SunOyster 16 model 2.0 - Solar Thermal-Electro Station


The SunOyster is a concentrated solar collector that produces both heat and electricity from the same device, achieving efficiencies higher than anything else available in the market. It achieves high efficiency from a small area. (2 to 3 times higher than a standard installation), produces high grade heat – (higher temperature than standard thermal collectors) and is more cost effective than separate thermal and electrical panels. By using thermal refrigeration systems to convert the heat into cold, the SunOyster can cover the complete energy demand of hotels, office buildings, shopping centres or cool stores. The SunOyster can also cover the power and high grade heat requirements of many industries such as food, textile or chemical manufacturers.
The SunOyster 16 (SO 16) is a patented concentrating solar collector with roughly 16 m2 gross mirror surface. It tracks the sun bi-axially to generate heat and potentially electricity. The SO 16 comes in 4 versions:
  • The purely thermal SO 16 heat generates up to 12 kW of thermal power.
  • The SO 16 hybrid generates in its receiver both electricity and heat, at present up to 3.2 kW of electricity and 6.0 kW of heat.
  • • SO 16 heat as well as hybrid can in the version pvplus be combined with 12 photovoltaic (PV) modules with an additional output of up to 3.8 kW of electric power.
Installation:
The SO 16 requires a horizontal surface or platform for in- stallation. It can be installed on roofs, carports or on the ground. The sub-structure of the SO 16 can be e.g. a con- crete or asphalt surface, concrete plates, ground anchors or steel beams. On this, twelve base profiles support the ring profile of the SO 16. Each support point for the base profiles has to carry a static weight load of 100 to 150 kg, plus varying dynamic loads.

Mechanics:
• The SO 16 has – including pvplus – a swept diameter of 8.30 m, corresponding to a circular surface of approx. 54 m2.
• Ring profile:
Rail profile S7 in corten steel, 5.24 m in diameter.
• Main frame:
Rolled steel profiles with zinc-aluminum-magnesium (ZAM) coating. Main frame rolling on steel or polymer wheels on the ring profile.
• Other profiles: Hot-dip-galvanized steel profiles.
• Torque tube: 2 torque tubes at a horizontal distance of 3 m from each other, with the back torque tube elevated to minimize shading.
• Mirrors:
On the torque tubes, the two semi-parabolic mirror troughs have a width of 3,870 mm and a height of approx. 1,900 mm and consist of three mirror segments each. 4 mm of toughe- ned glass, reaching approx. 95% reflectivity, with ceramic pads on the back side for installation. Concentration factor >= 30.

Warning – avoid concentrated radiation in eyes, on the skin or clothes!

• pvplus: In the front and on both sides of the SO 16 each 4 PV modules, fixed at approx. 17° to the ground and tracking the sun together with the SO 16 from East to West.
Tracking: Two-axis in Azimuth and Elevation:

Azimuth tracking from East to West ≥ 350° rotation angle; gear motor. Elevation tracking working angle 160°; two individual drive systems with worm gears.
Warning – beware of moving parts!

SO 16 heat - thermal receiver:
Insulated and protected by a 3 mm borosilicate glass tube with anti-reflective coating. The thermal receiver features inside a steal tube with selective coating.

SO 16 hybrid - hybrid receiver:
Insulated and protected by a 3 mm borosilicate glass tube with anti-reflective coating, the hybrid receiver features inside an extruded aluminum profile. On this, glass lenses – the so-called “SunOyster Crystals“ – concentrate the light a second time onto the multi-junction concentrator PV (CPV) cells which have up to 44 % cell efficiency. Temperature co-efficient for power: -0.1%/K.

Expected power output of model 2.0:
Control System:
• Customized and highly integrated control system with 3 independent motor controllers.
• Redundant safety system with integrated temperature switches in each receiver.
• Integrated UPS system for closing the SunOyster during main grid failure.
• Local or central weather station equipped with the following sensors:
⠀• Anemometer and
⠀• Radiation sensor.
• Power consumption: 10-20 W average (max. 300 W).

Data Interconnection:
Junction box with RJ45 ethernet port. The ethernet cable shall be positioned at the center of the SO plus 1m cable length.

Thermal Properties:
• Heat transfer medium in areas without freezing temperatures: Demineralized water. In other areas: solar fluid, i.e. water glycole with corrosion protect ion additives. Standard version max. temperature of working fluid: 105°C. High temperature version up to 170°C, with thermal oil more.
• System pressure: min. 3 bar (2 bar gauge pressure) and max. 7 bar (6 bar gauge pressure) for standard version, for high temperature version up to 16 bar.
• Flow Rate: Minimum flow of 250 l/h, at full radiation 750 l/h, maximum flow 1,500 l/h.
• Pressure loss: ≤ 0.5 bar at 1,500 l/h.
Warning – the high fluid temperature can cause burning hazards!
PV Inverter System:
• SO 16 hybrid: 1x ABB UNO-DM- 3.3-TL-PLUS
• SO 16 hybrid pvplus: 2 x ABB UNO-DM- 3.3-TL-PLUS
  • Integrated DC disconnect switch.
  • Max. efficiency: 97,0 %.
  • Grid connection type: AC Single Phase (L / N / PE).
  • Rated AC voltage: 230 V.
  • Rated output frequency: 50 Hz or 60 Hz.
  • Recommended external AC overcurrent protection: 16 A.
  • Anti-islanding protection: According to local standards.

Electric Interconnection:
Junction box with clamp terminals for the cable (max. wire size 2.5 mm2). The cable shall be positioned at the center of the SO plus 1m cable length.

Thermal Interconnection:
Pipes for the hot fluid should be installed to within a distance of 1m from the center of the SunOyster. Stainless steel pipes are preferred. The pipes should have a minimum inner diameter of 25mm (1inch) – preferably larger for long runs. The two ends have a 1 inch external pipe thread.

Environmental limits:
• Operational temperatures: - 30°C to + 45°C.
• Survival temperatures: -40°C to +70°C.
• Air humidity: 0-100 %, condensing.
• Wind: normal operation up to 55 km/h. Survival in safety position with normal turbulence up to 150 km/h.
• Remove snow on SunOyster.
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