1-20 of 20
H. Ezzat Khalifa
Close
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Effect of Oil on the Dynamics of Compressor Suction Valve

H. Ezzat Khalifa, Xin Liu
Proc. ASME. DETC97, Volume 1C: 16th Biennial Conference on Mechanical Vibration and Noise, V01CT12A009, September 14–17, 1997
Publisher: American Society of Mechanical Engineers
Paper No: DETC97/VIB-4029
https://doi.org/10.1115/DETC97/VIB-4029
View Paper titled, Effect of Oil on the Dynamics of Compressor Suction Valve
Open the PDF for Effect of Oil on the Dynamics of Compressor Suction Valve in another window
Topics: Compressors, Dynamics (Mechanics), Suction, Valves, Stiction, Pressure, Viscosity, Cylinders, Delays, Failure
Journal Articles

Phase Change Material Freezing in an Energy Storage Module for a Micro Environmental Control System

H. Ezzat Khalifa, Mustafa Koz
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. December 2018, 10(6): 061008.
Paper No: TSEA-18-1029
https://doi.org/10.1115/1.4040697
Published Online: August 20, 2018
View Article titled, Phase Change Material Freezing in an Energy Storage Module for a Micro Environmental Control System
Open the PDF for Phase Change Material Freezing in an Energy Storage Module for a Micro Environmental Control System in another window
Topics: Freezing, Slabs, Temperature, Phase change materials, Refrigerants, Coolants, Cooling, Finite element model
Journal Articles

Phase Change Material Melting in an Energy Storage Module for a Micro Environmental Control System

Mustafa Koz, H. Ezzat Khalifa
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research-Article
J. Thermal Sci. Eng. Appl. December 2018, 10(6): 061010.
Paper No: TSEA-18-1107
https://doi.org/10.1115/1.4040896
Published Online: August 20, 2018
View Article titled, Phase Change Material Melting in an Energy Storage Module for a Micro Environmental Control System
Open the PDF for Phase Change Material Melting in an Energy Storage Module for a Micro Environmental Control System in another window
Topics: Air flow, Control systems, Cooling, Finite element model, Melting, Phase change materials, Slabs, Temperature, Storage, Finite element methods
Proceedings Papers

Numerical Investigation of the Freezing of a Phase Change Material in a Thermal Storage Device With an Embedded Evaporator

H. Ezzat Khalifa, Mustafa Koz
Proc. ASME. HT2016, Volume 2: Heat Transfer in Multiphase Systems; Gas Turbine Heat Transfer; Manufacturing and Materials Processing; Heat Transfer in Electronic Equipment; Heat and Mass Transfer in Biotechnology; Heat Transfer Under Extreme Conditions; Computational Heat Transfer; Heat Transfer Visualization Gallery; General Papers on Heat Transfer; Multiphase Flow and Heat Transfer; Transport Phenomena in Manufacturing and Materials Processing, V002T08A021, July 10–14, 2016
Publisher: American Society of Mechanical Engineers
Paper No: HT2016-7409
https://doi.org/10.1115/HT2016-7409
View Paper titled, Numerical Investigation of the Freezing of a Phase Change Material in a Thermal Storage Device With an Embedded Evaporator
Open the PDF for Numerical Investigation of the Freezing of a Phase Change Material in a Thermal Storage Device With an Embedded Evaporator in another window
Topics: Freezing, Phase change materials, Thermal energy storage, Finite element methods, Finite element model, Cooling, Natural convection, Refrigerants, Slabs, Compression
Proceedings Papers

Numerical Investigation of the Melting of a Phase Change Material in a Thermal Storage Device With Embedded Air Flow Channels

Mustafa Koz, Hamza S. Erden, H. Ezzat Khalifa
Proc. ASME. HT2016, Volume 2: Heat Transfer in Multiphase Systems; Gas Turbine Heat Transfer; Manufacturing and Materials Processing; Heat Transfer in Electronic Equipment; Heat and Mass Transfer in Biotechnology; Heat Transfer Under Extreme Conditions; Computational Heat Transfer; Heat Transfer Visualization Gallery; General Papers on Heat Transfer; Multiphase Flow and Heat Transfer; Transport Phenomena in Manufacturing and Materials Processing, V002T08A022, July 10–14, 2016
Publisher: American Society of Mechanical Engineers
Paper No: HT2016-7412
https://doi.org/10.1115/HT2016-7412
View Paper titled, Numerical Investigation of the Melting of a Phase Change Material in a Thermal Storage Device With Embedded Air Flow Channels
Open the PDF for Numerical Investigation of the Melting of a Phase Change Material in a Thermal Storage Device With Embedded Air Flow Channels in another window
Topics: Air flow, Melting, Phase change materials, Thermal energy storage, Slabs, Finite element model, Aluminum tube, Aluminum, Computer simulation, Cooling
Proceedings Papers

Parameter Estimation for Lumped Capacitance Modeling of CRAH Units During Chilled Water Interruption

Hamza Salih Erden, H. Ezzat Khalifa
Proc. ASME. InterPACK2015, Volume 1: Thermal Management, V001T09A026, July 6–9, 2015
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2015-48430
https://doi.org/10.1115/IPACK2015-48430
View Paper titled, Parameter Estimation for Lumped Capacitance Modeling of CRAH Units During Chilled Water Interruption
Open the PDF for Parameter Estimation for Lumped Capacitance Modeling of CRAH Units During Chilled Water Interruption in another window
Topics: Capacitance, Modeling, Parameter estimation, Water, Data centers, Transients (Dynamics), Air flow, Computers, Cooling, Failure
Proceedings Papers

Combined Cycles for Hybrid Fossil/Geothermal Power Generation

H. Ezzat Khalifa
Proc. ASME. JPGC1983-GTPapers, 1983 Joint Power Generation Conference: GT Papers, V001T02A002, September 25–29, 1983
Publisher: American Society of Mechanical Engineers
Paper No: 83-JPGC-GT-2
https://doi.org/10.1115/83-JPGC-GT-2
View Paper titled, Combined Cycles for Hybrid Fossil/Geothermal Power Generation
Open the PDF for Combined Cycles for Hybrid Fossil/Geothermal Power Generation in another window
Topics: Combined cycles, Geothermal power, Combustion, Geothermal engineering, Power stations, Cycles, Economic analysis, Engines, Exhaust systems, Fluids
Journal Articles

Determination of the Lumped-Capacitance Parameters of Air-Cooled Servers Through Air Temperature Measurements

Hamza Salih Erden, H. Ezzat Khalifa, Roger R. Schmidt
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Research-Article
J. Electron. Packag. September 2014, 136(3): 031005.
Paper No: EP-13-1107
https://doi.org/10.1115/1.4027092
Published Online: May 5, 2014
View Article titled, Determination of the Lumped-Capacitance Parameters of Air-Cooled Servers Through Air Temperature Measurements
Open the PDF for Determination of the Lumped-Capacitance Parameters of Air-Cooled Servers Through Air Temperature Measurements in another window
Topics: Capacitance, Temperature, Transients (Dynamics), Heat transfer, Data centers, Computational fluid dynamics, Air flow
Proceedings Papers

Assessment of the Energy Performance of Cogeneration Systems for Powering and Cooling Data Centers

Dale C. Ringham, Dan J. Rice, Brian S. Granetz, Hamza Salih Erden, H. Ezzat Khalifa, Roger R. Schmidt
Proc. ASME. InterPACK2013, Volume 2: Thermal Management; Data Centers and Energy Efficient Electronic Systems, V002T09A022, July 16–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2013-73268
https://doi.org/10.1115/IPACK2013-73268
View Paper titled, Assessment of the Energy Performance of Cogeneration Systems for Powering and Cooling Data Centers
Open the PDF for Assessment of the Energy Performance of Cogeneration Systems for Powering and Cooling Data Centers in another window
Topics: Cogeneration systems, Cooling, Data centers, Electricity (Physics), Exhaust systems, Turbines, Absorption, Combined heat and power, Heat, Heat exchangers
Proceedings Papers

Transient Thermal Response of Servers Through Air Temperature Measurements

Hamza Salih Erden, H. Ezzat Khalifa, Roger R. Schmidt
Proc. ASME. InterPACK2013, Volume 2: Thermal Management; Data Centers and Energy Efficient Electronic Systems, V002T09A023, July 16–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2013-73281
https://doi.org/10.1115/IPACK2013-73281
View Paper titled, Transient Thermal Response of Servers Through Air Temperature Measurements
Open the PDF for Transient Thermal Response of Servers Through Air Temperature Measurements in another window
Topics: Temperature measurement, Transients (Dynamics), Capacitance, Temperature, Computational fluid dynamics, Data centers, Thermal conductivity
Proceedings Papers

Room-Level Transient CFD Modeling of Rack Shutdown

Hamza Salih Erden, H. Ezzat Khalifa, Roger R. Schmidt
Proc. ASME. InterPACK2013, Volume 2: Thermal Management; Data Centers and Energy Efficient Electronic Systems, V002T09A024, July 16–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2013-73282
https://doi.org/10.1115/IPACK2013-73282
View Paper titled, Room-Level Transient CFD Modeling of Rack Shutdown
Open the PDF for Room-Level Transient CFD Modeling of Rack Shutdown in another window
Topics: Computational fluid dynamics, Modeling, Transients (Dynamics), Temperature, Boundary-value problems, Data centers, Heat, Simulation results, Steady state
Journal Articles

Expanded Assessment of a Practical Thermally Aware Energy-Optimized Load Placement Strategy for Open-Aisle, Air-Cooled Data Centers

Dustin W. Demetriou, H. Ezzat Khalifa
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Research-Article
J. Electron. Packag. September 2013, 135(3): 030907.
Paper No: EP-12-1049
https://doi.org/10.1115/1.4024945
Published Online: July 24, 2013
View Article titled, Expanded Assessment of a Practical Thermally Aware Energy-Optimized Load Placement Strategy for Open-Aisle, Air-Cooled Data Centers
Open the PDF for Expanded Assessment of a Practical Thermally Aware Energy-Optimized Load Placement Strategy for Open-Aisle, Air-Cooled Data Centers in another window
Topics: Data centers, Stress, Temperature, Air flow, Cooling
Journal Articles

Thermally Aware, Energy-Based Load Placement in Open-Aisle, Air-Cooled Data Centers

Dustin W. Demetriou, H. Ezzat Khalifa
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Research-Article
J. Electron. Packag. September 2013, 135(3): 030906.
Paper No: EP-12-1048
https://doi.org/10.1115/1.4024946
Published Online: July 24, 2013
View Article titled, Thermally Aware, Energy-Based Load Placement in Open-Aisle, Air-Cooled Data Centers
Open the PDF for Thermally Aware, Energy-Based Load Placement in Open-Aisle, Air-Cooled Data Centers in another window
Topics: Data centers, Stress, Temperature, Cooling, Optimization, Air flow
Journal Articles

Improved Computational Fluid Dynamics Model for Open-Aisle Air-Cooled Data Center Simulations

Waleed A. Abdelmaksoud, Thong Q. Dang, H. Ezzat Khalifa, Roger R. Schmidt
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Research-Article
J. Electron. Packag. September 2013, 135(3): 030901.
Paper No: EP-12-1089
https://doi.org/10.1115/1.4024766
Published Online: July 24, 2013
View Article titled, Improved Computational Fluid Dynamics Model for Open-Aisle Air-Cooled Data Center Simulations
Open the PDF for Improved Computational Fluid Dynamics Model for Open-Aisle Air-Cooled Data Center Simulations in another window
Topics: Computational fluid dynamics, Data centers, Flow (Dynamics), Temperature, Tiles, Simulation
Journal Articles

Optimization of Enclosed Aisle Data Centers Using Bypass Recirculation

Dustin W. Demetriou, H. Ezzat Khalifa
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Photo Gallery
J. Electron. Packag. June 2012, 134(2): 020904.
https://doi.org/10.1115/1.4005907
Published Online: June 11, 2012
View Article titled, Optimization of Enclosed Aisle Data Centers Using Bypass Recirculation
Open the PDF for Optimization of Enclosed Aisle Data Centers Using Bypass Recirculation in another window
Topics: Computational fluid dynamics, Cooling, Data centers, Energy consumption, Flow (Dynamics), Optimization, Temperature, Tiles, Refrigeration, Fans
Proceedings Papers

Energy Modeling of Air-Cooled Data Centers: Part I—The Optimization of Enclosed Aisle Configurations

Dustin W. Demetriou, H. Ezzat Khalifa
Proc. ASME. InterPACK2011, ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems, MEMS and NEMS: Volume 2, 385-394, July 6–8, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2011-52003
https://doi.org/10.1115/IPACK2011-52003
View Paper titled, Energy Modeling of Air-Cooled Data Centers: Part I—The Optimization of Enclosed Aisle Configurations
Open the PDF for Energy Modeling of Air-Cooled Data Centers: Part I—The Optimization of Enclosed Aisle Configurations in another window
Topics: Data centers, Modeling, Optimization, Temperature, Energy consumption, Cooling, Flow (Dynamics), Air conditioners, Computers, Containment
Proceedings Papers

Energy Modeling of Air-Cooled Data Centers: Part II—The Effect of Recirculation on the Energy Optimization of Open-Aisle, Air-Cooled Data Centers

Dustin W. Demetriou, H. Ezzat Khalifa
Proc. ASME. InterPACK2011, ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems, MEMS and NEMS: Volume 2, 395-404, July 6–8, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2011-52004
https://doi.org/10.1115/IPACK2011-52004
View Paper titled, Energy Modeling of Air-Cooled Data Centers: Part II—The Effect of Recirculation on the Energy Optimization of Open-Aisle, Air-Cooled Data Centers
Open the PDF for Energy Modeling of Air-Cooled Data Centers: Part II—The Effect of Recirculation on the Energy Optimization of Open-Aisle, Air-Cooled Data Centers in another window
Topics: Data centers, Modeling, Optimization, Cooling, Temperature, Energy consumption, Air flow, Flow (Dynamics), High temperature, Temperature nonunifomity
Proceedings Papers

Evaluation of a Data Center Recirculation Non-Uniformity Metric Using Computational Fluid Dynamics

Dustin W. Demetriou, H. Ezzat Khalifa
Proc. ASME. InterPACK2011, ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems, MEMS and NEMS: Volume 2, 405-414, July 6–8, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2011-52005
https://doi.org/10.1115/IPACK2011-52005
View Paper titled, Evaluation of a Data Center Recirculation Non-Uniformity Metric Using Computational Fluid Dynamics
Open the PDF for Evaluation of a Data Center Recirculation Non-Uniformity Metric Using Computational Fluid Dynamics in another window
Topics: Computational fluid dynamics, Data centers, Temperature, Buoyancy, Flow (Dynamics), Tiles, Engineering simulation, Simulation, Cooling, Energy consumption
Proceedings Papers

Design of Simulated Server Racks for Data Center Research

James F. Smith, Waleed A. Abdelmaksoud, Hamza S. Erden, John F. Dannenhoffer, Thong Q. Dang, H. Ezzat Khalifa, Roger R. Schmidt, Madhusudan Iyengar
Proc. ASME. InterPACK2011, ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems, MEMS and NEMS: Volume 2, 415-422, July 6–8, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2011-52016
https://doi.org/10.1115/IPACK2011-52016
View Paper titled, Design of Simulated Server Racks for Data Center Research
Open the PDF for Design of Simulated Server Racks for Data Center Research in another window
Topics: Data centers, Design, Server racks, Computers, Fans, Heating, Temperature, Density, Flow (Dynamics), Pressure drop
Proceedings Papers

Reduced Rack Exhaust Temperature Gradient via Variable Chassis Flow Rate

Thong Dang, Carine Serreli, H. Ezzat Khalifa, Roger R. Schmidt, Madhusudan Iyengar
Proc. ASME. InterPACK2011, ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems, MEMS and NEMS: Volume 2, 451-459, July 6–8, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2011-52067
https://doi.org/10.1115/IPACK2011-52067
View Paper titled, Reduced Rack Exhaust Temperature Gradient via Variable Chassis Flow Rate
Open the PDF for Reduced Rack Exhaust Temperature Gradient via Variable Chassis Flow Rate in another window
Topics: Exhaust systems, Flow (Dynamics), Temperature gradient, Temperature, Algorithms, Computational fluid dynamics, Data centers, Engineering simulation, Heat, Simulation