Evacuated Tubes

 

Apricus solar collectors use twin-glass evacuated tubes. They are comprised of two glass tubes, fused together at the top and bottom. The space between the two tubes is evacuated to form a vacuum. The structure is therefore very similar to a Thermos® flask you may use to keep water hot. The outer layer of the inner tubes is coated with a special selective layer which absorbs sunlight very efficiently. The vacuum layer insulates very well against heat loss providing excellent performance even in cold weather.

 

To learn more about the different types of solar collectors and evacuated tubes, please click here
Apricus solar collectors have from 10 to 30 evacuated tubes, with each tube 1.8m / 70" long and 58mm / 2.3" in diameter. Each tube contains a long heat transfer fin and a heat pipe. The fin acts to hold the heat pipe in place against the inner wall of the tube, and also provides additional heat transfer.

 

To learn more about heatpipes, please click here.