High Pressure CO2 Compressor Testing for Tupi 1, Tupi 2, and Tupi 3

2012 ◽  
Author(s):  
Gary M. Colby ◽  
Timothy R. Griffin ◽  
Manoj K. Gupta ◽  
Harry F. Miller ◽  
Steven E. Nove ◽  
...  
Keyword(s):  
High Pressure ◽  
Performance Test ◽  
Mechanical Test ◽  
Magnetic Bearing ◽  
Operating Conditions ◽  
Actual Process ◽  
Process Gas ◽  
High Pressure Co2 ◽  
Hydrocarbon Gas ◽  
Design And Manufacture

This paper describes the mechanical and aerodynamic testing of the high-pressure CO2 compressors for the Tupi I, Tupi II, and Tupi III projects. This includes the results of the API 617 mechanical test and a special magnetic bearing exciter test to demonstrate rotordynamic stability at design operating conditions, as well as the results of the ASME PTC-10 Type 2 inert gas performance test and the ASME PTC-10 Type 1 full load–full pressure test on a CO2–hydrocarbon gas mixture equivalent to the actual process gas. A brief description of the compressor design and manufacture is also presented.

Effect of Nozzle-Rotor Clearance on Turbine Performance

2006 ◽  
Author(s):  
Eunhwan Jeong ◽  
Pyun Goo Park ◽  
Sang Hun Kang ◽  
Jinhan Kim
Keyword(s):  
High Pressure ◽  
Numerical Analysis ◽  
Pressure Loss ◽  
Performance Test ◽  
Stagnation Pressure ◽  
Operating Conditions ◽  
Impulse Turbine ◽  
Cold Air ◽  
Turbine Performance ◽  
Axial Clearance

This paper presents the results of performance test and numerical analysis of a supersonic impulse turbine. The test has been conducted using high pressure cold air. The overall turbine performance and turbine nozzle behavior for various operating conditions have been investigated. Experiment and numerical analysis also have been conducted to investigate the nozzle-rotor clearance effect on the turbine performance. It has been found that turbine performance degrades with increasing the axial clearance and this phenomenon is mainly due to the increased stagnation pressure loss in the axial clearance region.

scholarly journals Instability Study of Magnetic Journal Bearing under S-CO2 Condition

2021 ◽  
Vol 11 (8) ◽  
pp. 3491
Author(s):  
Dokyu Kim ◽  
SeungJoon Baik ◽  
Jeong Ik Lee
Keyword(s):  
High Pressure ◽  
High Speed ◽  
Journal Bearing ◽  
Magnetic Bearing ◽  
Operating Conditions ◽  
Magnetic Bearings ◽  
Brayton Cycle ◽  
Functional Requirements ◽  
Rotating Shaft ◽  
Levitation Performance

A supercritical CO2 (S-CO2)-cooled Brayton cycle is under development for distributed power applications for remote regions. In order to successfully develop it, issues of controlling shaft levitation with bearings have to be solved. From several studies, magnetic bearings have been suggested for reliable levitation performance with reduced cost and complexity. However, several studies on magnetic bearing show that instability issues under high-pressure fluid and high-speed operating conditions may exist. The purpose of this research is to provide background for understanding the instability of magnetic bearings under S-CO2 conditions and propose functional requirements of the magnetic bearing. Thus, the rotating shaft with magnetic bearings operating under high pressure fluid was first analyzed. To test the theory, a magnetic bearing test rig was constructed. By comparing experimental data to the analysis results, the analysis results were verified. Therefore, the analysis results can be used for predicting instability in the future and can contribute to the development of better magnetic bearing controllers.

Methods for and Benefits of Centrifugal Compressor Design Audits

2003 ◽  
Author(s):  
Robert J. McKee ◽  
Justin R. Hollingsworth ◽  
Anthony J. Smalley
Keyword(s):  
Torsional Vibration ◽  
High Speed ◽  
Performance Test ◽  
Equations Of State ◽  
Pressure Rise ◽  
Rotating Stall ◽  
Operating Conditions ◽  
Design Stage ◽  
Flow Angle ◽  
Process Gas

As gas pipeline and industrial compressors become more powerful and more complex, it has become beneficial to conduct technical audits of these machines in the design stage. Detailed analysis of critical or advanced compressors by independent evaluators have identified operating limitations, resonant responses, potential vibrations, weak components, the onset of stall, and other instabilities, and have recommended ways to eliminate a variety of potential problems before the compressor is placed in operation. The suitability of a compressor and its driver for the planned service should be thoroughly evaluated, so that each component and the system not only satisfy the design conditions, but also extreme operating conditions. This paper presents a description of the tools available for design audits and gives examples of benefits that have resulted from recent audits. The rotordynamics of any large high-speed compressor should be carefully evaluated to identify potential instabilities, high vibration levels, and even destructive responses of the machine. Powerful rotordynamic analysis tools and specific knowledge exists to accurately predict bearing and seal stiffness and damping, lateral critical speeds, and damped forced responses. Some examples of significant results obtained from rotordynamic evaluations are presented, and typical problems that have been identified and eliminated are highlighted. Torsional vibration analyses for compressor trains are an essential aspect of a design audit that have identified vibration problems and weak components. Examples of torsional vibration responses and problems that can be identified and corrected are included in this paper. The aerodynamics of a compressor is a design audit topic to which attention should be paid. Thermophysical properties of the process gas, as it is compressed, are important quantities which can be accurately determined by modern equations of state. The internal velocity distribution and pressure rise per impeller and diffuser can be evaluated to identify areas of excess loss, poor work transfer, or restrictions within a compressor. Flow angles such as at the impeller and diffuser entrances can be predicted and evaluated. The diffuser inlet flow angle is a critical indicator of the onset of rotating stall. This type of aerodynamic analysis also provides important input for performance test planning and evaluation. This paper concludes with a summary of benefits of design audits for pipeline and industrial compressors.

Performance Investigation Into Supersonic Diffuser for a High Pressure Centrifugal Compressor

2014 ◽  
Author(s):  
Takao Sugimoto ◽  
Tsukinami Kawanishi ◽  
Hiroshige Kumamaru ◽  
Yasumasa Tohbe
Keyword(s):  
High Pressure ◽  
Unsteady Flow ◽  
Performance Test ◽  
Pressure Rise ◽  
Operating Conditions ◽  
Performance Measurements ◽  
High Pressure Compressor ◽  
3D Unsteady Flow ◽  
Supersonic Diffuser ◽  
Industrial Gas Turbine

In high pressure centrifugal compressors, the overall stage performance is greatly influenced by its diffuser performance. Extremely complicated non-uniform and unsteady flow exists in the region between the impeller exit and the diffuser inlet. Furthermore, in the case of supersonic diffuser, shock waves can be observed near the diffuser inlet. These can cause aerodynamic losses. Therefore, it is essential to recognize such complicated flow to realize an appropriate diffuser design. An investigation into the performance of supersonic diffuser was carried out using a high pressure compressor test rig for a small industrial gas turbine with a high back swept impeller and a quasi pipe-shaped channel diffuser. In addition, 3D quasi-unsteady flow analyses of the entire compressor by a RANS code with Non Linear Harmonic method at several operating conditions between surge and choke were conducted to investigate the details of unsteady flow between the impeller exit and the diffuser exit. The results of the performance test and that of the 3D unsteady flow analyses have shown good agreement in the pressure rise and the isentropic efficiency at several operating conditions. These support high accuracy of the flow analyses and the performance measurements.

Green approach for fabrication of bacterial cellulose-chitosan composites in the solutions of carbonic acid under high pressure CO2

2021 ◽  
Vol 258 ◽  
pp. 117614
Author(s):  
Ilya V. Novikov ◽  
Marina A. Pigaleva ◽  
Alexander V. Naumkin ◽  
Gennady A. Badun ◽  
Eduard E. Levin ◽  
...  
Keyword(s):  
High Pressure ◽  
Bacterial Cellulose ◽  
Carbonic Acid ◽  
Green Approach ◽  
High Pressure Co2

An experimental study on the flow characteristics during the leakage of high pressure CO2 pipelines

2019 ◽  
Vol 125 ◽  
pp. 92-101 ◽  
Author(s):  
Shuaiwei Gu ◽  
Yuxing Li ◽  
Lin Teng ◽  
Cailin Wang ◽  
Qihui Hu ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Flow Characteristics ◽  
High Pressure Co2

Cross-linked open-pore elastic hydrogels based on tropoelastin, elastin and high pressure CO2

Biomaterials ◽  
2010 ◽  
Vol 31 (7) ◽  
pp. 1655-1665 ◽  
Author(s):  
Nasim Annabi ◽  
Suzanne M. Mithieux ◽  
Anthony S. Weiss ◽  
Fariba Dehghani
Keyword(s):  
High Pressure ◽  
High Pressure Co2

Research on the Structural Performance of Large-Tonnage Gantry Crane

2013 ◽  
Vol 823 ◽  
pp. 247-250
Author(s):  
Jie Dong ◽  
Wen Ming Cheng ◽  
Yang Zhi Ren ◽  
Yu Pu Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Theoretical Calculations ◽  
Complex Structure ◽  
Early Period ◽  
Operating Conditions ◽  
Structural Performance ◽  
Gantry Crane ◽  
Element Analysis ◽  
Design And Manufacture

Because of the huge lifting weight and complex structure of large-tonnage gantry crane and in order to effectively design and review it, this paper aims to carry out a research on its structural performance based on the method of theoretical calculation and finite element analysis. During the early period of design, the method of theoretical calculations is adopted, and after specific design it comes the finite element analysis, so as to get the results of analysis under a variety of operating conditions, which illustrates that the structural design and review of large-tonnage gantry crane based on theoretical calculations and finite element are feasible, and also verifies that the method of finite element is an effective way to find a real dangerous cross-section, thus providing the basis for the design and manufacture of the crane structure.

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