Heat pipe solar collector

Heat pipe solar collectors are capable of working more efficiently for households in cold climate. The evacuated tubes are coated with a high performance selective absorbing surface that minimizes the reflection of the sun rays. Solar water heater system is the best choice to save the energy and cost for your home. This type with aluminum frame is suitable for flat roof.


  1. Manifold casing material: anodized aluminum alloy, thickness: 3.0mm, manifold insulation: 75mm 120kg/m3 rock wool, maximum operation pressure: 6 bar, manifold color: black.
  2. Heat pipe material:14mm TU1 copper, top thickness:1mm, body thickness:0.6mm, heat transfer fin: AL fin
  3. Evacuated tube material: high boron-silicon glass 3.3, coating of absorber: CU-SS-AL/N/AL, dimensions: OD 58mm x length 1800mm, thickness: 1.6mm.

The evacuated tube solar collector works by absorbing solar energy in the form of UV rays and converting it into thermal energy. An evacuated tube solar collector contains a number of evacuated tubes (we offer between 10 and 30). Each evacuated tube is responsible for independently absorbing the sun’s radiation that reaches it. An evacuated tube is made up of strong borosilicate glass that is joined together. There is a vacuum in between the glass. This layer of vacuum allows the tube to retain its heat once it is gathered. The UV rays are absorbed by an absorbing film which lies in between the layers of glass on the inside layer. The heat is transferred by conduction to an aluminum fin inside the inner layer of glass.


A heat pipe that is inserted into the fin absorbs this heat and transfers it to the copper header at the top of the collector. The heat pipe is a thin copper tube which contains a small amount of alcohol liquid. Once the heat pipe is subject to a small amount of heat the liquid inside vaporizes and turns into steam. It then rises to the top of the heat pipe where it reaches a condenser. Once the heat is removed from the condenser by a heating fluid such as water or a mixture of water and glycol, the alcohol returns to the bottom of the heat pipe where it repeats its cycle. The condenser is inserted into a copper manifold where the heat is transferred to the heating fluid passing through the manifold. A manifold is a copper pipe with a set of sleeves distributed along its length. Each sleeve receives the condensing end of a heat pipe. At this intersection, the fluid flowing through the manifold absorbs all the heat from the condenser and continues through the manifold. This is the best technology for solar water heating on the market!