Summary
- Haffner Energy’s C-iB modules are intended to scale into multi-module data centre energy systems of tens of megawatts.
- The architecture couples syngas generation with electricity production and absorption chillers using recovered heat.
- Availability above 99.995% is a company design claim based on redundant modules and limited natural-gas backup, not operational data from a deployed data centre system.
Haffner Energy has launched a modular power and cooling proposition for data centres built around residual biomass, syngas production, combined-cycle generation, and absorption chillers.
The French energy technology company is pitching the system as an alternative or supplement to full reliance on grid connections in markets where large blocks of electrical capacity are difficult to secure.
Its proposed architecture is based on a new C-iB module derived from the company’s existing thermolysis and gasification technology. Multiple units can be installed together, with shared supporting equipment, allowing the plant to expand as a data centre adds computing capacity.
Haffner says installations can reach tens of megawatts and beyond. No operating hyperscale data centre using the complete new configuration has yet been identified, so the availability, efficiency, cost, and water claims attached to the proposition remain design and vendor claims rather than demonstrated fleet performance.
Heat is used to produce chilled water
The system converts residual biomass into syngas, which is then used to generate electricity. Haffner says waste heat from the generation cycle can be recovered and supplied to lithium-bromide absorption chillers, producing chilled water at around 4°C.
The company puts electrical efficiency at around 55% of the energy contained in the syngas when using the combined-cycle arrangement. It also says some water contained in the biomass can be recovered as condensate, potentially reducing the amount of external water required by the overall installation.
That configuration is technically different from the conventional approach of buying electricity from the grid and using electrically driven chillers to reject IT heat. Absorption chillers use thermal energy as a significant part of the refrigeration process, creating a route to turn otherwise wasted generation heat into a useful cooling input.
The trade-offs are equally physical. A biomass installation requires a reliable fuel supply, storage, handling systems, gasification equipment, generation plant, emissions controls, maintenance capability, and space. Those requirements are more complex than taking power from a sufficiently strong grid connection.
Feedstock availability also becomes part of data centre resilience. Haffner argues that biomass has an advantage over intermittent renewable generation because weeks of material can be stored on or near the site and sourcing can be diversified across agricultural and forestry residues.
Redundancy underpins the availability claim
For a ten-module configuration, the company proposes holding two units in redundancy. Limited natural gas would then be available during exceptional periods when the biomass modules could not provide full output.
Haffner says that arrangement is designed to exceed 99.995% energy availability and that natural gas would account for less than 0.1% of primary energy. The figure should not be confused with independent Tier certification or measured availability from an operating data centre deployment.
The modular design would allow maintenance to be staggered while other units remain online. That is important for data centre applications because generation equipment that becomes part of the primary energy chain inherits much of the uptime burden normally carried by utility networks, UPS systems, batteries, and standby generators.
Haffner does have previous data centre-related experience. It led engineering and construction of a trigeneration plant in Luxembourg supplying electricity, heat, and cooling to Kiowatt, which in turn supplies LuxConnect infrastructure. The new C-iB proposition is intended to extend that approach into larger, standardised installations.
The company is also a member of the ÆTHER consortium pursuing European AI Gigafactory opportunities, with proposed campuses in the Strasbourg region. That gives it a potential route into projects where power availability is likely to be one of the earliest site-selection constraints.
The commercial case will depend on variables that cannot be settled by the module design alone: biomass pricing and logistics, emissions permitting, site footprint, capital cost, maintenance, grid arrangements, cooling requirements, and whether operators are willing to bring primary energy production inside the data centre boundary.
Haffner’s launch provides another example of the energy system moving closer to the compute. The proposition is credible enough to warrant engineering attention, but the decisive evidence will come from a multi-megawatt installation operating against data centre availability and cost requirements rather than from design specifications.
