Compressed Air Energy Storage (CAES) - Capture & Store Prime Excess Energy

Micro CAES ISO Container

Compressed Air Energy Storage (CAES) technology is the compression of ambient air to more than 3,000 p.s.i., stored until needed for peak load times or even base load power supplies. Precise management of the pressurized tanks to turbines yields an instant supply of power when needed and most valuable.

Micro CAES ISO Containers

CAES is designed to capture excess renewable energy from sun, wind, or hydro and convert that electrical energy into compressed air, a different form of energy and one that can be stored with little loss over time. That compressed air is then stored in pressurized vessels as pictured above or in purpose built underground vessels for later use. When electricity is needed, the compressed air is released through small nozzles that blow across the blades of a turbine generator, much like conventional steam, creating power.

CAES System CAES System [MW + Mwh]
Downtown Macro CAES Downtown Macro CAES in Bore Construction

Containerized micro CAES systems are available in 1 MW increments each when situated behind the grid connection of the generation facility. Global assists with all permitting and licensure; coordination of control software. Typically, PPAs are not required to be rewritten; CAES delivers energy of the same renewable character to the grid but for extended periods of time. The release is merely timed to coincide with demand. CAES fits within the base of a Wind Turbine, each 30m tall. Similarly, a data center has no room for an ISO container, we use the roof or parking garage. Our storage cylinders are flexible giving from 1MW to 30MW. CAES is truly flexible, individual stacked cylinders, an ISO container, a trailer, a barge for storage of 30MW upwards to the larger in ground storage of 1000MW or more.

“Pressurized tanks in stackable trailerized ISO containers can go just about anywhere; roof, barge, parking garage. No restrictions on placement.” Andrew J Mueller, Chairman CEO

A recent example of a battery backup project required a 120 20’ containers to achieve 100MW sustained power requirement. The configuration did not work properly in the hot climate and they needed to disposed of 2.4 million worth of batteries.

Macro CAES in Ground Storage

Underground CAES systems utilizing natural caverns have been proven successful on a commercial scale for over 40 years in Germany and the USA.

Macro CAES in Ground Storage Macro CAES in Ground Storage
CAES storage, installed with Vertical Bore Platform (VBP), are now available.The boring of deep, large-diameter vertical shafts that can be built almost anywhere to serve as compressed air storage vessels.

Vertical Bore is a 30 to 200 foot diameter, deep vertical tunnel boring process for installing the CAES Program pressure vessel.

The Vertical Bore process is an astounding 180 days. Pressure vessels catering to power generation plants of 20MW through to 1000MW can be accommodated with pressure vessels of 30 foot to 200 foot in diameter and depths of 500 through 4000 foot. Other applications for underground pressure vessels or containment are storage of Natural Gas, LNG, LPG, Petroleum, Water, Feed Stocks or Records storage. ;

The Vertical Bore plant meets or exceeds all moratoriums, EPA mandates and federal emission standards by using natural gas to power engines, cranes, hydraulics and compressor, including firing the generators used throughout the site infrastructure. The Vertical Bore Platforms design enables water, perishables, crew quarters, emergency accommodation and other amenities to be housed on various levels.


Cavern compared to Empire State Building Natural Salt Cavern CAES Size Compared to Empire State Building