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 136 for “"energy recovery"”.
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Energy recovery from urine
… makes urea a potential source of green energy. This thesis demonstrates a novel approach for the energy recovery from urea present in urine at the production source, using decentralised wastewater treatment systems. A new process has been developed in this thesis based on the integration …
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Energy Recovery from Oil Sands Reservoirs
… of centipoise. To extract bitumen via in-situ recovery processes, the bitumen's viscosity must be lowered to less than 20 cP. In all current commercial oil sands recovery processes, this is done by injected high pressure and temperature saturated steam into the reservoir. One such process, …
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Hydraulically-actuated microscale traveling energy recovery
… power grows, alternatives to chemical stored energy may enable users with additional system capabilities. This thesis presents a miniature hydroelectric turbine system for use in wearable energy harvesting applications. A radial outflow turbine, which trades performance for manufacturability, …
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A system for efficient neural stimulation with energy recovery
An analog VLSI-based low-power neural tissue stimulator is presented as a part of the MIT and Massachusetts Eye and Ear Infirmary Retinal Implant Project to develop a prosthesis for restoring some useful vision to patients blinded by retinal degeneration. Such a prosthesis would receive image data …
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Enhancing energy recovery from industrial wastewater using microbial fuel cells
… electricity production. However, the electricity recovery needs improvement if MFCs are to compete with already established technologies e.g. anaerobic digestion. The aim of this study was to investigate ways of enhancing electricity recovery from (synthetic) industrial wastewater. Initial studies …
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Impact of advanced energy recovery system on light commercial building
… required by the building codes. This raises the energy costs of the buildings, especially when the number of occupants are large. In order to reduce the energy costs, traditionally, energy is recovered from the outgoing exhaust air to the incoming fresh air by use of various energy recovery …
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Increasing the efficiency of cam follower systems through energy recovery
… low speed applications. Results also show that energy can be recovered from the system during the fall portion when the follower subjects the cam to a high return force. An analytical analysis describes the characteristics of how this return force can be recovered to increase overall system …
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Hydrothermal liquefaction for energy recovery from high-moisture waste biomass
… for converting high-moisture waste biomass into energy dense “biocrude” oil that can be used for direct combustion or refined for transportation grade fuels. This study investigates the influence of biomass composition on the chemical characteristics of hydrothermal liquefaction biocrude oil, and …
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A highly integrated adiabatic energy recovery digital to analog computer
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Shape change for global vorticity shedding and added mass energy recovery
… of global vorticity shedding, as well as the recovery of momentum from the wake back to the body in the case of added mass energy recovery. Global vorticity shedding occurs when an object rapidly vanishes from the fluid. A rapid retraction is an approximation of a disappearing object, and as a …
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Making Decentralized Desalination More Affordable Using Improved Process Design, Control, and Energy Recovery
… and existing batch ED systems. Decreasing the energy requirements of community-scale RO, by recovering hydraulic power from the brine stream, will make off-grid deployments more affordable. However, existing energy recovery devices (ERDs) are prohibitively expensive. We investigated the …
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Numerical simulation and optimization of cyclic and continuous fluid injection for geothermal energy recovery
Geothermal energy is a viable solution for reducing greenhouse gas emissions and mitigating climate change. It has a wide geographic distribution, requires little exploration and operation costs, and has virtually no carbon emissions. This renewable energy source can generate electricity, provide …
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Experimental studies of multipass beam breakup and energy recovery using the CEBAF injector linac
… 200 $\mu$A average current from an injection energy of 5.6 MeV to a final energy of 80.1 MeV indicates that BBU should not be a problem in the full CEBAF accelerator. In addition, we were able recover all the energy from a 30 $\mu$A 42.8 MeV first pass beam by recirculating it out of phase and …
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Experimental studies of multipass beam breakup and energy recovery using the CEBAF injector LINAC
… than 200 pA average current from an injection energy of 5.6 MeV to a final energy of 80.1 MeV indicates that BBU should not be a problem in the full CEBAF accelerator. In addition, we were able recover all the energy from a 30 pA 42.8 MeV first pass beam by recirculating it out of phase and …
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Optimizing high-rate activated sludge: organic substrate for biological nitrogen removal and energy recovery
… (HRAS) process destroys some of the chemical energy present in municipal wastewater, this process has been gaining attention as a viable technology for achieving energy neutrality at water resource recovery facilities. In addition to carbon capture for energy recovery, A-stages are also being …
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Osmotic mass exchangers for power generation and energy recovery : analysis and analogy to heat exchangers
… exhibits promise for making desalination more energy efficient and is receiving attention in the literature. PRO exchangers are capable of producing power from two streams of different salinity and recovering energy from the brine stream of any desalination process when paired with water pumps …
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Energy recovery at thermodynamic expansion and thermal boosting through convection in flat plate solar thermal systems.
Fossil fuels have served mankind to meet energy needs in both domestic and commercial applications for a considerable length of time. However, fossil fuels have environmental implications such as emission of harmful gases, depletion of ozone layer and climate change. Moreover, the ever rising …
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Advanced anaerobic treatment for energy recovery and improved process economics in the management of biorefinery wastewaters
As efforts increase to shift energy sources away from fossil fuels, bioenergy has been identified as one potential mechanism to reduce the environmental impacts of liquid fuels. But to be able to realize the environmental benefits offered by bioenergy development requires cost competitiveness of …
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Valorisation of biomass-derived wastewaters via aqueous phase reforming for energy recovery: a multi-level performance assessment
L'abstract è presente nell'allegato / the abstract is in the attachment
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