東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Miniature high frequency pulse tube ...

Fang, Liang.

FindBook

Google Book

Amazon

博客來

Miniature high frequency pulse tube refrigerator: Modeling and experiments.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Miniature high frequency pulse tube refrigerator: Modeling and experiments./
作者:	Fang, Liang.
面頁冊數:	145 p.
附註:	Source: Dissertation Abstracts International, Volume: 67-04, Section: B, page: 2189.
Contained By:	Dissertation Abstracts International67-04B.
標題:	Engineering, Mechanical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR13615
ISBN:	9780494136157

Miniature high frequency pulse tube refrigerator: Modeling and experiments.
Fang, Liang.

Miniature high frequency pulse tube refrigerator: Modeling and experiments. - 145 p.

Source: Dissertation Abstracts International, Volume: 67-04, Section: B, page: 2189.

Thesis (Ph.D.)--University of Calgary (Canada), 2006.

The pulse tube cryocooler represents a relatively recent development in cryogenic technology. It has the potential for high reliability due to the elimination of all moving parts at the low temperature end. The purpose of this study is to obtain better understanding of the refrigeration mechanism and the capability of the pulse tube cryocooler.

ISBN: 9780494136157Subjects--Topical Terms:

783786
Engineering, Mechanical.

Miniature high frequency pulse tube refrigerator: Modeling and experiments.
LDR:02896nmm 2200277 4500 001 1831563
005 20070518124254.5
008 130610s2006 eng d
020 $a 9780494136157
035 $a (UnM)AAINR13615
035 $a AAINR13615
040 $a UnM $c UnM
100 1 $a Fang, Liang. $3 1292344
245 1 0 $a Miniature high frequency pulse tube refrigerator: Modeling and experiments.
300 $a 145 p.
500 $a Source: Dissertation Abstracts International, Volume: 67-04, Section: B, page: 2189.
502 $a Thesis (Ph.D.)--University of Calgary (Canada), 2006.
520 $a The pulse tube cryocooler represents a relatively recent development in cryogenic technology. It has the potential for high reliability due to the elimination of all moving parts at the low temperature end. The purpose of this study is to obtain better understanding of the refrigeration mechanism and the capability of the pulse tube cryocooler.
520 $a The regenerator in the pulse tube cryocooler is subjected to reciprocating viscous flow, which usually results in two insidious effects, namely significant; pressure drop and phase shift. These viscous effects, together with the impedances of other components, ultimately determine how large the enthalpy and work fluxes along the regenerator and how efficient the system will be. To correctly formulate the relationship locally, a model is proposed based on a multiple length scale technique. The key scaling assumption, consistent with a drop to leading order in the pressure amplitude across the regenerator, requires the ratio of the mesh size over the regenerator length to be of the same order as the Mach number squared, divided by the Reynolds number. Under this assumption, and assuming the regenerator is close to isothermal, a complete asymptotically consistent solution to the regenerator problem is formulated.
520 $a In the next step, under the low amplitude limit, a consistent simplified model for the pulse tube cryocooler system is developed. It includes a single partial differential equation for pressure, coupled with an ordinary differential equation for temperature. This simplified problem can easily be solved in Fourier space using the Runge-Kutta method. Different configurations of pulse tube cryocoolers are studied using this model, including the orifice, double-inlet and inertance pulse tube cryocoolers.
520 $a A pulse tube prototype has been designed, built and tuned to meet the cooling need of SKA radio telescope. It achieved a low temperature of 50 K with normal thermal-insulation condition, and a coefficient-of-performance of 1/35 at 80K, which is comparable with Stirling cryocooler.
590 $a School code: 0026.
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0548
710 2 0 $a University of Calgary (Canada). $3 1017619
773 0 $t Dissertation Abstracts International $g 67-04B.
790 $a 0026
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR13615