Directory:Cold Energy LLC

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Cold Energy LLC is working on a method of deriving power from atmospheric pressure differences over geographically-spaced sites, such as locations 100 to 200 miles apart, with reliability comparable to coal, nuclear, gas, and hydro, but at a cost substantially lower, and with no pollution.,696,766_atmospheric_difference_300.jpg

: "This is the first alternative energy technology to come along that has a reliability factor adequate to actually serve as a 'core' generating technology, and not just as a back up or supplement to the grid." -- John R. Crocker, COO Cold Energy, LLC, Oct. 26, 2005


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Official Website

Press Releases


The following is a rare "no prior art" patent.

US Patent #6,696,766 - "Atmospheric cold megawatts (ACM) system TM for generating energy from differences in atmospheric pressure" (PDF) (February 24, 2004)

Abstract : A system for the generation of energy based upon the differences in the atmospheric pressure at geographically spaced apart sites, referred herein as the "Atmospheric Cold Megawatt" energy producing system of the invention (hereinafter "ACM") comprises at least one long conduit, in the order of many miles long, preferably of at least two portions of different internal areas capable of conducting significant amounts of air there through. In operation the air flow in the conduit will accelerate to a high velocity wind without the consumption of any materials and without the use of any mechanical moving parts. A power converter, such as a wind turbine, in the conduit converts the high wind velocity generated by even minute pressure differences into energy of any desired type such as electricity. The opposite open ends of the conduit are located at geographically spaced sites preferably selected on the basis of historical information indicating an historical useful difference in barometric pressure. A plurality of conduits each having open ends in different geographically spaced sites may be interconnected to maximize the existing pressure differences that will assure higher and more consistent levels of energy production.

In the News

Image:Atmospheric gradient illustration 95x95.jpg

Deriving Power from Atmospheric Pressure Differences over Geographically-Spaced Sites - New method of power generation proposes to harness the difference in atmospheric pressure between locations 100 to 200 miles apart, with reliability comparable to coal, nuclear, gas, and hydro, but at a cost substantially lower, and with no pollution. (PESN Oct. 27, 2005)



Pipe Friction

Skeptics would not dispute the fact of the barometric pressure differential (said to be 0.5-0.7 psi). However, they would ask for an explanation why in the absence of natural barriers the wind would not always flow faster than the airflow in the pipes, which impose friction in addition to the intended extraction of energy from the airstream. Relative pressure losses in air ducts may provide an approximation on the technical feasibility.

Net Differential Not Practical

On July 7, 2007, Darren W Murphy wrote:

I just thought I would comment on the Cold Energy LLC in regards to harnessing pressure differentials. As far as my credentials are concerned, I am a 2000 graduate of UC Davis in Atmospheric Science, and 6 months from my masters at the Naval Post Graduate school. I've worked as a meteorologist for the Air Force at the Edwards AFB test facility, Cape Canaveral with NASA, as well as Department of Homeland Defense, and the Special Forces at Fort Bragg NC.

I don't think the idea holds much merit. Certainly there will be a difference in pressure between two geographic areas. However, surface pressure in the absence of a larger scale synoptic pattern is dictated by the local elevation as well as heating. So simply a stationary pipeline will not always have a pressure differential at opposite ends. Additionally, there will still be friction on the inside of the pipe due to the walls and (I am assuming that it will follow terrain) elevation or coordinate changes. The air inside the tube must still follow the laws of physics in reference to elevation changes and any pressure differential at the two ends still has to overcome the obstacles of the elevation. Temperature changes along the distance is more likely to have more of an effect on any pressure flow than the two ends themselves. Lastly, a pipeline a hundred or so miles long? I thought we were moving towards greener energy. How much maintenance would need to be accomplished annually, and natural spaces cleared for such a pipeline?


Cold Energy LLC

P.O. Box 987

Mt. Angel, Oregon 97362


Phone: +1.503.845.2980

Fax: +1.775.218.2591

Email: []

NEC Specialist

New Energy Congress member, Congress:Founder:Sterling D. Allan