Workshop
Smell, fragrances and defective helmets it started with a belt. By default, this was changed after a certain mileage. To the security. Kenneth Yarrow often says this. Whether the material was faulty, the workshop is not minding. But Professor Anke Nellesen, who is annoyed about the Exchange on suspicion. Already, the idea was born, in the detection of micro-cracks which are not seen with the naked eye, to rely on other senses.
Bicycle or construction helmets are just two examples of the diverse usage of solid materials in safety technology. The protection function can be restricted but not visible cracks strongly. A process that developing researchers of the Fraunhofer Institute for environmental, safety and Energy Technology UMSICHT and mechanics of materials IWM ensures that fragrances from the inside are released at a critical crack. Scented oils that are locked in microcapsules are responsible for the smell. They allow that as soon as it smells, even lay people realize when a sufficient protection no longer is given.
His ideas related to the research project Geruchsinduziertes detect critical cracks for the public to be, experienced hosts Fraunhofer UMSICHT on 15 September the workshop very nice smell! “in Oberhausen. All those who test their sense of smell, to learn something about the sense of smell or the manufacture of perfumes, are welcome to the workshop and the award ceremony for the selected place in 2011 invited. By the site initiative”Germany land of ideas in cooperation with Deutsche Bank advertised, the competition moves 365 landmarks in the land of ideas ideas and projects focus on actively shaping the future of Germany. Target audience the guest spectrum is open. The program is suitable for students from the high school. Registration registration is possible until September 8, 2011 by letter, fax or E-Mail via the link below.The number of participants is limited. Trade fair the event is free of charge. But please you fair trade. Log You are at, if you want to participate in the workshop. Should you be unable to, you cancel in a timely manner.
04.20.25Fog Systems
The quality of water is critical to a well-functioning fog system and determines its durability and maintenance. These include also health aspects, because the presence of micro-organisms in the water spray can lead to illnesses. A fog nozzle under high pressure (60-120 bar) water sprays, has a hole diameter of approx. on. 120 microns depending on the model. This is so small that it is only under the microscope. With a consumption of 7 litres of water per hour and a pressure of 60 bar, the flow velocity at the exit site is about 600 kilometers per hour.
This is the velocity of high friction forces acting on the nozzle. The harder the water, the more is the nozzle use off. The nozzle hole widens increasingly, which eventually leads to a higher consumption of water and degrades the quality of the fog. A high lime content is detrimental to not only the jets, but also the entire pipeline system. Lime, bacteria can accumulate. That’s why I recommend the water off medium hardness with an ion exchanger, or even better with a reverse osmosis to treat. The other parameters that are relevant for mist systems include total salinity, conductivity, pH, presence of certain substances such as iron, suspended solids, which affect the turbidity and microorganisms. The pH affects the failures of certain substances such as z.
E.g. lime. This is particularly the case with pH values of more than 7, so in the alkaline range. This leads to a premature erosion of the nozzle hole. In mountainous or hilly regions tap water has very often a higher degree of hardness, which is located at pH values of approximately 8 to 9. Therefore, optimum conditions can be achieved only with an additional pH correction.This is not entirely unproblematic, because the pH correction only materials suitable for, that safe are health, such as citric acid.
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