A new way to vapourise

Vapore’s Capillary Force Vapouriser is a compact, heat-powered device that generates a powerful jet of pressurised vapour from un-pressurised liquid – with no moving parts.

Controlled vapourisation of liquids is central to a huge array of products and processes, from air fresheners to microchip manufacturing to jet engines.

Now, engineers and product designers have a new way to accomplish this fundamental function using Vapore’s Capillary Force Vapouriser (CFV) – a compact, heat-powered device that generates a powerful jet of pressurised vapour from un-pressurised liquid – with no moving parts.

Vapore’s CFV combines two basic natural phenomena – capillary force and phase transition – into a single component that produces a controllable flow of vapour.

Traditional methods of vapour generation are as diverse as the applications they embrace, but most involve atomisation, or the creation of tiny droplets, which in turn evaporate to become vapour or gas. In contrast, the CFV eliminates most of the mechanism.

The CFV itself consists of multiple porous layers bound by a peripheral glaze. A top element, the orifice disc, is solid with an integral orifice and downward projecting ridges that makes contact with a second element, a vapour generator, whose minute pores induce high capillary pressure. A third element, the insulator, consists of a larger-pored material that wicks liquid upward while resisting heat flow downward.

Heat applied to the top of the orifice disc conducts onto the vapour generator, where the expanding gas becomes pressurised. Because the layered construction prevents the gas from expanding downward, the only way out is through the orifice, where vapour escapes as a high-velocity jet. This ejected gas is replaced by a cooling flow of liquid, wicking into the insulator. The result is a dynamic equilibrium of heat flux, liquid flow, gas pressure and evolved gas.

When used with consumer products like fragrances or insect repellant, a CFV can disperse active ingredients directly, eliminating the need for propellants, fillers and disposable aerosol cans. When used with liquid fuels, the vapour produced by a CFV burns more like natural gas, enabling simpler designs and the potential for significant emissions reductions.

Evaluation kits are currently available for application engineers and designers to integrate Vapore’s CFV component into prototypes. The evaluation kit enables the user to activate the CFV with a small electric heater while monitoring crucial performance parameters of power (heat), temperature and flow rate. Components include a sensitive flow meter, power supply, software and a microcomputer.

Backed by six US patent grants and innumerable US and foreign patent filings, CFVs are currently being manufactured and integrated into prototype designs at Vapore’s San Francisco Bay Area facilities.

The first commercial application using Vapore’s technology is scheduled for release this summer.

More details on the technology are available <link>here=http://www.vapore.com/tech_howto.htm</link>.

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