A simulation approach for hermetic reciprocating compressors including electrical motor modeling

Dutra, Thiago; Deschamps, César J.

doi:10.1016/j.ijrefrig.2015.07.023

Cited by 38 publications

(13 citation statements)

References 15 publications

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“…Numerical tools can help provide a deep understanding of valve dynamics. The first mathematical model of the reciprocating compressor was developed by Costagliola (1950) [4], which considered the valve dynamics and have been widely applied in the study of reciprocating compressors [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Suction Reed Valve Motion with Sticky Force in a Refrigerator Compressor

Zhang

Xing

et al. 2018

Energies

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The valve motion strongly couples with the differential pressure between the cylinder and the suction and discharge plenum, which has a significant influence on the performance of the refrigerator compressor. To examine the interaction between the pressure and the reed valve motion, this paper presents an experimental investigation into the inner workings of the refrigerator compressor, particularly the p-V diagram and the motion of the suction valve. The refrigerator compressor was modified to conveniently mount the sensors. Three pressure sensors were installed to measure the p-V diagram and pressure pulsation, while a strain gauge was employed to measure the motion of the suction valve. The interaction between the differential pressure and the valve motion were clearly observed from the experimental results. It was found that there was a considerable power loss up to 14.5% in the suction process under experimental conditions. The sticky force of the oil had a significant effect on both the motion of the suction valve and the suction phase of the compressor. The delayed opening of the reed valve increased the amplitude of the pressure pulsation in the suction plenum. The experimental method which integrates the pressure variety and the valve movement proposed in this paper could contribute to the efficient testing and the optimization of the refrigerator compressor.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Suction Reed Valve Motion with Sticky Force in a Refrigerator Compressor

Zhang

Xing

et al. 2018

Energies

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“…Farzaneh-Gord et al [8] constructed a thermodynamic analysis for natural gas reciprocating compressors based on real and ideal gas models. Thiago Dutra et al [9] developed a comprehensive simulation approach for hermetic reciprocating compressors including modeling of the electrical motor. Isacco Stiaccini et al [10] developed a hybrid numerical model to simultaneously carry out the time-domain analysis of the compressor thermodynamic cycle and the frequency-domain acoustic analysis of the pipeline system.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Thermodynamic Process of the Refrigerator Compressor Based on the m-θ Diagram

Wang

Guo³

et al. 2017

Energies

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Abstract:The variation of refrigerant mass in the cylinder of refrigerator compressor has a great influence on the compressor's thermodynamic process. In this paper, the m-θ diagram, which represents the variation of refrigerant mass in compressor cylinder (m) and the crank angle (θ), is proposed to investigate the thermodynamic process of the refrigerator compressor. Comparing with the traditional pressure-Volume (p-V) indicator diagram, the refrigerant's backflow trigged by the delayed closure of valve can be clearly expressed in the m-θ diagram together with the mass flow rate. A typical m-θ diagram was obtained by experimental and theoretical investigations. To improve the thermodynamic model of the compressor, a 3D fluid-structure interaction (FSI) FEA model has been introduced to find out the effective flow area of the valves. Based on the m-θ diagram, the effect of rotating speed on the backflow through the valve, which depends on the movement of the valve, has been investigated. Specific to the compressor used in this study, the maximum backflow through the suction valve and discharge valve occur at 3500 r·min −1 and 5500 r·min −1 , respectively.

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“…They are often used in combination with different tools, e.g. one dimensional model for suction/discharge line [3], thermal model [4] or electrical model of motor [5]. One of the problem is that these models must be experimentally calibrated for specific type of machine, which reduces the universality for all compressors.…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of mathematical model for small air compressor

et al. 2017

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Abstract. Development process of reciprocating compressors can be simplified by using simulation tools. Modelling of a compressor requires a trade-off between computational effort and accuracy of desired results. This paper presents experimental validation of the simulation tool, which can be used to predict compressor behaviour under different working conditions. The mathematical model provides fast results with very good accuracy, however the model must be calibrated for a certain type of compressor. Small air compressor was used to validate an in-house simulation tool, which is based on mass and energy conservation in a control volume. The simulation tool calculates pressure and temperature history inside the cylinder, valve characteristics, mass flow and heat losses during the cycle of the compressor. A test bench for the compressor consisted of pressure sensors on both discharge and suction side, temperature sensor on discharge side and flow meter with calorimetric principle sensor.

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A simulation approach for hermetic reciprocating compressors including electrical motor modeling

Cited by 38 publications

References 15 publications

Investigation on the Suction Reed Valve Motion with Sticky Force in a Refrigerator Compressor

Investigation on the Suction Reed Valve Motion with Sticky Force in a Refrigerator Compressor

Investigation of the Thermodynamic Process of the Refrigerator Compressor Based on the m-θ Diagram

Experimental validation of mathematical model for small air compressor

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