NEON TURBO-BRAYTON CYCLE REFRIGERATOR FOR HTS POWER MACHINES

被引：12
|
作者：
Hirai, H. [1 ]
Hirokawa, M. [1 ]
Yoshida, S. [1 ]
Nara, N. [1 ]
Ozaki, S. [1 ]
Hayashi, H. [2 ]
Okamoto, H. [2 ]
Shiohara, Y. [3 ]
机构：
[1] Taiyo Nippon Sanso Corp, Tokyo 1428558, Japan
[2] Kyusyu Elect Power Co Inc, Fukuoka 8158520, Japan
[3] ISTEC, Supercond Res Lab, Tokyo 1350062, Japan
来源：
ADVANCES IN CRYOGENIC ENGINEERING, VOLS 57A AND 57B | 2012年 / 1434卷
基金：
日本科学技术振兴机构;
关键词：
Brayton-cycle; refrigerator; refrigeration process; turbo-expander; turbo-compressor; High Temperature Superconductor;
D O I：
10.1063/1.4707100
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We developed a prototype turbo-Brayton refrigerator whose working fluid is neon gas. The refrigerator is designed for a HTS (High Temperature Superconducting) power transformer and its cooling power is more than 2 kW at 65 K. The refrigerator has a turbo-expander and a turbo-compressor, which utilize magnetic bearings. These rotational machines have no rubbing parts and no oil-components. Those make a long maintenance interval of the refrigerator. The refrigerator is very compact because our newly developed turbo-compressor is volumetrically smaller than a displacement type compressor in same operating specification. Another feature of the refrigerator is a wide range operation capability for various heat-loads. Cooling power is controlled by the input-power of the turbo-compressor instead of the conventional method of using an electric heater. The rotational speed of the compressor motor is adjusted by an inverter. This system is expected to be more efficient. We show design details, specification and cooling test results of the new refrigerator in this paper.
引用
收藏
页码：1672 / 1679
页数：8
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