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 80 for “"Solar Irradiance"”.
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Implementation of Solar Irradiance Forecasting Using Markov Switching Model and Energy Management System
… however leads to increased operational cost. Solar irradiance forecasting helps to reduce reserve requirement, thereby improving the utilization of PV energy. In this thesis, a new solar irradiance forecasting method for remote microgrids based on the Markov Switching Model (MSM) is presented. …
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Variability of aerosol and cloud optical properties and their effect on the transfer of solar irradiance in the atmosphere
… the effects that these parameters have on the solar radiation transfer in the atmosphere. The first chapter provides a brief description of the basic concepts of radiative transfer. The radiative transfer theory is described, along with various approximations, used to address specific …
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New and Improved Methods to Characterize, Classify, and Estimate Daily Sky Conditions for Solar Energy Applications
… (POP-KD) that can be derived from ground-based irradiance measurement data. Quality of daily solar irradiance is characterized by a newly proposed parameter, POP-KD. This characterized daily quality is varying and uncertain at the middle level of the quantity, but high and more certain at very …
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Study of basin scale acoustic transmissions
… of the ocean was due only to changes in surface solar irradiance. The value of the surface solar irradiance anomalies necessary to cause the tomography results for warming (Spiesberger and Metzger, 1991) was computed. This value was larger than the actual value of surface solar irradiance anomaly …
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PV-powered membrane system control for continuous autonomous water solution in remote areas
This research addressed the challenge of Solar Irradiance (SI) fluctuations, which adversely affect the performance of photovoltaic-membrane (PV-membrane) systems used for water purification. These fluctuations lead to reduced permeate volume and quality, as well as increased specific energy …
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Solar activity variations of the ionospheres of Venus and Mars
… the atmosphere of a planet called an ionosphere. Solar activity, including solar flares, coronal mass ejections, and changes in the ionizing irradiance affect planetary ionospheres on short and long timescales. These effects are significant because the ionosphere is a reservoir from which …
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Global heat balance without and with solar radiation management
… Additional influences are variability of solar irradiance and the initial global average temperature at the end of pre-industrial period. Industrial activities perturbs the concentration of CO2, CH4, N2O, tropospheric ozone, other greenhouse gases, and contrails in the atmosphere. Also, …
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An Investigation Of Climate Patterns On Earth-Like Planets Using The NASA GISS Global Climate Model II
… trends, planetary orbital parameters, and solar irradiance variations. It is found that the EdGCM interface to the GCM-II 3-D climate model is capable of studying climate patterns on hypothetical Earth-like planets, with some limitations involved. Studying extreme climate patterns on …
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Assessing Broadband and Spectral Irradiance Variability for Solar Nowcasting Using Statistical Analysis and Machine Learning
Solar photovoltaic (PV) resources are a key enabling technology in the global energy transition towards a more sustainable future. However, PV generation is highly variable due to the dynamic shading caused by clouds. To mitigate the effects of PV variability on electrical grid stability, grid …
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Modeling Ambient Temperature Affected Photovoltaic Inverter IGBT Lifetimes With Rainflow Analysis
… PV inverters. Specifically, ambient temperature, solar irradiance, and load demand for a duration of a year were considered in modeling for a chosen integrated gate bipolar transistor (IGBT) from International Rectifier. Two cases were considered in the modeling, yielding lifetimes of 29.1 years …
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Development of a hybrid solar photovoltaic and heat pump system for domestic heating and electricity generation
… indirect expansion method. It combines multiple solar photovoltaic thermal panels that convert solar energy to heat and electricity with a water-to-water heat pump. This allows for the generation of heat and electricity on the domestic level from sunlight. The technical feasibility of the system …
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Distribution Network Operation with High Penetration of Renewable Energy Sources
… behaviour of renewable sources (such as solar irradiance and wind speed) and the load demands are modelled through Scenario-Tree technique. The distributed network frame is recast using mixed-integer linear programming (MILP) that is solved by using the GAMS software and then the obtained …
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Stand-alone solar-pv hydrogen energy systems incorporating reverse osmosis
… good availability of renewable energy sources (solar or wind). One solution is to utilise small-scale renewably powered stand-alone energy systems to help supply power for everyday utilities and to operate desalination systems serving potable water (drinking) needs reducing diesel generator …
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Photosynthetic and oxidative stress in the green alga Dunaliella tertiolecta: The effects of UV-B and UV-A radiation
… A UV-B spectral profile comparable to natural solar irradiance was produced in the laboratory by filtering UV-B lamp emissions with a novel liquid urate solution (UA) and compared against the conventionally used cellulose acetate (CA) filter. Cells growing at 100, 200 or 600 mumol photons m …
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Plant Successional Patterns at Sperry Glacier Foreland, Glacier National Park, MT, USA
… fragmentation, concavity, flow accumulation, and solar irradiance). Sixty-one plots (each 8 square meters) were placed throughout the glacier foreland using a random sample stratified by terrain date. Percent cover, species richness, Shannon's diversity, and species evenness were calculated for …
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High Efficiency Solar Desalination and Superheated Steam Generation Utilizing Contactless Infrared Heating
… a novel configuration of a Contactless Solar Evaporation Structure (CSES), which has been prototyped over 41 experiments and 4 design iterations. The final design is able to utilize ~20% of solar energy (under 1 sun) to radiatively boil water for purposes of desalination (i.e. clean …
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Experimental investigation of building envelope and air source heat pumps in Canadian cold climate
… investigates how extreme temperatures, wind, and solar conditions affect building envelope performance and the efficiency of commercial ASHPs. Experiments were conducted in controlled conditions using the full-scale climatic chamber and wind tunnel at Ontario Tech University. Results were analyzed …
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Forecasting and Modelling Space Weather with Deep Learning Methods
… systems that use extreme ultra-violet (EUV) solar images and deep learning techniques to forecast and model space weather conditions. Firstly, vision transformers are used to forecast solar wind speed from solar EUV images, with improvements over previous work. Secondly, solar irradiance is …
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