|System||Solar and Wind as renewable energy sources to a sealed lead-acid battery bank.|
|Location||Two sites are located on the North Slope of Alaska approximately 8 miles NE of Toolik Field Station and 2 miles from the Dalton Highway. (68° 36' N, 149° 18' W)|
Two autonomous power and communications systems in support of separate instrument towers measuring gases and meteorological data.
These autonomous power and communications systems were developed by ABS Alaskan in support of the NSF supported Brett-Harte/Shaver project, part of the more encompassing AON (Arctic Observing Network) initiative. These units were originally intended as temporary support infrastructure, while a long-term solution could be developed. Due to budget constraints, the original project scope and requirements have been reduced, and no longer include provision for more power consumptive winter time instrument de-icing.
These skid mounted units are capable of being transported by sling load from a large helicopter, but must be disassembled for transport by smaller aircraft. Power generation is provided by a 650 Watt PV array and a 900 Watt rated wind turbine. Energy storage is provided by an AGM type battery bank rated at 43,000 Watt-hours at the 24 hour rate. This provides for a 15 day period of autonomy with no energy input from sun or wind, not dropping below a 65% state of charge.
The PV array and wind turbine are supported by a tilt-up, guyed lattice tower, attached at the base to the skid unit. An insulated fiberglass enclosure is also mounted to the skid, and houses the batteries and all electronics.
The system operates at 48VDC nominal, obviating the need for power inverters for transmission to the instrument towers, located approximately 100' distant from the systems. Efficient DC/DC converters reduce the voltage to 12VDC to power instrumentation at the towers, as well as the communications equipment within the modules.
Iridium modems at the power modules are intended to relay power system status and a daily photo from the webcam, located at the ridge site. Similar modems at the towers are intended to relay science data to the researchers home institution.
Detailed report by Tracy Dahl (3.0 MB)