sound — see structural reconstruction above.
• Reduce water consumption through lower drift loss and better thermal performance

Synergy Services can carry out a feasibility assessment to quantify the expected return on investment for your specific plant.

Our Process

1. Site assessment and performance testing — establish a baseline and identify the gap between current and target performance
2. Engineering design — develop the upgrade specification, including fill selection, mechanical design, and structural review
3. Proposal and business case — present costs, expected performance improvement, and estimated payback period
4. Project execution — carry out the upgrade during a planned shutdown, coordinated with your maintenance team
5. Post-project performance verification — confirm that the upgrade has delivered the promised results

Industries We Serve

We have delivered upgrade and reconstruction projects for clients in:

• Power generation (coal, natural gas, and biomass plants)
• Petrochemical refining and chemical manufacturing
• Sugar and ethanol production
• Pulp and paper mills
• Cement and industrial minerals