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Numerical simulation of CO2 scroll compressor in transcritical compression cycle

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Abstract

Based on the theory of thermodynamics and kinetics, the mathematical model of an orbiting scroll was established and the stress deformations were employed by ANSYS software. Under the action of pressure load, the results show that the serious displacement part is located in the center of the gear head and the maximum deformation is about 7.33 μm. The maximum radial displacement is about 4.42 μm. The maximum radial stress point occurs in the center of the gear head and the maximum stress is about 40.9 MPa. The maximum axial displacement is about 2.31 μm. The maximum axial stress point occurs in the gear head and the maximum stress is about 44.7 MPa. Under the action of temperature load, the results show that the serious deformation part is located in the center of the gear head and the maximum deformation is about 6.3 μm. The maximum thermal stress occurs in the center of the gear head and the maximum thermal stress is about 86.36 MPa. Under the combined action of temperature load and pressure load, the results show that the serious deformation part and the maximum stress are located in the center of the gear head, and the value are about 7.79 μm and 74.19 MPa, respectively.

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Abbreviations

F :

force (N)

h :

height of vortex circle (mm)

θ :

turn angle of crankshaft (rad)

P :

pressure (MPa)

ρ :

density (kg/m3)

t :

temperature (°C)

T :

temperature (K)

θ :

involute angle (rad)

α :

initial angle (rad)

γ :

radius of circle (mm)

Ex :

elastic ratio

μ :

Poisson ratio

δ :

slab thickness(mm)

s :

suction

d :

exhaust

a :

axial direction

t :

tangential direction

r :

radial direction

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Acknowledgements

The authors acknowledge the support by the natural science foundation of Hebei Province (E2015209239), the support by the Science and technology project of Hebei Province (15214317) and the support of North China University of Science and Technology Fund (SP201306).

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Correspondence to Hongli Wang.

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Wang, H., Tian, J., Du, Y. et al. Numerical simulation of CO2 scroll compressor in transcritical compression cycle. Heat Mass Transfer 54, 1395–1403 (2018). https://doi.org/10.1007/s00231-017-2239-5

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  • DOI: https://doi.org/10.1007/s00231-017-2239-5

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