Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Guenter Thummes"'
Improvement strategies for a low input power 4 K pulse tube cooler: Experiments and sage simulations
Autor:
Jack-André Schmidt, Bernd Schmidt, Dirk Dietzel, Jens Falter, Guenter Thummes, André Schirmeisen
Publikováno v:
Cryogenics. 122:103417
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b5b0bce42c6d2e0eb20beb81154d2a4
https://doi.org/10.1016/j.cryogenics.2021.103417
https://doi.org/10.1016/j.cryogenics.2021.103417
Publikováno v:
Cryogenics. 81:8-13
For the numerical simulation of GM-type pulse tube cryocoolers (GMPTCs), several compressors with different input powers were characterised under static conditions, including their mass flow, input power, discharge and suction pressures. Based on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90129bd0dd7b2aa57244398eaa314180
https://doi.org/10.1016/j.cryogenics.2016.11.002
https://doi.org/10.1016/j.cryogenics.2016.11.002
Publikováno v:
Cryogenics. 81:100-106
A simplified model to characterise a rotary valve is proposed. This model is used inside a complete GM-type pulse tube cryocooler (GMPTC) simulation including the compressor, rotary valve and cold head. The verification of the model is presented incl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::258d1201664c058dda4ecab4ff92cd1e
https://doi.org/10.1016/j.cryogenics.2016.11.006
https://doi.org/10.1016/j.cryogenics.2016.11.006
Autor:
Jack-Andre Schmidt, Bernd Schmidt, Guenter Thummes, Dirk Dietzel, Jens Falter, André Schirmeisen, Stefano Spagna
Publikováno v:
Cryogenics. 108:103085
We report on the intrinsic mechanical vibrations and thermal oscillations of a small-scale two-stage pulse tube cryocooler operated by an inverter driven helium compressor. The combination offers a cooling power ranging from 35 to 156 mW at 4.0 K wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::419b3e51a557ccd198d9654d2858d40e
https://doi.org/10.1016/j.cryogenics.2020.103085
https://doi.org/10.1016/j.cryogenics.2020.103085
Publikováno v:
Journal of Zhejiang University-SCIENCE A. 16:577-585
The operating characteristics are important for design and optimization of pulse tube cryocoolers, in particular for those with high cooling power, which up to now have been seldom extensively investigated. In this study, the dependence of cooling pe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d034682486241be5b0218ab6677c6bb1
https://doi.org/10.1631/jzus.a1500057
https://doi.org/10.1631/jzus.a1500057
Autor:
Guenter Thummes, Luwei Yang
Publikováno v:
SPIE Proceedings.
After an introductory section on pulse tube cryocoolers (PTC) this paper reports the state of development of some medium-size PTCs for potential future replacement of commercial Stirling cold fingers. The coolers were designed for operation with the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9d5947144fc5b29baf7bd2480f4e974
https://doi.org/10.1117/12.451050
https://doi.org/10.1117/12.451050
Autor:
Guenter Thummes, Luwei Yang
Publikováno v:
AIP Conference Proceedings.
We have designed and constructed two medium-size U-shaped pulse tube coolers for potential future replacement of Stirling cold fingers. The pressure oscillation in the coolers is generated by means of commercial linear compressors (Leybold Polar or A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::421147fbb17a6549d34e852d6c3cd238
https://doi.org/10.1063/1.1472090
https://doi.org/10.1063/1.1472090
Publikováno v:
SPIE Proceedings.
Pulse tube coolers operate without any moving solid parts inside the cold finger. This feature promises higher reliability, lower vibrations, and lower production cost, when compared to conventional Stirling coolers. We have designed and constructed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5feb120fe4a129ca400c154e2d84ee2f
https://doi.org/10.1117/12.409881
https://doi.org/10.1117/12.409881
Publikováno v:
Advances in Cryogenic Engineering ISBN: 9781475790498
Systematic investigations towards performance improvement of a two-stage 4 K pulse tube cooler, concerning structural parameters, staging configuration and compressor input power, are presented in this paper. Theoretical analysis and experiment revea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::288022e3bcbc24708e1fe7270c5b68a5
https://doi.org/10.1007/978-1-4757-9047-4_259
https://doi.org/10.1007/978-1-4757-9047-4_259
Autor:
Guenter Thummes, Markus Dr. Vester, W. Renz, F. Steinmeyer, C. Heiden, K. Klundt, C. Lienerth
Publikováno v:
Advances in Cryogenic Engineering ISBN: 9781475790498
We report on the first operation of a YBCO receiving antenna for magnetic resonance imaging by use of a specially designed double-inlet pulse tube refrigerator. The pressure oscillation in the cooler is generated by means of a rotary valve in combina
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d12c941ff50719bb2d5ba42e93ce802
https://doi.org/10.1007/978-1-4757-9047-4_263
https://doi.org/10.1007/978-1-4757-9047-4_263