EXP[2016]SPR045° ENERGY CONTROL IN ELECTRO-SPRAY, ELECTRO-DISTILLATION AND ELECTRIC WIND APPLICATIONS, AN INNOVATION RESUME. Rein A. Roos* and Jan Marijnissen** Summary: Innovation is often confused with invention, Broos, 2016. [1] Innovation is in fact standing on the shoulders and using bright ideas of our ancestors. This is done here for 17 th century electrical phenomena like electro spray and electric wind by bringing them back into service through harnessing the problems encountered when operating in modern hazardous environments. Correspondence *Rein André Roos, Re(c)entre, 6 La Pichotière, 61340 Perche en Nocé, France. Email: rein.andre.roos@gmail.com ** Jan Marijnissen, Aerosolconsultancy, Zaart 11, 4819ED Breda, The Netherlands, jan.marijnissen@aerosolconsultancy.nl °Related to article ([EXP-A 2016]) ELECTROSTATIC APPLICATIONS Theuse of electrospray, powered by a high voltage source, also called by some electro hydrodynamic atomization, electric or corona wind and electrodistillation are gaining popularity in water treatment, air pollution control, printing, agriculture, medicine, mining etc. HAZARDOUS ENVIRONMENT In hazardous environments, by using electrospray or other electrostatic applications needing the presence of a high voltage can be a problem especially when used under explosive circumstances. In that case it is often a needed to make the unit “Intrinsically Safe”. Intrinsically Safe means a design intention of limiting the available electrical energy to such a level that sparks cannot occur from either short circuit or other failueres able to ignite an explosive atmosphere. Such circuits uses often a temperature sensor located within the explosive area, which is protected by a safety barrier made up of a series of (zener) diodes, resistors and fuses. These are arranged and dimensioned in such a way that the energy supplied to the device remains limited. A similar approach is needed for electrostatic high voltage related applications, however the construction of a safety barrier as is typical for intrinsically safe devices is difficult to realize from the point of view of the very small currents and the relatively high voltages involved. LIMITATION OF HV ENERGY So the energy supplied to the device using electrostatic applications, has to be controlled in another way. Such a method has already been used in case of an electrospray application by Stachewicz, 2010. [2] It is done by using single event electrospraying (SEE) This SEE is a method for on-demand deposition of picoliters volumes of liquids, by using a stable pulsed cone-jet mode. The pulse is produced by a special pulse generator coupled to a supply acting as source for a bias voltage. The whole supply section can be designed to be Intrinsically Safe. SPARK ONSET DETECTION Another approach is to look at the onset of the spark. This happens when the Townsend multiplication current increases in a discharge gap configuration like that of the point plane or wire plane in such way that it enters the visible light and UV radiating corona region. Interesting is the UVC emission, which is considered to be non existent in the Earth atmosphere at sea level. However measurements carried out by Roos, 1996 [3] shows that modern halogen lamps, even the one at your bedside, are also able to produce radiations in this wave length. So if one would detect the onset of a spark by means of UVC radiation one has to be sure that no intervention is produced through the © 2016 J.ofElectrostaticReorientationVol. 1, N° 1, section EPL-01, Page 1