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Articles 8191 - 8220 of 9487
Full-Text Articles in Entire DC Network
Numerical Study And Experimental Validation Of A Transcritical Carbon Dioxide Refrigerating Cycle, Joaquim Rigola, Sergio Morales, Gustavo Raush, Carlos C. Perez Segarra, Nicolas Ablanque
Numerical Study And Experimental Validation Of A Transcritical Carbon Dioxide Refrigerating Cycle, Joaquim Rigola, Sergio Morales, Gustavo Raush, Carlos C. Perez Segarra, Nicolas Ablanque
International Refrigeration and Air Conditioning Conference
No abstract provided.
Application Of Energy Efficient Scroll Compressor For Small Cars, Sangeet Hari Kapoor, Sachin Paramane, Gyan Arora
Application Of Energy Efficient Scroll Compressor For Small Cars, Sangeet Hari Kapoor, Sachin Paramane, Gyan Arora
International Refrigeration and Air Conditioning Conference
No abstract provided.
Nonlinear Tapping Dynamics Of Multi-Walled Carbon Nanotube Tipped Atomic Force Microcantilevers, S. I. Lee, S. W. Howell, A. Raman, R. Reifenberger, C. V. Nguyen, M. Meyyappan
Nonlinear Tapping Dynamics Of Multi-Walled Carbon Nanotube Tipped Atomic Force Microcantilevers, S. I. Lee, S. W. Howell, A. Raman, R. Reifenberger, C. V. Nguyen, M. Meyyappan
Department of Physics and Astronomy Faculty Publications
The nonlinear dynamics of an atomic force microcantilever (AFM) with an attached multi-walled carbon nanotube (MWCNT) tip is investigated experimentally and theoretically. We present the experimental nonlinear frequency response of a MWCNT tipped microcantilever in the tapping mode. Several unusual features in the response distinguish it from those traditionally observed for conventional tips. The MWCNT tipped AFM probe is apparently immune to conventional imaging instabilities related to the coexistence of attractive and repulsive tapping regimes. A theoretical interaction model for the system using an Euler elastica MWCNT model is developed and found to predict several unusual features of the measured …
Meta-Analysis Of Two-Treatment Clinical Trials Including Both Continuous And Dichotomous Results, Charles F. Babbs
Meta-Analysis Of Two-Treatment Clinical Trials Including Both Continuous And Dichotomous Results, Charles F. Babbs
Weldon School of Biomedical Engineering Faculty Publications
To expedite the timely creation of medical practice guidelines, a meta-analytic method was developed to combine of both dichotomous survival data and continuous physiologic data from multiple studies comparing the same innovative clinical intervention to standard care. The method is adapted for synthesis of small, early studies of novel treatments. An aggregate ratio, R*, of the observed treatment effect to a clinically optimal treatment effect for studies in a series is computed, and compared to the 95% confidence limit for R* under the null hypothesis. Weights assigned to each study may reflect its precision, quality, or clinical relevance. Input data …
Boundary Layer Leakage Model, Jan Prins
Boundary Layer Leakage Model, Jan Prins
International Compressor Engineering Conference
No abstract provided.
Extending The Operation Range Of Dry Screw Compressors By Cooling Their Rotors, Nikola Stosic, Ian K. Smith, Ahmed Kovacevic
Extending The Operation Range Of Dry Screw Compressors By Cooling Their Rotors, Nikola Stosic, Ian K. Smith, Ahmed Kovacevic
International Compressor Engineering Conference
No abstract provided.
Theoretical And Experimental Investigation Of Compression Loads In Twin Screw Compressor, Hua Gen Wu, Yuan Ma, Zi Wen Xing
Theoretical And Experimental Investigation Of Compression Loads In Twin Screw Compressor, Hua Gen Wu, Yuan Ma, Zi Wen Xing
International Compressor Engineering Conference
No abstract provided.
A Three-Dimensional Quantum Simulation Of Silicon Nanowire Transistors With The Effective Mass Approximation, Jing Wang, Eric Polizzi, Mark S. Lundstrom
A Three-Dimensional Quantum Simulation Of Silicon Nanowire Transistors With The Effective Mass Approximation, Jing Wang, Eric Polizzi, Mark S. Lundstrom
Department of Electrical and Computer Engineering Faculty Publications
The silicon nanowire transistor (SNWT) is a promising device structure for future integrated circuits, and simulations will be important for understanding its device physics and assessing its ultimate performance limits. In this work, we present a three-dimensional (3D) quantum mechanical simulation approach to treat various SNWTs within the effective-mass approximation. We begin by assuming ballistic transport, which gives the upper performance limit of the devices. The use of a mode space approach (either coupled or uncoupled) produces high computational efficiency that makes our 3D quantum simulator practical for extensive device simulation and design. Scattering in SNWTs is then treated by …
Analysis Of A Phase Change Energy Storage System For Pulsed Power Dissipation, S Krishnan, S V. Garimella
Analysis Of A Phase Change Energy Storage System For Pulsed Power Dissipation, S Krishnan, S V. Garimella
CTRC Research Publications
The melting of a phase change material in a container of rectangular cross-section with multiple discrete heat sources mounted on one side is investigated for electronics cooling by latent heat energy storage. This numerical study focuses on the thermal management issues that arise when electronic components experience sudden surges in power dissipation. The transient response of the energy storage system to short pulses in power dissipation is studied. Convective cooling using air-cooled heat sinks on the sides of the containment remote from the heat sources provides for heat rejection to ambient air. The analysis is performed under different pulse frequencies. …
Transport In Flat Heat Pipes At High Heat Fluxes From Multiple Discrete Sources, U. Vadakkan, S V. Garimella, J. Y. Murthy
Transport In Flat Heat Pipes At High Heat Fluxes From Multiple Discrete Sources, U. Vadakkan, S V. Garimella, J. Y. Murthy
CTRC Research Publications
A three-dimensional model has been developed to analyze the transient and steady-state performance of flat heat pipes subjected to heating with multiple discrete heat sources. Three-dimensional flow and energy equations are solved in the vapor and liquid regions, along with conduction in the wall. Saturated flow models are used for heat transfer and fluid flow through the wick. In the wick region, the analysis uses an equilibrium model for heat transfer and a Brinkman-Forchheimer extended Darcy model for fluid flow. Averaged properties weighted with the porosity are used for the wick analysis. The state equation is used in the vapor …
Thermal Management Of Transient Power Spikes In Electronics - Phase Change Energy Storage Or Copper Heat Sinks?, S. Krishnan, S V. Garimella
Thermal Management Of Transient Power Spikes In Electronics - Phase Change Energy Storage Or Copper Heat Sinks?, S. Krishnan, S V. Garimella
CTRC Research Publications
A transient thermal analysis is performed to investigate thermal control of power semiconductors using phase change materials, and to compare the performance of this approach to that of copper heat sinks. Both the melting of the phase change material under a transient power spike input, as well as the resolidification process, are considered. Phase change materials of different kinds (paraffin waxes and metallic alloys) are considered, with and without the use of thermal conductivity enhancers. Simple expressions for the melt depth, melting time and temperature distribution are presented in terms of the dimensions of the heat sink and the thermophysical …
A Two-Temperature Model For The Analysis Of Passive Thermal Control Systems, S. Krishnan, J. Y. Murthy, S V. Garimella
A Two-Temperature Model For The Analysis Of Passive Thermal Control Systems, S. Krishnan, J. Y. Murthy, S V. Garimella
CTRC Research Publications
Passive control of steady and unsteady thermal loads using effective thermal conductivity enhancers, such as metal foams, internal fins and metal filler particles, is being explored for a variety of electronics applications. The interstices are filled with air, phase change materials, or other fluids. Local thermal equilibrium between the solid filler and the matrix is not ensured in such systems since their thermal diffusivities are frequently very different. The use of a single volume-averaged energy equation for both the phases cannot be justified in such situations. A two-medium approach is used in the present work to account for the local …
Design Of Flapper Valves For A Co2 Commercial Refrigeration Compressor, Douglas A. Collings, Thomas J. Weadock
Design Of Flapper Valves For A Co2 Commercial Refrigeration Compressor, Douglas A. Collings, Thomas J. Weadock
International Compressor Engineering Conference
No abstract provided.
Optimizing Chest Compression To Rescue Ventilation Ratios During One-Rescuer Cpr By Professionals And Lay Persons: Children Are Not Just Little Adults, Charles F. Babbs, Vinay Nadkarni
Optimizing Chest Compression To Rescue Ventilation Ratios During One-Rescuer Cpr By Professionals And Lay Persons: Children Are Not Just Little Adults, Charles F. Babbs, Vinay Nadkarni
Weldon School of Biomedical Engineering Faculty Publications
Objective: To estimate the optimum ratio of chest compressions to ventilations for onerescuer CPR that maximizes systemic oxygen delivery in children. Method: Equations describing oxygen delivery and blood flow during CPR as functions of the number of compressions and the number of ventilations delivered over time were adapted from the former work of Babbs and Kern. These equations were solved explicitly as a function of body weight, using scaling algorithms based upon principles of developmental anatomy and physiology. Results: The optimal compression to ventilation (C/V) ratios for infants and younger children increase sharply as a function of body weight. Optimal …
Thermal And Fluid Dynamic Behavior Of Trans-Critical Carbon Dioxide Hermetic Reciprocating Compressors: Numerical Analysis, Carlos D. Perã©Z Segarra, Joaquim Rigola, Assensi Oliva
Thermal And Fluid Dynamic Behavior Of Trans-Critical Carbon Dioxide Hermetic Reciprocating Compressors: Numerical Analysis, Carlos D. Perã©Z Segarra, Joaquim Rigola, Assensi Oliva
International Compressor Engineering Conference
No abstract provided.
Modeling And Simulation Of The Suction Process In A Multi-Cylinder Automotive Compressor, Jeong Il Park, Douglas E. Adams, Yoshinobu Ichikawa, Jacob Bayyouk
Modeling And Simulation Of The Suction Process In A Multi-Cylinder Automotive Compressor, Jeong Il Park, Douglas E. Adams, Yoshinobu Ichikawa, Jacob Bayyouk
International Compressor Engineering Conference
No abstract provided.
Analysis Of Structural Mistuning Effects On Bladed Disc Vibrations Including Aerodynamic Damping, Yoon S. Choi, Dana A. Gottfried, Sanford Fleeter
Analysis Of Structural Mistuning Effects On Bladed Disc Vibrations Including Aerodynamic Damping, Yoon S. Choi, Dana A. Gottfried, Sanford Fleeter
International Compressor Engineering Conference
No abstract provided.
Performance Study Of A 3-Ton Residential Co2 A/C System With A Variable Flow Rate Co2 Compressor, Rodney A. Hugelman
Performance Study Of A 3-Ton Residential Co2 A/C System With A Variable Flow Rate Co2 Compressor, Rodney A. Hugelman
International Compressor Engineering Conference
No abstract provided.
Modeling And Testing Of An Automobile Ac Scroll Compressor, Part I: Model Development, Feng Shou Yi, Eckhard A. Groll, James A. Braun
Modeling And Testing Of An Automobile Ac Scroll Compressor, Part I: Model Development, Feng Shou Yi, Eckhard A. Groll, James A. Braun
International Compressor Engineering Conference
No abstract provided.
Modeling And Testing Of An Automobile Ac Scroll Compressor, Part Ii: Model Validation, Feng Shou Yi, Eckhard A. Groll, James A. Braun
Modeling And Testing Of An Automobile Ac Scroll Compressor, Part Ii: Model Validation, Feng Shou Yi, Eckhard A. Groll, James A. Braun
International Compressor Engineering Conference
No abstract provided.
Self-Excited Vibration In A Radially And Axially Compliant Scroll Compressor, Hubert Bukac
Self-Excited Vibration In A Radially And Axially Compliant Scroll Compressor, Hubert Bukac
International Compressor Engineering Conference
No abstract provided.
Instantaneous Frequency: Another Tool Of Source Of Noise Identification, Hubert Bukac
Instantaneous Frequency: Another Tool Of Source Of Noise Identification, Hubert Bukac
International Compressor Engineering Conference
No abstract provided.
Boundary Element Analysis Of The Muffler For The Noise Reduction Of The Compressors, Jong Chun Park, Se Myung Wang, Jung Hwan Kang, Daeil Kwon
Boundary Element Analysis Of The Muffler For The Noise Reduction Of The Compressors, Jong Chun Park, Se Myung Wang, Jung Hwan Kang, Daeil Kwon
International Compressor Engineering Conference
No abstract provided.
Computer Simulation And Experimental Validation Of Scroll Compressors, Yu Choung Chang, Ching Eeng Tsai, Ching Huan Tseng, Guang Der Tarng, Lung Tsai Chang
Computer Simulation And Experimental Validation Of Scroll Compressors, Yu Choung Chang, Ching Eeng Tsai, Ching Huan Tseng, Guang Der Tarng, Lung Tsai Chang
International Compressor Engineering Conference
No abstract provided.
Simulation Of An Innovative Rotary Compressor With Variable Speed Displacers, A. R. Barreto, Julio Kopelowicz, Jose A. R. Parise
Simulation Of An Innovative Rotary Compressor With Variable Speed Displacers, A. R. Barreto, Julio Kopelowicz, Jose A. R. Parise
International Compressor Engineering Conference
No abstract provided.
A Uniform Property Region Method For Screw Compressor's End-Face Leakage Prediction, Calim Zamfirescu, Carlos A. Infante Ferreira
A Uniform Property Region Method For Screw Compressor's End-Face Leakage Prediction, Calim Zamfirescu, Carlos A. Infante Ferreira
International Compressor Engineering Conference
No abstract provided.
Calculation Of Dynamic Stresses In Flapper Valves With Flexible Backers, James R. Lenz
Calculation Of Dynamic Stresses In Flapper Valves With Flexible Backers, James R. Lenz
International Compressor Engineering Conference
No abstract provided.
Mechanical Spring Reliability Assessments Based On Fea Generated Fatigue Stresses And Monte Carlo Simulated Stress/Strength Distributions, Jian Xiong Chen, Wen Chen Yan
Mechanical Spring Reliability Assessments Based On Fea Generated Fatigue Stresses And Monte Carlo Simulated Stress/Strength Distributions, Jian Xiong Chen, Wen Chen Yan
International Compressor Engineering Conference
No abstract provided.
Modeling Capacity And Coefficient Of Performance Of A Refrigeration Compressor, Hubert Bukac
Modeling Capacity And Coefficient Of Performance Of A Refrigeration Compressor, Hubert Bukac
International Compressor Engineering Conference
No abstract provided.
Design Optimization Of An Oil-Flooded Refrigeration Single Screw Compressor, Hong Qi Li, Li Wen Jin
Design Optimization Of An Oil-Flooded Refrigeration Single Screw Compressor, Hong Qi Li, Li Wen Jin
International Compressor Engineering Conference
No abstract provided.