Index Catalog // ScholarsArchive@OSU

Energy Analysis of Novel Data Center Cooling Technology : Evaporative Cooling System Operation and Microchannel Heat Exchanger Manufacturing

Creator:: Lajevardi, Babak
Abstract:: Worldwide, many organizations are pursuing higher energy efficiency by reducing power consumption of their processes, systems, and supporting infrastructure. The rapid growth of the information technology (IT) industry and the miniaturization of semiconductors have resulted in substantial increases in energy consumption and power density of IT equipment, and, subsequently, heat...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________________________________ Karl R. Haapala Brian K. Paul Worldwide, many organizations are pursuing higher energy

A microchannel-based thermal management system for hydrogen storage adsorbent beds

Creator:: Steigleder, Leif J.
Abstract:: Hydrogen has been shown to be a promising replacement for fossil fuels for use in light duty vehicles because it is a clean, renewable and plentiful resource with a high gravimetric energy density. However, in order to obtain an acceptable volumetric energy density, densification of the hydrogen is required. Adsorptive...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Leif J

Uniform residence time in microreactor-assisted solution deposition of CdS thin-films for CIGS photovoltaic cells

Creator:: Hires, Clayton Lamar
Abstract:: Photovoltaic (PV) cells have long been an attractive alternative for the consumption of fossil fuels but current manufacturing practices suffer from poor energy efficiency, large carbon footprints, low material utilization, high processing temperatures and high solvent usage. A critical step in PV production is the deposition of CdS as a...
Resource Type:: Masters Thesis
Full Text:: Warnes, Dr. Karl Haapala, and Dr. John Parmigiani for their recommendations, advice and support

Cooling rate limitations in the diffusion bonding of large microchannel arrays

Creator:: Lingam, Gopi K.
Abstract:: A significant barrier to the diffusion bonding of large (i.e. 600 mm) microchannel devices is the large capital investment required to setup production. This large capital investment extends from long heating and cooling cycles leading to poor production capacities. Empirical studies in industry have shown that cooling rate is limited...
Resource Type:: Masters Thesis
Full Text:: Engineering and Dr. Karl Haapala for being on committee. I would like to extend my appreciation to Dr

Manufacturing Process Design and Electrically-Assisted Embossing of a Microchannel Solar Receiver

Creator:: McNeff, Patrick S.
Abstract:: Manufacturing process design (MPD) represents a design-oriented approach to manufacturing engineering. In this dissertation, Haynes 230 (H230), a solid solution-strengthened Ni-based superalloy, was chosen to meet the material requirements of a microchannel solar receiver (MSR) needed to increase the efficiency and reduce the cost of solar thermal power generation. An...
Resource Type:: Dissertation

Laser keyhole welding for microlaminating a high-temperature microchannel array

Creator:: Lajevardi, Babak
Abstract:: Microchannel process technology (MPT) components are chemical unit operations which exploit highly-parallel arrays of microchannels to process large fluid volumes for portable and distributed applications. Microchannel heat exchangers (MCHXs) have demonstrated 3 to 5 times higher heat fluxes when compared to conventional heat exchangers resulting in proportionate reductions in size...
Resource Type:: Masters Thesis
Full Text:: for the advice and support given by my graduate advisory committee Dr. Karl Haapala, Dr. David Kim

Nickel nanoparticles-assisted diffusion brazing of stainless steel 316 for microfluidic applications

Creator:: Tiwari, Santosh K.
Abstract:: Transient liquid-phase diffusion brazing is used in precision, hermetic joining applications as a replacement for diffusion bonding to reduce cycle times, reduce bonding pressure and improve yields. Studies showed that the interlayer used in diffusion brazing can be detrimental due to the use of melting point depressants (MPDs). The goal...
Resource Type:: Dissertation
Full Text:: Rogge, Dr. Karl Haapala and Dr. Vincent Remcho for their time and encouraging suggestions. My

Development of a radial microlamination architecture for cylindrical microchannel arrays

Creator:: Vlieg, James H.
Abstract:: Microchannel arrays are being developed across a wide spectrum of microfluidic applications including blood processing, fuel cells and thermal management among many others. Typical arrays are based on a flat laminated architecture produced in a vacuum hot press (VHP) through solid-state diffusion bonding. Due to the cylindrical nature of certain...
Resource Type:: Masters Thesis
Full Text:: , Dr. Karl Haapala and Dr. Goran Jovanovic, for continued guidance and encouragement. And special

A Manufacturing Process Design for Producing a Membrane-based Energy Recovery Ventilator with High Aspect Ratio Support Ribs

Creator:: Kawula, Steven P.
Abstract:: Heating, ventilation, and air conditioning systems represent nearly half of building energy usage in the United States. Recent building regulations requiring increased air turnover within buildings will result in even greater air conditioning usage. To alleviate these concerns, membrane-based heat-and-moisture exchangers known as energy recovery ventilators have been developed to...
Resource Type:: Masters Thesis
Full Text:: Appendix J: Single Layer and Multilayer Test Article Fabrication Procedure……....109 JA Dispensing and

Adhesive microlamination protocol for low-temperature microchannel arrays

Creator:: Paulraj, Prawin
Abstract:: A new adhesive bonding method is introduced for microlamination architectures, for producing low-temperature microchannel arrays in a wide variety of metals. Sheet metal embossing and chemical etching processes have been used to produce sealing bosses and flow features, resulting in approximately 50% fewer laminae over traditional methods. These lamina designs...
Resource Type:: Dissertation
Full Text:: . Karl Haapala, Dr. Richard Peterson, Dr. Logen Logendran and Dr. Mark Daeschel for their valuable time

ScholarsArchive@OSU

Energy Analysis of Novel Data Center Cooling Technology : Evaporative Cooling System Operation and Microchannel Heat Exchanger Manufacturing

A microchannel-based thermal management system for hydrogen storage adsorbent beds

Uniform residence time in microreactor-assisted solution deposition of CdS thin-films for CIGS photovoltaic cells

Cooling rate limitations in the diffusion bonding of large microchannel arrays

Manufacturing Process Design and Electrically-Assisted Embossing of a Microchannel Solar Receiver

Laser keyhole welding for microlaminating a high-temperature microchannel array

Nickel nanoparticles-assisted diffusion brazing of stainless steel 316 for microfluidic applications

Development of a radial microlamination architecture for cylindrical microchannel arrays

A Manufacturing Process Design for Producing a Membrane-based Energy Recovery Ventilator with High Aspect Ratio Support Ribs

Adhesive microlamination protocol for low-temperature microchannel arrays

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