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[report整理] SENEWS-2011-04-25

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[Homework]SENEWS-2011-04-25

It is the voa special english technology report.

Solar water heaters are used around the world and are not very difficult to build. The system will going to describe is base on the design develop some years ago in Afganistan. Since then, it has been built and used in many countries. It can heat 70 liters of the water to 60 degrees celsius. It can do this between sunrise and noon on a clear day with an average air temperature of 32 degrees celsius.

There are two parts of solar water heater, one part is made of a sheet of metal painted black. Black surface become hotter in the sun than surface painted in the other color. This black metal plate is called a collector. The collector is placed in contact with the water.

There are several times of metal that can been used for the collector. Corrugated metal will work very well, corrugated sheets often used as roofs on housing. Once the water is heated, it is kept hot with insolation material. This allows the water to stay warn for a long time.

The second part of the solar water heater holds the water for the system. This storage tank can be a cantainer that holds about 100 liters. Two wrapper pipes are attach to the water storage tank. One pipe let's water flow into the system, the other let's the water flow out. When the water heater is working correctly, water will flow from storage to the collector tank and back again.

You can use the hot water at the top of the tank for washing or clearing. You can change of flow of water so that the temperature is hot or warn as design. This solar water heater is easy to build and operate. It will last about two years before the wrapper pipes need to be replace.

There was also something else will to need to make the solar water heater work -the sun. As you might imagine the heater will heat water only on sunning days.

You can get more information about solar water heaters and other projects from rnterprise works vita. This group works internationally to find property. The website is enterpriseworks.org, choose the link for news and resoures, then click on publications.

And that's the voa special english technology report. Tell us if you ever build the solar water heater or have ideas for improvements. Pose your comments at voaspecialenglish.com. Will you can also find transcripts, mp3 and  broadcast about programs. We also offer english teaching activities in the classroom section of our site, I am steve amber.



This post was generated by put listening repetition system,  Check the original dictation thread!

[Homework]SENEWS-2011-04-25

    THIS IS THE VOA SPECIAL ENGLISH TECHNOLOGY REPORT
Solar water heaters are used around the world, and are not very difficult to build. the system we are going to describe is based on the design develop some years ago in Afghanistan. Since then, it has been built and used in many countries.
It can heat 70 liters of water to 60 degrees Celsius, it can do this between sunrise and noon on the clear day with an average air temperature of 32 degrees Celsius, there are two parts to the solar water heater, one part is made of the sheet of the metal painted black, black surfaces become hotter in the sun than surfaces painted in the other color, this black metal plate is called a collector, the collector is placed in contact with the water. There are several kinds of metal sheets that can be used for the collector, x metal will work very well, sheets are often used as roofs on housing.

Once the water is heated, it is kept hot with insulation material, this allows the water to stay warm for a long time, the second part of the solar water heater holds the water for the system. this storage tank can be a container that holds about 100 liters, two rubber pipes are attached to water storage tank, one pipe lets  water flow into the system, the other lets 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 as the top of the tank for washing and  cleaning ,you can change the flow of water so that the temperature is hot or warm as desired , this solar water heater is easy to build and operate, it will last about two years before the rubble pipes need to be replaced,  there are also something else you will need to make the solar water heater work, the sun, as you might imagine, the heater will heat the water only on sunny days, you can get more information about solar water heaters and other projects from enterprise works vita , this group works internationally to fight poverty, the website is enterpriseworks.org, choose the link for the news and resources then click on publications, and that the VOA special English technology report.
tell us if you have ever built a solar water heaters or have  ideas for improvements, post you comments at VOA SPECIAL ENGLISH.COM, or you can also find transcript at pm three and pose casts of our program, we also offer English teaching activities in the classroom section about our set.


This post was generated by put listening repetition system,  Check the original dictation thread!
立即获取| 免费注册领取外教体验课一节

[Homework]SENEWS-2011-04-25

This is the VOA Special English technology report.
Sowler water heater are used adound the world and not very difficult to build.The system we are going to describe is based on the design developed some yers ago in Afghanistan.Since then it has been built and used in many countries.It can hit 70 liters of water to 60 degrees Celsius.It can do this between sunrise and ..on the clear day with average air temperature of 62 degrees Celius.There are two parts soeler water hitter.One part is made of ..of metal ..black.Black services they came he..in the sun then services panited in the other colours.This black metal plant is called a collecter.The collecter is p...in contact with the water.There are several kinds of metal ...that can be used for the collecter.C..metal will work very well.C..are often used as roops on housing.Once the water is heated,it is capped h...with insolation meterial.This alongs the water diss the worm for a long time.The second part of the sowler water heater holds the water for the system.This storage tank can be a container that holds about 100 liters.2 ..are retached to the water storage tank.

This post was generated by put listening repetition system,  Check the original dictation thread!
实现无障碍英语沟通

[Homework]SENEWS-2011-04-25

This is the VOA Special English Technology Report.
Solar water heaters are used around the world and are not very difficult to build. The system we are going to describe is based on a design developed some years ago in Afghanistan. Since then, it has been built and used in many countries.
It can heat 70 liters of water to 60 degrees Celsius. It can do this between sunrise and noon on a clear day with an average temperature of 32 degrees Celsius.
There are two parts to the solar water heater. One part is made of a sheet of metal painted black. Black surfaces become hotter in the sun than surfaces painted in any other color. This black metal plate is called a collector. The collector is placed in contact with the water.
There are several kinds of metal sheets that can be used for the collector. Corrugated metal will work very well. Corrugated sheets are often used as roofs on housing.
Once the water is heated, it is kept hot with insulation material. This allows the water to stay warm for a long time.
The second part of the solar water heater holds the water for the system. This storage tank can be a container that holds about 100 liters. Two rubber pipes are attached to the water storage tank. One pipe lets water flow into the system. The other lets 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 for washing and cleaning. You can change the flow of water, so that the temperature is hot or warm as desired.
This solar water heater is easy to build and operate. It will last about  two years before the rubber pipes need to be replaced.
There is also something else you will need 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 enterpriseworks/vita. This group works internationally to fight poverty. The website is enterpriseworks.org. Choose the link for news and resources, then click on publications.
And that's the VOA Special Technology Report. Tell us if you've ever built a solar water heater or have ideas for improvements. Post your comments at voaspecialenglish.com where you can also find transcripts, mp3s and podcasts  of our programs. We also offer english teaching activities in the classroom section of our site. I'm Steve Ember.

This post was generated by put listening repetition system,  Check the original dictation thread!
口译专员推荐—>口译训练软件IPTAM口译通
HOMEWORK
This is the VOA special English Technology report: solar water heaters are used around the world.

They are not very difficult to built, the system we are going to describe is based on the design developed some years ago in Af*. Since then it has been built and used in many countries. It can heat seventy liters of water to sixty degrees s*. It can do this between sun rise and noon on a clear day with a average air temperature of thirty-two s*. There are two parts of the solar water heater, one is made of a sheet of metal painted black. Black surfaces become hotter in the sun than surfaces painted in the other color. This black metal cleat is called collector. The collector is placed in contact with the water, there are several kinds of metal sheets that can be used for the collector. Carrigated metal will work very well, carrigated sheets are often used as roughs on the housing. Once the water is heated, it's kept hot with a isolation material. This allows the water to stay warm for a long time.

The second parts of the solar water heater holds the water for the system. This storage tank can be a container that holds about 100 liters. Two robber pipes are attached to the water storage tank. One pipe lets water float into the system, the other let water flow out.when the water heater work correctly water will float will flow from the storage tank to the collector and back again. You can use the hot water at the top of the tank for washing and cleaning. You can change the flow of water so that the temperature is hot or warm as desire. This solar water heater is easy 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 need 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 water heater and other project form enterprise works vita. This group works internationally to fight poverty. The website is enterpriseworks.org. Choose the link for news and resources then click on publications.

And that's the VOA Epecial English Technology report. Tell us if you've ever built a solar water heater or have ideas for improvements, post you comments at voaspecialenglish.com where you can also find transcripts,mp3s and popcast of our programs. We also offer English teaching activities in the classroom section of our site, I am Stive Ember.
[>d]   

[0:00.5]
[0:05.7] solar water heaters are used around the world ,and are not very difficult to build
[0:13.2] the system we are going to describe is based on the design developed some years ago in Afghanistan
[0:21.4] since then it has been built and used in many countries.
[0:27.1] it can heat 70 liters of water to 60 degrees celsius
[0:33.4] it can do this between sunrise and noon on a clear day with an average  air temperature of 32 degrees celsius
[0:44.5] they are two parts of the solar water heater,one part is made of sheet of metal painted black.
[0:53.7] black surfaces become hotter in the sun than surfaces in the other color.
[1:01.4] this black metal plate is called a collector
[1:06.3] the collector is placed in contacted with the water.
[1:10.7] there are several kinds of metal sheets that can be used for the collector.
[1:17.2] xxx metal will work very well.
[1:21.0] xx sheets are often used as roofs as housing.
[1:26.7] once the water is heated,it is is kept hot with insolation material
[1:32.8] this allows  the water to stay warm for a long time.
[1:38.4] the second part of the solar water heater holds the water for the system.
[1:44.7] this storage tank can be a container that holds about one hundred liters.
[1:52.0] two rubber pipes are attached to the water storage tank
[1:57.4] one pipe lets water flow into the system ,the other let water flow out.
[2:05.5] when the water heater is working correctly ,water will flow from storage tank to the collector and back again.
[2:15.2] you can use the hot water at the top of the tank for washing and cleaning.
[2:22.2] you can change the flow of water so that the temperature is hot or warm  as desired
[2:31.2] this solar water heater is easy to build and operate.
[2:37.4] it will last about two years before the rubber pipes needs to be placed.
[2:44.6] the resource something else you will need to make solar water heater work the sun.
[2:51.4] as you might imagine the heater will heat water only on sunny days
[2:58.2] you can get more information about solar water heaters and other projects from enterprise works web
[3:07.6] this groups works internationally to fight poverty the website is  enterpriseworks.org
[3:16.8] choose the link for news and resources then click on publication.
[3:23.6] and that is voa special english technology report.

[Homework]SENEWS-2011-04-25

solar water heaters are used around the world and are not very difficult to build, the system we are going to describe is based on the design developed some years ago in standard, since then, it has been built and used in many countries, it can heat 70 liters of water to 60 degrees. it can do this between sunrise and noon on a clear day with an average air temperature of 32 degrees. there are two parts that the solar water heat you, one part is made of a sheet of metal, painted black, black surfaces they can hotter in the sun than surfaces painted in the other color, this black metal collect is called a collector. the collector is placed in contact with the water. there are several kinds of metal sheets that can be used for the collector, coin metal will work very well, are often used as routes on housing. once the water is heated, it is kept hard with incernation materials, this allows the water to stay warm for a long time, the second part of the solar water heater holds the water for the system, this storage tank can be a container that holds about 100 liters, two riber pipes are re-touched to the water storage tank, one pipe lets water flow into the system, the other lets 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 for washing and cleaning, you can change the flow of water, so that the temperature is hard warmed as designed, this solar water heater is easy to built and operate, it will last about two years before the riber pipes need to be replaced, there is results something else you will lead, to make the solar water heater work, the sun. as you can might image, the heater will heat water only on sunny days, you can get more information about solar water heaters and double project from enterprise works witer, this group work internationally to find probility, the web site is enterprise works.com, choose the link for a news and results than collect in publications.

This post was generated by put listening repetition system,  Check the original dictation thread!
实现无障碍英语沟通

[Homework]SENEWS-2011-04-25

This is the VOA special English, Technology Report.
Solar water heaters are used around the world, and are not very difficult to build. The system we are going to describe is based on the design developed some years ago in Afghanistan. Since then, it has been built and used in many countries. It can heat 70 liters of water to 60 degrees Celsius. It can do this between sunrise and noon in a clear day with an average air temperature of 32 degrees Celsius.
There are two parts to the solar water heater. One part is made of a sheet of metal painted black. Black surfaces become hotter in the sun than surfaces painted in the other color. This black metal plate is called a collector. The collector is placed in contact with the water. There are several kinds of metal sheets that can be used for the collector. Colligated metal will work very well. Colligated sheets are often used as roofs on housing. Once the water is heated, it is kept hot with insulation material. This allows the water to stay warm for a long time.
The second part of the solar water heater holds the water for the system. This storage tank can be a container that holds about 100 liters. Two rubber pipes are attached to the water storage tank. One pipe lets water flow into the system, the other lets 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 for washing and cleaning. You can change the flow of water, so that the temperature is hot or warm as desired.
This solar water heater is easy to build and operate. It will last about two years before the rubber pipes need to be replaced. There is also sth else you will need to make the solar water heater to 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 Vita. This group works internationally to fight poverty. The website is enterpriseworks.org. Choose the link for news and resources, then click on publications.
And that's the VOA special English, Technology Report. Tell us if you've ever built the solar water heater or have ideas for improvements. Pose your comments at voaspecialenglish.com. Or you can also find transcripts, mp3, and podcasts of our programs. We also offer English teaching activities in the classroom section of our site. I'm Steve Ember.

This post was generated by put listening repetition system,  Check the original dictation thread!
普特听力大课堂
My homework:
This Voa special english technology report

solar water heaters are used around warm and other very difficult to do.The system will go into describ it is based on design the develop some years ago in the Afganistan. since then it is has been built and used in the many countries.it can heat seventy liter of water to  sixty degree celsuis .It has to base between sunrise  and noon are the clear day with and average in temperature of thirty-two degree celsuis .

They are two parts solar water heater.One part is made sheet of metal painter black. Black surface become hotter in the sun that surface paint in the other color.This black metal played is called a collector.The collector is place in connect with water.Ther are several kinds of metal sheets they can be used of connector.called in better when warm bill in very.caver ofen uses else when hourse.Once the water is heater it's keep hot with insolation  material. This a long water the stay warm for a long time.

   The second part sloar water heater hot water for the system.The storage tank can be a container that holds about one hundred liters.Two rubber pipe are reatch to the water storage tank.one pipe let one flower into the systems.The other liter water flow out.when the water heart is working for correctly water all flow from the storage tank  to the collector and back  again. It can use the hot water and top of the tank for the for washing and cleaning.You can change the flow of water so they tempertaure is hot or warm as desgin.This is solar water heater is easy to built and operate.It let about two years before the rubber pipes need to be replace.Their resources something elso you will need to make the solar water heater work the sun as you might imaging the heart will hear  water alway on sunning days.You can get more information about solar water hearters and other project from enterprize waters viter.This group works international to find property.The website is enterprise works then choice the link for a news and resources then click on publication  . The ends the VOA special english
好栏目推荐之美国口语俚语

[Homework]SENEWS-2011-04-25

Solar water heaters are used around the world and are not very difficult to build. The system we are going to describe is based on the design develop some yeas ago of in Affcanisan. Since then, it has been built and used in many countries.

It can heat seventy liters of water to sixty degrees Celsius. It can do this between sunrise and noon on the clear day with an average air temperature of thirty-two degree Celsius.

There are two parts of a solar water heater, one part is made of the sheet metal of pattern black. Black surfaces become hotter in the sun than surfaces pattern in the other color. This black metal plate is called a collector. The collector is placed in contact with water. There are several kinds of  metal sheets that can be used for the collector.


Corrugated metal will work very well. Corrugated sheets are often used as roofs on housing. Once the water is heated, it is kept hot with isolation material.  This allows the water to stay warm for a long time.  The second part of the solar water heater holds the water for the system. This storage tank can be a container that holds about 100 liters.


Two water pipes are attached to the water storage tank. One pipe lets water flow into the system, the other let 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 water at the top of tank for washing and cleaning. You can change the flow of water so that the temperature is hot or warm as desired. This solar water heater is easy to build and operate. It will less about 2 years before the water pipes need to be replaced.


There's also some other else you will need to make the solar water heater work, the sun, as you might image that heater will heat water only on sunny days. You can get more information about solar water heaters and other projects from enterprise/VITA.


This group works internationally to fight property. The website is enterpriseworks.org.  Choose the link for a news and resources then click on publications.


And that's the VOA special English technology report. Tell us if you ever build a solar water heater or have ideas for improvements. Post your comments at specialenglish.voa.com. While you can also find transcripts, MP3s and podcasts about our programs. We also offer English teaching activities in the classroom section of our site. I'm Steve Ember.






This post was generated by put listening repetition system,  Check the original dictation thread!
[HOMEWORK] SEMEWS-2011-04-25
    This is the VOA special English technology report.
    Solar water heaters are used around the world and are not very difficult to build.The system we are going to discrible  is based on the disigned developed some years ago in Afghanistan.Since then it has been built and used in many countries.It can heat 70 liters of water to 60 degrees celsius.It can do this between sunrise and noon on a clear day with an everage air temprature of 32 degrees celsius.
    There two parts to the solar water heater.One part is made of a sheet of metal painted black.Black surfaces become hotter in the sun than surfaces painted in the other colcor.This black metal plate is called a collecter.The collecter is palced in contact with the water.There several kinds of metal sheets that can be used for the collecter.Coragated metal will work very well.Coragated sheets are often used as roofs on the housing.Once the water is heated  it is kept hot with inslation material.This allows the water to stay warm for a long time.
    The secomd part of the solar water heater holds the water for the system.This storage tank can be a container that holds about  100 liters.Two rubber pipes are attached to the water storage tank.One pipe lets water flow into the system.The other lets water flow out.When the water heater is working correctly,water will flow from the storage tank to the collecter and back again.You can use the hot water at the top of the tank for washing and cleaning.You can change the flow of water so that the temperature is hot or warm as desired.This solar water heater is easy to build ane operate.It will last about two years before the rubber pipes need to be replaced.
    The results or something else you will need 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 viter.This group works internationally to fight poverty.The website is enterpriseworks.org.Choose the link for news and resouraces,then click on publications.
    And that's the VOA special English technology report.Tell us if you've ever built a solar water heater or have ideas for improvements,post your comments at voaspecialenglish.com,or you can also find transcripts,MP3s and podcasts of our programs.We also offer English teaching activities in the classroom section of our site,I'm Steve Ember.

[Homework]SENEWS-2011-04-25

This is the VOA special English technology report. Solid water heaters are used around the world and not very diffcult to built.The system we are getting to discrbe is based on the design the veleper some years ago in Afghanistan. Since then, it has been built and used in many countries. it can hit 17 litters of water to 60 degrees serice.it can do this between sunrise and noon on the clear day with average era temperature of 32 degrees series.there are two parts in the solid water hitter.one part is made of the shade of metal painted black.black surface become hotter in the sun than surface painted in the other color.this black metal plate is called a collecter.the collecter is placed in the contact with the water.there are several kinds of metal shapes that can be used for the collecters.coregated metal were worked very well.coregated shapes are often used as roofs on the housing.once the water is hitted, it is camtain hotter with the inserlation material.this alongs water distay warm for a long time.the second part of solid water hitter holds the water for the system.this storage tank can be acontainer that holds about 100 litters.two rapper pipes are retatched to the water storage tank.one pipe let water flow into the system.the other let water flow out.when the water heater is working correctly. water were flow from the storage tank to the collect and back again.you can use the half water at top fo the tank for washing and cleaning.you can change the flow of water so that the temperature is half  more warm as design.this so learn water heater is easy to build and up read.it was last about 2 years before the rubber pipes need to be replaced. there was also something else you will wait to make the solid water heater work.the sun, as you image merge,the heater will heat water only on sunny days.you can get more information about solid water heaters and doc.project from interprise works weter.this group works internationally to fight powerty, the website is interprise works double owned.truth the link for a news as a reasinces then pick on populacations.and that's the voa special english techonology report.teles if you ever  built solid water heater or have  ideas for improvements.  post your comments at voa special english.com.you can also find transit and part gets of programs. we also offer english teacher activities in the classroom section about site.i'm steven lamber.
                                                     
This post was generated by put listening repetition system,  Check the original dictation thread!
每天半小时 轻松提高英语口语

[Homework]SENEWS-2011-04-25

is the voa special english technology report. solar water heaters are  used around the world and are not very difficult to build. the system we are going to describe is based on the design developed some years ago in the afcanasky. since then it has be built and used in many countries.it can heat seventy litters of water to sixty degrees senciass and can do this between sunrise and noon or a clear day with the anvenge air tempreture of thrity two degrees senciass.
there are two parts of the solar water heater. one part is made of the sheet of mental painted blank .blank services become hoter in the sun than services painted any other color.this blank mental paint is called a celecter.
the celecter is planed to contest with the water. there are several kinds of mental sheets that can be used for the celecter.
corogeated mental will work very well.corogated sheets are often used as roof on housing once the water is heated ,it is capt hard with in serlation material. this allows the water to stay warm for a long time.
the secnd part of the solar water heater holds the water for the system. this storage tank can be a container that holds about one hundrand litters.
two robber pips are retech to the water storage tank. one pip lets water flow in the  system.the other lets water flow out.
when the water heater is workin correctly,water will flow from the storage tank to the celecter and back again ,you can use the hot water at the top of the tank for washin and cleaning. you can change the flow of water so that the tempeture is hot or warm as designed .this solar water heater is easy to build and operate.
it will less about two years beforethe rabber pips need to be replaced.there will aslo something else you will need to make the aolar water heater work: the sun. as you would imagin the heater would heat thw water only in sunny days.
you can get more information about solar water heaters and other projects from inter-prize works Whiter this group works internationally to find powerty.the website is interprize works @ org.choose the click for a news as resources then click on publications.
and hat's the voa technology report .tall us if you ver built thesolar water heater or have ideas for improvements .post your connents at voa special english @com or you can also find transres mp3 and part gets about programs.


This post was generated by put listening repetition system,  Check the original dictation thread!
Homework

This is the VOA Special English Technology Report. Solar water heaters are used around the world, and are not very difficult to build. The system we are going to describe is based on a design developed some * in Afghanistan. Since then, it has been built and used in many countries. It can heat 70 liters of water to 60 degrees Celsius. It can do this between sunrise and noon on a clear day with an average air temperature of 32 degrees Celsius. There are two parts of the solar water heater. One part is made of a sheet of metal painted black. Black surfaces become hotter in the sun than surfaces painted any other color. This black metal plate is called a collector. The collector is placed in contact with the water. There are several kinds of metal sheet that can be used for the collector. * metal will work very well. * sheets are often used as roofs on housing. Once the water is heated, it is kept hot with isolation material. This allows the water to stay warm for a long time. The second part of the solar water heater holds the water for the system. This storage tank can be a container that holds about one hundred liters.  Two rubber pipes are attached to the water storage tank. One pipe let the water flow into the system. The other let 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 for washing and cleaning. You can change the flow of water so that the temperature is hot or warm as desire. This solar water heater is easy to built and operate. It will last about two years before the rubber pipe need to be replaced. There is also something else you will need 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 enterpriseworks.org. Choose the link for news and resources than click on publications. And that's the VOA Special English Technology Report. Tell us if you ever built a solar water heater or have ideas for improvements. Post your comments at voaspecialenglish.com where you can also find transcripts, mp3s and podcasts of our programme. We also offer English teaching activities in the classroom section of our site.
口译专员推荐—>口译训练软件IPTAM口译通

[Homework]SENEWS-2011-04-25

this is the voa special english technology report.
Solar water heaters are uses around the world. and are not very difficult to built. The system we are going to describe is based on the design develped some years ago in Afganistan. Since then, it has been built and used in many countries. It can heat seventy liters of water to sixty degrees celsius. it can do this between sunrise and noon on a clear day with an everage air temperature of 32 degrees celsius.
there are two parts of the solar water heater. One part is made of a sheet of metal painted blank. Blank surfaces become hoter in the sun than surfaces painted in the other color. This black metal plate is called a collector. The collector is placed in contact with the water. There are several kinds of metal sheets that can be used for the collector. Corregated metal will work very well. Corregated sheets are often used as roofs on housing. Once the water is heated, it is kept hot with insulation material. This allows the water to stay warm for a long time. The second part of the solar water heater holds the water for the system. This storage tank can be a container that holds about 100 liters. Two rupper pipes are attach to the water storage tank, one pipe lets water flow into the system, the other lets 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 for washing and cleaning. You can change the flow of water, so that the temperature is hot or warm as desired.
This solar water heater is easy to built and operate, it will last about two years before the rubber pipes need to be replaced. There is also something else we will need 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 viter, this group works internationally to fight poverty. The website is enterpriseworks.org. Choose the link for news and resouses then click on publications.
And that's the voa special english technology report.


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