Supercapacitors applications , environmental issues and safety Essay

Supercapacitors applications , environmental issues and safety - Essay Example It is also ecofriendly as opposed to the two. Super capacitors are therefore increasingly becoming more probable solutions over both of them in some occasions INTRODUCTION The demand for environmentally friendly energy is ever growing in this globe of rapidly advancing technology. This is mostly so in the developed nations and more so in the scientific frontier. This has led to the technology of capacitors being refined with the aim of storing more energy in devices so that the lesser environmentally friendly storage products like batteries are facing out. This progress has led to the birth of major adorable devices. Electric double layer capacitor, better known as a super capacitor, is one such device. Super capacitors are also by many other names for instance ultra-capacitors and electric double layer capacitors. Super capacitors are capacitors with high capacitance of greater value compared to the capacitors currently available in the market. It exhibits values of up to close to 4 00 F in a standard size of a single capacitor. This is achieved through utilization of high surface area electrode materials coupled alongside very thin electrolytic dielectrics. Its first appearance is dated back to close to 2004. Its first application was in 2005 where it was first used in robots and later in Airbuses. Its technology registered within this period was so rapid that is application and market grew so fast. This paper reviews the applications of super capacitors and environmental impact of super capacitors. Super capacitors and the environment Toxicity Super capacitors have no heavy metals in its composing components. This is a big relief when is compared to the batteries which also serve the same purpose as this type of capacitor. Lead batteries have metals like lead making their exposure to the environment hazardous given the toxicity of lead. Some super capacitors use a liquid salt to act as its electrolyte. This liquid is environmentally friendly. On top of that, they have the capability to use electrolytes in the blood further displaying their capability of using common place materials that have totally no harm on the environment. It is approximated that most super capacitors use coconut shells as powdered activated carbon. This is a very environmentally friendly activated carbon with no environmental threat at all. Even when heated or exploded, the emissions are harmless as they majorly contain water contained in the electrolyte. Recycle ability By virtue of being rechargeable, the super capacitors reduces the amount of waste being churned out to the environment however biodegradable. This in turn reduces the environmental pollution. During its entire lifetime of charging and recharging there are no wastes discharged to the environment. Safety The talk of safety is never complete without the consideration of the risks of a product to the user. Even when overcharged, the super capacitor does not explode as the conventional capacitor or batt ery would. This ensures that the users and handlers of any gadget remain safe even if they forgot to stop its charging in recommended time. Applications By virtue of its numerous advantages, super capacitors are fast gaining popularity in the design of electronic gadgets. The table below contains most of its applications and the role super capacitors play in those gadgets. APPLICATION FUNCTION Mobile phones Real-time Back up Personal

Character evaluation Essay Example | Topics and Well Written Essays - 500 words - 1

Character evaluation - Essay Example It is concluded that Sara as a film character is well-developed and not one-dimensional like other film heros and villains are.    The main theme of the film, faith, is embodied by the character of Sara Crewe. Growing up  to a rich family in India, Sara believes that all girls are princesses. As a young girl, she was encouraged by her father to believe in such things as magic. As a result, Sara became more in touch with the fantasy world than in the banal realities of life. She enjoys reliving and retelling the story of Ramayana, takes pleasure in reading books and playing with expensive dolls, and most importantly, appreciates a world of make-believe that is driven by fantasy. Her being open to the arts, emotions, unconventional ideas, and adventure is what brings life to the movie. Saras open nature has influenced the way she was perceived and treated by the schools headmistress, Miss Minchin, the students, and the servant girl, Becky. During her fist week at school, Sara became an instant favorite among the students because of her ability to tell the story of Ramayana in such a creative and  engaging manner. By imagining that she could talk to her dead mother in heaven, Sara was able to remove the tantrums of Lottie who also lost her mother as a young child. In one of the most  memorable scenes  in the film, a flower vendor offers Sara a bright yellow flower and utters the phrase "For the princess." Sara received the flower with a smile and then, like a princess, took a bow. A turning point in the film, this scene established that all girls are, indeed, princesses regardless of their social and economic status. Saras being open led her to acknowledge and believe what her father has been telling her all along, and which was re-affirmed by the flower vend or.    Sara also acted with a sense of duty, self-discipline, and achievement. Because Sara knew the French language by heart, she felt it was her duty to teach the other students on her free time.