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 182 for “"thermal efficiency"”.
-
Power Station Thermal Efficiency Performance Method Evaluation
… aligned with the aspiration of improving the thermal efficiency of the coal-fired power plants, was initiated, with a focus on the accuracy of energy accounting. The goal is that: if we can accurately quantify efficiency losses, the effort can be prioritized to resolve the inefficiencies. …
-
Characterizing the thermal efficiency of thermoelectric modules
… the modules in an insulating container and thermal power was provided by a variable power cartridge heater, using type-K thermocouples to measure the temperature difference across the module. The measured parameters were compared against published data on a similar type of module. The …
-
Enhancing Thermal Efficiency Assessment in High-Altitude Footwear
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Managing Memory for Power, Performance, and Thermal Efficiency
… millions of dollars annually. To combat this inefficiency, we propose system software, control systems, and architectural techniques to improve the energy efficiency of high-capacity memory systems while preserving performance. We introduce and discuss several new application-transparent, memory …
-
Thermal Efficiency of Courtyards for Residential Buildings in Iraq
… the courtyard pattern in Iraq to provide a thermally efficient architectural solution that contributes towards solving the housing challenges in the country. As a result of more than three decades of wars and instability, the country suffers from having a large housing shortage and a major …
-
Insights on the Thermal Efficiency of SAGD from Data Analytics
The research in this thesis explores three aspects of Steam-Assisted Gravity Drainage (SAGD) oil recovery using public information, with the aim of uncovering new insights about field performance that cannot be deduced from reservoir physics alone. Topics are chosen by the amount and type of public …
-
A modelling study of the influence of spark-ignition engine parameters on engine thermal efficiency and performance
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1988.
-
Thermal efficiency and emission analysis of advanced thermodynamic strategies in a multi-cylinder diesel engine utilizing valve-train flexibility
… internal combustion engines. Diesel engines are thermally efficient but require complex aftertreatment systems to reduce tailpipe emissions of unburned hydrocarbons (UHC), particulate matter (PM), and nitrogen oxides (NOx). These challenges require research into advanced thermodynamic strategies …
-
Performance and emission characteristics of a gas-diesel engine
… were found to have very strong effects on thermal efficiency and exhaust emissions (ie. NOx, THC, CH₄, CO, CO₂ and BOSCH smoke index). The thermal efficiency and exhaust emissions were determined as a function of load (ie. BMEP). The thermal efficiency of the optimum gas-diesel operation …
-
Performance and emission characteristics of natural gas combined cycle power generation system with steam injection and oxyfuel combustion.
… popularity due to their high power generation efficiency and reduced emission. In the present work, combined cycle power generation configuration systems studied with natural gas as primary fuel oxidizes with air and pure oxygen separately. Steam is injected in main combustion chamber and …
-
The potential of dissociated methanol as a fuel for spark ignition engines
… of dissociated methanol to increase the thermal efficiency or reduce the exhaust emissions of an internal combustion engine. It is assumed that liquid methanol will be dissociated onboard a vehicle using engine waste heat to produce a gas consisting of hydrogen and carbon monoxide in a …
-
Cage culture of channel catfish in a heated effluent from a power plant, Thomas Hill Reservoir
The thermal effluent from electric power plants has been a subject of increased concern because of possible detrimental effects to the enviornment. Power demands in the united states have increased tremendously and may double over the next decade (Yee 1972). The need for electrical power is and …
-
Effects of split injection and exhaust gas recirculation strategies on combustion and emissions characteristics in a modern V6 diesel engine
… injection pressure from 300 to 800 bar, engine thermal efficiency increased from 16.5 to 19.1% and 17.1 to 19.7%, BSFC decreased by 13.5% and 13.2%, smoke level decreased by 74.3% and 70.1% and NOx emissions increased by 69.6% and 68.0%, respectively for a short (5 CAD) and a long (40 CAD) dwell …
-
Hollow fiber membrane-based air gap membrane distillation
Membrane Distillation (MD) is a thermally-driven separation process. In this research, desalination of 1 % NaCl solution is achieved by one type of MD namely, Air Gap Membrane Distillation (AGMD). The characteristics of AGMD are evaluated by using a hollow-fiber-set-based compact device. Hot brine …
-
Stability of Interfaces in a SAGD Steam Chamber
… issue faced by these recovery processes is their thermal efficiency and consequent greenhouse gas emissions and water use. The larger the amount of steam used, the greater the greenhouse gas emissions and water use and the lower the economic viability of the recovery process itself. Thus, the …
-
Thermal performance of backflow solar air heating with integrated nanoparticle enhanced pcm absorber storage system
… to clarify the advantage of using latent thermal storage integrated with a back pass solar air heater (SAH). The purpose of this study is to design, fabricate and evaluate the performance of SAH with integrated nanoparticles enhanced phase change material (PCM) absorber storage system. …
-
Development of thermodynamic cycles for sodium-cooled-fast reactors.
… Power Plants (NPPs) with significantly higher thermal efficiencies compared to current NPPs, and to match, or at least to be close to, the thermal efficiencies reached by fossil-fired power plants, which are currently at the level of 40-62%. As there are six GEN-IV nuclear-reactor concepts and …
-
Modular Plancha Cookstove Design for Capacity Building in Santa Catarina, Guatemala
… also produced in D-Lab to evaluate emissions and efficiency through burn testing. The resulting prototype was a horizontal-feed fiber-reinforced concrete rocket stove with perlite insulation and a plancha (flat stovetop), similar to but smaller than traditional Guatemalan stoves. The size and …
-
Development and characterization of an inertial electrostatic confinement thruster
… of the IEC jet mode were studied. Current, thermal power, thermal efficiency and thrust measurements were obtained. As an addition, helicon plasma injection into the IEC was studied, and based on findings suitable recommendations for the development of the helicon-injected IEC thruster were …
-
Experimental and Numerical Investigation on Particle-gas Flows in Open Vortex-based Solar Cavity Receivers
… safety risks, environmental pollution, and thermal efficiency issues all result from particle egress through the open aperture. Therefore, it is both essential and critical to mitigate, or even eliminate, particle egress from an open receiver. This thesis presents a detailed characterisation …
Page 1 of 10