Industrial Usefulness and Technology Selection in Process Intensification: Energy-Normalized Metrics for Hydrodynamic Cavitation

Technical summary

Strong laboratory activity does not by itself establish industrial usefulness. A process-intensification option must be evaluated on a complete and consistent process boundary that includes useful output, energy demand, chemicals, pressure loss, separation requirements, fouling, maintenance, product quality, reliability and uncertainty.

The paper presents a regime-based decision architecture centred on the Industrial Usefulness Window. Within the framework, this is a decision construct representing the operating domain in which a specifically defined technology concept, equipment configuration and operating regime show a positive net process benefit relative to an appropriate reference case after measurable penalties and uncertainty are included. It is not proposed as a universal device-performance correlation.

Dimensional engineering indicators are separated from normalized decision indices. Energy-normalized performance measures and a Technology Net Benefit Index are introduced as framework-level comparison tools. Their numerical values are meaningful only when the system boundary, reference case, normalization basis, penalties and uncertainty treatment are defined consistently. Higher conversion, faster removal, stronger mixing or more visible physical activity are therefore not treated as sufficient evidence of system-level improvement.

Hydrodynamic cavitation is used as the principal case technology because different device classes and geometries can produce materially different hydrodynamics and process effects. The analysis therefore requires a clearly defined concept, geometry class, operating regime and system boundary matched to the governing process bottleneck, followed where necessary by controlled evaluation of materials, operating conditions and integration strategy. Device labels alone are not treated as transferable evidence of performance.

Hydrodynamic cavitation is potentially justified when it improves a material limiting step such as micromixing, interfacial mass transfer, dispersion, oxidant contact, controlled disruption or pretreatment and when the resulting benefit remains positive after system penalties are included. Its usefulness is correspondingly limited where the dominant constraint is equilibrium, refractory chemistry, unavoidable downstream separation, product instability, material damage, poor operability or another bottleneck that the cavitation step does not address.

The central engineering conclusion is that hydrodynamic cavitation should be evaluated as an integrated reaction–transport–separation intensification module rather than adopted as a generic stand-alone treatment or conversion technology.

Scope and evidence boundary

The framework supports early-stage technology screening, bottleneck-oriented concept selection, comparison with a reference process, definition of energy- and system-normalized metrics, identification of operating windows and planning of representative validation programmes.

It does not replace device-specific hydrodynamic characterization, validated CFD, measured cavitation behaviour, reaction and mass-transfer data, material-durability testing, process-safety analysis, separation evaluation, techno-economic assessment or long-duration pilot operation.

Equal device labels or equal cavitation-number values do not establish equivalent performance. Geometry, flow field, collapse location, residence pattern, wall interaction, feed properties, temperature, gas content and integration with the surrounding process must be evaluated explicitly.

The framework is intentionally generic and non-confidential. It does not disclose, reconstruct or imply performance for any proprietary hydrodynamic-cavitation device, employer technology, client system or protected geometry. Application to a specific commercial or confidential technology requires rights-cleared, system-specific evidence and an independently defined validation basis.

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The deposited paper identifies the work as available under the Creative Commons Attribution 4.0 International licence .

Recommended citation

Saylam, A. (2026). Industrial Usefulness and Technology Selection in Process Intensification: Energy-Normalized Metrics for Hydrodynamic Cavitation. Zenodo. https://doi.org/10.5281/zenodo.20593905

Metric interpretation boundary

Energy-normalized indicators, the Industrial Usefulness Window and the Technology Net Benefit Index are decision-support constructs. They require an explicitly defined functional output, process boundary, reference case, normalization basis and uncertainty treatment. They should not be compared across studies or devices unless those definitions are technically compatible.

A positive screening result identifies a case that may justify further validation; it does not by itself establish scale-up readiness, commercial superiority, device lifetime, economic viability or regulatory suitability.

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• Reaction–Transport Regime Analysis for Desulfurization of Gas and Petroleum Streams
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