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.
Results
Showing 1 to 20 of 256 for “"operating temperature"”.
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Measurement of operating temperature in spark ignition engine
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1959.
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Drift performance vs. operating temperature in a low-cost strapdown gyroscope.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
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Modeling of operating temperature performance of triple junction solar cells using Silvaco's ATLAS
The inefficiency of solar cells due to high operating temperatures presents a growing issue for the spacecraft industry. Currently, the problem is solved by accepting the manufactured designs and compensating for losses with larger solar arrays. Building upon prior thesis work at the Naval …
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Enabling multi-cation electrolyte usage in LMBs for lower cost and operating temperature
… developed such that lower cost and lower melting temperature multi-cation electrolytes could be incorporated in liquid metal batteries (LMBs). In a first part of this work, Lithium-magnesium was proven to be a viable anode in a standard uni-cation (Li+) Li-Mg/LiCl-LiF-LiI/Sb-Pb battery. SEM and …
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Optimum operating temperature for refining light oil with sulfuric acid in coke oven by-product recovery
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1943.
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Nickel-based superalloy operating temperature determination via analysis of gamma/gamma' microstructure and coating/base material interdiffusion
The average operating temperature of RENÉ N5® high pressure turbine blades was evaluated via [gamma]/[gamma]' microstructure and coating/base metal interdiffusion methods. The [gamma]' volume fraction was measured by point counting and direct area measurement. The data, however, were found …
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Modeling the impact of feedstock composition and operating temperature on carbon sequestration potential of fecal sludge-derived biochar
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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The effect of ammonial loading, solids retention time and operating temperature on the biological nitrification and denitrification of high ammonia landfill leachate
… of ammonia loading, solids retention time and operating temperature (20, 17, 14, 12 and 10 °C) on the treatment of high ammonia landfill leachate (200, 300, 600, 1000, 1500 and 2000 mg NH4-N/L), was investigated. Two biological, single-sludge, nitrification-predenitrification systems were …
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Molten Salt Nanomaterials for Thermal Energy Storage and Concentrated Solar Power Applications
… solar power (CSP) system depends on the maximum operating temperature of the system which is determined by the operating temperature of the TES device. Organic materials (such as synthetic oil, fatty acid, or paraffin wax) are typically used for TES. This limits the operating temperature of CSP …
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High temperature fiber optic strain sensing
Two high temperature fiber optic based strain sensors have been developed for use in a coal combustor environment. An intensity based sensor uses losses created by longitudinal misalignment as a sensing mechanism and has a maximum operating temperature of 700°C. An interferometric based sensor …
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New frontiers in THz quantum cascade lasers
… environment. Therefore, raising the maximum operating temperature to above that of a compact cooler (>/= 235 K for single-stage thermoelectric coolers), has been a paramount long-term goal in the THz field. In this thesis, THz QCLs (at ~~ 4 THz) with a maximum operating temperature …
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Synthesis, Fabrication and Surface Modification of Nanocrystalline Nickel Oxide for Electronic Gas Sensors
… The effect of thickness, fabricating technique, operating temperature, post laser irradiation and metallization on the gas sensing behavior of nickel oxide have been studied. The microstructure, optical and electrical properties of coated film were studied by XRD, SEM, TEM, EDAX, XPS, UV-Vis …
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An investigation into increased productivity of small scale anaerobic digesters by means of temperature management
… may be warm waste water on site to elevate the operating temperature and thus improve gas yield. This dissertation reports an experiment aimed at improving the performance of an existing anaerobic digester located at the Leo Marquard Hall (LMH) residence of the University of Cape Town. The 6 m³ …
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Synthesis of perovskite-ceria composites for solar-to-fuel conversion
… kinetics for this process but have a very high operating temperature. In contrast, perovskites have the advantage of a lower operating temperature but it comes at the expense of lower production rates. Composites containing ceria/GDC/YSZ and perovskite were synthesized to explore synergies that …
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Impact of operating conditions on thermal hydrolysis pre-treated digestion return liquor
… employing THP pretreatment. The impact of operating conditions of the THP on dissolved organic nitrogen (DON) and UV absorbance in return liquor was investigated. Operating conditions studied were (1) operating temperature (2) solids retention time (SRT) in the anaerobic digester (3) THP …
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Design and Simulation of Passive Thermal Management System for Lithium-Ion Battery Packs on an Unmanned Ground Vehicle
… between internal components. The maximum temperature of the batteries reached 65.6 <strong>°</strong>C after 630 seconds of usage at a simulated peak power draw of 3,600 watts or roughly 85 amps. This exceeds the manufacturer's maximum recommended operating temperature of 60 …
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Experimental investigation and analyses of continuous type hybrid photoelectrochemical hydrogen production systems
… the present reactor is tested under four temperatures (20, 40, 60, and 80°C) and three inlet mass flow rates (0.25, 0.50, and 0.75 g/s). Furthermore, PEC-based processes are tested under two light settings (600 and 1200 W/m2). These results are compared to the thermodynamic model outputs. …
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MIT Electric Vehicle Team Porsche designing a cooling system for the AC24 electric motor
… the maximum power of the motor. The maximum operating temperature of the motor is listed as 55C. The power limitation prevented the vehicle from achieving its top possible speeds, reaching only 87mph when it should get to over 100mph. To solve this problem, I designed a heat-exchanger system …
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Development of the capability of testing the accuracy of thermal CAD software for electronic circuit design
The capability of measuring surface temperatures of hybrid circuits at the Virginia Tech Hybrid Microelectronics Laboratory has been established. This capability provides a quantitative method for effectively evaluating thermal design software. Surface operating temperatures were measured and …
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Heat Transfer and Flow in Solar Energy and Bioenergy Systems
… this novel storage material and concrete at a temperature range from 400 °C to 500 °C. It is recommended to apply this novel thermal storage material to replace concrete at high operating temperatures in sensible heat TES systems. The second part of this dissertation mainly focuses on the …
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