Evacuated Tube Solar Collector, Frost Protection to Withstand Temperature -15℃
JJ 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 best choice for severe cold areas, can withstand temperatures as low as -15℃.
Product Overview
JJ ETC evacuated tube solar collectors are available in 10, 20 & 30 tube sizes.
Construction
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.
Manifold
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.
Mounting Frame
Strong and easy to install with a range of attachment options.
Collector Operation
Step 1: The JJ evacuated tube solar collector converts sunlight into heat. A circulation pump moves liquid through the collector, carrying heat back to the solar storage tank.
Step 2: Gradually throughout the day the water in the solar storage tank is heated up, either directly or via a heat exchanger (as shown).
Step 3: When hot water is used, solar pre-heated water is fed into a traditional water heater which boosts the temperature if not already hot enough.
Design Advantage
Evacuated Tube and Heat Pipe
The JJ 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 aluminium 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 Aluminium will soften. The spring clips gaurantee long term tight contact with the glass wall and heat pipe, which is essential for optimal performance.
Certifications
Solar Collector Specification
| Model | JJ ETC-20 Solar Collector | JJ ETC-30 Solar Collector |
| Tubes | 20 | 30 |
| Dimensions (LxWxH) | 2005 x 1496 x 136 mm | 2005 x 2196 x 136 mm |
| Peak Output | 1342 W | 2014 W |
| Aperature Area | 1.89 m2 | 2.84 m2 |
| Gross Area | 3 m2 | 4.4 m2 |
| Gross Dry Weight | 63.5 kg | 95 kg |
| Fluid Capacity | 550 ml | 790 ml |
| Flow Rate | 1.4 L/min (max 15L/min) | 2 L/min (max 15L/min) |
| Max Operating Pressure | 800 kPa / 8 bar | 800 kPa / 8 bar |