# Achievement of 120 W at 80 K by Synchronous Operation of Two Single-Stage G-M Cold Heads Driven by a 2 W Class Compressor

https://mdr.nims.go.jp/datasets/16652164-efab-45df-98f9-f63f6aa9840c

## File

- [ICC23_Masuyama.pdf](https://mdr.nims.go.jp/filesets/f5c6b385-dec1-4777-a9a7-c4724707f2e7/download) ([Detail](https://mdr.nims.go.jp/filesets/f5c6b385-dec1-4777-a9a7-c4724707f2e7.md))

## Id

16652164-efab-45df-98f9-f63f6aa9840c

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## Visibility

open_to_public

## State

published

## Created at

2024-12-13T06:02:28.737834Z

## Updated at

2024-12-19T07:30:51.196246Z

## Published at

2024-12-19T07:30:51.274977Z

## Doi



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## Resource type

conference_paper

## Manuscript type

vor

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## Title

- title: Achievement of 120 W at 80 K by Synchronous Operation of Two Single-Stage
    G-M Cold Heads Driven by a 2 W Class Compressor
  title_type: original
  lang: en

## Description

- description: In order to improve the cooling capacity and efficiency of a Gifford-McMahon
    (G-M) cryocooler, the synchronous operation of two single-stage G-M cold heads
    driven by a 2 kW class compressor was experimentally investigated. The pair of
    flexible hoses was branched into two pairs near the compressor, and then two pairs
    of hoses, each 10 m long, were connected to each cold head. Two synchronous modes,
    in-phase and reverse phase, were carried out. In the in-phase mode, two vertically
    moving displacers of the G-M cold heads reach top and bottom dead center simultaneously.
    In the reverse phase mode, when one of the displacers reaches top dead center,
    the other simultaneously reaches bottom dead center, and vice versa. The experimental
    results showed that two synchronous modes had almost the same cooling capacity
    in the measured temperature range. The cooling capacity achieved at 80 K was 123
    W, which was 1.4 times larger than that of a single cold head operated with the
    same compressor. The relative Carnot efficiency was calculated to be 16%. These
    results prove that synchronous operation of two G-M cold heads is highly efficient
    at the temperature of liquid nitrogen.
  description_type: abstract
  lang: eng

## Creator

- name: S. Masuyama
  role: author
  organization: National Institute of Technology, Oshima College
- name: K. Natsume
  role: author
  orcid: https://orcid.org/0000-0003-3949-6923
  organization: National Institute for Materials Science
  department: Research Center for Energy and Environmental Materials (GREEN)/Hydrogen
    Technology Materials Field/Magnetic Refrigeration System Group
- name: K. Kamiya
  role: author
  orcid: https://orcid.org/0000-0002-6765-4485
  organization: National Institute for Materials Science
  department: Research Center for Energy and Environmental Materials (GREEN)
- name: T. Numazawa
  role: author
  orcid: https://orcid.org/0000-0003-1828-4972
  organization: NIMS

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## Keyword

- subject: G-M
  schema: not_defined
- subject: synchronous operation
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

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## Data origin

- data_origin_type: other

## Embargo



## Journal



## Conference

name: Cryocoolers 23
start_date: 2024-06-03
end_date: 2024-06-06
identifier: https://cryocooler.org/page-18263

## Related item



## Funding

- identifier: JPMJMI18A3
  funder_name: JST未来社会創造事業　大規模プロジェクト型

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## Fileset

- id: f5c6b385-dec1-4777-a9a7-c4724707f2e7
  filename: ICC23_Masuyama.pdf
  content_type: application/pdf
  size: 675505
  md5: c9e8a7b72ab18736b3456b7f109806b1

## Thumbnail

fileset_id: f5c6b385-dec1-4777-a9a7-c4724707f2e7
filename: ICC23_Masuyama.pdf