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 17 of 17 for “"Hydro energy"”.
-
Improved modelling of pumped hydro energy storage
… fossil fuel reserves and concerns over energy security have led to renewable energy targets that have spurred the growth of variable renewable generation sources such as wind and wave in many countries. The introduction of variable sources of electrical generation makes the operation and …
-
Short-Term Off-River Pumped Hydro Energy Storage (STORES)
Short-Term Off-River Energy Storage (STORES) is a breed of pumped hydro energy storage which incorporates closed-loop pumped hydro systems located away from rivers. Compared with conventional river-based hydroelectric projects, the STORES facilities consume modest volume of water and have little …
-
Short-Term Off-River Pumped Hydro Energy Storage (STORES)
Short-Term Off-River Energy Storage (STORES) is a breed of pumped hydro energy storage which incorporates closed-loop pumped hydro systems located away from rivers. Compared with conventional river-based hydroelectric projects, the STORES facilities consume modest volume of water and have little …
-
System design and manufacturability of concrete spheres for undersea pumped hydro energy or hydrocarbon storage
Offshore wind and energy storage have both gained considerable attention in recent years as more wind turbine capacity is installed, less attractive/economical space remains for onshore wind, and load-leveling issues make integrating wind power into the existing electrical grid difficult. For …
-
Seasonal and diurnal variability of wind and hydro energy sources on the Azores, Portugal and the effectiveness of utilizing energy storage to achieve maximum penetration
Thesis (S.M. in Technology and Policy)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2011.
-
Design and implementation of a 6 kW wind powered water heater controller with PI control
In our quest to use more renewable energy to reduce our dependence on non-renewable fuels man has been harnessing wind, solar and hydro energy for many years. While hydo and solar energy are well established, it is only during the last decade that serious progress in wind energy has been made. …
-
Innovative energy systems and processes based on hydrogen from RES and its derivatives in the energy transition process
This thesis investigates the integration of green hydrogen and ammonia production in renewable energy-powered energy systems, as a decarbonization pathway in the energy sector. Climate change mitigation and the transition to carbon-free energy systems are challenged by the inherent intermittency of …
-
Sodium-Ion Battery Cathode Active Material Cost Drivers and Manufacturing Scale-up Barriers
Energy storage can mitigate challenges posed by intermittent renewable generation. Non-hydro energy storage is currently dominated by lithium-ion batteries, but cost and materials supply are concerns. Sodium is more abundant and cheaper to mine and refine than lithium, positioning sodium-ion …
-
The potential for alternative technology to supply the energy needs of the rural population of South Africa
… aimed at evaluating the potential of alternative energy devices to satisfy the energy requirements of the underdeveloped rural regions of South Africa. A literature survey of the energy requirements of the inhabitants of such regions is first undertaken. Thereafter energy conversion devices using …
-
A pathway to decarbonised energy
The energy sector accounts for three quarters of global emissions and needs to be the primary focus of decarbonisation. This thesis examines an affordable pathway to decarbonised energy, enabled by 100% renewable electricity and the deep electrification of transport, heat and industry. The proposed …
-
A pathway to decarbonised energy
The energy sector accounts for three quarters of global emissions and needs to be the primary focus of decarbonisation. This thesis examines an affordable pathway to decarbonised energy, enabled by 100% renewable electricity and the deep electrification of transport, heat and industry. The proposed …
-
Hydrological aspects of brown trout management in the Selwyn River system, Canterbury, New Zealand
The study examines the implications of the hydrological characteristics of the Selwyn River system, Canterbury, New Zealand, on management of the brown trout (Salmo trutta) fishery. The project has four main aims: to describe the hydrological characteristics of the Selwyn River system; to outline …
-
Constraints on the wide dissemination of photovoltaic solar home systems in the rural areas of South Africa
Renewable energy is becoming a key policy issue in the energy sector in most countries in the world. Considering various energy options, renewable energies are seen to be ecologically sustainable and they contribute towards conservation of fossil fuels as well as the environment. The use of …
-
A comparative analysis and optimisation of thermo-mechanical energy storage technologies
Electrical Energy Storage (EES) can decouple energy production from its consumption and is urgently needed by both conventional energy system for load leveling and renewable energy system for intermittency smoothing. Currently, Pumped Hydro Energy Storage (PHES) and Compressed Air Energy Storage …
-
Economic valuation of energy storage coupled with photovoltaics : current technologies and future projections
… framework for the economic valuation of current energy storage systems coupled with photovoltaic (PV) systems is presented. The solar-with-storage system's operation is optimized for two different rate schedules: (1) Time-of-use (TOU) for residential systems, and (2) Real-time wholesale rates for …
-
Adaptive Hydraulics for Improved Centrifugal Pump Efficiency
… including: clean and waste water systems, pumped hydro energy storage, closed loop HVAC heating, and irrigation. Globally, pumps consume hundreds of billions of kilowatt hours of electricity each year. In the US, centrifugal pumps consume an estimated 4.4% of electricity generated, equivalent to …
-
Application of optimal control for power systems considering renewable energy technologies
Dissertation submitted in fulfilment of the requirements for the degree of Master of Engineering in Electrical Power Engineering, Durban University of Technology, Durban, South Africa, 2021.