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Topic: Stirling cycle


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In the News (Thu 16 Feb 12)

  
  General information Stirling : The Stirling thermodynamic cycle
The cycle is remarkable because it enables the cryogenerator to produce extremely low temperatures (to -250ºC), and allows virtually all gasses and liquids to be cooled.
The Stirling cycle is a closed cycle, which means that the cryogenerator cooling gasses never come into contact with the substance (gas or liquid) being cooled.
The Stirling cryogenerator is extremely environmentally friendly: it does not cause ozone layer depletion in any way, does not contribute to the greenhouse effect, and does not discharge any harmful or toxic gasses.
www.stirling.nl /sc/sc3.html   (508 words)

  
  Stirling engine -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: )
As the gas cycles between the hot and cold sides, its heat is transferred to and from the regenerator.
Stirling engines require both input and output (Device that transfers heat from one liquid to another without allowing them to mix) heat exchangers which must contain the pressure of the working fluid, and which must resist any corrosive effects due to the heat source.
Stirling engines, especially the type that run on small temperature differentials, are quite large for the amount of power that they produce, due to the heat exchangers.
www.absoluteastronomy.com /encyclopedia/s/st/stirling_engine.htm   (1283 words)

  
 Stirling engine - Wikipedia, the free encyclopedia
An alternative to the mechanical Stirling engine is the fluidyne, which uses the Stirling cycle via a hydraulic piston.
Stirling engines require both input and output heat exchangers which must contain the pressure of the working fluid, and which must resist any corrosive effects due to the heat source.
Robert Stirling's innovative contribution of 1816 was what he called the 'Economiser' now known as the regenerator which acts to retain heat in the hot portion of the engine as the air passes to the cold part and thus improve the efficiency.
en.wikipedia.org /wiki/Stirling_engine   (2136 words)

  
 Steam & Engine of Australia - Stirling Cycle
Stirling Cycle engines like their cousins the Steam Engine and Internal Combustion Engines are heat engines in that they use heat to produce working power.
The Stirling engine usually is a two piston arrangement, or more correctly one piston and one displacer.
Stirling engines are being tested by NASA (USA Space Agency) for use in space using only solar energy to directly power moving machinery.
www.steamengine.com.au /stirling   (433 words)

  
 No Excuses - Stirling Cycle Refrigeration   (Site not responding. Last check: )
The Stirling cycle cooler is a free piston, linear motor driven device.
According to Sunpower, the developers of Stirling cycle, the Stirling cycle compressor is a "drop-in" replacement for conventional compressors in domestic and commercial refrigerators, air conditioners and heat pumps.
Stirling cycle refrigerators are not yet available on a mass production level.
archive.greenpeace.org /~ozone/excuse/7excuse.html   (299 words)

  
 Stirling renewal   (Site not responding. Last check: )
Stirling's design still engenders excitement and loyalty among hobbyists and enthusiasts from Australia to South Africa to a large U.K. contingent to a California man who powers his canoe with a Stirling engine.
Stirling coolers that incorporate the late 20th-century improvement of a free piston and use helium or molecular nitrogen, instead of CFCs or HFCs, are getting a very close look, in both contract and large corporate research and development.
Sunpower's latest contender in the Stirling cycle system race is Biowatt, which is the trade name for a line of electric generators with a free-piston Stirling engine heated by burning biomass.
www.memagazine.org /backissues/may99/features/stirling/stirling.html   (2901 words)

  
 Rotary Stirling cycle machine - Patent 4206604
Conditioning the working fluid through repeated Stirling cycles causes the machine to function as a prime mover while, in the converse application, the application of rotational force to the crank shaft causes the heater-regenerator-cooler means to function as a refrigerator as the working fluid repeats the Stirling cycle.
The rotary Stirling cycle machine of the present device is generally denoted by the numeral 10 and is shown in the FIG.
The Stirling cycle in cavities 152 and 160 operates as follows: The gas on the cold compression side (cavity 160) is at low pressure.
www.freepatentsonline.com /4206604.html   (3885 words)

  
 Steam & Engine of Australia - Stirling Cycle History
The Stirling engines were best known for their ability to burn almost anything as fuel, their quiet operation, low maintenance, low operating costs and safety.
The Stirling engines were in common use from the times of the Stirling brothers up until the 1920s where internal combustion engines and electric motors made them redundant.
In the Australian outback the Stirling cycle engine is being used to generate electrical power or used directly for useful work.
www.steamengine.com.au /stirling/history   (1126 words)

  
 stirling1
Stirling engines have been built in every size and shape imaginable from a tiny engine which will fit in a matchbox to an 800hp V12 monster intended for marine propulsion.
Stirling proposed an engine which contained two moving pistons, one being a loose fitting plunger known as the displacer and the other being like the piston in a steam engine with a leather sealing washer known as the power piston.
Stirling News is the quarterly newsletter sent out to all society members, and I edited the first 10 editions from January 1995 to Winter 1998.
www.geocities.com /kenboak/stirling1.html   (4791 words)

  
 Stirling-Cycle Research Group - Research - Mechanical Engineering - University of Canterbury   (Site not responding. Last check: )
Stirling Cycle machines are among the most efficient practical heat engines ever built.
The Stirling Cycle Research Group believes that Stirling machinery is a superior replacement for the existing technology currently used in many situations, for example: remote area power supply, small-scale domestic co-generation schemes, most heat-pump applications, and some refrigeration applications.
The result was a variation on the common "Test-tube Stirling" design and is constructed from cardboard, paperclips, marbles, a test-tube, a balloon, and a lot of duct-tape.
www.mech.canterbury.ac.nz /research/stirlingcycle.shtml   (803 words)

  
 American Stirling Company FAQ
A: Robert Stirling was a minister of the Church of Scotland who was interested in the health of his parishioners bodies in addition to the well being of their souls.
He invented the Stirling engine (he called it an "air engine") because steam engines of his day would often explode killing and maiming those who were unlucky enough to be standing close by.
But the best way to really understand Stirling engines is to hold one of our transparent engines in your hands and carefully watch it run.
www.stirlingengine.com /faq/one?scope=public&faq_id=1   (2018 words)

  
 Proe Power Systems - Afterburning Ericsson Cycle Engine - Stirling Engines Aren't the Answer - Fuel Cells Aren't the ...
Stirling engines have a major efficiency loss: their external burners must heat the combustion air from cool room temperature to the high engine operating temperature – an extremely wasteful combustion process.
The closed Stirling cycle also has to reject a corresponding amount of heat, but lacking a fresh air intake and exhaust, must reject all that additional heat through the engine walls.
The Stirling cycle has a final significant practical engineering problem – it is unable to generate practical power levels unless it uses a pressurized, high heat capacity, gas as its working fluid.
www.proepowersystems.com /PROEHOME.HTM   (1715 words)

  
 History of the Stirling
hen in 1816, the Scottish minister Robert Stirling patented the Stirling cycle, he could hardly have foreseen that his invention would be experimented with in the years to come for such sophisticated applications as artificial hearts, high performance automotive engines and space station power plants.
The earliest applications of the Stirling were low power output prime movers, water pumps and kerosene fans.
Thousands of Stirling cycle machines were manufactured in the United States and Europe before the advent of the internal combustion engine.
www.stirling-tech.com /stirling/history.htm   (444 words)

  
 Products & Technology
The Stirling Cycle Engine was devised in the early 1800’s as a safe and efficient alternative to Steam Power.
The air contained within the closed cycle engine was cyclically heated, expanded, cooled, and compressed as the machine would operate.
The Stirling Engine’s usage was primarily industrial throughout the 1800’s, before its obsolescence at the turn of the century with the advent of the internal combustion engine.
www.dekaresearch.com /coreTech.html   (340 words)

  
 Global Cooling - How it Works Stirling Free Piston Stirling Cooler
The Free Piston Stirling Cooler (FPSC) is a device which makes use of the stirling cycle and a moving magnet linear motor for cooling applications.
The stirling cycle belongs to a class of thermodynamic cycles that yield the highest conversion efficiency between mechanical and thermal energy.
The stirling cycle is a reversible cycle which means that heat can be put into the machine and electric power will be produced or electric power can be put in and heat will be removed.
www.globalcooling.nl /howitworks.html   (748 words)

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