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 44 for “"EXHAUST GASES"”.
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The transport and remote oxidation of compartment fire exhaust gases
… studies have investigated the composition of the exhaust gases during transport to remote locations. The goal of this study was to investigate fire exhaust gas transport through a hallway to determine the important parameters affecting the efficiency of sustained external burning in oxidizing …
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Motor vehicle air-conditioning : utilising the exhaust gas energy to power an absorption refrigeration cycle
… that a lot of heat energy associated with the exhaust gases from an engine is wasted. The work described in this thesis attempts to use the energy from the motor car's exhaust gases to power an air-conditioning system. Thus the waste heat can be utilised and shaft power conserved by replacing …
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Development of a One and Two-Dimensional Model for Calculating Pore Pressure in an Ablating Thermal Sacrificial Liner
… the thermal and chemical effects of the heated exhaust gas that flows through the nozzle. However, in the design process space and weight of the rocket are at a premium. The sacrificial liners need to be designed to be as light and thin as possible, while properly shielding the nozzle from the …
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In Cylinder NOx Control Technologies for Marine Diesel Engines
… period (valve overlap) to increase the amount of exhaust gases in the combustion chamber. However, the remarkably high boost pressure levels needed for such extreme Miller cycles, require mandatorily the use of two stage turbocharging systems. Despite two stages turbocharging, combined with …
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The application of quantum cascade lasers to mid-infrared gas sensing
… sensors have since been used to study the exhaust gases produced by a variety engine types ranging from cars to ships as well as atmospheric measurements.
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Temperature, pressure, and infrared image survey of an axisymmetric heated exhaust plume
… predict an infrared image of a jet engine exhaust plume, given field variables such as temperature, pressure, and exhaust plume constituents as a function of spatial position within the plume, and to compare this predicted image directly with measured data. This work is motivated by the …
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Gas chromatographic determination of carbon dioxide, carbon monoxide, and nitric oxide in diesel exhaust
… carbon monoxide, and nitric oxide in diesel exhaust was developed. A gas chromatograph containing a liquid phase column in series with a molecular sieve column, each of which eluted into thermal conductivity detectors, was utilized. Activation of the molecular sieve column was achieved by …
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Farm waste management: the effects of fine bubble aeration on cattle slurry and the fate of ammonia during the treatment process
… culture upon N species within the slurry. The exhaust gases from the aeration bioreactors passed through a chemical capture system. Slurry samples were obtained during treatment to establish the chemical and biological changes. Finally, the effect of aeration on the fertiliser value of the …
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A study of the high speed diesel engine exhaust with respect to gas composition and smoke density
A study of exhaust gas composition at various engine speeds, loads, and cooling water temperatures was made on an International Harvester UD-6 Diesel Engine. Simultaneously, smoke density was measured with a smokemeter, the principle of which was based on the obstruction of light. Exhaust gases …
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In-situ investigation and mitigation of carbon support corrosion of cathode catalyst in PEM fuel cells
… mass spectrometry (DEMS) spectra of cathode exhaust gases, CO₂, H₂ and O₂, from a PEMFC fed with humidified H₂ and He to the anode and cathode respectively. Furthermore, the catalytic effects on CSC from different oxidation states of Pt were indicated. To determine the oxygen sources and …
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A study of gas-solids flows at very high speed
… the flow of suspensions of solids particles in gases at high flow velocities has been carried out. A literature survey into gas-solids flow at both low and high speeds has revealed that most of the existing work on high speed flows is of a theoretical nature and has been stimulated as a result …
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Synthesis and Catalytic Applications of Ni-Based Single-Atom and Nanoparticle Catalysts Supported on UiO-66-NH2
… is the recycling and utilization of industrial exhaust gases, particularly the high-value utilization of carbon dioxide emissions. In this project, we focus on the C1-level transformation of CO₂. UiO-66-NH2, as a novel metal-organic framework, possesses unique features such as excellent specific …
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Heat transfer between a supernatant gas and a flowing vibrofluidized bed of solid particles
… a novel process for heat recovery from hot exhaust gases. This process involves direct contact of a hot gas with a countercurrently flowing vibrofluidized bed of cold solid. Based on a simple heat-transfer model, an "apparent" heat-transfer coefficient between the air and solid was …
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Sintering of metal nanoparticles on model substrates
… catalysis, for the catalytic converter, the exhaust gases from automobiles contain carbon monoxide, nitrogen oxide compounds, and other hydrogen compounds, which are detrimental to the atmosphere, and a catalyst is required to convert these gasses into less harmful gases, such as nitrogen, …
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Development of a quasi-dimensional diesel engine simulation for energy and availability analysis
… and less than 60% of the energy contained in the exhaust gases can be recovered using ideal thermodynamic devices. It is also shown that the model produces expected trends under different engine operating conditions.
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Evaluation of Internal Fin Geometry for Heat Transfer Enhancement in Automobile Exhaust Energy Harvesting Systems
… potential in harvesting energy from automobile exhaust. TEGs in form of an appropriate TEG- Heat exchanger module can utilize the temperature difference between the hot exhaust gases and the automobile coolant and convert it into electrical voltage. The amount of power is anticipated to be a few …
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Fabrication and Testing of a Heat Exchanger Module for Thermoelectric Power Generation in an Automobile Exhaust System
… In applying TEGs to the outside of the exhaust tailpipe of a vehicle, the difference in temperature between the hot exhaust gases and the automobile coolant can be used to generate a small amount of electrical power to be used in the vehicle. The amount of power is anticipated to be a …
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Prediction of erosion in cementitious materials subject to high thermal and pressure loading
… of failure in limestone concrete, due to hot jet exhaust gases impinging on the concrete surface. The temperature distribution was produced using a constant jet temperature with a standard finite difference approximation and the thermal properties of concrete which varied with respect to …
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Analysis of gas phase composition in fuel and exhaust gas in Solid Oxide Fuel Cells
… 10 (mass 288). Mass spectroscopic analyses of exhaust gases from SOFC test systems are provided, with and without Ni/YSZ anodes in the path of the gas flow. The mass spectrometer, a MKS Cirrus system, has a mass range of 1--100 amu and a detection limit of ∼0.001 torr. The mass spectrometry …
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The effect of complexes on combustion
… Also by placing a catalyst converter in the exhaust system partial oxidation products may be converted to more desirable final products. Finally, in this research the net catalytic effect of using an additive treated fuel and a blank ceramic monolith to trap the metal in the exhaust gases for …
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