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Compressed air tank force1/12/2023 ![]() ![]() The pistons, each of which is taller than a full-grown man, compress a combination of air and foamy water, which is then pumped into storage tanks. To store energy, a permanent magnet motor-generator turns the engine's crankshaft, driving six pistons located above it. That means utilities or even commercial customers could place a storage device in a range of industrial locations, rather than only where there’s an underground formation available.Īt the base of SustainX’s machine, called the S165, is the bottom half of a diesel engine normally used to propel ships. SustainX takes a different tack: it uses compressed air as the energy storage medium, but holds the air in large pipes, the same used in natural gas pipelines. The appeal of this technology is that it’s relatively low cost and can store many kilowatt-hours of energy. ![]() During the day, the air is released, heated with natural gas, and forced through a turbine to generate power. The first two plants of this type put into operation-one in McIntosh, Alabama in 1991, and the other in Huntorf, Germany in 1978-use salt caverns as storage tanks, pumping compressed air in at night, when energy demand is lowest. The project was funded by $5.4 million from the Department of Energy and at least that much from SustainX, according to a representative.Ĭonventional compressed-air energy storage uses a compressor to pressurize air and pump it into underground geological formations. The company will use the machine to gather data on performance and and to show off the technology to potential investors and customers. The startup, based in Seabrook, New Hampshire, began operating a full-scale demonstration system that stores energy as compressed air in pipes and supplies 1.65 megawatts of power. electricity grid, albeit in a vastly different form. This week, SustainX is bringing the technology back to the U.S. Only a handful of compressed-air energy storage (CAES) plants have been installed since the 1970s. ![]()
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