IsoMat Trials: Kent Rail’s Thermal Management Solution

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Introduction

South Eastern Railway is deploying a new thermal management technology on the Tonbridge to Hastings line in Kent to improve service reliability during hot weather. The operator is trialing the IsoMat system, designed to prevent overheating in railway signalling cabinets.

Main Content

Technology Deployment

South Eastern Railway has partnered with a UK start-up to trial the firm’s patented IsoMat system on the Tonbridge to Hastings line. The technology aims to prevent overheating in railway signalling cabinets, where internal temperatures can exceed 70°C. Following a successful pilot, IsoMat units will be deployed across ten of the Kent Route’s highest-risk cabinet locations this summer, with wider installation planned for 2026.

IsoMat Technology

The IsoMat technology is a passive heat exchanger that requires no power, maintenance, or cabinet modifications and can be installed in under an hour. The system transfers thermal energy thousands of times more efficiently than copper or aluminium alone. During trials, the technology reduced peak internal cabinet temperatures by more than 21% on the hottest days.

Company Statements

David Davidson, Chief Operating Officer of South Eastern Railway, stated that the IsoMat technology provides a simple, effective solution to a complex problem, helping to maintain service reliability during heatwaves. The Chief Executive of the start-up added that the IsoMat demonstrates how innovative engineering can address climate resilience challenges while delivering significant operational benefits.

Network Rail Involvement

The trial is being conducted with Network Rail’s Technical Authority and procurement teams. Any large-scale deployment will follow Network Rail’s competitive procurement process. By preventing overheating, IsoMat could reduce failures, cut maintenance costs, and ensure smoother journeys for passengers and freight.

Commercial Production and Applications

The company is beginning commercial production of IsoMat this year. Beyond rail, the company sees applications in industries such as construction, refrigeration, and electrification, where effective temperature management is increasingly critical.

Conclusion

South Eastern Railway is implementing the IsoMat system to address overheating in railway signalling cabinets. The technology has shown promising results in trials and will be deployed across the Kent Route, with wider installation planned for 2026. The system is a passive heat exchanger, and the trial is being conducted with Network Rail.

Company Summary

South Eastern Railway: The operator of the Tonbridge to Hastings line in Kent.

Network Rail: Manages a large network of track and thousands of signalling assets across the UK.

Technology

IsoMat: A passive heat exchanger designed to prevent overheating in railway signalling cabinets.

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