Performance Enhancement for 4 K Pulse Tube Cryocoolers

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$69,942.00
Award Year:
2010
Program:
STTR
Phase:
Phase I
Contract:
N00014-10-M-0246
Agency Tracking Number:
N10A-026-0151
Solicitation Year:
n/a
Solicitation Topic Code:
NAVY 10T026
Solicitation Number:
n/a
Small Business Information
Creare Inc.
P.O. Box 71, Hanover, NH, 03755
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
072021041
Principal Investigator:
Weibo Chen
Principal Investigator
(603) 643-3800
wbc@creare.com
Business Contact:
James Barry
President
(603) 643-3800
contractsmgr@creare.com
Research Institution:
University of Wisconsin-Madison
Cheryl E Gest
Research and Sponsored Program
21 N. Park St., Suite 6401
Madison, WI, 53715
(608) 262-4880
Nonprofit college or university
Abstract
Future military communication systems will utilize advanced superconductor digital electronics that will require efficient cooling at low temperatures near 4 K. We propose to improve the efficiency of pulse-tube cryocoolers by addressing the two primary performance limitations. These are operation in adverse orientations and performance of the regenerator at low temperatures. We will develop (1) a CFD model to quantify the losses associated with gravity-induced flow; and (2) an advanced regenerator that uses an innovative non-rare-earth material to achieve a very high volumetric specific heat and a novel configuration for high thermal and fluid performance. The regenerator's large heat capacity, small void volume and low flow restriction will substantially improve the thermal efficiency of low temperature pulse-tube cryocoolers. The regenerator significantly increases a cryocooler's net cooling and thus minimizes the impact of parasitic losses in a pulse tube at an adverse gravity orientation. In Phase I, we will analyze the performance of a pulse tube cooler at different gravity orientations, optimize the regenerator design, and identify a fabrication approach for the regenerator.

* information listed above is at the time of submission.

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