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 42 for “"Solar irradiation"”.
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New methodologies and improved models in the estimation of solar irradiation
The wide development of solar energy, technical agriculture and climate monitoring happening in these years requires a better knowledge of incoming solar irradiation. Although solar irradiation can be measured with pyranometers with high accuracy if correctly maintained, there is a lack of these …
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Investigating the effect of solar modelling using different solar irradiation data sets/sources within South Africa
When designing a solar energy system, accurate solar data for the specific site in which one plans to install the system is required to accurately determine the sizing of the system components based on the available amount of energy. Both the source of the data and the method used for measuring the …
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The development of a pseudo-mechanistic model of solar irradiation-induced inactivation of viruses in wastewater and natural waters
… of chemical contaminants, they are exposed to solar irradiation which can enable the inactivation of viruses that are hazardous to human health. However, this sunlight disinfection is an unintentional byproduct of traditional WSP design, and consequently virus concentrations are not always …
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Role of temperature and Suwannee river natural organic matter on inactivation kinetics of rotavirus and bacteriophage MS2 by solar irradiation
Made available in DSpace on 2011-05-25T14:39:48Z (GMT). No. of bitstreams: 3 Romero_Ofelia.pdf: 6501565 bytes, checksum: fe0aa589df9e541a23580f2363d03961 (MD5) license.txt: 4062 bytes, checksum: 829b47b3a3520d37a121ee82aa85744f (MD5) Romero_Ofelia.doc: 1506304 bytes, checksum: …
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Directly enhancing the photocatalytic transformation of CO2 and water to renewable fuels.
… restrict GHG through CO2 recycling and convert solar energy to alternative fuels through solar H2 production. This thesis describes the development of photo reactors to reduce CO2 emissions and to provide a novel method of producing H2 as a fuel source. A number of photo reactors were developed …
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Mu-synthesis controller design for temperature control of a solar steam gasifier with uncertainty modeling and robust analysis
… work, a unique hybrid allothermal/autothermal solar steam gasification process was utilized to produce synthesis gas by inputting lignite, water, and solar irradiation. Oxygen is also fed into the reactor to burn off a portion of the lignite if the solar irradiation is not sufficient to fuel …
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Green Photochemistry: The synthesis of fine chemicals with sunlight
… Following optimisation, use of non-concentrated solar irradiation was demonstrated in Irish sunlight conditions at Dublin City University. Use of concentrated sunlight was investigated in collaboration with the German Aerospace Centre (DLR), Cologne. In all cases, solar irradiation gave yields …
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Passive solar space heating in housing with particular reference to the Scottish climate.
… technical and economic scope for partial passive solar space heating of housing in Scotland. Initially an appraisal of current need and policy within an historical framework, established that trends towards low-rise, medium density housing with reduced maintenance costs and condensation risk, …
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Experimental studies of interactions between Zostera marina and the associated benthic fauna
… of field experiments, the importance of incident solar irradiation in affecting the seasonal growth of Zostera; and (5) Determine the relationship, if any, between the abundance of major invertebrate species and the abundance of eelgrass as determined by mean turion length.
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Computer simulations to calculate energy flux and image size on a receiver for different reflector geometries using caustics
… countries that lie on the ‘‘Sun Belt’’, where solar irradiation is sufficient, are working towards harvesting and exploiting solar energy. Given the fact that solar radiation has low density, efficient exploitation schemes depend on concentrating solar radiation to generate electricity within …
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HIGHLY-CONCENTRATED SUNLIGHT SEPARATION FOR WIDE-SPECTRUM SOLAR ENERGY HARVESTING
… current technologies aiming to utilize broader solar spectrum ranges have either expensive fabrication processes or low solar concentration performances. This thesis introduces the dispersive optical system (DOS), designed with commercially available optical components, which separates incoming …
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Reliability evaluation of solar power in South Africa's power system
… utilisation of renewable energy sources such as solar photovoltaics (PV) in electric power systems is growing rapidly due to government incentives, and negative environmental impacts associated with conventional generators. Many consider solar PV as a promising alternative source of energy due to …
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Control and Aerodynamic Design of a Solar Road Vehicle with Articulated Surfaces
… damage such as climate change. However, solar road vehicles—though designed and fabricated by some—have not reached a sufficient level to be production-worthy. The low efficiency of solar cells and the high energy demands of the average land vehicle are irreconcilable for most …
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Evaluating energy consumption within Icelandic greenhouses : towards sustainable and efficient vegetable production
… to be energy intensive due to Iceland's limited solar irradiation and cold climate. This paper looks at options for increased efficiency in greenhouses to determine how local food production could increase without the increasing electricity demand. Additionally, various calculations were made to …
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Size Optimization of Utility-Scale Solar PV System Considering Reliability Evaluation
… a size optimization approach for utility-scale solar photovoltaic (PV) systems is proposed. The purpose of the method is to determine the optimal solar energy generation capacity and optimal location by the minimizing total system cost subject to the constraint that the system reliability …
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Polyethylene-Based Multifunctional Composite Material for Radiation Shielding, Passive Thermoregulation, and In-Situ Fabrication for Space Exploration
… shielding from Galactic Cosmic Rays (GCRs) and Solar Particle Events (SPEs), it does not adequately mitigate secondary particles. The proposed composite material, comprising polyethylene and boron-rich fillers, aims to match polyethylene's GCR and SPE performance while enhancing thermal neutron …
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Development of 2d metallic nanomaterials for nanofluids with application in concentrating solar power
… which produces electricity under ceaseless solar irradiation and therefore suffers of daily intermittency. The integration of concentrated solar power plants in hybrid power blocks has been proposed as a solution for this intermittency by taking advantage of thermal energy storage to …
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Photochemically produced reactive species generation by extracellular organic matter sensitizers from Chlamydomonas reinhardtii
… cultures of Chlamydomonas reinhardtii under solar irradiation. Results show increasing steady-state levels of 3DOM, 1O2, and formation rates of •OH under sunlight irradiation as EOM levels increase with batch culture growth. Changes in reactive species levels were compared with changes in …
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Behavior of advanced innovative materials for improved long-term bridge performance
… behavior was correlated with climate condition (solar irradiation, ambient temperature, and wind speed) at the bridge site. In addition, current AASHTO specification and design guidelines do not address thermal considerations for the girders above deck (L-beams and inverted T-beams). In order to …
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Energy harvesting using ocean data acquisition system (ODAS) buoy for coral reef monitoring
… of sensors and devices. The potential energy of solar and wind to generate electricity for use to extend the life of the buoy used for the duration of the monitoring possible for a day, a week, or a year without having to come to change the existing energy supply on the buoy. Hence the solar wind …
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