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Directory:Closed Loop Ammonia Turbine

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The closed loop ammonia turbine is a variation of the basic heat pump, such as is found in a refrigerator. Heat pumps usually exhibit a Coefficient of Performance (COP) in excess of 1.

The ammonia version was developed extensively internationally in the late 1800's through the 1930's, but fizzled out due to then cheap oil prices. It can be scaled to either utility and commercial size or for home power.

Now that oil is no longer cheap, and now that there is an increased thrust to move away from polluting technologies, it would be a good idea to revisit this neglected gem of a technology. It could provide power several times cheaper than conventional methods, and it could do so cleanly, from renewable sources of input heat such as solar, ambient heat, or even waste heat from power plants.

It is a technology that resembles the solar design put forth by Nikola Tesla, but nowadays can be pieced together from off-the-shelf components.

Table of contents

1 About

1.1 Interview
1.2 How it Works
1.3 Companies
1.4 Patents
1.5 Coverage
1.6 Other Coverage
1.7 Comments
1.8 Related Technologies
1.9 Contact
1.10 See also

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About

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Interview

Download (http://pesn.com/Radio/Free_Energy_Now/recordings/2007/070730_AmmoniaTurbine_ChrisPatton.mp3) - On July 30, 2007, Sterling D. Allan conducted a 1-hour, live interview with Chris Patton as part of the Free Energy Now (http://freeenergynow.net) radio series.

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How it Works

Image Source: Modern Mechanix, as reprinted by TreeHugger (http://www.treehugger.com/files/2007/07/solar_powered_r_2.php), July 23, 2007.

The ammonia turbine is basically a heat pump system, and can be very long-lasting so far as mechanical systems go (20-30 years, with maintenance every 2-3 years).

The system is comprised of a heat expander, in which a heat source causes the liquid to change to a gas, expanding in the process, whereby it can turn a turbine. It is then condensed back to liquid through a four-stage compressor.

Liquid ammonia boils at -45 degrees Farenheit.

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Companies

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Patents

list here

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Coverage

Solar Powered Refrigerator (in 1935!) (http://www.treehugger.com/files/2007/07/solar_powered_r_2.php) - In 1935 California engineer Otto Mohr proposed combining an ammonia absorption cycle refrigeration unit (like the Icyball) with a spherical lens. (TreeHugger; July 23, 2007)

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Other Coverage

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Comments

See Discussion page

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Related Technologies

Ocean Thermal Conversion (http://en.wikipedia.org/wiki/Ocean_thermal_energy_conversion)
Intermittent Absorption Refrigeration (http://www.rexresearch.com/interefr/patents.htm) - Select Articles, Abstracts, Google search results, & Patents (RexResearch.com, NEC)

Tesla's Solar Ideas : 1916 Reprint - According to The Electrical Experimenter, in addition to his prolific electrical work, Tesla patented a sun motor. The article also discusses the Shuman-boy's engine and sun boiler installed in Egypt with output of 100 horsepower.

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