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Innovative Fuel Technology for Shipping and Industry - Inline directly in the System
Emulsified and homogenized fuels - stable, low-emission, industry-compatible
With its cavitation-based fuel technology - the CaviFlow® inline modules - RAPTECH provides an innovative solution for blending and homogenizing low-emission fuels. The technology is designed for alternative marine fuels, refineries and industrial plants.
The analysis of a blend of HFO and biodiesel using CaviFlow® cavitation technology showed clear potential for optimization:
CaviFlow® is a hydrodynamic cavitation module for continuous homogenization, emulsification and stabilization of liquids in industrial blending processes. The fuel technology is integrated directly into pipes, making it particularly suitable for high throughputs and viscous media. In contrast to agitators or tank mixers, homogenization with CaviFlow® takes place completely inline, without additional process steps or dwell times. Compared to ultrasonic homogenizers, CaviFlow® works without external sources and is therefore scalable, low-maintenance and suitable for high industrial throughputs. More detailed information on fuel technology can be found here.
Application of the fuel technology:
The analysis of a blend of HFO and biodiesel using CaviFlow® cavitation technology showed clear potential for optimization:
- Improvement in viscosity by 13.3 % at 50 °C
- Reduction in fuel consumption by around 4%
- Approximately 1.2 tons of fuel savings for 55,000 DWT MR tankers
CaviFlow® is a hydrodynamic cavitation module for continuous homogenization, emulsification and stabilization of liquids in industrial blending processes. The fuel technology is integrated directly into pipes, making it particularly suitable for high throughputs and viscous media. In contrast to agitators or tank mixers, homogenization with CaviFlow® takes place completely inline, without additional process steps or dwell times. Compared to ultrasonic homogenizers, CaviFlow® works without external sources and is therefore scalable, low-maintenance and suitable for high industrial throughputs. More detailed information on fuel technology can be found here.
Application of the fuel technology:
- Efficient blending and homogenization of conventional, bio- and pyrolysis-based fuels
- Fuel treatment processes including desalination, desulphurization and feedstock conversion
- Reduction of sludge formation in fuel systems
- Improved effectiveness of fuel additives and improved combustion performance
Advantages of CaviFlow® inline fuel technology
CaviFlow® inline module
Efficient emulsification and homogenization with RAPTECH fuel technology
The CaviFlow® Kraftstofftechnologie wurde gezielt für eine energieoptimierte Aufbereitung vor Kraftstoffen konzipiert. Als kompakte Plug-&-Play Lösungen ermöglichen die Module die einfache Nachrüstung in bestehende Kraftstoffsysteme und eignen sich gleichermaßen für fossile wie auch biogene Kraftstoffemulsionen.
Durch den Einsatz standardisierter Flansch- oder Gewindeanschlüsse lassen sich die CaviFlow® modules can be integrated directly into existing systems. They are ready for immediate use and easy to maintain. Find more detailed information on fuel technology here.
- Technologie: Hydrodynamische Kavitation
- Betriebsart: Kontinuierlich (inline)
- Material: Stahl oder Edelstahl
- Einbau: Rohrleitung mit Flansch- oder Gewindeanschluss
- Durchflussmenge: 6 m3/h, 25 m3/h, 50 m3/h, 100 m3/h
- Medien: Flüssigkeiten, Mehrphasensysteme, Emulsionen
Durch den Einsatz standardisierter Flansch- oder Gewindeanschlüsse lassen sich die CaviFlow® modules can be integrated directly into existing systems. They are ready for immediate use and easy to maintain. Find more detailed information on fuel technology here.
Do you have any questions about our innovative fuel technology?
Our RAPTECH engineers are at your side with sound advice - competent and practice-oriented. We support you with all questions regarding the use of our CaviFlow® modules.
How does RAPTECH's CaviFlow® fuel technology work?
- In the CaviFlow® inline module, the fluid is guided through a specially developed geometry. This generates hydrodynamic cavitation. These are high-energy microflows that finely distribute and stabilize particles, droplets or phases. The result is reduced droplet and particle sizes, an even distribution of the components and improved stability of the blend.
With CaviFlow® , homogenization takes place directly in the running process and requires neither separate mixing stages nor additional dwell times, as is usual with classic stirring or tank solutions. Unlike conventional ultrasonic homogenizers, the technology does not require oscillating elements or mechanically moving components. As a result, the system is easily scalable and is characterized by low maintenance requirements.
RAPTECH cavitation technology is ideal for :
- Emulsions with heavy fuel oil (HFO)
- Combinations of HSFO, VLFO and ULSFO
- Biodiesel as a renewable energy source
- Bioethanol for industrial use
- Pyrolysis oil from recycled plastics
- Hydrogenated vegetable oil (HVO)
- Glycerine-based fuel solutions
- Water-in-fuel emulsion systems
- Qualitative upgrading of heavy fuels
- Cavitation-based fuel reforming
- Optimization of atomization properties
- Demand-oriented use of additives
Conformity with ISO 8217:2014
(Specification for bunker fuels)
(Specification for bunker fuels)
Technology and innovation advantages
Technical data CaviFlow® inline modules
| CaviFlow ® 6 | CaviFlow ® 25 | CaviFlow ® 50 | CaviFlow ® 100 | ||
|---|---|---|---|---|---|
| Flow rate | up to 6 m³/h | up to 25 m ³/h | up to 50 m³/h | up to 100 m³/h | |
| Form | max. 10 bar | max. 10 bar | max. 10 bar | max. 10 bar | |
| Pressure difference | 2-7 bar | 2-7 bar | 2-7 bar | 2-7 bar | |
| Density of processed liquid | up to 1,300 kg/m³ | up to 1,300 kg/m³ | up to 1,300 kg/m³ | up to 1,300 kg/m³ | |
| Viscosity of processed liquid at 50 °C | up to 500 cSt | up to 500 cSt | up to 500 cSt | up to 500 cSt | |
| Material | Black steel, stainless steel | Black steel, stainless steel | Black steel, stainless steel | Black steel, stainless steel | |
| Working temperature | according to the data sheet of the liquid media | according to the data sheet of the liquid media | according to the data sheet of the liquid media | according to the data sheet of the liquid media | |
| Risk of explosion | no | no | no | no | |
| Connection | DN 40 flange or 2 "thread | DN 50 flange or 2 "thread | DN 80 flange or 3" thread | DN 80 flange or 3" thread | |
| Weight black steel | 17,5 kg | 24,0 kg | 44,0 kg | 48,0 kg | |
| Stainless steel weight | 17.8 kg | 24,2 kg | 44,5 kg | 48,5 kg | |
| Dimensions H/W/D (with flange) | 216x188x188 mm | 272x225x225 mm | 410x250x250 mm | 410x275x275 mm | |
| Dimensions H/W/D (with thread) | 272x200x200 mm | 272x200x200 mm | 410x250x250 mm | 410x275x275 mm | |
Results and data
Cavitation-based fuel technology
The RAPTECH (Bunker) Future Fuels were successfully tested and validated using cavitation-based processes on the company's own UADA pilot plant, the only one of its kind in Europe. The fuel emulsions produced meet the requirements of ISO 8217:2014.
Significant performance improvements were observed when testing an HFO biodiesel blend using CaviFlow® cavitation technology. The viscosity of the fuel at 50 °C improved by 13.3 %, while at the same time a reduction in fuel consumption of around 4 % was achieved. For an MR tanker with around 55,000 DWT, this corresponds to a saving of approximately 1.2 tons of fuel per day.
Further technical insights can be found in our blog.
Significant performance improvements were observed when testing an HFO biodiesel blend using CaviFlow® cavitation technology. The viscosity of the fuel at 50 °C improved by 13.3 %, while at the same time a reduction in fuel consumption of around 4 % was achieved. For an MR tanker with around 55,000 DWT, this corresponds to a saving of approximately 1.2 tons of fuel per day.
Further technical insights can be found in our blog.
| Properties & test methods | HFO 380 | HFO biodiesel |
| Calorific value ( DIN 51900:2023) | 40.598 MJ/kg | 42.396 MJ/kg |
| Density at 15 °C (calculated) | 989.6 kg/m³ | 969.7 kg/m³ |
| Kinematic viscosity at 40 °C (DIN EN ISO 3104:2024) | 600 mm²/s (calculated) | 151.3 mm²/s |
| Sulphur (DIN EN ISO 14596:2007) | 1,78% | 1,35% |
| Flash point (DIN EN ISO 2719:2027) | 122 °C | 160 °C |
| Total residue (ISO 10307-1:2009) | <0.07% | 0,01% |
| Pourpoint (DIN EN ISO 3016:2019) | 0°C | -21°C |
| Parameter | HFO 380 | HFO biodiesel |
| Preheating temperature | 90 °C | 0 °C |
| Parameter | Conventional HFO | VVLSFO | RAPTECH fuel emulsions |
| ISO 8217:2024 Conformity | Yes | Yes |
| Water risk | None | Negligible (≤1%) |
| Greenhouse gas reduction | None | 20-25% |
| Raw material costs | High | Kidney (glycerine/PPO) |
| Engine modifications | None | None |
Converting to the innovative CaviFlow® fuel technology?
CaviFlow® is an inline hydrodynamic cavitation module for continuous homogenization and emulsification of liquids in industrial blending processes, developed by RAPTECH GmbH.
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