Experience with Small Turbomachinery in a 400 Watt Refrigerator
A refrigerator similar to one of the Fermilab Tevatron satellites was re-configured to use turbomachinery instead of the reciprocating equipment typical of the installations. A Sulzer dry turboexpander, Creare wet turboexpander, and IHI centrifugal cold compressor have been installed and operated for about 8000 hours. Experience was gained both with the rotating machinery and with the refrigerator itself as it interfaced with the load. Equipment was set up to regulate in the same manner as the reciprocating devices had. Heat loads and operating mode were adjusted and evaluations made regarding the behavior of the devices.
Individual equipment performance is described, as well as system behavior and overall integration of the machinery. In particular, attention is paid to the Creare wet turboexpander. This device is operated for the first time as part of a full scale refrigeration system, testing not only its performance at the design point but also its off design characteristics and behavior in transient situations.
KeywordsHelium Liquefaction Refrigeration Turboexpander
Unable to display preview. Download preview PDF.
- 1.J.C. Theilacker, Current operating experience and upgrade plans of the Tevatron cryogenic system, in: “Advances in Cryogenic Engineering,” Vol. 35b, Plenum Press, New York (1990) p. 917.Google Scholar
- 2.W.M. Soyars, Operation and maintenance of Fermilab’s satellite refrigerator expansion engines, to be presented this conference.Google Scholar
- 3.J.D. Fuerst, Selection of cold compressors for the Fermilab Tevatron, in: “Advances in Cryogenic Engineering,” Vol. 39a, Plenum Press, New York (1994), p. 863.Google Scholar
- 4.B.L. Norris, Status report of the Tevation lower temperature upgrade, “Cryogenics” Vol. 34, Butterworth-Heinemann Oxford UK (1994), p. 73.Google Scholar
- 5.H. Sixsmith et al, A miniature wet turboexpander, in: “Advances in Cryogenic Engineering,” Vol. 35, Plenum Press, New York (1990), p. 989.Google Scholar