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The effect of clearance control on the performance of an oil-free linear refrigeration compressor and a comparison between using a bleed flow and a DC current bias

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posted on 2023-06-09, 03:32 authored by Kun LiangKun Liang, Richard Stone, Mike Dadd, Paul Bailey
A moving magnet type oil-free linear compressor has been designed for applications such as electronics cooling. A control system using a solenoid operated valve was developed for DC offset and axial clearance control. Operation of the linear compressor with a fixed clearance of 0.8 mm was compared with a zero DC offset operation. The fixed clearance operation requires a higher power input. The mean piston position can be controlled by using a DC bias on the drive voltage or by using a bleed flow from the compressor body to the suction side of the compressor. Using a DC bias on the drive voltage induces a higher power loss than using a bleed flow when there is a small radial clearance between the piston and cylinder. This provides evidence that the piston control in a refrigeration system with capacity control should be for a zero DC offset using a bleed flow.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

International Journal of Refrigeration

ISSN

0140-7007

Publisher

Elsevier

Volume

69

Page range

407-417

Department affiliated with

  • Engineering and Design Publications

Research groups affiliated with

  • Dynamics, Control and Vehicle Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-10-17

First Open Access (FOA) Date

2017-06-29

First Compliant Deposit (FCD) Date

2016-10-17

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