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 52 for “"Combustion efficiency"”.
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Combustion efficiency in internal combustion engines
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1985.
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Combustion efficiency improvement in a rotary furnance using a post combustion chamber
Combustion Efficiency Improvement in a Rotary Furnace using a Post Combustion Chamber. Luwaya Edwin. Department of Mechanical Engineering, University of Zambia.Geometric parameters, of a rotary furnace, necessary for the improvement of combustion efficiency are analysed using Computational Fluid …
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Combustion efficiency improvement in a rotary furnance using a post combustion chamber
Combustion Efficiency Improvement in a Rotary Furnace using a Post Combustion Chamber. Luwaya Edwin. Department of Mechanical Engineering, University of Zambia.Geometric parameters, of a rotary furnace, necessary for the improvement of combustion efficiency are analysed using Computational Fluid …
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Development Of A Unified Approach (An Index) To Study The Particulate, Carbon Monoxide Emissions And The Combustion Efficiency Using Field And Laboratory Investigations
… pollutants which are the products of incomplete combustion. Previously, studies have been done to study the PM2.5, CO, methane and non methane compounds to study the dose exposure relationships of the cookstoves. One major drawback in these studies was that they didn’t use the surface area of …
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Conceptual evaluation of hydrogen hybrid combustion for heavy-duty engines using CFD modelling
Hydrogen is a promising fuel for internal combustion engines (ICEs) due to its combustion properties and potential for zero carbon/low nitrogen oxide emissions. This study investigates a novel hydrogen combustion concept for heavy-duty engines using pre-chamber ignition technology operating in a …
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The analytical design of a turbo-jet combustion chamber.
A "can" type combustion chamber was designed using all available proved concepts. A survey of existing designs was made to arrive at a logical design point. The fact that parallel flow would exist within the chamber was noted, and the burner was designed to obtain the required flow within an equal …
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Development of Lattice-Augmented Fuels for Hybrid Rocket Applications
… but a number of key challenges relating to combustion efficiency and the structural properties of wax-based fuels remain. The current work explores these challenges through the use of an additively-manufactured lattice embedded within the fuel grain. A novel process of generating …
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Neural Network Modelling and Control of Coal Fired Boiler Plant
… The objective of the controller was to increase combustion efficiency and maintain pollutant emissions below future medium term stringent legislation. Artificial Neural Networks (ANNs) were used to estimate future emissions from and control the combustion process. Initial tests at Casella CRE Ltd …
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Fireplace analysis for efficient fuel conversion as an auxiliary system for space heating
… modifications can be performed to improve the combustion efficiency of fireplaces to equal, if not exceed, those of existing fuel conversion devices. This study investigates ways in which the fireplace can be designed to effectively withdraw the heating potential from a given amount of wood and …
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DEVELOPMENT AND TESTING OF A NEW AIR-ASSISTED FLARE SYSTEM FOR LOW FLOW CONDITIONS
… surrounding air and induces more air into the combustion zone. An air-assisted flare system is the preferred flare type in regions where steam is unavailable or is costly to supply or ambient temperatures are too low. The environmental protection agency (EPA) considers flares to be a source of …
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A Study of Combustion in Supersonic Streams
Supersonic combustion of reactive aluminum alkyl fuels has been experimentally demonstrated in two-dimensional ducted combustors and adjacent to a flat plate. Fuel was injected from the combustor walls through multiple orifices and ignited spontaneously. Stable supersonic heat release was …
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A CFD investigation of cavitation and associated deposit formation in modern diesel fuel injectors
… rail pressures to aid atomisation and increase combustion efficiency. However, associated with the high injections pressures is the issue of nozzle cavitation. Cavitation leads to pockets of diesel vapour forming in the nozzle and it is hypothesised that this causes the formation of deposits in …
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Characterization of carbonaceous aerosols from biofuel combustion: emissions and climate relevant properties
… to their prevalence in the atmosphere. Biofuel combustion is responsible for nearly 20% of primary BC and OC emissions, but this source is relatively unstudied. Both emissions and optical properties (especially absorption) of carbonaceous aerosols from biofuel combustion need to be better …
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Experimental Investigation of Gaseous Oxyacetylene Blast Enhancement by the Combustion of Suspended Multimodal Spherical Aluminum Powder
… was to analyze the blast enhancement from the combustion of non-uniform-sized aluminum particles. These multimodal aluminum powders consisted of a 50/50 mixture by mass of larger (~30 μm) and smaller (~1-10 μm) particles. Experiments were conducted at the large-scale Virginia Tech Shock Tube …
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Controlled Oxidation Studies of Coal/Refuse Fuel Blends
A study of the controlled combustion of blends of biomass materials and coals was conducted. Crushed limestone was added to the blends as an absorbent for sulfur oxides. The samples were combusted in quartz-fiber crucibles in a forced air furnace. Combustion at different times and temperatures were …
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Mass Balance of Major, Minor and Trace Elements During AFBC Combustion of Fuels
… and 11 trace elements, in solid coal and coke combustion residues by inductively coupled plasma-atomic emission spectrometry (ICP-AES) were checked for routine use. In this study, the ICP analysis values and XRF analysis values of major and minor elements in two kinds of coal and two kinds of …
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Simulation of Combustion and Thermal-flow Inside a Pyroscrubber
… are developed using FLUENT to simulate the combustion and thermal-flow phenomena inside the pyroscrubber. The results show the 3-D behavior of the flow, the reaction inside the pyroscrubber, effect of different amounts of air injection with respect to combustion efficiency, energy output and …
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The Monitoring and Control of Stoker-Fired Boiler Plant by Neural Networks
… coal boilers with a view to improving the combustion efficiency whilst minimising pollutant emissions. A novel Neural Network Based Controller (NNBC) was developed following a comprehensive set of experiments carried out on a stoker test facility at the Coal Research Establishment (CRE) …
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Field emission measurements of solid fuel stoves in Yunnan, China
… (OC), and elemental carbon (EC), as well as combustion efficiency and particle optical properties were measured during 37 uncontrolled cooking tests of residential stoves in Yunnan Province, China. Fuel mixtures included coal, woody biomass, and agricultural waste. Compared to previously …
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