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BizVerify |
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| JIANGSU YABANG SOLAR ENERGY CO., LTD. |
| Verified By : SINOTRUST |
| Verified Date : 2008-09-05 |
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| Model No.︰ | - |
| Brand Name︰ | - |
| Country of Origin︰ | China |
| Unit Price︰ | - |
| Minimum Order︰ | - |
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The heat pipes used in YABANG solar collectors have a boiling point of only 25℃. So when the heat pipe is
heated above 25℃ the water vaporizes. This vapor rapidly rises to the top of the heat pipe transferring heat. As the
heat is lost at the condenser (top), the vapor condenses to form a liquid (water) and returns to the bottom of the heat
pipe to once again repeat the process.
Material quality and cleaning is extremely important to the creation of a good quality heat pipe. If there are any
impurities inside the heat pipe it will affect the performance. The purity of the copper itself must also be very high,
containing only trace amounts of oxygen and other elements. If the copper contains too much oxygen or other
elements, they will leach out into the vacuum forming a pocket of air in the top of the heat pipe. This has the effect of
moving the heat pipe's hottest point (of the heat condenser end) downward away from the condenser. This is
obviously detrimental to performance, hence the need to use only very high purity copper.
Each heat pipe is tested for heat transfer performance and exposed to 250℃ temperatures prior to being
approved for use. For this reason the copper heat pipes are relatively soft. Heat pipes that are very stiff have not
been exposed to such stringent quality testing. Given this strict quality control and high copper purity, the life
expectancy of the heat pipe is even longer than that of the solar tube. |
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