Solar vacuum tubes are very similar to a well build thermos. The air in between two glass layers is sucked out during the manufacturing to form a vacuum. Inside the vacuum layer there is no air so there is no means of transferring heat from one layer to the next. This allows the vacuum tube to capture the suns energy by unto 97% and only losing about 7%. This makes vacuum tubes extremely efficient.
Solar vacuum tubes are very similar to a well build thermos. The air in between two glass layers is sucked out during the manufacturing to form a vacuum. Inside the vacuum layer there is no air so there is no means of transferring heat from one layer to the next. This allows the vacuum tube to capture the suns energy by unto 97% and only losing about 7%. This makes vacuum tubes extremely efficient.
The vacuum tube consists of 4 specially coated layers of copper, and aluminium, and stainless steel on the inner tube. These layers absorb the suns energy and transfer it to the centre of the vacuum tube through a heat fin.
A solar vacuum tube collector works by transferring the heat energy from the sun to a copper heat pipe located inside the vacuum tube. This copper heat pipe contains a small amount of distilled water inside the tube. The tube is created like the glass evacuated tubes under a vacuum condition. This vacuum is the key to the solar water heater. You see at sea level water boils at 100 C. However, as you reduce the pressure the boiling point of water changes. In fact, water boils at the top of Mount Everest at only 35 C. This is because there is less pressure. Because the water inside the copper heat pipe is in a vacuum (reduced pressure) it boils at a much lower temperature of only 30 C.
The boiling water creates steam vapour that rises to the top of the heat pipe into the expansion bulb. This bulb is inserted into a copper heat exchanger and the hot steam loses its temperature and pressure and turns back to water. This cycle is continuous and involves no moving parts. This means the life of a solar vacuum tube is 20 plus years!
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Latitude51 Solar Heating System are distributed across Canada ,USA, Mexico and Caribbean. We are a North American Distributor for solar water heating equipment. By eliminating the traditional wholesale distributors, we sell direct to contractors and home owners across North America so they can buy our solar at affordable prices. We are forever expanding our network of distribution locations around Canada and USA. If you would like to join our team then call us at 1 (800) 317-9054
