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. This window represents the operating domain in which a specifically defined technology concept, equipment configuration and operating regime maintain a positive process benefit relative to an appropriate reference case after measurable penalties and uncertainty are included.

Dimensional engineering indicators are separated from normalized decision indices. Energy-normalized performance measures and a Technology Net Benefit Index are used to compare alternatives without treating higher conversion, faster removal, stronger mixing or more visible physical activity as sufficient evidence of system-level improvement.

Hydrodynamic cavitation is used as the principal case technology because Venturi, orifice, nozzle, vortex, shaped-flow-element and rotary concepts can produce materially different hydrodynamics and process effects. The analysis therefore requires selection of the specific concept and design that match the governing process bottleneck, followed where necessary by controlled adaptation of geometry, materials, operating conditions and integration strategy.

Hydrodynamic cavitation is most defensible when it improves a limiting step such as micromixing, interfacial mass transfer, dispersion, oxidant contact, controlled disruption or pretreatment. It is less defensible where the dominant limitation is equilibrium, refractory chemistry, unavoidable downstream separation, product instability, material damage or poor operability.

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.

Full text

The deposited technical preprint and associated files are available through the canonical Zenodo record: access the Zenodo record and files .

License

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

Related technical resources

The reaction–transport desulfurization framework applies related bottleneck-oriented and system-boundary principles to gas- and petroleum-stream sulfur removal:

• Reaction–Transport Regime Analysis for Desulfurization of Gas and Petroleum Streams
• Open engineering repository
• Unified Kinetic–Process Framework for Advanced Oxidation Processes