scholarly journals Effect of Lubrication on the Performance and Dynamic Loads of Scroll Compressors

2001 ◽  
Vol 17 (4) ◽  
pp. 201-210
Author(s):  
Jen-Jie Hsieh ◽  
Wen-Shing Lee ◽  
Wen-Fang Wu ◽  
Sih-Li Chen
Keyword(s):  
Measured Data ◽  
Dynamic Loads ◽  
Simulation Program ◽  
Design Parameters ◽  
Rotating Speed ◽  
Design Improvement ◽  
Dynamic Analyses ◽  
Oil Flow ◽  
Computer Simulation Program ◽  
Force Contact

ABSTRACTTo study the effect of lubrication on the performance and dynamic loads of scroll compressors, a theoretical model is proposed in this paper. The model includes both thermal and dynamic analyses in which the lubrication theory is emphasized in particular. A computer simulation program is written accordingly, and the effects of different design parameters including oil flow rate, injection position, injection temperature and rotating speed are investigated. The output variables such as gas force, contact force, contact moment and thermal performance of the compressor are obtained. Some of the results are compared with experimentally measured data, and good agreements are found between the simulation results and the measured data. The applicability of the simulation program is thus verified.Analytical results from running this program can provide us valuable information on the design improvement of a scroll compressor.

Performance and Bearing Load Analysis of a Twin Screw Air Compressor

1999 ◽  
Vol 15 (2) ◽  
pp. 69-78 ◽  
Author(s):  
W. S. Lee ◽  
R. H. Ma ◽  
W.F. Wu ◽  
S.L. Chen ◽  
H.W. Hsia
Keyword(s):  
Measured Data ◽  
Specific Power ◽  
Design Parameters ◽  
Air Compressor ◽  
Operational Conditions ◽  
Discharge Temperature ◽  
Oil Flow ◽  
Twin Screw ◽  
Computer Simulation Program ◽  
Bearing Loads

ABSTRACTTo study the performance and estimate the oscillating bearing loads of a twin screw air compressor, a theoretical model is proposed in this paper. Based on the model, a computer simulation program is developed and effects of different design parameters such as rotor profile, geometric clearance, oil injected position, oil temperature, oil flow rate and other operational conditions are investigated. Output variables such as bearing loads, specific power, compression efficiency, volumetric efficiency, discharge temperature are obtained. Some of the results are then compared with experimentally measured data, and good agreements are found between the simulation results and the measured data.

scholarly journals Numerical Simulation and Performance Analysis of Twin Screw Air Compressors

2001 ◽  
Vol 7 (1) ◽  
pp. 65-78 ◽  
Author(s):  
W. S. Lee ◽  
R. H. Ma ◽  
S. L. Chen ◽  
W. F. Wu ◽  
H. W. Hsia
Keyword(s):  
Volume Ratio ◽  
Measured Data ◽  
Simulation Program ◽  
Specific Power ◽  
Design Parameters ◽  
Operation Conditions ◽  
Discharge Temperature ◽  
Oil Flow ◽  
Twin Screw ◽  
Air Compressors

A theoretical model is proposed in this paper in order to study the performance of oil-less and oil-injected twin screw air compressors. Based on this model, a computer simulation program is developed and the effects of different design parameters including rotor profile, geometric clearance, oil-injected angle, oil temperature, oil flow rate, built-in volume ratio and other operation conditions on the performance of twin screw air compressors are investigated. The simulation program gives us output variables such as specific power, compression ratio, compression efficiency, volumetric efficiency, and discharge temperature. Some of the above results are then compared with experimentally measured data and good agreement is found between the simulation results and the measured data.

Electrodynamic Oscillating Compressors: Part 2—Evaluation of Specific Designs for Gas Loads

1969 ◽  
Vol 91 (4) ◽  
pp. 664-670 ◽  
Author(s):  
R. V. Cadman ◽  
R. Cohen
Keyword(s):  
Computer Simulation ◽  
Digital Computer ◽  
Measured Data ◽  
Simulation Program ◽  
Laboratory Research ◽  
Loading Conditions ◽  
Computer Simulation Program ◽  
Simulation Results

In Part 1, electrodynamic drivers are designed for a single, linearized load. In this part, a digital computer simulation program is described. This program more accurately models the nonlinearities of the actual gas load, and can be used to check the performance of candidate designs over the expected range of loading conditions. Two selected designs, a laboratory research compressor and a commercial electrodynamic compressor, were discussed in Part 1. Simulation results for the former are discussed and compared to experimentally measured data. For the latter, a comparable design, also presented in Part 1, is simulated and the results are discussed.

Modeling of multi-electrolyte transport in charged ceramic and organic nanofilters using the computer simulation program NanoFlux

Desalination ◽  
2002 ◽  
Vol 147 (1-3) ◽  
pp. 231-236 ◽  
Author(s):  
J. Palmeri ◽  
J. Sandeaux ◽  
R. Sandeaux ◽  
X. Lefebvre ◽  
P. David ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Electrolyte Transport ◽  
Simulation Program ◽  
Computer Simulation Program

Design and analysis of a novel seven-bar mechanical servo press with dual motors inputs

2016 ◽  
Vol 231 (20) ◽  
pp. 3855-3865
Author(s):  
Chen Liu ◽  
Sheng-Dun Zhao ◽  
Jing-Xiang Li
Keyword(s):  
Metal Forming ◽  
Theoretical Study ◽  
High Capacity ◽  
High Ratio ◽  
Measured Data ◽  
Servo Motor ◽  
Symmetric Structure ◽  
Servo Press ◽  
The Press ◽  
Dynamic Analyses

This paper proposes a novel high capacity servo press system with two servo motor inputs and high ratio force amplifier mechanism for metal forming. First, the press structure was expressed. The force amplifier was made of seven-bar mechanism which possesses quick-return character and high ratio force amplifier. The symmetric structure balanced the force in horizontal direction, and dispersed the forces on two transmission routes. In theoretical study of the new structure, kinematic and dynamic analyses were obtained by examining the geometry of the structure. The performance of press was discussed by example demonstration. Finally, the kinematic experiments and metal forming experiments were carried out on the prototype machine by using grating scale system. The measured data match the theoretical calculation well, which validates the feasibility of this new press mechanism.

Effect of Cutter Performance on Finished Tooth Form in Gear Shaving

1992 ◽  
Author(s):  
I. Moriwaki ◽  
M. Fujita
Keyword(s):  
Computer Simulation ◽  
Mean Value ◽  
Cutting Performance ◽  
Simulation Program ◽  
Tooth Surface ◽  
Depth Of Cut ◽  
Small Depth ◽  
Computer Simulation Program ◽  
Tooth Form ◽  
Cutting Model

Abstract The authors have been developed a computer simulation program of gear shaving. In the present paper, a new cutting model of shaving process is proposed so as to incorporate an effect of a cutting performance of shaving cutter into the simulation program. In this cutting model, it is assumed that a tooth flank material of work gear can be removed only when a depth of cut of a cutting edge exceeds a certain criterion. It is also assumed that the criterion have no definite value but has the nominal distribution over the tooth surface. The mean value of the distribution can define a characteristic of cutting performance of shaving cutter. The small mean value means that even small depth of cut can cause a stock removal; i.e. a good cutter performance. The computer simulations on gear shaving are performed to reveal the effect of the cutter performance on shaved tooth form. Under the conditions used in these simulations, the pressure angle error on the shaved tooth profile becomes remarkable as the cutter performance becomes worse. Thus, the developed computer simulation program of gear shaving has a reliability on the prediction of shaved tooth form. It will be useful for design of shaving cutter, judgement of tool life, and so on.

A Computational Model for Performance Prediction of a Hybrid PV/T Module

2014 ◽  
Author(s):  
Francisco E. Zevallos ◽  
Cheng-Xian Lin ◽  
Robel Kiflemariam
Keyword(s):  
Computational Simulation ◽  
Thermal Design ◽  
Simulation Program ◽  
Back Surface ◽  
Solar Photovoltaic ◽  
Analytical Expression ◽  
Pv Module ◽  
Computer Simulation Program ◽  
Water Collector ◽  
Instantaneous Energy

In this paper we investigate the performance of an integrated solar photovoltaic and thermal (PV/T) liquid (water) collector using a computational simulation program. A detailed time-dependent thermal model was formulated to calculate and correlate the thermal parameters in a standard PV/T collector, including solar cell temperature, back surface temperature, and outlet water temperature. Based on the energy balance of each component of the system, an analytical expression for the temperature of the PV module and the water was derived. In addition, an analytical expression for the instantaneous energy efficiency of the PV/T collector was also derived in terms of thermal, design and climatic parameters. Built on previously published model, a new computer simulation program was developed and validated. The thermal simulation results obtained are more precise than those previously reported in the literature.

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