The Experts below are selected from a list of 35574 Experts worldwide ranked by ideXlab platform
Song Zhe - One of the best experts on this subject based on the ideXlab platform.
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Investigation on the modifications of the suction Flow Passage in a scroll refrigeration compressor
Applied Thermal Engineering, 2020Co-Authors: Sun Shuaihui, Wang Xianwen, Pengcheng Guo, Song ZheAbstract:Abstract Six modification schemes are proposed by enlarging or reducing the volume of the suction Flow Passage based on a scroll refrigeration compressor to improve its performance. The three-dimensional unsteady Computational Fluid Dynamics model is established to investigate the Flow field and the performance of every modified compressor numerically. The results indicate that the enlargement of the suction Passage only improves the volumetric efficiency a little while the shrink of the Passage can improve it effectively. The volume variation of Flow Passage due to the movement of orbiting scroll leads to the mass Flow rate fluctuation. The volumetric efficiency increases and the mass Flow rate pulsation decreases with the modification meshing angle among the tight modification schemes. The volumetric efficiency of the best modification scheme is 14.8% higher than the original one and its suction pulsation intensity is the lowest. But its indicated power increases a lot due to the large discharge loss and radial leakage loss, which result from the higher built-in volume ratio and pressure in the modified suction chamber. The build-in volume ratio of the chamber can be reduced by modifying the profile of the orbiting scroll to weaken the discharge loss of the compressor.
Sun Shuaihui - One of the best experts on this subject based on the ideXlab platform.
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Investigation on the modifications of the suction Flow Passage in a scroll refrigeration compressor
Applied Thermal Engineering, 2020Co-Authors: Sun Shuaihui, Wang Xianwen, Pengcheng Guo, Song ZheAbstract:Abstract Six modification schemes are proposed by enlarging or reducing the volume of the suction Flow Passage based on a scroll refrigeration compressor to improve its performance. The three-dimensional unsteady Computational Fluid Dynamics model is established to investigate the Flow field and the performance of every modified compressor numerically. The results indicate that the enlargement of the suction Passage only improves the volumetric efficiency a little while the shrink of the Passage can improve it effectively. The volume variation of Flow Passage due to the movement of orbiting scroll leads to the mass Flow rate fluctuation. The volumetric efficiency increases and the mass Flow rate pulsation decreases with the modification meshing angle among the tight modification schemes. The volumetric efficiency of the best modification scheme is 14.8% higher than the original one and its suction pulsation intensity is the lowest. But its indicated power increases a lot due to the large discharge loss and radial leakage loss, which result from the higher built-in volume ratio and pressure in the modified suction chamber. The build-in volume ratio of the chamber can be reduced by modifying the profile of the orbiting scroll to weaken the discharge loss of the compressor.
Li Yong - One of the best experts on this subject based on the ideXlab platform.
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INFLUENCE OF CLEARANCE VARIATION IN Flow Passage OF STEAM TURBINE UPON THE RELATIVE INTERNAL EFFICIENCY AND POWER
Thermal Power Generation, 2010Co-Authors: Li YongAbstract:Directing against the phenomenon of big clearance commonly existing in Flow Passage of steam turbines in operation of power-generation units,the influence of big clearance in Flow Passage of steam turbines upon the relative internal efficiency and power has been studied through calculation.Study shows that the big clearance in Flow Passage of steam turbines leads to increase the steam leakage loss,having comparatively large influence upon both the relative internal efficiency and power of high-pressure cylinder in steam turbines.It has been pointed out that the necessity of carrying out condition monitoring for the clearance in Flow Passage of steam turbines,so as to provide basis for repair of Flow Passage in steam turbines and for energy-saving.
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Study on the Norm for Fault Diagnosis of Steam Turbine Flow Passage
Turbine Technology, 2009Co-Authors: Li YongAbstract:It is difficult to determine the norm for fault diagnosis of steam turbine Flow Passage,because the decrease of the relative internal efficiency of steam turbine may be created by Flow Passage fault or by regenerative system fault.Based on analyzing the feature of Flow Passage and regenerative system,the Flow Passage condition of steam turbine can be estimated by relative internal efficiency of stages.According to various effect factors,a method to determine the norm of relative internal efficiency of stages is proposed in the paper.Compared the measured value with this norm,evaluating the operating condition of steam turbine Flow Passage and diagnosing the detailed reasons of fault can be done.The studying results fall foundations for fault diagnosis of steam turbine Flow Passage.
Pengcheng Guo - One of the best experts on this subject based on the ideXlab platform.
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Investigation on the modifications of the suction Flow Passage in a scroll refrigeration compressor
Applied Thermal Engineering, 2020Co-Authors: Sun Shuaihui, Wang Xianwen, Pengcheng Guo, Song ZheAbstract:Abstract Six modification schemes are proposed by enlarging or reducing the volume of the suction Flow Passage based on a scroll refrigeration compressor to improve its performance. The three-dimensional unsteady Computational Fluid Dynamics model is established to investigate the Flow field and the performance of every modified compressor numerically. The results indicate that the enlargement of the suction Passage only improves the volumetric efficiency a little while the shrink of the Passage can improve it effectively. The volume variation of Flow Passage due to the movement of orbiting scroll leads to the mass Flow rate fluctuation. The volumetric efficiency increases and the mass Flow rate pulsation decreases with the modification meshing angle among the tight modification schemes. The volumetric efficiency of the best modification scheme is 14.8% higher than the original one and its suction pulsation intensity is the lowest. But its indicated power increases a lot due to the large discharge loss and radial leakage loss, which result from the higher built-in volume ratio and pressure in the modified suction chamber. The build-in volume ratio of the chamber can be reduced by modifying the profile of the orbiting scroll to weaken the discharge loss of the compressor.
Wang Xianwen - One of the best experts on this subject based on the ideXlab platform.
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Investigation on the modifications of the suction Flow Passage in a scroll refrigeration compressor
Applied Thermal Engineering, 2020Co-Authors: Sun Shuaihui, Wang Xianwen, Pengcheng Guo, Song ZheAbstract:Abstract Six modification schemes are proposed by enlarging or reducing the volume of the suction Flow Passage based on a scroll refrigeration compressor to improve its performance. The three-dimensional unsteady Computational Fluid Dynamics model is established to investigate the Flow field and the performance of every modified compressor numerically. The results indicate that the enlargement of the suction Passage only improves the volumetric efficiency a little while the shrink of the Passage can improve it effectively. The volume variation of Flow Passage due to the movement of orbiting scroll leads to the mass Flow rate fluctuation. The volumetric efficiency increases and the mass Flow rate pulsation decreases with the modification meshing angle among the tight modification schemes. The volumetric efficiency of the best modification scheme is 14.8% higher than the original one and its suction pulsation intensity is the lowest. But its indicated power increases a lot due to the large discharge loss and radial leakage loss, which result from the higher built-in volume ratio and pressure in the modified suction chamber. The build-in volume ratio of the chamber can be reduced by modifying the profile of the orbiting scroll to weaken the discharge loss of the compressor.
