Zobrazeno 1 - 10
of 26
pro vyhledávání: '"B. P. M. Helvensteijn"'
Autor:
T.I. Mulcahey, Ali Kashani, Jeffrey R. Feller, M.G. Pathak, S. M. Ghiaasiaan, V. C. Patel, B. P. M. Helvensteijn
Publikováno v:
Cryogenics. 58:68-77
The regenerator, typically a microporous structure that is subject to periodic flow of a cryogenic fluid, is the most critical component of Pulse Tube or Stirling cryocoolers, which are widely used for high-demand defense and aerospace applications.
Autor:
T.I. Mulcahey, B. P. M. Helvensteijn, V. C. Patel, Ali Kashani, Jeffrey R. Feller, M.G. Pathak, S. M. Ghiaasiaan
Publikováno v:
AIP Conference Proceedings.
The regenerator, typically a microporous structure that is subject to periodic flow of a cryogenic fluid, is a critical component of pulse tube or Stirling cryocoolers, which are widely used for high-demand aerospace and defense applications. In this
Autor:
B. P. M. Helvensteijn, Pat R. Roach
Publikováno v:
Cryogenics. 39:1015-1019
We have developed a shallow, single-cycle, helium dilution refrigerator that contains rather coarse metal sponge to study the ability to control the location of the liquid helium for microgravity applications. We have tested the refrigerator on the g
Publikováno v:
AIP Conference Proceedings.
Zero boil‐off (ZBO) or reduced boil‐off (RBO) systems that involve active cooling of large cryogenic propellant tanks will most likely be required for future space exploration missions. For liquid oxygen or methane, such systems could be implemen
Autor:
Jeff Feller, G.F. Nellis, B. P. M. Helvensteijn, J. R. Maddocks, Ali Kashani, Louis J. Salerno, Yogesh B. Gianchandani
Publikováno v:
AIAA SPACE 2008 Conference & Exposition.
In future space applications, large and distributed loads will require active thermal control if their lifetimes are to be extended beyond one or two years. Examples include Zero Boil-Off (ZBO) cryogenic systems for exploration missions, and cooling
Autor:
A. Kashani, B. P. M. Helvensteijn, J. R. Feller, L. J. Salerno, P. Kittel, J. G. Weisend, John Barclay, Susan Breon, Jonathan Demko, Michael DiPirro, J. Patrick Kelley, Peter Kittel, Arkadiy Klebaner, Al Zeller, Mark Zagarola, Steven Van Sciver, Andrew Rowe, John Pfotenhauer, Tom Peterson, Jennifer Lock
Publikováno v:
AIP Conference Proceedings.
Testing regenerators presents an interesting challenge. When incorporated into a cryocooler, a regenerator is intimately coupled to the other components: expander, heat exchangers, and compressor. It is difficult to isolate the performance of any sin
Autor:
B. P. M. Helvensteijn, S. W. VanSciver
Publikováno v:
Review of Scientific Instruments. 61:1127-1130
The design and operating characteristics of a fully differential pressure transducer are described. The device is intended for use with He II heat transfer experiments where it operates in vacuum and at low temperatures (T
Autor:
J. R. Maddocks, G. F. Nellis, G. L. Rhoads, B. P. M. Helvensteijn, S. A. Potratz, A. Kashani, B. Flake
Publikováno v:
AIP Conference Proceedings.
This paper describes progress towards the development of a large‐capacity, single‐stage, Stirling‐type, pulse‐tube refrigerator (PTR) for high temperature superconducting power applications. Specifically, the design and fabrication of an expe
Autor:
B. P. M. Helvensteijn, J. R. Maddocks, G. L. Rhoads, D. W. Hoch, J. A. Corey, E. L. James, G. F. Nellis, A. Kashani
Publikováno v:
AIP Conference Proceedings.
A completely oil‐free compressor for use with GM cryocoolers has been designed, built, and tested. The compressor uses two, fully‐balanced, STAR linear motors together with friction‐free reed valves. This arrangement eliminates all possibility
Publikováno v:
Cryocoolers 13 ISBN: 9780387239019
A new compressor for Gifford-McMahon (G-M) cryocooler service has been designed and built using twin Clever Fellows Innovation Consortium (CFIC) STAR linear motors and special friction-free reed valves compatible with oil-free service. This fully-bal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2eff05af0a1903dd15bc579b3e0d084d
https://doi.org/10.1007/0-387-27533-9_29
https://doi.org/10.1007/0-387-27533-9_29