Compressed air storage is only as efficient as the insulation on the storage reservoir. Without insulation, the heat generated by the compression process is los

Compressed air storage is only as efficient as the insulation on the storage reservoir. Without insulation, the heat generated by the compression process is lost, and much of the stored energy goes along with it. This drives up the cost of building efficient compressed air storage systems, but there are several projects underway that are attempting to find cost-effective solutions to this problem.