Case Studies
TES in practice: evidence from the field.
These case studies document where TES and Mexel®432 have been applied, what was measured and what results were observed. They are written to give station engineers and decision-makers a clear, honest picture of what TES can deliver — and what it cannot.
Each case study follows a consistent structure: baseline conditions, intervention approach, observed results and lessons learned. Where independent verification was conducted, we include the referee's conclusions.
What you'll find in these case studies
Baseline data
Pre-treatment performance metrics including TR, TTD, condenser vacuum, and where available, heat-rate data.
Treatment protocol
Dosing rates, chemistry parameters, and integration with existing water-treatment programs.
Measured results
Changes in key performance indicators during treatment period compared to baseline.
Lessons learned
Operational insights, challenges encountered, and recommendations for future deployments.
South Africa
Eskom power stations
TES has focused its initial deployments at South African coal-fired power stations where cooling-water challenges are acute. These sites face variable raw-water quality, high solids loading, biofouling and corrosion, making them relevant environments for structured technical evaluation of the TES approach.
Eskom • Wet-cooled coal
Tutuka Power Station
Tutuka is referenced as evidence that Eskom had a structured technical pathway for baseline, intervention and review. It should not be read as an approved rollout or completed performance case study.
Status: protocol and procurement history only
Why Eskom stations?
Complex water chemistry
Eskom stations face challenging raw-water quality with high TDS, variable pH and seasonal biofouling, making them suitable for disciplined, site-specific evaluation.
Established protocols
Heat rate performance is measured using ASME PTC 12.2 (TTD/TR methodology), providing a rigorous, transparent framework for baseline → intervention → review assessment.
Independent verification
Water Research Commission (WRC) can act as independent referee, ensuring credible, unbiased evaluation of results.
International
International reference library
Mexel®432 has been used in multiple industrial cooling-water contexts outside Southern Africa. We keep public claims on this site limited to broad application areas unless a site report is cleared for sharing.
Power generation
Condenser and cooling-system references are available for qualified engineering review where disclosure permits.
Typical review material: operating context, dosing approach, and available thermal-performance indicators.
Refining and petrochemical
Recirculating cooling-water and process heat-exchanger references can be discussed under an appropriate technical-review process.
Public summaries avoid health, shutdown-reduction, or cost-saving claims unless supported by a cleared site document.
Seawater and desalination
Seawater applications are handled through local environmental approvals, discharge limits and site-specific operating records.
Relevant documents are shared only when they match the client's use case and disclosure requirements.
About international references
TES can discuss international Mexel®432 application history during qualified technical enquiries. Public summaries are intentionally conservative until supporting documents are cleared for release.
The Southern Africa TES approach remains based on site scoping, traceable dosing, and baseline-to-review verification rather than generic global performance claims.
Want more detail on these case studies?
We can share available documentation where disclosure allows. For Eskom stations, we can discuss verification protocol documentation and how a structured baseline-to-review approach could apply to your site.
Technical site reports and performance summaries
Baseline vs. intervention data comparisons
Industry-specific application guidance