Transient Thermodynamic Modeling of a Scroll Compressor Using R22 Refrigerant

Sung, Jai Pyo; Boo, Joon Hong; Jung, Eui Guk

doi:10.3390/en13153911

Cited by 11 publications

(3 citation statements)

References 18 publications

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“…Literature [11] constructed a thermodynamic model of an oil-free compressor, using the Euler method to solve the variation laws of various performance parameters in the compression chamber, developed variable speed performance testing, and analyzed the impact of heat transfer and leakage on performance parameters. Literature [12,13] established transient performance analysis models and thermodynamic models for leakage areas based on the thermodynamic principles and geometric shapes of vortex compressors. Stevanovic [14] and others focused on the performance and reliability issues of vortex compressors, where a numerical model of the rotor-bearing-frame system was established through the coupling of the Reynolds equation, rotor dynamics equations, and frame flexibility equations, optimizing the profile of the vortex compressor.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Tangential Leakage Flow Characteristics in a Variable Diameter Dual Circular Arc Vortex Compressor

Huang,

Qiu,

Wang

et al. 2024

Applied Sciences

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(1) To address issues such as a low compression ratio and severe leakage in uniform wall thickness vortex compressors, this paper adopts a new scroll compressor model with a variable diameter double arc combined profile, which has a larger pressure ratio and smaller leakage than the scroll compressor with equal wall thickness that can bring new ideas and methods to the research in the field of scroll compressors. (2) This paper determines the theoretical equation of the variable diameter dual circular arc vortex profile and the combined profile, and infers mathematical models for the leakage line length, working chamber volume, and gas leakage per unit rotation angle of the vortex compressor, followed by simulation. (3) The results show that compared to the uniform wall thickness involute profile, the variable diameter dual circular arc combined profile model reduces the leakage line length by 25%, increases the average total pressure at the working chamber outlet by 2.38%, and decreases the leakage amount by 3.2%, consistent with theoretical analysis. (4) The tangential leakage caused by the radial gap in the variable diameter dual circular arc combined profile model has a significant impact on the uneven distribution of temperature and velocity fields in the working chamber of the vortex compressor, but a smaller impact on the pressure field.

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Section: Introductionmentioning

confidence: 99%

Analysis of Tangential Leakage Flow Characteristics in a Variable Diameter Dual Circular Arc Vortex Compressor

Huang,

Qiu,

Wang

et al. 2024

Applied Sciences

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“…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%

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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“…Many works on scroll compressors or expanders use a mathematical model that is generally virtualised with a low-level programming language. Among them, some use a geometrical approach [11][12][13][14][15] while others use semi-empirical methods [16][17][18]. Some details of one work for each group are briefly illustrated below.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Validation of an Oil Free Scroll Compressor

Cardone

Gargiulo

2020

Energies

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This paper presents a virtual model of a scroll compressor developed on the one-dimensional analysis software Simcenter Amesim®. The model is semi-empirical: it needs some physical details of the modelled machine (e.g., the cubic capacity), but, on the other hand, it does not require the geometrical features of the spirals, so it needs experimental data to calibrate it. The model also requires rotational speed and the outlet temperature as boundary conditions. The model predicts the power consumption and the mass flow rate and considers leakages and mechanical losses. After the model presentation, this paper describes the test bench and the obtained data used to calibrate and validate the model. At last, the calibration process is described, and the results are discussed. The calculated values fit the experimental data also in extrapolation, despite the model is simple and performs calculations within 7 s. Due to these characteristics, the model is suitable for being used in a larger model as a sub-component.

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Transient Thermodynamic Modeling of a Scroll Compressor Using R22 Refrigerant

Cited by 11 publications

References 18 publications

Analysis of Tangential Leakage Flow Characteristics in a Variable Diameter Dual Circular Arc Vortex Compressor

Analysis of Tangential Leakage Flow Characteristics in a Variable Diameter Dual Circular Arc Vortex Compressor

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

Numerical Simulation and Experimental Validation of an Oil Free Scroll Compressor

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