Apricus ETC evacuated tube solar collectors convert energy from the sun into usable heat in a solar water heating system. This energy can be used for domestic and commercial hot water heating, pool heating, space heating or even air conditioning.
The ETC solar collector is comprised of four main parts:
Evacuated Tube (ET)
Absorbs solar energy and converts it to usable heat. A vacuum between the two glass layers insulates against heat loss. The Heat Transfer Fin helps to transfer heat to the Heat Pipe.
Heat Pipe (HP)
Copper vacuum pipe that transfers the heat from within the ET up to the manifold. You can see this process in the bottom picture on the left. The heat pipes used in solar collectors have a boiling point of only around 30oC (86oF), so when the heat pipe is heated above this temperature the water begins to vaporize (turn to steam). This vapor rapidly rises to the top of the heat pipe and carries with it large amounts of heat. As the heat is off-loaded to the to the cooler liquid circulating through the solar collector header pipe at the bulb (top), the vapor condenses to form a liquid (water) and returns to the bottom of the heat pipe to once again repeat the cycle.
Insulated box containing the copper header pipe. The header is a pair of contoured copper pipes with dry connect sockets that the heat pipes plug into.
Strong and easy to install with a range of attachment options.
ETC solar collectors can be mounted on a roof, wall, the ground or custom built.
The evacuated tube and heat pipe are assembled in a patented format that is different to any other product on the market. Rather than a centrally located heat pipe with heat transfer fins radiating out to the glass wall, the heat pipe is positioned directly against the glass wall, where the sun strikes. The aluminum heat transfer fin is tightly held against the top inner wall of the evacuated tube and heat pipe with a set of spring clips. This is an important design feature as over time, with exposure to high temperature, the Aluminum will soften. The spring clips guarantee long term tight contact with the glass wall and heat pipe, which is essential for optimal performance.
Solar hot water systems normally incorporate a solar hot water tank that stores the solar heated water. Depending on the system design a single tank may incorporate both solar and auxiliary heating (gas, electric etc) or a dedicated solar tank may supply pre-heated water to a second tank that is heated by traditional energy sources.
Tank designs vary somewhat between countries and markets depending on climate, local regulations and system design norms. Blue Sky Solar is able to supply a range of hot water tanks to suit most domestic application or use quality local brands where appropriate.