vacuum tube solar collector

All Stainless Steel Vacuum Tube Circulating Solar Water Heater with high efficiency solar collector
All Stainless Steel Vacuum Tube Circulating Solar Water Heater
You are bidding on a vacuum tube type all stainless steel
solar water heater
, model WKSC-1.8M/24. This is the latest and by far the most efficient
solar water heater
technology.
The collector area consists of 24 double walled vacuum insulated borosilicate glass tubes approximately 60 inches long. Basically, the tubes function like thermos bottles. The outer wall is transparent, while the inner wall has a dark solar absorbtive coating. Between the two walls is a vacuum. Sunlight passes through the outer wall and is absorbed by the dark inner wall, thereby heating it. In the middle of the tube is a heat pipe, which conducts the heat to the water (or water/antifreeze mixture) in the super insulatedcopper header. Because of the vacuum, heat cannot be conducted back out through the collector tubes, so all the collected heat can only go into the header. Because of the heat pipes, there is no water in the glass collector tubes, so even if one breaks, the water will not leak out, and the system will continue to function normally, although with slightly less efficiency.
Normally, the water is circulated by a pump through the header and through a heat exchanger in a remotely located tank. It can alternatively be circulated through a radiant floor heating system, or other storage medium. We also have some all stainless 280 liter (74 gal) insulated tanks with copper heat exchange coils available.
The inlet and outlet to the header are standard 1/2" copper tubing . Collectors can easily be connected in series if you need more capacity.
Normally you will also need a circulating pump and controller for a complete system. We have some pumps and prototype controllers available.
Unlike the standard
solar water heaters
you can buy anywhere, these are constructed of 100% food grade (304) stainless steel, even including the stand and mounting bolts. Regular water heaters generally have a 5 year warranty, which is about how long they last before rusting out. These should last indefinitely (they have a 20 yearwarranty from our factory ), and furthermore, you never have to pay for gas or electricity to run them.
Additionally, you will probably need (depending on the design of your system) some or all of the following:
a storage tank or other storage medium
pump and controller
copper tubing and fittings
expansion tank
insulation for exposed copper lines
You are welcome to email us if you need more information on our
solar collectors
!