The pulse tube refrigerator (PTR) or pulse tube cryocooler is a developing technology that emerged largely in the early 1980s with a series of other innovations in the broader field of thermoacoustics. In contrast with other cryocoolers (e.g. Stirling cryocooler and Gifford-McMahon cooler), this cryocooler can be made without moving parts in the low temperature part of the device, making the cooler suitable for a wide variety of applications.
Read more about Pulse Tube Refrigerator: Uses, Description, How It Operates, Performance, Comparison With Other Coolers, History, Types of Pulse-tube Refrigerators, Prospects, See Also
Famous quotes containing the words pulse, tube and/or refrigerator:
“Whoever has had the experience of the moral sentiment cannot choose but believe in unlimited power. Each pulse from that heart is an oath from the Most High. I know not what the word sublime means, if it be not the intimations, in this infant, of a terrific force.”
—Ralph Waldo Emerson (1803–1882)
“The last best hope of earth, two trillion dollars in debt, is spinning out of control, and all we can do is stare at a flickering cathode-ray tube as Ollie “answers” questions on TV while the press, resolutely irrelevant as ever, asks politicians if they have committed adultery. From V-J Day 1945 to this has been, my fellow countrymen, a perfect nightmare.”
—Gore Vidal (b. 1925)
“I hate to do what everybody else is doing. Why, only last week, on Fifth Avenue and some cross streets, I noticed that every feminine citizen of these United States wore an artificial posy on her coat or gown. I came home and ripped off every one of the really lovely refrigerator blossoms that were sewn on my own bodices.”
—Carolyn Wells (1862–1942)