About Smoke
Artificial smoke is produced by heating a smoke fluid chemical above its boiling point within a heat exchanger. The fluid is then vaporised, and it is when the vapour exits the heat exchanger and mixes with the relatively colder atmosphere that rapid condensation of the vapour takes place, resulting in a visible smoke (or technically fog).
It is important that the vaporisation of the fluid within the heat exchanger is complete, otherwise the production of a 'wet' smoke, or a smoke with a very large particle size will result.
Conversely, it is important that the heat exchanger through which the smoke fluid is passed is not operating at too high a temperature, otherwise unpleasant and potentially hazardous pyrolysis products will be formed.
Depending on the type of smoke fluid being vaporised it may be necessary to use an inert propellant gas as a “carrier” for the fluid as it is heated within the heat exchanger.
Concept's machined range of heat exchangers produce a smoke or fog effect with a particle size an order of magnitude less than conventional smoke systems, giving significant benefits in terms of smoke concentrations required to achieve obscuration targets, health and safety, flammability and settling velocities of the resulting fog.
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BA Facility, Surrey Fire & Rescue Service
Observations on Concept ViCount smoke system:
"Reliability - we have three ViCount generators, two of which are at least ten years old. These are extremely reliable as is the new one, we rarely have problems with them.
Smoke & running costs - very good quality of smoke at all times providing excellent conditions within the fire house as required.
Running costs - the amount of training provided from one drum of smoke oil is very good. Due to the quality of smoke provided, the generators do not need to be on as long now as we have three.
Sales/support - always very good. Whenever we have required assistance or advice, there has always been somebody available to help. When we had a problem with a blocked filter, we simply made one phone call and this was dealt with quickly and efficiently."