The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform

E. Andersen - One of the best experts on this subject based on the ideXlab platform.

  • Compressor Discharge Line Stress Analysis Utilizing Finite Element Methods
    2011
    Co-Authors: E. Andersen
    Abstract:

    Finite Element Methods have been utilized i.n the stress analysis of a refrigerant compressor internal Discharge gas Line failure problem. F.E.M. provided a useful guide to solving the problem quickly without requiring extensive laboratory test work. Using F.E.M. to help solve this problem was a two step process. First Discharge Line stresses were calculated for a list of displacements the compressor subassembly was assumed to make inside the shell during shipment. As it turned out, only one of the possible displacements investigated produced calculated stresses high enough at the known point of failure to indicate a p·ossible problem. Once the failure promoting displacement had been defined, several Discharge Line modifications were analyzed using this displacement in an attempt to reduce the stress level in the problem area. After F.E.M. analysis of possible design modifications had yielded a satisfactory design for this worst case, the new design was rechecked with all the assumed shipping displacements to ensure that a new problem had not been created elsewhere in the Discharge Line.

  • Compressor Discharge Line Stress Analysis Utilizing Finite Element Methods
    2011
    Co-Authors: E. Andersen
    Abstract:

    Finite Element Methods have been utilized i.n the stress analysis of a refrigerant compressor internal Discharge gas Line failure problem. F.E.M. provided a useful guide to solving the problem quickly without requiring extensive laboratory test work. Using F.E.M. to help solve this problem was a two step process. First Discharge Line stresses were calculated for a list of displacements the compressor subassembly was assumed to make inside the shell during shipment. As it turned out, only one of the possible displacements investigated produced calculated stresses high enough at the known point of failure to indicate a p·ossible problem. Once the failure promoting displacement had been defined, several Discharge Line modifications were analyzed using this displacement in an attempt to reduce the stress level in the problem area. After F.E.M. analysis of possible design modifications had yielded a satisfactory design for this worst case, the new design was rechecked with all the assumed shipping displacements to ensure that a new problem had not been created elsewhere in the Discharge Line.

L B Erbay - One of the best experts on this subject based on the ideXlab platform.

  • Numerical Investigation of Parameters Affecting Discharge Line Pressure Pulsations in Hermetic Reciprocating Compressors
    IOP Conference Series: Materials Science and Engineering, 2019
    Co-Authors: I Yesilaydin, L B Erbay
    Abstract:

    In hermetic reciprocating compressors, it is possible to improve the sound quality of the compressor as well as to minimize the Discharge Line flow losses of the compressor by optimization of the pressure pulsations in the Discharge Line. Pressure pulsation induced vibrations significantly affect both the sound quality and the vibration level of the entire cooling system. This study is prepared to minimize the pressure pulsations in the Discharge Line of the compressor by comparing and determining the effects of alternative designs on pressure pulsations with the numerical results of base and alternative designs formed by differentiation of crankcase orifice diameter and Discharge muffler channel diameter from the Discharge Line design parameters. In this paper, the design parameters that affect the Discharge Line pressure pulsations and flow losses were investigated with a transient CFD analysis methodology, which was developed and confirmed by experimental measurements in previous study. At the end of the study, the geometric characteristics of the different design parameters of the Discharge Line such as orifice diameters are presented with transient numerical analysis.

  • A study on a numerical modelling of Discharge Line flow analysis of a household type refrigerator compressor.
    2018
    Co-Authors: I Yesilaydin, L B Erbay
    Abstract:

    The main component that determines the performance and efficiency of the refrigeration system is the compressor, which is the major energy consumer in a vapor-compression refrigeration system. In hermetic compressors for household refrigerators, one of the major factors that influences the total compressor efficiency is the flow efficiency of Discharge Line. In order to find out the effect of the structural changes to flow losses and pressure fluctuations at Discharge Line, this paper presents a three-dimensional CFD model and experimental study of a hermetic reciprocating compressor. In the first phase of this study, transient numerical flow analysis was developed and it was determined whether or not it overlaps with the experimental measurements. The CFD model results were compared with the experimentally obtained pV indicator diagram and transient pressure measurements of Discharge plenum by varying the rotation speed of the modelled inverter hermetic reciprocating compressor. The result of the studies helps to identify the effect of the Discharge Line design parameters to the system performance.

  • Numerical Investigation of Flow Losses through Discharge Line of Household Type Refrigerator Compressors
    IOP Conference Series: Materials Science and Engineering, 2015
    Co-Authors: I Yesilaydin, L B Erbay
    Abstract:

    The technological developments, competition and energy policies are forcing the refrigeration market to increase the efficiency of their products as never before. The component that determines the performance and efficiency of the refrigeration system is the compressor, which is the major energy consumer in a compression refrigeration system. One of the essential elements of the total compressor efficiency is the Discharge Line flow efficiency that is subjected to this study. In this paper, the effects of design parameters on flow loses at Discharge Line of a hermetic reciprocating compressor were investigated with numerical flow analysis. At this study, three conceptual designs were modelled based on the Discharge Line design parameters such as Line diameter, resonator volumes and Line length. The pressure drop regions are determined by CFD analyses and they compared against the base model. Analyses are carried out by using commercial CFD software. Furthermore, the obtained numerical results were compared to experimental data and presented a good agreement in terms of pressure drop and Discharge Line flow efficiency.

C.f. Jenkins - One of the best experts on this subject based on the ideXlab platform.

  • Failure analysis: Vapor overheads Discharge Line for high level radioactive waste evaporator
    Journal of Failure Analysis and Prevention, 2004
    Co-Authors: C.f. Jenkins
    Abstract:

    A 2 in. schedule 40 steel (60.3 mm diameter, 3.91 mm wall) core pipe in an evaporator overheads Discharge Line broke at several locations downstream from a section of the Line that bridges a road. The failure occurred during pump restart. Fish mouth openings that developed along the pipe seams were initiated at lack of fusion defects in the pipe welds. Full drainage of the water from the pipe did not occur when the pump was shut down because such drainage created an upstream vacuum in the piping system. Freezing of water in the pipe (the Line was not heat traced) and water hammer during pump restart each contributed to the extensive deformation and tearing observed at the breaks. The weld flaws served as crack initiation sites and the water hammer provided the overpressure that led to the fish mouth fracture. The pipe was replaced and a vacuum break was installed to eliminate the drainage problem.

  • FAILURE OF VAPOR OVERHEADS Discharge Line FOR A RADIOACTIVE WASTE EVAPORATOR
    Journal of Failure Analysis and Prevention, 2004
    Co-Authors: C.f. Jenkins
    Abstract:

    A 2 in. schedule 40 steel (60.3 mm diameter, 3.91 mm wall) core pipe in an evaporator overheads Discharge Line broke at several locations downstream from a section of the Line that bridges a road. The failure occurred during pump restart. Fish mouth openings that developed along the pipe seams were initiated at lack of fusion defects in the pipe welds. Full drainage of the water from the pipe did not occur when the pump was shut down because such drainage created an upstream vacuum in the piping system. Freezing of water in the pipe (the Line was not heat traced) and water hammer during pump restart each contributed to the extensive deformation and tearing observed at the breaks. The weld flaws served as crack initiation sites and the water hammer provided the overpressure that led to the fish mouth fracture. The pipe was replaced and a vacuum break was installed to eliminate the drainage problem.

S.yu. Kaygorodov - One of the best experts on this subject based on the ideXlab platform.

I Yesilaydin - One of the best experts on this subject based on the ideXlab platform.

  • Numerical Investigation of Parameters Affecting Discharge Line Pressure Pulsations in Hermetic Reciprocating Compressors
    IOP Conference Series: Materials Science and Engineering, 2019
    Co-Authors: I Yesilaydin, L B Erbay
    Abstract:

    In hermetic reciprocating compressors, it is possible to improve the sound quality of the compressor as well as to minimize the Discharge Line flow losses of the compressor by optimization of the pressure pulsations in the Discharge Line. Pressure pulsation induced vibrations significantly affect both the sound quality and the vibration level of the entire cooling system. This study is prepared to minimize the pressure pulsations in the Discharge Line of the compressor by comparing and determining the effects of alternative designs on pressure pulsations with the numerical results of base and alternative designs formed by differentiation of crankcase orifice diameter and Discharge muffler channel diameter from the Discharge Line design parameters. In this paper, the design parameters that affect the Discharge Line pressure pulsations and flow losses were investigated with a transient CFD analysis methodology, which was developed and confirmed by experimental measurements in previous study. At the end of the study, the geometric characteristics of the different design parameters of the Discharge Line such as orifice diameters are presented with transient numerical analysis.

  • A study on a numerical modelling of Discharge Line flow analysis of a household type refrigerator compressor.
    2018
    Co-Authors: I Yesilaydin, L B Erbay
    Abstract:

    The main component that determines the performance and efficiency of the refrigeration system is the compressor, which is the major energy consumer in a vapor-compression refrigeration system. In hermetic compressors for household refrigerators, one of the major factors that influences the total compressor efficiency is the flow efficiency of Discharge Line. In order to find out the effect of the structural changes to flow losses and pressure fluctuations at Discharge Line, this paper presents a three-dimensional CFD model and experimental study of a hermetic reciprocating compressor. In the first phase of this study, transient numerical flow analysis was developed and it was determined whether or not it overlaps with the experimental measurements. The CFD model results were compared with the experimentally obtained pV indicator diagram and transient pressure measurements of Discharge plenum by varying the rotation speed of the modelled inverter hermetic reciprocating compressor. The result of the studies helps to identify the effect of the Discharge Line design parameters to the system performance.

  • Numerical Investigation of Flow Losses through Discharge Line of Household Type Refrigerator Compressors
    IOP Conference Series: Materials Science and Engineering, 2015
    Co-Authors: I Yesilaydin, L B Erbay
    Abstract:

    The technological developments, competition and energy policies are forcing the refrigeration market to increase the efficiency of their products as never before. The component that determines the performance and efficiency of the refrigeration system is the compressor, which is the major energy consumer in a compression refrigeration system. One of the essential elements of the total compressor efficiency is the Discharge Line flow efficiency that is subjected to this study. In this paper, the effects of design parameters on flow loses at Discharge Line of a hermetic reciprocating compressor were investigated with numerical flow analysis. At this study, three conceptual designs were modelled based on the Discharge Line design parameters such as Line diameter, resonator volumes and Line length. The pressure drop regions are determined by CFD analyses and they compared against the base model. Analyses are carried out by using commercial CFD software. Furthermore, the obtained numerical results were compared to experimental data and presented a good agreement in terms of pressure drop and Discharge Line flow efficiency.