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| Heat Pipe Solar Collector |
1. Heat-pipe vacuum tube
2. Rockwool Insulation layer
3. Manifold
4. Stent
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Heat-pipe vacuum tube
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The heat pipe is hollow with the space inside evacuated, much the same as the solar tube. In this case insulation is not the goal, but rather to alter the state of the liquid inside. Inside the heat pipe is a small quantity of purified water and some special additives. At sea level water boils at 100oC, but if you climb to the top of a mountain the boiling temperature will be less that 100oC. This is due to the difference in air pressure.
Based on this principle of water boiling at a lower temperature with decreased air pressure, by evacuating the heat pipe, we can achieve the same result. The heat pipes used in solar collectors have a boiling point of only 30oC. So when the heat pipe is heated above 30oC the water vaporizes. This vapour rapidly rises to the top of the heat pipe transferring heat. As the heat is lost at the condenser (top), the vapour condenses to form a liquid (water) and returns to the bottom of the heat pipe to once again repeat the process.
At room temperature the water forms a small ball, much like mercury does when poured out on a flat surface at room temperature. When the heat pipe is shaken, the ball of water can be heard rattling inside. Although it is just water, it sounds like a piece of metal rattling inside.
This explanation makes heat pipes sound very simple. A hollow copper pipe with a little bit of water inside, and the air sucked out! Correct, but in order to achieve this result more than 20 manufacturing procedures are required and with strict quality control. |
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Rockwool Insulation layer
Rockwool is a very popular insulation material, used throughout the world in many high temperature insulation applications. Rockwool is also non-flammable, and so an excellent choice for a high temperature solar thermal solar collector. One key advantage of Rockwool is that it can be molded into any shape. Via a process similar to baking a cake, the glass wool is "cooked" at high temperatures matching perfectly the shape of the header and the Heat-pipe vacuum tube |
Manifold
The manifold casing serves two main purposes, protecting the header and glass wool insulation from the elements, and making the collector attractive and neat. The casing is made from corrosion resistant grade aluminium and is available in a black finish.
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Stent
The Jinyi Solar Collector can be installed on most roof surfaces, and a full range of roof angles. A standard frame is provided with all collectors, and additional frame kits are avaiable to suit most common installations. The various frame components can also be used to install on most other non-standard surfaces.
The frames are designed to withstand high speed winds; the tubes provide minimal resistance due to the round shape. Attachment points must also be strong enough to withstand significant pull forces that will occur during strong winds.
Low, Mid & High Angle Roof Frames
Frame kits are available which increase the angle of the solar collector, from as little as 12o to as high as 53o, allowing the collector to be installed at an optimal angle. The frames kits even allow mounting on a wall. |
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COPYRIGHT(C) 2008-2009 JINYI. ALL RIGHTS RESERVEDCI |
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