Vulcanisation and the grid: Why tyre plants need a thermal buffer

The thermal reality of vulcanisation

To execute this transition while protecting operational margins, one must look closely at the factory floor and the physical realities of continuous steam demand.

While steam is utilized across various industries, tyre manufacturing has specific and unforgiving requirements. The core bottleneck in production is the vulcanisation process. Here, the "green tyre" – consisting of up to 20 different raw material layers – is placed into a curing press, where it is subjected to high pressure and high-temperature steam (typically ranging from 190°C to 210°C) to achieve its final shape and durability.

Without highly stable, continuous steam, vulcanisation stops, meaning: no tyres.

Historically, natural gas boilers have handled this baseload perfectly. But as gas and carbon costs rise, plants are exploring direct electrification. This is where most facilities run into a major infrastructural roadblock.

The grid capacity trap

Direct electric boilers (e-boilers) are often viewed as the logical first step toward decarbonisation.

However, they present a significant operational challenge: an e-boiler requires electricity at the exact moment the plant needs steam. To run continuous operations, the e-boiler demands a massive, unyielding 24/7 grid connection.

Given that electrifying a tyre plant's high steam demand can require anywhere from 10 to 40 MW of total grid capacity, this continuous pull creates a critical capacity bottleneck.

In reality, most local Distribution System Operators (DSOs) cannot guarantee this level of continuous, round-the-clock capacity.

To make matters worse, buying power directly from the grid during peak daylight hours destroys the financial viability of electrified heat, making it vastly more expensive than the natural gas it is supposed to replace.

Thermal storage as the grid buffer

To make electrification both physically possible and commercially viable, the tyre industry requires a buffer.

Implementing thermal energy storage (TES) fundamentally changes the plant's relationship with the local grid. Instead of demanding a 24/7 power supply, a thermal battery can accept a conditional grid connection. The system acts as a sponge, drawing power from the grid during the 6 to 8 hours a day when electricity is abundant and cheap (off-peak hours). The energy is stored in molten salt – a highly mature storage medium – and then discharged as continuous, 24/7 steam.

Best of all, this integration requires no massive internal retrofits to the factory floor.

The solution is essentially plug-and-play: it simply requires physical space on the lot and an electrical connection, feeding directly into the plant's existing steam headers. This decoupling of power consumption from steam generation allows tyre plants to bypass severe grid bottlenecks, utilizing available network capacity without exposing their OPEX to peak power prices.

Ultimately, decarbonising tyre production is not about finding a heat source that can blindly match a gas boiler.

It is about finding a solution that can handle the reality of the power grid, providing the absolute security of supply required to keep the vulcanisation presses running.

Because behind every reliable tyre on the road – ensuring that millions of Europeans can keep moving safely and freely every single day – lies the continuous, high-pressure steam that made it possible.

Ready to solve the grid bottleneck at your facility? 

Reach out to our commercial lead for the tyre industry, Elena Davydova, to discuss a pragmatic decarbonisation roadmap for your plant: Book a meeting.