The Einstein-Szilard or Einstein's refrigerator is an absorption refrigerator that has no moving parts, operates at constant pressure, and requires only a heat source to operate. It was jointly discovered in 1926 by Albert Einstein and his former student LeÃÆ'³ SzilÃÆ'¡rd, who patented it in the US on November 11, 1930 ( U.S. Patent 1,781,541 ). This is an alternative design from the original invention of 1922 by the inventors of Swedish Baltzar von Platen and Carl Munters.
Video Einstein refrigerator
Histori
From 1926 to 1934 Einstein and SzilÃÆ'¡rd collaborated on ways to improve home refrigeration technology. Both were motivated by contemporary newspaper reports about a Berlin family who were killed when the seals in their refrigerator failed and the leaking of toxic fumes into their homes. Einstein and SzilÃÆ'¡rd propose that devices without moving parts will eliminate the potential for seal failure, and explore practical applications for different cooling cycles. Einstein used the experience he gained over the years at the Swiss Patent Office to apply for a valid patent for their invention in several countries. Both were eventually given 45 patents on their behalf for three different models.
It has been suggested that most of the actual inventions were made by SzilÃÆ'¡rd, with Einstein acting only as a consultant and assisting with documents relating to patents, but others asserting Einstein was working on the project.
Refrigerators are not immediately put into commercial production; the most promising of their patents were quickly purchased by the Swedish Electrolux company. Einstein and Szilard earned $ 750 (equivalent to $ 10,000 today). Some demonstration units are built from other patents.
Maps Einstein refrigerator
Today
In September 2008 it was reported that Malcolm McCulloch from Oxford University was heading for a three-year project to develop more powerful equipment that could be used in locally-deficient power, and that his team had completed the prototype. He was quoted as saying that improving the design and changing the type of gas used allowed the design efficiency to quadruple. The same cooling device was proposed by Adam Grosser at TED Talk in 2008, but has not been produced by 2015.
By 2016 Will Broadway won the James Dyson Award for a vaccine cooler based on technology. Many vaccines require cooling to remain active, and the lack of infrastructure to maintain a "cold chain" to reliably bring vaccines to more remote areas in developing countries poses a serious challenge to national immunization programs.
See also
- Cooling
- Cooling cycle
- Ingestion refrigerator
- Rudolf Goldschmidt (for Einstein-Goldschmidt hearing aids)
- Ice Balls
- Linimasa low temperature technology
Note
References
- Einstein, A., L. SzilÃÆ'¡rd, "Cooling" (Appl: 16 December 1927; Priority: Germany, December 16, 1926) US. Patent 1,781,541 , November 11, 1930.
- Einstein, A., L. SzilÃÆ'¡rd, "Companion notes and statements to Pat. No. 1.781.541". Mandeville Special Collection of USC Library. Box 35, Folder 3, 1927; 52 pages.
- Einstein, A., L. SzilÃÆ'¡rd, "Refrigeration Related to Cooling Equipment." (Appl: December 16, 1927 Priority: Germany, December 16, 1926). Patent Number 282.428 (United Kingdom). Finish accept.: November 5, 1928.
External links
- Fridge Einstein Using Without Electricity/No Freon Revived at Oxford
- Flanigan, Allen, " [1] (German site) Wolfgang Engels of Oldenburg University rebuilds its original concept - housing made from concrete, ie the total mass of complete equipment is about 400 kg by 20 kg alcohol in the cooling cycle, The project was completed in 2005.
- US1781541 patent document (European Patent Office)
- GB282428 patent document (European Patent Office)
- How the kerosene cooler works. Archived versions of the page.
Source of the article : Wikipedia
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