stone cold solar

Cold-chain vaccine refrigeration

From the point of manufacture to the time of injection, vaccines need to be kept within a precisely controlled temperature range. Typically, this range is between 2-8 degrees Celsius. If the vaccines are exposed to temperatures outside of this range, they can lose their effectiveness. In low-resource settings where there might not be reliable electricity, transportation, or trained medical personnel, these losses are unfortunately common. Currently, vaccines are transported from hospitals or distribution centers to clinics in a system known as the 'cold chain'. Often times, they are transported in a passive vaccine carrier lined with ice packs. Though affordable, these carriers are not controlled and do not provide temperature feedback. This often results in accidental "temperature excursions" that deactivate the potentially live-saving vaccines.

3rd Stone Design aims to improve the cold chain vaccine distribution system with a portable, rechargeable vaccine refrigerator that can be temperature controlled and remotely-monitored. The 'Stone Cold Solar' unit combines active cooling and real-time temperature feedback to prevent accidental loss of vaccine loads. The unit features GPS tracking and run reporting from remote locations so that the necessary personnel can be notified if the temperature goes out of the preset range. In order to maintain functionality off the grid, the Stone Cold Solar has a detachable solar panel that can be used to trickle charge the on-board battery.

This project is an entirely internally lead effort of 3rd Stone Design. All industrial and thermal design, mechanical and electrical engineering, as well as manufacturing liaison and field interaction has been carried out by our team of talented designers and engineers. The device is currently being readied for field evaluation in the distribution of significant and hugely important new vaccines for potentially pandemic diseases in West Africa.