Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"Cold plate"”.
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Model of reflectance of thermophotovoltaic cell and cold plate
The reflectivity of a gold-plated cold plate, and mounted multi-junction photovoltaic cells, is studied in the context of a thermal energy grid storage system. The emitter is modeled as a black body emitter. Improving the efficiency of the system requires high reflectance below the bandgap energy …
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Enhancement of nucleate boiling heat transfer by surface modification in a cold plate evaporator
… modification with R134a in a microchannel cold plate evaporator. Internal copper and brass surfaces were modified with the deposition of copper oxide nanostructures with the intention of improving nucleate boiling heat transfer. The spike-like nanostructures increase the real internal …
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Microchannel Thermal Management Analysis and Simulation Tool for Integration into Electronic Component Design
This study focuses on the use of microchannel cold plates as a thermal management solution. The goal of the study was to build the Microchannel Simulation Library Tool (MSLT), which allows cold plate designers to analyze possible solutions to electronic component cooling. The MSLT relies on a …
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Heat Pipes for the Thermal Management of High Frequency Transformers in the Navy integrated Power Electronics Building Block
… indirect liquid cooling using a detached cold plate is being studied; however, preliminary analysis revealed concerns regarding the hot spot temperatures of the transformer using this approach. This thesis explored the feasibility of using heat pipes to supplement the cooling provided by …
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Development and modeling of novel battery thermal management systems for electric and hybrid electric vehicles
… is the tube based system, where the aluminum cold plate has tubes completely filled with coolant to maintain the battery temperature within range needed for the best performance possible by the system. The tube cold plate based system maintains 80% less coolant in the battery pack at a time …
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Thermal Analysis of Indirect Liquid Cooling for the Navy integrated Power Electronics Building Block
… iPEBB unit in dry contact with a liquid-cooled cold plate, has been chosen as a potential thermal solution. A half-iPEBB thermal model was created and tested in steady state using computational fluid and thermal simulation. The chosen cold plate design using a flow rate of 8.4 gpm and inlet …
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New components for dynamic modeling of transient thermal systems
… from an in-floor heating system to a small cold plate. Finally, the third component is a liquid-to-two phase heat exchanger, which can be used with the liquid-to-solid heat exchanger or separately, as the user desires. Qualitative analyses of the liquid-to-solid and liquid-to-two phase heat …
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Design of motor controller water cooling system for a Formula SAE electric racecar
This thesis explores the design of a water cooled cold plate system for motor controller used in an FSAE Electric racecar. Models for pressure drop and rate of heat transfer along with the constuction of Computational Fluid Dynamics (CFD) simulations are presented to predict the pressure drop and …
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Modeling of a Single-Phase Liquid Cooling System for Power Electronics Applications
… system. The system utilizes a plastic insert cold plate design to provide even cooling over the backside of a power electronics device by directing coolant through parallel serpentine channels. Material selection and compression set testing evaluated suitable elastomers for seals and polymers …
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Separação de misturas líquidas em escoamento pelicular por meio de radiação térmica
… a liquid film that flows over a heated inclined plate. The vapor condenses in contact with a cold plate, parallel to and on top of the first one, fornling also a liquid film. In the maciel are analysed a) the process of heat transfer through the films and the change of phase, as first proposed by …
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Phase-field simulation of freezing water droplet
When a water droplet freezes on a cold plate, a pointy tip forms as the result of volume expansion. In this dissertation, we will introduce a quasi-compressible phase-field model that deals with this non-isothermal three-phase system involving water, ice, and air. The water-ice phase transition and …
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Experimental Validation of Indirect Liquid Cooling Computational Thermal Modeling
… is to predict the liquid flow rate through a cold plate given a heat flux which will keep the iPEBBs below 100◦C. Experimental data on indirect liquid cooling of a layered substrate was collected with varied power, temperatures and flow rates. The data was verified through a STAR-CCM+ CFD …
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Design of a high performance liquid-cooled lithium-ion battery pack for automotive applications
… soldering the negative terminal of electroplated 18650 battery cells directly to a metal core printed circuit board material as the critical cell-to-water interface that provides high thermal conductivity while maintaining electrical isolation. Cold plate design, sealing, and manufacturing …
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Cooling Power Electronic Building Blocks Aboard Navy Ships
… dry interface. This is achieved by hard-mounting cold plates in the electronics cabinet, placing the heat-transfer surface of each PEBB adjacent to a cold plate, and improving heat transfer across the interface through the use of a thermal pad. The thesis presents initial thermal and structural …
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Development, Characterization, & Implementation of Phase-Change Material Cold Plates for Hybrid-Electric Vehicle Battery Systems
… use of a shape-stabilized phase-change material cold plate that is capable of addressing several issues that a represent with the bulk PCM plate in its current state on the vehicle.</p>
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Thermal Management of Power Electronic Building Blocks
… a lower quality heat sink. Both forced air and cold plate cooling methods were found acceptable; factors such as environment, cost and integration will determine which solution is most feasible. Maximum surface temperatures can be lowered somewhat through adjustment of device spacing. However, …
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Antarctic sea ice phytoplankton growth rates and survival mechanisms
… and irradiation control by making use of a cold plate attached to a chiller and an LED light. Experiments conducted on the diatom species revealed that all the sea ice species were shade adaptive being photo inhibited at irradiances beyond 42μmolm-2s-1 with the exception of Navicula spp, …
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Characterizing the Thermal Behavior of Pyrolytic Graphite Sheets (PGS) at Low Interface Pressures
… the thermal interface material (TIM) between the cold plate and iPEBB, was explored in a multitude of ways. First, commercially available TIMs were investigated for their thermal behavior at pressures less than 10 PSI as well as their structural qualities and usability metrics. Pyrolytic Graphite …
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Scalable and durable macro-micro-nanomanufacturing of functional interfaces and devices
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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Experimental investigation and modeling of lithium-ion battery cells and packs for electric vehicles
… sized prismatic LiFePO4 battery is cooled by two cold plates and nineteen thermocouples and three heat flux sensors are applied to the battery at distributed locations. The experimental results show that the temperature distribution is greatly affected by both the discharge rate and BCs. The …
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