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Compressor Performance Comparison When Using R134 And R1234yf As Working Fluids, Kim Tiow Ooi Jul 2012

Compressor Performance Comparison When Using R134 And R1234yf As Working Fluids, Kim Tiow Ooi

International Compressor Engineering Conference

This paper examines the detailed effects on the compressor performance when using R1234yf as comparedto R134a. Firstly, the effects on the compressor performance of the existing compressors which was designed for R134a when using the new refrigerant R1234yf will be presented and discussed. Secondly, the design aspects of a new compressor to be designed for R1234yf will also be presented and discussed. In the paper the rolling piston compressor was used to carry out the simulation tests. The detailed comparison of various performance parameters for the compressor are discussed and shown.

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Incorporating 3d Suction Or Discharge Plenum Geometry Into A 1d Compressor Simulation Program To Calculate Compressor Pulsations, Jack Sauls, Keith Novak Jul 2012

Incorporating 3d Suction Or Discharge Plenum Geometry Into A 1d Compressor Simulation Program To Calculate Compressor Pulsations, Jack Sauls, Keith Novak

International Compressor Engineering Conference

A 3D calculated impedance transfer matrix method has been developed and demonstrated to provide accurate and efficient prediction of pressure pulsations in positive displacement compressors. The method is easily incorporated into 1D compressor simulation models, where a single impedance matrix, normalized to density and speed of sound, can be used to model all compressor running speeds and operating conditions. The general transfer matrix or “4 pole” method is documented by Bilal, et al (2010) where the hybrid approach used here is also introduced. More recent developments of this method are presented by Novak and Sauls (2012). This paper describes how …

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Under-Compression (Over-Expansion) – An Isochoric Or Adiabatic Process?, Paul Xiubao Huang Jul 2012

Under-Compression (Over-Expansion) – An Isochoric Or Adiabatic Process?, Paul Xiubao Huang

International Compressor Engineering Conference

It has long been established that for a Positive Displacement (PD) compressor or expander such as reciprocating or rotary screw type, the thermodynamic process is adiabatic when compressor or expander discharge pressure is equal to system back pressure (or 100% internal compression or expansion). At this design point, compressor or expander efficiency and noise are most desirable. But more often, PD compressor or expander operates at off-design points where the discharge pressure is either lower or higher than the system back pressure caused by the inherent nature of possessing a fixed built-in volume ratio. The resulting processes are often called …

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Analytical And Cfd Modeling Of The Fluid Flow In An Eccentric-Tube Centrifugal Oil Pump For Hermetic Compressors, Marcus Alves, Jader Barbosa Jr., Alvaro Prata Jul 2012

Analytical And Cfd Modeling Of The Fluid Flow In An Eccentric-Tube Centrifugal Oil Pump For Hermetic Compressors, Marcus Alves, Jader Barbosa Jr., Alvaro Prata

International Compressor Engineering Conference

A model is presented for calculating the volume flow rate in an eccentric-tube centrifugal oil pump for reciprocating compressors. The oil pump assembly consists of a pick-up tube with an inclined inlet that is mounted off-center with the crankshaft symmetry axis. The pick-up tube is connected to the shaft channel; a helical groove machined on the crankshaft that facilitates the supply of lubricant to the bearings. The analytical models for the pick-up tube and shaft channel were developed independently and were coupled via a numerical procedure to determine the steadystate volume flow rate in the assembly. The steady-state results were …

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An Experimental Study Of Refrigerant Desorption From A Refrigerant-Oil Mixture Subjected To Rapid Depressurization, Fabio Fortkamp, Moises Marcelino Neto, Jader Barbosa Jr. Jul 2012

An Experimental Study Of Refrigerant Desorption From A Refrigerant-Oil Mixture Subjected To Rapid Depressurization, Fabio Fortkamp, Moises Marcelino Neto, Jader Barbosa Jr.

International Compressor Engineering Conference

This paper deals with the experimental assessment of refrigerant desorption leading to foam formation in R-134a/POE oil mixtures undergoing controlled depressurization. An experimental apparatus was designed and constructed to allow measurements of pressure drop rate, foam height and refrigerant gas mass flux resulting from decompression and desorption from a saturated liquid mixture. High-speed video recording of the phenomenon enabled the identification of three main periods during the depressurization/foaming process, namely, depressurization without cavitation, vapor flashing and rapid foam growth, and foam layer decay. The experimental results for the maximum foam height, foam lifetime and liquid supersaturation during desorption were explored …

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Modeling The Stiction Effect In Automatic Compressor Valves, Rodrigo Adrian Pizarro-Recabarren, Jader Barbosa Jr., Cesar J. Deschamps Jul 2012

Modeling The Stiction Effect In Automatic Compressor Valves, Rodrigo Adrian Pizarro-Recabarren, Jader Barbosa Jr., Cesar J. Deschamps

International Compressor Engineering Conference

The so-called stiction effect (or stiction force) is one of the sources of thermodynamic losses in compressor suction and discharge systems. The losses associated with the stiction effect are caused by a deformation of the lubricating oil film between the valve and the seat. This generates a delay in the valve opening, since larger pressure differencesbetween the cylinder and the discharge and/or suction chambers are needed to compensate for those effects. This paper advances a theoretical model for solving the dynamic behavior of a ring-shaped lubricant oil film between a discharge valve and the seat. The valve is allowed to …

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A Heat Transfer Model Combining Differential And Integral Formulations For Thermal Analysis Of Reciprocating Compressors, Joel Sanvezzo Jr, Cesar J. Deschamps Jul 2012

A Heat Transfer Model Combining Differential And Integral Formulations For Thermal Analysis Of Reciprocating Compressors, Joel Sanvezzo Jr, Cesar J. Deschamps

International Compressor Engineering Conference

Heat transfer in hermetic compressors is a complex phenomenon strongly affected by fluid flow inside and outside the compression chamber and by the efficiency of both the electrical motor and the crankshaft mechanism. This paper presents a heat transfer model for thermal analysis of reciprocating compressors formed by combining a lumped formulation for convective heat transfer in some selected regions and a three-dimensional differential formulation for heat conduction in the solid components. Convective heat transfer coefficients were evaluated from correlations available in the literature so as to avoid calibration based on experimental data. The model was applied to a reciprocating …

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A Low Friction Thrust Bearing For Reciprocating Compressors, Shuhei Nagata, Hirokatsu Kousokabe, Nobuya Sekiyama, Toshiaki Ono Jul 2012

A Low Friction Thrust Bearing For Reciprocating Compressors, Shuhei Nagata, Hirokatsu Kousokabe, Nobuya Sekiyama, Toshiaki Ono

International Compressor Engineering Conference

A thrust bearing with a micro texture on its sliding surface that produces hydrodynamic pressure was developed for use in reciprocating compressors. Evaluation using an elemental friction test showed that its friction loss was 20–60 % lower than that of the current design. Measurement of the efficiency of a compressor with the developed thrust bearing showed that the coefficient of performance was 1.4 % higher than that of a compressor with a conventional thrust bearing.

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Influence Of Thermal Deformation On The Characteristic Diagram Of A Screw Expander In The Automotive Application Of Exhaust Heat Recovery, Alexander Nikolov, Christopher Huck, Andreas Brümmer Jul 2012

Influence Of Thermal Deformation On The Characteristic Diagram Of A Screw Expander In The Automotive Application Of Exhaust Heat Recovery, Alexander Nikolov, Christopher Huck, Andreas Brümmer

International Compressor Engineering Conference

The present paper responds to the operating behavior of an exemplarily selected screw expander for exhaust heat recovery from combustion engines in the lower power range. The application in vehicles for the purpose of heat recovery, which is characterized by the small machine dimensions due to relatively low system mass flows, is a still unexplored area for the screw-type machine. The screw expander is to be used in an organic Rankine cycle (ORC). Compared to other expander designs in general screw expanders are characterized by high efficiency together with relatively low geometrical dimensions. Within the presented investigation mainly the performance …

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Experimental Testing Of Oil-Flooded Hermetic Scroll Compressor, Ian H. Bell, Eckhard A. Groll, James E. Braun, W. Travis Horton Jul 2012

Experimental Testing Of Oil-Flooded Hermetic Scroll Compressor, Ian H. Bell, Eckhard A. Groll, James E. Braun, W. Travis Horton

International Compressor Engineering Conference

In this work, a residential air conditioning compressor designed for vapor injection has been modified in order to inject large quantities of oil into the working chamber in order to approach an isothermal compression process. For a range of different oil injection scenarios, the result is a monotonic decrease in compressor discharge temperature as the oil injection rate is increased. In addition, the pumped refrigerant mass flow rate tends to increase as the oil injection rate is increased.

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Performance Optimization Of Screw Compressors Based On Numerical Investigation Of The Flow Behaviour In The Discharge Chamber, Maria Pascu, Ahmed Kovacevic, Nsikan Udo Jul 2012

Performance Optimization Of Screw Compressors Based On Numerical Investigation Of The Flow Behaviour In The Discharge Chamber, Maria Pascu, Ahmed Kovacevic, Nsikan Udo

International Compressor Engineering Conference

In the field of screw compressors, although the basic operation of such flow systems is well known and the analytical methods for their performance prediction are well established, only few attempts of investigating the flow in screw compressors by means of CFD can be identified in the available literature. The present paper aims at contributing to this field by establishing CFD as permanent tool for compressor design and optimization during the new product development process at a screw compressor manufacturer.The major challenges during this process related to the implementation of a valid meshing technique, as this is a far more …

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An Experimental And Numerical Analysis Of Refrigerant Flow Inside The Suction Muffler Of Hermetic Reciprocating Compressor, Dr. Kemal Sarioglu, Ahmet Refik Ozdemir, Emre Oguz, Atilla Kaya Jul 2012

An Experimental And Numerical Analysis Of Refrigerant Flow Inside The Suction Muffler Of Hermetic Reciprocating Compressor, Dr. Kemal Sarioglu, Ahmet Refik Ozdemir, Emre Oguz, Atilla Kaya

International Compressor Engineering Conference

In this study, detailed temperature and pressure measurements were performed at the inlet, outlet and outer boundaries of the suction muffler of a hermetic reciprocating compressor. The measurements were conducted without effecting real phenomena. After experimental studies, detailed computational fluid dynamic analysis of the refrigerant flow (isobutane) in the suction muffler was performed. Experimental pressure and temperature values at the inlet, outlet and outer boundaries of the suction muffler were used as boundary conditions. The effect of suction valve (opening and closing) at the exit of the suction muffler has been considered. 3- dimensional time dependent calculations were completed when …

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Improvement Of Abnormal Wear Between The Vane-Slot And Vane In Rotary Compressor, Bo Huang, Guoqiang Gao Jul 2012

Improvement Of Abnormal Wear Between The Vane-Slot And Vane In Rotary Compressor, Bo Huang, Guoqiang Gao

International Compressor Engineering Conference

The reason for the abnormal wear between the vane-slot and the vane in the rotary compressor is analyzed in this paper. Firstly, the influence of lubrication at the clearance, the machining equipment accuracy and oil circulation (oil flow rate) is analyzed. Then the material characteristics including the hardness of the vane and vane-slot, the surface treatment of the vane and the deformation of the vane-slot after welding are discussed. After we find the main correlating factors, we will examine the results from the experiments. Eventually, problem of the abnormal wear is solved by inducing an innovative oil circulation.

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A Simplified Cfd Model For Simulation Of The Suction Process Of Reciprocating Compressors, Evandro L. L. Pereira, Claudio J. Santos, Cesar J. Deschamps, Rodrigo Kremer Jul 2012

A Simplified Cfd Model For Simulation Of The Suction Process Of Reciprocating Compressors, Evandro L. L. Pereira, Claudio J. Santos, Cesar J. Deschamps, Rodrigo Kremer

International Compressor Engineering Conference

The suction process in reciprocating compressors is strongly affected by the valve dynamics and the pulsating flow throughout the suction muffler. This paper describes a simplified computational fluid dynamics (CFD) model to simulate the flow through the muffler, suction valve and a small region inside the cylinder. The proposed method is applied to predict the suction process of a small reciprocating compressor and its adequacy is compared with a more time elaborate model in terms of accuracy, computation cost and usability.

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Performance Investigation Of Linear Compressor With One Side Springs, Huiming Zou, Shuangquan Shao, Mingsheng Tang, Liqin Zhang, Guohong Peng Jul 2012

Performance Investigation Of Linear Compressor With One Side Springs, Huiming Zou, Shuangquan Shao, Mingsheng Tang, Liqin Zhang, Guohong Peng

International Compressor Engineering Conference

In this paper a linear compressor prototype with a set of cylindrical coil springs connected to one side of the trestle is developed. The initial position of piston head is near to the top dead center and coil springs are on free status. The experiments on the prototype are carried out by compressing air on different working conditions. The experimental results show that the linear compressor with one side springs can take good advantage of the gas springcharacteristics of the compressed work fluid to reduce the stiffness of mechanical spring and the weight of compressor. However the mechanical springs cannot …

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A Rotary Compressor-Accumulator Component Simulation Model In Consideration Of (±) Suction Gas Superheat Degrees, Ke-Jia Ye, Hong Tao, Jun Yang, Chun-Hui Liu Jul 2012

A Rotary Compressor-Accumulator Component Simulation Model In Consideration Of (±) Suction Gas Superheat Degrees, Ke-Jia Ye, Hong Tao, Jun Yang, Chun-Hui Liu

International Compressor Engineering Conference

On the basis of the classic ARI compressor model, the mass flow-rate and input power were corrected with the level of suction gas superheat, especially the superheat degrees below zero. refrigerant dissolved in the oil pool, at the discharge pressure and the oil temperature, was calculated by means of the estimation model for refrigerant/oil mixture properties. An accumulator mechanism model was linked to this compressor model to build up a compressor-accumulator component model, which was solved out by the simultaneous modular algorithm. The component model can afford more details about the performance of rotary compressor and refrigerant distribution, furthermore, can …

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Use Of New Generation Instruments In Measurement Of New Steam Expander, Ashvin Dhunput, Ian K. Smith, Nikola Stosic, Ahmed Kovacevic Jul 2012

Use Of New Generation Instruments In Measurement Of New Steam Expander, Ashvin Dhunput, Ian K. Smith, Nikola Stosic, Ahmed Kovacevic

International Compressor Engineering Conference

For the past twenty years the Centre for Positive Displacement Compressor Technology, at City University, has employed experimental techniques for the measurement of screw compressors’ performance where both experimental data and predicted mathematical models are found to be in agreement with each other. Some of the experimental measuring techniques involve the use of pressure and temperature transducers installed in the housing to determine the vital thermodynamic process characteristics and functioning performance of compressors. Moreover, as advanced technologies were available, measurements were performed in an optical compressor with a transparent window near the discharge port to allow the application of a …

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R32 Compressor For Air Conditioning And Refrigeration Applications In China, Weihua Guo, Gaofeng Ji, Honghong Zhan, Dan Wang Jul 2012

R32 Compressor For Air Conditioning And Refrigeration Applications In China, Weihua Guo, Gaofeng Ji, Honghong Zhan, Dan Wang

International Compressor Engineering Conference

This paper evaluates the compressor performance and reliability impact by using R32 refrigerant for air conditioning (residential and commercial system); Performance and reliability impacts are compared with different popular refrigerants used in China, for example, R410A & R22 for AC. The design improvement on the scroll compressor will be discussed in order to reach required efficiency and reliability; these improvements include lubrication, internal heat management, motor design, and vapor injection technologies, etc.

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Modelling Of An Air Compressor Using Energetic Macroscopic Representation, Mahbod Heidari, Martel Tsirinomeney, Alfred Rufer, Philippe Barrade Jul 2012

Modelling Of An Air Compressor Using Energetic Macroscopic Representation, Mahbod Heidari, Martel Tsirinomeney, Alfred Rufer, Philippe Barrade

International Compressor Engineering Conference

This article introduces the energetic macroscopic representation (EMR) as approach for the dynamic nonlinear modeling of a reciprocating air compressor. EMR has been introduced recently for research development in complex electromechanical systems. It is based on action reaction principle, which organizes the system as interconnected subsystems according to the integral causality. The graphical modeling based on EMR has advantages such as readability, modularity, structural and functional characteristics. The EMR is the first step toward model-based control structure development. The air compressor system containing: slider-crank mechanism, cylinder head and valves, is divided into multitude simple subsystems. Each subsystem describes an elementary …

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Investigation Of Start Up Process In Oil Flooded Twin Screw Compressors, Ekaterina Chukanova, Nikola Stosic, Ahmed Kovacevic, Ashvin Dhunput Jul 2012

Investigation Of Start Up Process In Oil Flooded Twin Screw Compressors, Ekaterina Chukanova, Nikola Stosic, Ahmed Kovacevic, Ashvin Dhunput

International Compressor Engineering Conference

Oil injected screw compressors used for air applications and refrigeration are usually installed in simple packages which often do not include oil pump for supply of oil to the bearings and the working chamber. The period of an unlubricated operation depends on the size of the oil system and the length of the discharge piping. When the back pressure reaches the chamber pressure, a normal mode of lubrication will start. Due to the lack of lubrication, rotors will be in direct contact with insufficient or no oil film between them, while the pressure in the compression chamber will increase causing …

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Development Of R744 Two Stage Compressor For Commercial Heat Pump Water Heater, Youhei Hotta, Yoshiyuki Kimata, Hajime Sato, Hiroyuki Kobayashi, Hisao Mizuno Jul 2012

Development Of R744 Two Stage Compressor For Commercial Heat Pump Water Heater, Youhei Hotta, Yoshiyuki Kimata, Hajime Sato, Hiroyuki Kobayashi, Hisao Mizuno

International Compressor Engineering Conference

A novel CO2 two stage compressor has been developed. The developed compressor equips one rotary and one scroll compression chambers as first and second stage respectively. For efficiency improvement, authors measured the cylinder pressure in each stage and conducted loss classification in the compressor. By adopting appropriate compression type in each stage, and by decreasing critical loss found by measuring the pressure, it resulted in 6% and 10% improvement of heating capacity and COP respectively on rated condition, and 25% and over 50% improvement on deep-frozen condition compared with conventional single stage compressor. The developedcompressor is installed on our newly …

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Optimization Of Compression Chamber To Reduce The Viscous Friction In The Piston-Cylinder Clearance, Rodrigo Link Jul 2012

Optimization Of Compression Chamber To Reduce The Viscous Friction In The Piston-Cylinder Clearance, Rodrigo Link

International Compressor Engineering Conference

The compression chamber of a hermetic reciprocating compressor is, normally, formed by a cylinder and a piston which present a constant clearance during the piston displacement inside the compression chamber. This configuration has the advantage of a good sealing, however, during the most part of compression, the pressure difference between compression chamber and internal compressor ambient is small enough to not provide any leakage from chamber to internal ambient. In this situation, during the most part of compression process, the sealing efficiency is not necessary, but the high viscous friction, due the small clearance between piston and cylinder, generates a …

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Development Of An In-Cylinder Heat Transfer Correlation For Reciprocating Compressors, Fernanda P. Disconzi, Cesar J. Deschamps, Evandro L. L. Pereira Jul 2012

Development Of An In-Cylinder Heat Transfer Correlation For Reciprocating Compressors, Fernanda P. Disconzi, Cesar J. Deschamps, Evandro L. L. Pereira

International Compressor Engineering Conference

The gas superheating that takes place throughout the suction system and inside the cylinder of reciprocating compressors adversely affects their overall efficiency. Simulation models adopted in the design of reciprocating compressors are generally based on lumped formulation and rely on empirical correlations for different physical phenomena, including the gas-to-wall heat transfer in the cylinder. The present paper reports a numerical study of heat transfer inside the cylinder of a simplified geometry of reciprocating compressor, considering the effect of fluid flow through the valves. Predictions for the instantaneous heat transfer at the walls are obtained for actual operating conditions and compared …

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Study On A Cooling System For Rotary Compressor, Haifeng Zhang, Shuoyuan Wang, Fei Xie Jul 2012

Study On A Cooling System For Rotary Compressor, Haifeng Zhang, Shuoyuan Wang, Fei Xie

International Compressor Engineering Conference

It is well known that the isothermal compression is an ideal process to consume least power for compressor. The isothermal compression can't be really reached, but can be approached by decreasing the discharge temperature during compression. For this purpose, a cooling system has been built in the paper. Firstly, an innovative circulation system has been built to absorb the heat generated by compression, which is segregated from the refrigeration circulation system. The principle and the structure are introduced. Then, the experimental has been conducted. Based on the experimental, the following results has be obtained: The cooling capacity increased by 1.3%; …

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The Influence Of Optimization Algorithm On Suction Muffler Design, Talita Wajczyk, Rodrigo Link Jul 2012

The Influence Of Optimization Algorithm On Suction Muffler Design, Talita Wajczyk, Rodrigo Link

International Compressor Engineering Conference

The standards for refrigerators energy consumption are increasing faster in the recent past years, so, the situation demands compressor with a higher efficiency level. To develop such compressors the performance of the most important compressor´s components must be increased. However, the pressure for fast time to market are turning more difficulty the optimization process of a big amount of components, specially using experimental validations. One of the most important components in the compressor is the suction muffler. The main suction muffler functions are the thermal insulation of gas from the evaporator and noise attenuation. To increase the performance of muffler …

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Effect Of The Turbulence Modeling In The Prediction Of Heat Transfer In Suction Mufflers, Tadeu Tonheiro Rodrigues, Rodrigo Link Jul 2012

Effect Of The Turbulence Modeling In The Prediction Of Heat Transfer In Suction Mufflers, Tadeu Tonheiro Rodrigues, Rodrigo Link

International Compressor Engineering Conference

The well-grounded knowledge of the available numerical methods is of fundamental importance to get advantage of computational aided design. Concerning compressor development, the employment of Computational Fluid Dynamics is nowadays a must, however, very little attention has been given to the importance of the turbulence modeling in the prediction of flow behavior and, moreover, the heat transfer. The present paper reports an investigation of the turbulence models influence in the heat transfer prediction of the compressor suction system, specifically the suction muffler. The importance of the correct heat transfer modeling in the suction muffler represents great importance for the computation …

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Visualization Of Flow In Scroll Compressor By Radiography, Masatsugu Chikano, Hayato Shimizu, Takeshi Tsuchiya, Kenji Tojo Jul 2012

Visualization Of Flow In Scroll Compressor By Radiography, Masatsugu Chikano, Hayato Shimizu, Takeshi Tsuchiya, Kenji Tojo

International Compressor Engineering Conference

Saving energy and resources in the air conditioning industry is required in order to protect the global environment. To save resources, miniaturization of the compressor in air conditioners is necessary. This miniaturization will increase the oil circulation rate (OCR) of the compressor because the oil separation space will be reduced. To improve the oil separation efficiency, it is necessary to understand the appearance of the flow of oil and refrigerant in the compressor chamber. This paper reports a technique to visualize the flow by using neutron radiography and X-ray radiography. Furthermore, a method to measure the oil concentration by carrying …

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Modal Analysis Of The Rotor-Journal Bearing System Of Rotary Compressor, Zengli Wang, Quanke Feng, Fangyuan Zhang, Xiaoling Yu Jul 2012

Modal Analysis Of The Rotor-Journal Bearing System Of Rotary Compressor, Zengli Wang, Quanke Feng, Fangyuan Zhang, Xiaoling Yu

International Compressor Engineering Conference

In the rotary compressor, the rolling piston and the contacted rotor-journal bearing system are basically moving components. Because of the inertia forces and the periodically changing gas force acting on the rolling piston and the rotor, the journal bearing suffers very large loads. It always leads to serious vibration of the rotor-journal bearing system, and the wear of the rotor. Thus, the vibration must be reduced. In this paper, research works of vibration characteristics of the rotor-journal bearing system were carried out to provide evident of optimizing its structure to reduce the vibration. The average values of the natural frequencies …

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A Valve Design Methodology For Improved Reciprocating Compressor Performance, Aditya Bhakta, Sandeep Dhar, Vaibhav Bahadur, Shruti Angadi, Subhrajit Dey Jul 2012

A Valve Design Methodology For Improved Reciprocating Compressor Performance, Aditya Bhakta, Sandeep Dhar, Vaibhav Bahadur, Shruti Angadi, Subhrajit Dey

International Compressor Engineering Conference

The current work directly relates valve dynamics to the compressor energy efficiency. Majority of the previous studies have focused on reducing pressure losses due to valve geometry, towards improved compressor performance. On a complimentary note, analyzing the valve ‘flutter’ leads to a holistic valve development methodology. Traditionally, pressure actuated reed valves have been used in reciprocating hermetic compressors on the suction and discharge ports. A characteristic of these valve operation is the multiple opening and closing motions, during a single suction and discharge pulse, often referred to as the ‘valve flutter’. This is more prominent for the suction reed considering …

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Abnormal Compressor Noise Diagnosis Using Sound Quality Evaluation And Acoustic Array Method, Jinquan Zhang, Rongting Zhang, Huanhuan Gu, Zhiming Wen, Jia Xu Jul 2012

Abnormal Compressor Noise Diagnosis Using Sound Quality Evaluation And Acoustic Array Method, Jinquan Zhang, Rongting Zhang, Huanhuan Gu, Zhiming Wen, Jia Xu

International Compressor Engineering Conference

A noise abnormal rotary compressor is analyzed with sound quality evaluation method. Sound power level (A), loudness, roughness and sharpness are calculated as objective evaluation parameters, and the results indicate that the abnormal compressor has a poor sound quality compared with a normal one. Acoustic array technique can identify target sound source of complicated shape accurately, and get rich sound field information compared to traditional near-field measurement with a sound level meter. In order to diagnose the abnormal noise, the compressor sound sources are identified and located in full frequency range through acoustic array method. As a result, the key …

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