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 22 for “"Seawater temperature"”.
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An analysis of drivers of seawater temperature in Kuwait Bay, Arabian Gulf
… from the entire region of the Arabian Gulf. Seawater temperature has an important impact on the marine environment. The aim of this study is to evaluate the drivers of seawater temperature in Kuwait Bay over the last two decades. Moderate Resolution Imaging Spectroradiometer (MODIS) and …
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Simulation, optimisation and flexible scheduling of MSF desalination process under fouling. Optimal design and operation of MSF desalination process with brine heater and demister fouling, flexible design operation and scheduling under variable demand and seawater temperature using gPROMS.
Among many seawater desalination processes, the multistage flash (MSF) desalination process is a major source of fresh water around the world. The most costly design and operation problem in seawater desalination is due to scale formation and corrosion problems. Fouling factor is one of the many …
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Optimal scheduling, design, operation and control of reverse osmosis desalination. Prediction of RO membrane performance under different design and operating conditions, synthesis of RO networks using MINLP optimization framework involving fouling, boron removal, variable seawater temperature and variable fresh water demand.
… clear understanding of the interaction of feed temperature and salinity on the design and operation of RO based desalination systems, simultaneous optimization of design and operation of RO network is investigated based on two-stage RO superstructure via MINLP approach. Different cases with …
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MSF process modelling, simulation and optimisation : impact of non-condensable gases and fouling factor on design and operation. Optimal design and operation of MSF desalination process with non-condensable gases and calcium carbonate fouling, flexible design operation and scheduling under variable demand and seawater temperature using gPROMS.
… takes into consideration the effect of stage temperature on the calcium carbonate fouling resistance in the flashing chambers in the heat recovery section, heat rejection section, and brine heaters of MSF desalination plants. The effect of seasonal variation of seawater temperature and top …
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Neural network based hybrid modelling and MINLP based optimisation of MSF desalination process within gPROMS: Development of neural network based correlations for estimating temperature elevation due to salinity, hybrid modelling and MINLP based optimisation of design and operation parameters of MSF desalination process within gPROMS
… sector in the desalination industry. Top Brine Temperature (TBT) (boiling point temperature of the feed seawater in the first stage of the process) is one of the many important parameters that affect optimal design and operation of MSF processes. For a given pressure, TBT is a function of …
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Effects of calendar time, temperature and growing degree-day on Pacific Herring (Clupea pallasii) length-at-age
… by time (year, calendar time), sea surface temperature (°C), and growing degree-day (a metric combining sea surface temperature and calendar time, GDD, °C·day). Time (year) explains more of the interannual variability in herring LaA compared to sea surface temperature and the GDD metric. In …
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A 10 kilowatt-thermal input multiple effect distillation pilot for concentrated solar power and desalination of seawater plant
… Capture of unused thermal losses from low temperature sources, to heat the TVC inlet motive steam, reduces the required motive steam temperature. The results of a parametric study confirm the Brayton power cycle analysis that the use of MED-TVC thermal harvest configuration for integration …
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Modeling and design of a power boosted turbo-compression cooling system
… presented, including annual engine loading and seawater temperature profiles. Three TCCS integration options and five working fluids (R134a, R1234ze(E), R1234yf, R245fa, R515a) were evaluated over the range of case study conditions using a fixed heat exchanger effectiveness thermodynamic model. …
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Shallow water coral distribution and its response to climate change
… which is mainly caused by the exceptionally high seawater temperature(>29oC). However, it is still unclear about the environmental factors that determine habitable environments for shallow water corals, and how they respond to future climate change.</p> <p>In this study, we compiled coordinates of …
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Culture-independent analysis of the bacterial community shifts in a macroalgal disease
… that increase in frequency during summer, when seawater temperature rises and the algal’s chemical defenses are reduced. The role of bacteria in the disease has been implied by difference in the microbial community composition between healthy and bleached algae and by two bacterial strains that …
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From micro to macro: the benefits and pitfalls of environmental generalism on coral reefs in the Anthropocene
As warming ocean temperatures culminate in large-scale mortality events across tropical, temperate, and deep-water reefs, a shift in environmental norms across marine ecosystems is causing species to expand into otherwise marginal environments. This widespread ecosystem restructuring raises the …
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Rhodoliths as environmental archives in the tropics
… of correlation with the local, instrumental seawater temperature dataset over the last five decades, at both monthly and interannual resolutions. Mg/Ca variations also record larger scale climate pattern such as EI Nino - Southern Oscillation (ENSO) variations, and compare well with the …
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Rhodoliths as environmental archives in the tropics
… of correlation with the local, instrumental seawater temperature dataset over the last five decades, at both monthly and interannual resolutions. Mg/Ca variations also record larger scale climate pattern such as EI Nino - Southern Oscillation (ENSO) variations, and compare well with the …
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Optimized Sustainable Hydrogen Generation from Liquid Metal Activated Aluminum-Water Reactions
… in aqueous environments. The study investigates seawater as an ionic medium for eGaIn eutectic agglomeration and reuse. However, chlorine binding slows the reaction, which was countered using high-temperature operation and catalytic enhancement. Adding 0.02 M imidazole accelerated the reaction …
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Numerical Modeling of the Hydrothermal System at East Pacific Rise (EPR) 9 Degrees 50' N Including Anhydrite Precipitation
… at a surface pressure of 25 MPa, and nominal seawater temperature of 10 C. The sides of the box are assumed to be impermeable and insulated. A constant temperature distribution is maintained along the bottom of the box consisting of a 1000 m long central-heated region maintained at 450 C to …
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A study of the dissolution of atmospherically derived trace metals into North Atlantic seawater
… of a suite of trace metals from aerosols into seawater from wet and dry deposition, with a focus on important trace metals: manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu) and lead (Pb). To this end, aerosol and rainwater samples were collected from Tudor Hill (Bermuda) and …
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The Effects of Ocean Acidification on Multiple Life History Stages of the Pacific Oyster, Crassostrea gigas: Implications for Physiological Trade-offs
… For marine systems these include increased mean seawater temperature, changes in carbonate chemistry equilibria, and increased pollutant loading due to non-point run-off, among other effects. Human-induced environmental changes will not have the same magnitude of effect in all regions, but on …
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The modern and glacial thermoclines along the Bahama Banks
… is investigated using CTD data. Potential temperature- salinity relationships demonstrate that the deep waters and most of the thermocline waters in these channels originates in the Sargasso Sea. Cross channel sections of water properties suggest the following: (1) water from the shallow …
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The ecophysiology of the cold-water coral Lophelia pertusa (Scleractinia)
… with water masses of oceanic origin where seawater temperatures are 4-12 oC and salinity is 35-37. The L. pertusa habitat is dynamic, often showing tidal fluctuation in currents, nutrient input and temperature. The small-scale variation in oxygen levels within the reef structure has not …
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The interaction of acidification and warming on the South African abalone, Haliotis midae, and the potential for mitigation in aquaculture
… acidification and its resultant alteration in seawater carbonate chemistry. Most calcifying organisms display reduced calcification and growth in response to ocean acidification, with possible alterations to acid-base regulation, development, gonadal maturation and behaviour, as well as reduced …
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