Contained Energy has successfully developed and deployed stand-alone, off-grid, 100% solar-powered cold storage facilities with unique cost-economy through the application of thermal energy storage (TES) technology in combination with ultra-efficient compressor packages.
The 20 cubic metres unit shown here was designed to keep 500 kg of fish at -2ºC, with the capacity of adding and cooling 200 kg of ‘un-iced’ fish per day (for a total cooling load of 30 kWh per day).
It is energised by a 6.4 kWp solar array through a 3-phase inverter system, backed up by a relatively small 10 kWh VRLA battery bank.
The unique feature of the system is that it deploys a large volume of Phase Change Material (PCM) in the ceiling, capable of storing and releasing 15 kWh of cooling capacity at -4ºC. This thermal energy storage technology allows the compressor package to do most of its ‘cooling work’ during the day, when the solar power is available, saving a substantially larger quantity of battery storage that would otherwise be required.
The Cold Storage helps fishermen to keep their fish fresh after they coming back with their hunting.