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Filtering by: Creator Loughborough, W. Karl Remove constraint Creator: Loughborough, W. Karl Advisor Paul, Brian K. Remove constraint Advisor: Paul, Brian K.

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  • 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

  • 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

  • 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:
    ............................................................................................................................ 53 Figure 36: Temperature difference due to an applied heat load of 52 W at various flow rates

  • 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

  • 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

  • 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
    Full Text:
    : the manufacturing factory. In 1907, Frederick W. Taylor, the father of IE, published “On the Art

  • Development of an economical high temperature microchannel recuperator for solid oxide fuel cells

    Creator:
    Brannon, Samuel T.
    Abstract:
    To improve the performance of solid oxide fuel cells, a secondary power cycle can be driven by the recuperation of exhaust gas heat. Microchannel recuperators are attractive for waste heat recuperation due to compact form factors which also minimize the mass of the expensive superalloys required. This paper introduces a...
    Resource Type:
    Masters Thesis
    Full Text:
    ] 218 151 Density [Kg/m3] 8050 8050 Thermal Conductivity [W/m-K] 12 31.4 Haynes 214 Material

  • 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

  • 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:
    -1 Experimental dispense tool nozzle scan speed 𝑊 mm Total ERV core width 𝑌

  • 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