As we are supposed to write a summary of about 300 words from article of around 1000 words, I think the one I have done previously is far more too short, so here I do it again using the article from 14 grand challenges. Anyway, I'm not deleting the previous one as I think for those who are interested in fusion energy, the previous article is the latest news for fusion energy development as ITER has already succeeded in magnetic confinement test on 11 September.
Provide energy from fusion
Fusion is the power source of the sun. In the sun, energy is released when heavier nuclei are formed through compression by gigantic heat and gravitational pressure. However, such pressure cannot be achieved by the Earthbound reactors, therefore, a temperature higher than the sun’s shall be generated to make up for this pressure deficiency. In this reaction, a small amount of mass is transformed into an enormous sum of energy as quantified by Einstein’s equation, E=mc². The supply for fusion, deuterium and tritium, is abundant on Earth; nevertheless, engineering community is facing the challenge of producing fusion energy to a commercial proportion in an efficient, economical, and environmental friendly way. A joint research project, called International Thermonuclear Experimental Reactor (ITER), is designed to achieve a power level of 500 megawatts, being the first fusion experiment to produce long pulse of energy on a significant scale. In ITER, magnetic confinement method is used in a device known as tokamak, where the fuels are injected into and confined in a vacuum chamber and heated to a temperature exceeding 100 million degrees. Under these conditions, the fusion fuels become a vapor form of electrically charge matter known as plasma. ITER will test the ability of confinement and to sustain the plasma under such conditions for fusion to take place. Yet, there are some barriers to making fusion reactors work. Among them are the need of a material that can hold the assaults from the products of the reaction, Helium and neutrons; materials that can extract heat efficiently while surviving the neutron-induced structural weakening for a long period; and lastly materials that can confine the radioactive products produced in the reactor. Generally, fusion energy produces no risk. Fusion’s success as energy provider is crucial as fusion fuels are abundant and they cause less environmental problems.
Source:
National Academy of Engineering. Grand Challenges for Engineering.
http://www.engineeringchallenges.org/cms/8996/9079.aspx
2 comments:
Friends, there are some sentences that I find it difficult to change the sentence structure, please give comments and help me correct them. Thanks.^^
I found that you taken a few sentences directly from the article and only changed a few vocabulary. I think you should list down the main points of the article before summarising rather than writing the summary while reading it. I was thinking if it will be better to just mention what is magnetic confinement method rather than explaining the whole process. With this, you do not have to explain the methods in your own words while keeping the summary short and simple. When i read through the article i find the information difficult to understand. Overall, it is a good attempt to summarize all the technical infromation. The article on the webpage is really a long one and quite hard to understand without much concentration payed. Somehow your summary makes me understand better.=)
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