Internal flow field and heat transfer investigation inside the working chamber of a scroll compressor

Rak, Józef; Pietrowicz, Sławomir

doi:10.1016/j.energy.2020.117700

Cited by 23 publications

(13 citation statements)

References 20 publications

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“…In stage 4, the projected area of discharge chamber section ddd1 can be obtained according to A ddd1 = A O,ddd1 − A I,ddd1 shown in Figure 5. A O,ddd1 , the sector type region, is expressed in Equation (35). The volume of V O,ddd1 was calculated according to Equation (37).…”

Section: Outer Area a O D1mentioning

confidence: 99%

“…The development of geometry theory contributes to the scroll machine predesign accuracy and efficiency [27]. Further, to evaluate the performance of the predesigned prototype, several types of research approaches have been adapted including experiments [28,29], thermodynamic modeling [30,31], and CFD simulation modeling of dimensions 1D [32,33], 2D [34,35], and 3D [36,37]. Due to the nonignorable consumption of time and experimental materials, researches of scroll machine experiments were very few.…”

Section: Introductionmentioning

confidence: 99%

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An Improved Geometric Theoretical Model and Throughflow Prediction Method for a CO2 Scroll Compressor of Automotive Air Conditioning System

Song

et al. 2023

International Journal of Energy Research

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The scroll-type compressor is the core component of the refrigeration system using the natural refrigerant carbon dioxide. An accurate scroll geometric theoretical model is essential for evaluating and enhancing compressor performance. The present paper proposed and validated an improved geometric theoretical model of a scroll compressor. A vector triangle method-based general piecewise function describes precisely the volume variation of the working chambers, based on which the transient throughflow modeling and performance evaluation of a carbon dioxide scroll compressor were conducted. The mechanisms and influencing factors of the suction precompression and the asymmetry discharging were analyzed. The results indicate that the strength of the suction precompression is mainly influenced by the suction vacuum under different rotating speeds, partly associated with the tangential leakage under low rotating speeds. The increasing initial suction pressure contributes to the linear raising of the pressure difference between suction initial and ending pressures, decreasing the precompression extension slightly. The variation of the discharge throughflow areas of two symmetric discharge chambers dominates the pressure asymmetry, which is gradually eliminated by the overlapping throughflow area. Compared with the circular discharge structure, the waist-shape port reduces the pressure asymmetry degree and shortens its duration.

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Section: Outer Area a O D1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Improved Geometric Theoretical Model and Throughflow Prediction Method for a CO2 Scroll Compressor of Automotive Air Conditioning System

Song

et al. 2023

International Journal of Energy Research

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show abstract

“…The detailed physics of the transient flow inside the machinery, such as pressure distribution, temperature distribution, velocity distribution, and pre/over-compression, were analysed. A specific numerical grid deformation procedure for the scroll machinery was implemented for heat transfer [59]. Unlike the traditional dynamic mesh strategy mainly depending on equations, the mesh of every time step was regenerated based on a custom scripted block file in ICEM CFD.…”

Section: Scroll Expandermentioning

confidence: 99%

A comprehensive review of micro-scale expanders for carbon dioxide related power and refrigeration cycles

Tian

Pekris

2022

Applied Thermal Engineering

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“…Cavazzini et al [20] combined CFD and PSO (particle swarm optimization) algorithms and found that the radius of gyration, the number of scroll teeth, and the size of the exhaust port all have an impact on the output characteristics of the scroll compressor. Rak et al [21] found that the Nusselt numbers calculated using CFD deviate from the values obtained by the formula due to the consideration of the influence of heat transfer and leakage on the scroll compressor in the calculation process. Giovanna et al [22] found that the selection of the calculation model has an impact on the distribution of the flow field in the compressor chamber, and it also affects the mass flow of the scroll compressor inlet and outlet mass flow; moreover, the k-model is more suitable for scroll machinery.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis and Test Research of PEMFC Oil-Free Positive Displacement Compressor for Vehicle

2021

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In order to study the matching characteristics of the positive displacement air compressor and the PEMFC (proton exchange membrane fuel cells), air supply subsystem, the basic operating performance parameters of the scroll and single-screw air compressors were analyzed with the focus on the oil-free double-wrap scroll compressor. According to the thermodynamic model and three-dimensional unsteady-state numerical simulation, the variation of the temperature, pressure, and velocity was obtained. Besides, under the rated operating condition of the compressor, the inlet and outlet mass flow rate of the fluid in the working chamber with the orbiting angle of the crank was achieved. Based on the built test platform, the actual working process of scroll and screw compressors was analyzed. This study indicates that the volume flow can be significantly increased by improving the speed of the positive displacement compressor. Based on the experimental measurement, when the height of the scroll tooth of the scroll compressor increases by 5 mm, the volume flow of the prototype SC2 increases by 0.17 m3/min and the exhaust temperature is reduced by 13 °C at the rated speed.

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Internal flow field and heat transfer investigation inside the working chamber of a scroll compressor

Cited by 23 publications

References 20 publications

An Improved Geometric Theoretical Model and Throughflow Prediction Method for a CO2 Scroll Compressor of Automotive Air Conditioning System

An Improved Geometric Theoretical Model and Throughflow Prediction Method for a CO2 Scroll Compressor of Automotive Air Conditioning System

A comprehensive review of micro-scale expanders for carbon dioxide related power and refrigeration cycles

Performance Analysis and Test Research of PEMFC Oil-Free Positive Displacement Compressor for Vehicle

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