Tucson Transatlantic Trade, Inc. Holding Group

Global Development Projects - Energy, Environment, Mining

Stirling Engine

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In Coordination with Dr. Simon Dolidze (on left) and Prof. Zurab Dzotsenidze (on right) of Georgia, the TTT Georgia Development Company is optimizing the design of a top performance Stirling Engine.

In the near future the internal combustion engine will not be able to meet the increasing environmental demands, and the issue of replacing them with external combustion units will reach the public agenda. We propose a working system for an external combustion engine, characterized by a significantly higher coefficient of expansion than the systems presently in use and operating at considerably lower temperatures than other stirling or steam engine models, allowing us to build ecologically clean engines for many applications operating in the 100-150 degree Celsius range. Additionally the use of a thermal accumulator will allow our system to operate in a vacuum state as well. Heat sources for our system can be solar or other secondary heat mechanisms.

A conventional Stirling Cycle involves a confined volume of gas expanding at high pressure and contracting at low pressure, thereby doing work on the surrounding environment, and driven by the absorption and rejection of heat at the engine's hot and cold heat exchangers. Often helium is compressed in a cool chamber and then transferred to another chamber heated by an external burner. The expansion drives a piston that delivers energy. As it cools the gas returns to the cool chamber and the cycle can repeat.

Stirling Engines are of great interest due to almost nonexistent greenhouse emissions and global warming effects. Significant applications are expected in sectors such as:

• Transportation
• Residential Heating
• Energy Cogeneration
• HVAC
• Industrial Air Separation
• Natural Gas Liquefaction

The TTT Dolidze Stirling cycle offers the following operational characteristics in laboratory tests:

• Low Temperature (70-100 Celsius) and Low Pressure (2.2-2.5 MPa)
• Proprietary/Low Cost Gaseous/Crystalline Mixture (GCM)
• Experimental Data:
  
  

  Data Run	Substance	Mass (grams)	Temp (deg.C)	Achieved Pressure (MPa)
  1	Water	50	210	2.20
  2	Water + GCM	50 + 5	170	2.20
  3	Water + GCM	50 + 15	130	2.50
  4	Water + GCM	50 + 25	100	2.50
  5	Water + GCM	50 + 45	70	2.50
  6	Dry GCM	15	170	10.00

  
  
• The GCM provides the ability to generate equivalent pressures at Much Lower Temperatures and Much Higher Coeeficient of Expansion.

Detailed test results are now available. These results will require a password obtained from the president to view.

In 2002-2003 the TTT family of companies, having demonstrated the stability and reversibility (high pressure gas production and condensation) of the proprietary GCM heat transfer compound, expects to carry out the following additional tests:

• sublimation of the GCM compound to determine additional thermodynamic characteristics of condensation
• determination of the marginal characteristics of reciprocity (temperature, pressure, time, catalyst, etc)
• dynamical closed-cycle modeling, with GCM compound being returned into the gas generator mechanically, ie with gas generator and condensor separated)
• comparative study of our Dolidze Stirling engine energetics to other engine types
• corrosion study and optimal materials selection
• application of various heat sources (secondary heat, thermal accumulator, helio, etc)
• linkage of Stirling engine to a turbine system

TTT Georgia is interested in cooperation with industry and research institutions to optimize versions of this technology, utilizing:

• Cylinder/Piston
• Turbine
• Acoustic Stirling Cycle

Contacts are being made with:

• Los Alamos National Laboratory
• Caterpillar
• Phillips
• American Hydrogen Association

For Joint Venture Cooperation: Contact:
Anthony Avila, President, TTT Inc.
aavila@ttthg.com