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[report整理] SENEWS-2011-04-25

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[Homework]【整理】SENEWS-2011-04-25

This is the VOA special English technical report.
  Solar water heaters are used around the world and are not very difficult to do. The system we are going to describe is based on the design in Afghanistan. Since then, it has been built and used in many countries. It can heat seventy meters water to sixty degree Celsius.  It can do this between summarize at noon on a clear day with an average air temperature of 32 degree Celsius. There are two parts of the solar water was heated. One part is made of shade of metal painted black. Blank services become hotter in the summer that services painted in the other color. This blank metal plate is called a collector. The collector is placed in context with the water. There are several kinds of metal shapes that can be used for the collector. Corral gated metal will worked very well. Corral gated shapes are often used as ropes on houses. Once the water is heated, it is kept hot with an isolation material. This allows the water to stay warm for a long time.  The second part of the solar water heater holds the water of the system.  This water storage tank can be a container that holds about one hundred meters.  Two robber pipes are attached to the water storage tank. One pipe let’s water flow into the system, the other let’s water flow out. When the water heater is working correctly, water will flow from the storage tank to the collector and back again. You can use the hot water at the top of the tank washing and cleaning. You can change the flow of water so that the temperature is hot one more as design. This solar water heater is easier to build and operate. It will last about two years before the robber pipes need to be replaced.  There is also something else you will be to make the solar water heater work. The sun, as you might imagine, The heater will heat water only on sunny days. You can get more information about solar water heaters and other projects from enterprise works *. This group works internationally to fight poverty. The website is enterprise works down for. Choose the link for news and recourses then plank on publication.
   
  And that’s the VOA technology report.
                                                     
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