Development of a new moving magnet linear compressor. Part B: Performance analysis

Bijanzad, Armin; Hassan, Adnan; Lazoğlu, İsmail; Kerpiççi, Hüsnü

doi:10.1016/j.ijrefrig.2020.01.028

Cited by 9 publications

(1 citation statement)

References 16 publications

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“…However, part load results have not been reported that could be compared to the present rectangular design. A moving magnet design was also proposed by Bijanzad et al [34,35], who demonstrated that the motor efficiency approached 89% when operated under low load condition using nitrogen as working fluid. However, motor efficiency decreased from 0.79 to 0.7 with input power increasing from 30 to 50 W using R600 as working fluid.…”

Section: Comparisons With Other Moving Magnet Linear Motorsmentioning

confidence: 99%

Modelling and Measurement of a Moving Magnet Linear Motor for Linear Compressor

Chen

Jiang

et al. 2020

Energies

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For the purpose of efficiency improvement, a linear motor that performs a linear reciprocating motion can be employed to directly drive the piston in a reciprocating refrigeration compressor without crankshaft mechanism. This also facilitates the modulation of cooling capacity as the stroke and frequency can be readily varied in response to heat load. A novel design of moving magnet linear motor for linear compressor was analyzed in the paper. A finite element analysis (FEA) model was built to simulate the characteristics of the linear motor. Current and displacement signals were measured from a test rig and were defined in the transient FEA model. Transient motor force was simulated with the FEA model and good agreements are shown between the results from the FEA model and interpolated shaft force from static force measurements. Major Losses, such as copper loss and core loss were also computed. Motor efficiency decreased from 0.88 to 0.83 as stroke increased from 9 mm to 12 mm, while the pressure ratio remained unchanged. Comparisons were made between the present moving magnet linear motor and moving coil linear motors. Generally, the moving magnet linear motor demonstrates higher efficiency than moving coil motors, which have significantly higher copper loss. The present moving magnet design with simple structure could be further optimized to improve motor efficiency.

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Section: Comparisons With Other Moving Magnet Linear Motorsmentioning

confidence: 99%