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Proceedings Papers

Mathematical Model for Thermostatic Expansion Valve

Yiwu Ding, Dereje Agonafer, Roger Schmidt
Proc. ASME. IMECE2000, Packaging of Electronic and Photonic Devices, 285-292, November 5–10, 2000
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2000-2275
https://doi.org/10.1115/IMECE2000-2275
View Paper titled, Mathematical Model for Thermostatic Expansion Valve
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Topics: Thermostatics, Valves, Cooling, Electronics, Evaporation, Refrigeration, Steady state, Temperature
Journal Articles

Effects of Gaseous and Particulate Contaminants on Information Technology Equipment Reliability—A Review

Satyam Saini, Jimil M. Shah, Pardeep Shahi, Pratik Bansode, Dereje Agonafer, Prabjit Singh, Roger Schmidt, Mike Kaler
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Review Articles
J. Electron. Packag. September 2022, 144(3): 030801.
Paper No: EP-20-1054
https://doi.org/10.1115/1.4051255
Published Online: September 15, 2021
View Article titled, Effects of Gaseous and Particulate Contaminants on Information Technology Equipment Reliability—A Review
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Topics: Contamination, Corrosion, Data centers, Particulate matter, Reliability, Temperature, Copper, Silver, Failure
Proceedings Papers

Comparative Analysis of Different In Row Cooler Management Configurations in a Hybrid Cooling Data Center

Tianyi Gao, Bahgat G. Sammakia, James Geer, Bruce Murray, Russell Tipton, Roger Schmidt
Proc. ASME. InterPACK2015, Volume 1: Thermal Management, V001T09A011, July 6–9, 2015
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2015-48069
https://doi.org/10.1115/IPACK2015-48069
View Paper titled, Comparative Analysis of Different In Row Cooler Management Configurations in a Hybrid Cooling Data Center
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Topics: Cooling, Data centers, Coolers, Energy consumption, Cooling systems, Density, Heat, Temperature, Coal, Computational fluid dynamics
Proceedings Papers

Raised Floor Hybrid Cooled Data Center: Effect on Rack Inlet Air Temperatures When In Row Cooling Units are Installed Between the Racks

Tianyi Gao, James Geer, Russell Tipton, Bruce Murray, Bahgat G. Sammakia, Alfonso Ortega, Roger Schmidt
Proc. ASME. InterPACK2015, Volume 1: Thermal Management, V001T09A012, July 6–9, 2015
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2015-48071
https://doi.org/10.1115/IPACK2015-48071
View Paper titled, Raised Floor Hybrid Cooled Data Center: Effect on Rack Inlet Air Temperatures When In Row Cooling Units are Installed Between the Racks
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Topics: Cooling, Data centers, Temperature, Heat, Air flow, Computational fluid dynamics, Cooling systems, Stress, Computer simulation, Density
Proceedings Papers

Experimental and Numerical Characterization of a Raised Floor Data Center Using Rapid Operational Flow Curves Model

Husam A. Alissa, Kourosh Nemati, Bahgat Sammakia, Mark Seymour, Ken Schneebeli, Roger Schmidt
Proc. ASME. InterPACK2015, Volume 1: Thermal Management, V001T09A016, July 6–9, 2015
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2015-48234
https://doi.org/10.1115/IPACK2015-48234
View Paper titled, Experimental and Numerical Characterization of a Raised Floor Data Center Using Rapid Operational Flow Curves Model
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Topics: Data centers, Flow (Dynamics), Modeling, Computational fluid dynamics, Pressure, Tiles, Boundary-value problems, Cooling, Dimensions, Ducts
Journal Articles

Steady State and Transient Experimentally Validated Analysis of Hybrid Data Centers

Tianyi Gao, Bahgat Sammakia, Emad Samadiani, Roger Schmidt
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Research-Article
J. Electron. Packag. June 2015, 137(2): 021007.
Paper No: EP-14-1041
https://doi.org/10.1115/1.4029163
Published Online: June 1, 2015
View Article titled, Steady State and Transient Experimentally Validated Analysis of Hybrid Data Centers
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Topics: Cooling, Data centers, Doors, Failure, Heat exchangers, Steady state, Temperature, Water, Cooling systems, Air flow
Proceedings Papers

Experimentally Verified Transient Models of Data Center Crossflow Heat Exchangers

Tianyi Gao, Bahgat Sammakia, James Geer, Milnes David, Roger Schmidt
Proc. ASME. IMECE2014, Volume 10: Micro- and Nano-Systems Engineering and Packaging, V010T13A081, November 14–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2014-36022
https://doi.org/10.1115/IMECE2014-36022
View Paper titled, Experimentally Verified Transient Models of Data Center Crossflow Heat Exchangers
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Topics: Data centers, Heat exchangers, Transients (Dynamics), Computational fluid dynamics, Coolers, Cooling systems, Doors, Simulation, Air conditioners, Computers
Proceedings Papers

A Numerical Study for Contained Cold Aisle Data Center Using CRAC and Server Calibrated Fan Curves

Sami A. Alkharabsheh, Bahgat G. Sammakia, Saurabh Shrivastava, Roger Schmidt
Proc. ASME. IMECE2013, Volume 10: Micro- and Nano-Systems Engineering and Packaging, V010T11A085, November 15–21, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2013-65145
https://doi.org/10.1115/IMECE2013-65145
View Paper titled, A Numerical Study for Contained Cold Aisle Data Center Using CRAC and Server Calibrated Fan Curves
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Topics: Data centers, Pressure, Computational fluid dynamics, Containment systems, Flow (Dynamics), Stress, Temperature distribution, Air conditioners, Air flow, Ceilings
Proceedings Papers

Computational Study of Air Cooled Data Centers Assisted With Locally Distributed Water to Air Heat Exchangers

Tianyi Gao, Bahgat Sammakia, Roger Schmidt
Proc. ASME. IMECE2013, Volume 10: Micro- and Nano-Systems Engineering and Packaging, V010T11A089, November 15–21, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2013-65958
https://doi.org/10.1115/IMECE2013-65958
View Paper titled, Computational Study of Air Cooled Data Centers Assisted With Locally Distributed Water to Air Heat Exchangers
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Topics: Data centers, Heat exchangers, Water, Heat, Cooling, Air flow, Stress, Temperature, Thermal management, Density
Proceedings Papers

A Numerical Steady State and Dynamic Study in a Data Center Using Calibrated Fan Curves for CRACs and Servers

Sami A. Alkharabsheh, Bahgat Sammakia, Saurabh Shrivastava, Michael Ellsworth, Milnes David, Roger Schmidt
Proc. ASME. InterPACK2013, Volume 2: Thermal Management; Data Centers and Energy Efficient Electronic Systems, V002T09A020, July 16–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2013-73217
https://doi.org/10.1115/IPACK2013-73217
View Paper titled, A Numerical Steady State and Dynamic Study in a Data Center Using Calibrated Fan Curves for CRACs and Servers
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Topics: Data centers, Steady state, Flow (Dynamics), Temperature, Buoyancy, Dynamic models, Energy dissipation, Failure, Air flow, Approximation
Proceedings Papers

Dynamically Controlled Long Duration Operation of a Highly Energy Efficient Chiller-Less Data Center Test Facility

Milnes P. David, Pritish R. Parida, Mark D. Schultz, Robert E. Simons, Michael Gaynes, Roger Schmidt, Timothy J. Chainer
Proc. ASME. InterPACK2013, Volume 2: Thermal Management; Data Centers and Energy Efficient Electronic Systems, V002T09A014, July 16–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2013-73183
https://doi.org/10.1115/IPACK2013-73183
View Paper titled, Dynamically Controlled Long Duration Operation of a Highly Energy Efficient Chiller-Less Data Center Test Facility
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Topics: Data centers, Test facilities, Cooling, Energy consumption, Water, Energy efficiency, Computers, Water temperature
Proceedings Papers

Comparative Thermal and Energy Analysis of a Hybrid Cooling Data Center With Rear Door Heat Exchangers

Tianyi Gao, Emad Samadiani, Bahgat Sammakia, Roger Schmidt
Proc. ASME. InterPACK2013, Volume 2: Thermal Management; Data Centers and Energy Efficient Electronic Systems, V002T09A007, July 16–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2013-73101
https://doi.org/10.1115/IPACK2013-73101
View Paper titled, Comparative Thermal and Energy Analysis of a Hybrid Cooling Data Center With Rear Door Heat Exchangers
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Topics: Cooling, Data centers, Doors, Energy consumption, Heat exchangers
Proceedings Papers

Dynamic Analysis of Hybrid Cooling Data Centers Subjects to the Failure of CRAC Units

Tianyi Gao, Emad Samadiani, Roger Schmidt, Bahgat Sammakia
Proc. ASME. InterPACK2013, Volume 2: Thermal Management; Data Centers and Energy Efficient Electronic Systems, V002T09A015, July 16–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2013-73196
https://doi.org/10.1115/IPACK2013-73196
View Paper titled, Dynamic Analysis of Hybrid Cooling Data Centers Subjects to the Failure of CRAC Units
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Topics: Cooling, Data centers, Dynamic analysis, Failure, Cooling systems, Water, Doors, Emergencies, Heat exchangers, Temperature
Proceedings Papers

System-Level Design for Liquid Cooled Chiller-Less Data Center

Pritish R. Parida, Timothy Chainer, Madhusudan Iyengar, Milnes David, Mark Schultz, Michael Gaynes, Vinod Kamath, Bejoy Kochuparambil, Robert Simons, Roger Schmidt
Proc. ASME. IMECE2012, Volume 9: Micro- and Nano-Systems Engineering and Packaging, Parts A and B, 1127-1139, November 9–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2012-88957
https://doi.org/10.1115/IMECE2012-88957
View Paper titled, System-Level Design for Liquid Cooled Chiller-Less Data Center
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Topics: Data centers, Design, Cooling, Energy consumption, Air conditioning, Computer simulation, Computers, Electronics, Refrigeration, Test facilities
Proceedings Papers

Transient Analysis for Contained-Cold-Aisle Data Center

Sami A. Alkharabsheh, Mahmoud Ibrahim, Saurabh Shrivastava, Roger Schmidt, Bahgat Sammakia
Proc. ASME. IMECE2012, Volume 9: Micro- and Nano-Systems Engineering and Packaging, Parts A and B, 1167-1174, November 9–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2012-89681
https://doi.org/10.1115/IMECE2012-89681
View Paper titled, Transient Analysis for Contained-Cold-Aisle Data Center
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Topics: Data centers, Transient analysis, Containment, Computational fluid dynamics, Steady state, Temperature distribution, Transients (Dynamics), Air conditioning, Ceilings, Computer simulation
Proceedings Papers

Effect of Thermal Characteristics of Electronic Enclosures on Dynamic Data Center Performance

Mahmoud Ibrahim, Siddharth Bhopte, Bahgat Sammakia, Bruce Murray, Madhusudan Iyengar, Roger Schmidt
Proc. ASME. IMECE2010, Volume 4: Electronics and Photonics, 411-420, November 12–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2010-40914
https://doi.org/10.1115/IMECE2010-40914
View Paper titled, Effect of Thermal Characteristics of Electronic Enclosures on Dynamic Data Center Performance
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Topics: Data centers, Temperature, Buoyancy, Computer simulation, Computers, Air conditioning, Boundary-value problems, Computational fluid dynamics, Cooling, Dynamics (Mechanics)
Proceedings Papers

Rear Door Heat Exchanger Cooling Performance in Telecommunication Data Centers

Venkata Naga Poornima Mynampati, Saket Karajgikar, Ibraheem Sheerah, Dereje Agonafer, Shlomo Novotny, Roger Schmidt
Proc. ASME. IMECE2010, Volume 4: Electronics and Photonics, 405-410, November 12–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2010-40659
https://doi.org/10.1115/IMECE2010-40659
View Paper titled, Rear Door Heat Exchanger Cooling Performance in Telecommunication Data Centers
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Topics: Cooling, Data centers, Doors, Heat exchangers, Telecommunications, Heat, Stress, Density, Energy consumption, Thermal analysis
Proceedings Papers

Energy Savings Through Hot and Cold Aisle Containment Configurations for Air Cooled Servers in Data Centers

Roger Schmidt, Aparna Vallury, 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, 611-616, July 6–8, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2011-52206
https://doi.org/10.1115/IPACK2011-52206
View Paper titled, Energy Savings Through Hot and Cold Aisle Containment Configurations for Air Cooled Servers in Data Centers
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Topics: Containment, Data centers
Proceedings Papers

Experimental Characterization of Server Rack Energy Use at Elevated Ambient Temperatures

Madhusudan Iyengar, Roger Schmidt, Vinod Kamath, Bejoy Kochuparambil
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, 617-622, July 6–8, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2011-52207
https://doi.org/10.1115/IPACK2011-52207
View Paper titled, Experimental Characterization of Server Rack Energy Use at Elevated Ambient Temperatures
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Topics: Energy consumption, Experimental characterization, Server racks, Temperature, Doors, Heat exchangers, Data centers, Stress, Algorithms, Cooling
Proceedings Papers

Energy Efficient Data Centers Using Evaporative Cooling and Air Side Economizers

Madhusudan Iyengar, Roger Schmidt
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, 623-627, July 6–8, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IPACK2011-52210
https://doi.org/10.1115/IPACK2011-52210
View Paper titled, Energy Efficient Data Centers Using Evaporative Cooling and Air Side Economizers
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Topics: Data centers, Evaporative cooling, Cooling, Temperature, Climate, Computers, Energy consumption, Air conditioning, Evaporation, Filtration