Evacuated Tube & Heat Pipe Solar Collectors
Four-season efficiency
Greenland Systems solar collectors will efficiently deliver hot water all year round, even in winter and in cold & overcast weather, when most other solar collectors cannot deliver any heat at all.
Greenland Systems solar collectors will out-perform most solar collectors in all climatic conditions. Superior performance in unfavourable operating conditions, of cold ambient air temperature and low solar intensity, significantly sets Greenland Systems solar collectors apart from most other solar collectors on the market.
Dry heat interface (DHI) advantages
- Extremely easy installation of evacuated tube.
- No blockages through stone build up.
- Excellent heat transfer.
- Allows optimum tube orientation.
- Minimum maintenance.
- No leakages.
Technical specifications
| Collector Type | GL70-20 | GL100-16 | GL100-16PT | GL100-16DF |
|---|---|---|---|---|
| Construction | HP1 DHI2 | DF3 | ||
| Tubes Per Collector | 20 | 16 | ||
| Tube Dimensions ø x Length (mm) |
70 x 1765 | 100 x 2015 | ||
| Collector Dimensions Length x Width (mm) |
1935 x 1800 | 2160 x 1940 | 2160 x 1920 | |
| Dry Mass | 61 kg | 91 kg | 97 kg | |
| Fluid Capacity | 0.80 lt | 0.96 lt | 3.00 lt | |
| Fluid Pressure Drop @ 120 lt/hour |
0.28 kPa | 0.20 kPa | 0.84 kPa | |
| Fluid Pressure Drop @ 480 lt/hour |
2.75 kPa | 2.24 kPa | 5.40 kPa | |
| Solar Aperture Area | 2.25 m2 | 3.00 m2 | 2.95 m2 | |
| Effective Thermal Capacity to EN 12975 | 10.59 kj/K | 13.50 kj/K | 14.80 kj/K | 38.50 kj/K |
| Peak Output4 | 6.10 MJ/hour | 7.90 MJ/hour | 7.60 MJ/hour | 8.45 MJ/hour |
| Annual Energy Yield5 | 11,010 MJ/year | 14,260 MJ/year | 16,080 MJ/year | 15,700 MJ/year |
| Hail Test AS/NZS 2712 | PASS | |||
| Stagnation Temperature6 | 234 °C | 235 °C | 221 °C | 276 °C |
| Tube Cross Section |  |
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- 1 HP: Heat Pipe Vacuum Tube
- 2 DHI: Dry Heat Interface
- 3 DF: Direct Flow
- 4 Measured at 1,000 W/m2 of normal irradiance
- 5 Location: Canberra, ACT on historical solar data
- 6 Measured at 1,000 W/m2 of normal irradiance
Greenland Systems advantages
- Greenland solar evacuated tubes are frost resistant.
- Greenland solar evacuated tubes have the ability to withstand high fluid pressure.
- Have the highest efficiency in all climatic conditions, any time of the year.
- Due to the "dry heat interface" and large manifold cross-section area, high mineral & calcium content in the water does not present a problem.
- Low collector fluid pressure drop of only 2.2kPa at 300 litres per hour flow rate.
- Extremely easy to assemble, install and service.
- Greenland solar collectors have very low overall thermal inertia. They will increase their fluid temperature rapidly, and are therefore able to convert to useful heat even very short periods of sunshine.
- Evacuated (vacuum) tubes can be independently rotated for optimum solar incidence angle.
