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 50 for “"Fluid Temperature"”.
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Intelligent Non-Invasive Thermal Energy Flow Rate Sensor for Laminar and Turbulent Pipe Flows
… rate is the thermal energy that is carried by a fluid, for example, in a pipe to heat or cool a space in a building. It can be measured by an energy flow rate sensor which consists of a volume flow rate meter and supply and return fluid temperature sensors to bill the users for their energy …
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Exploring two-phase hydrothermal circulation at a seafloor pressure of 25 MPa: Application for EPR 9°50′N
… energy, and salt conservation in a NaCl-H2O fluid to model the seafloor hydrothermal processes. These simulations use homogeneous box geometries at a fixed seafloor pressure of 25 MPa with constant bottom temperature boundary conditions that represent a sub-axial magma chamber to explore the …
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Trace element proxies and mineral indicators of hydrothermal fluid composition and seafloor massive sulfide deposit formation processes
… (SMS) deposits and related hydrothermal vent fluids to identify proxies of reaction zone conditions (host-rock lithology, hydrothermal fluid temperature and chemistry). Chapter 2 investigates the morphology, mineralogy, and geochemistry of SMS deposits from six vent fields along the Eastern …
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Trace element proxies and mineral indicators of hydrothermal fluid composition and seafloor massive sulfide deposit formation processes
… (SMS) deposits and related hydrothermal vent fluids to identify proxies of reaction zone conditions (host-rock lithology, hydrothermal fluid temperature and chemistry). Chapter 2 investigates the morphology, mineralogy, and geochemistry of SMS deposits from six vent fields along the Eastern …
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A Unified Model for Multi-Phase Flow and Heat Transfer in Wellbores
… multiphase flow to the production of petroleum fluids. A unified model was developed to predict the pressure profiles in wellbores using models available in the literature, which was then used to develop a simulator. A rigorous approach was also taken to model heat transfer and predict the …
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Prediction of regenerator thermal performance using a non-iterative method of computation
… of a non-iterative method for predicting the fluid temperature variations in a counterflow regenerator operating at cyclic equilibrium. The method utilises the closed-form solutions derived by earlier workers from the equations of the regenerator, finite-conductivity thermal …
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Estudo teórico-experimental de um concentrador solar cilíndrico-parabólico
… vessel has a capacity of 90 l, and the working fluid is water flowing at a rate of 200 l/h inside a l" steel piping. All the system was isolated with a glass wool. The prototype was submitted to various testing solar insolation condutions, wind speeds,ambient temperatures. For a fixing rate of …
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Non-invasive Method to Measure Energy Flow Rate in a Pipe
… use a variety of invasive sensors, including temperature sensors, turbine flow meters, and vortex shedding devices. These systems are costly to buy and install. A new approach that uses non-invasive sensors that are easy to install and less expensive has been developed. A thermal interrogation …
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The design of an apparatus to determine the film coefficient of water at high heat fluxes
… The variation of the film coefficient with water temperature, flow rate, heat input rate, and fluid pressure may be investigated with this apparatus. The range of variables is Heat flux: 2.5 x 10⁵ to 5 x 10⁵ B/hr ft² Inlet temperature: 100 to 300°F Mass velocity: 0.52 x 10⁶ to 1.7 x 10⁶ 1b/hr ft² …
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Local free convection to non-Newtonian fluids from a horizontal, isothermal cylinder
… heat between a body surface and the motionless fluid surrounding it is perhaps one of the most naturally occurring physical phenomena. Undoubtedly interest and speculation regarding this natural or free convection behavior dates back centuries. However, as Jakob (13) reveals, it was not until …
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Thermally Developing Electro-Osmotic Convection in Circular Microchannels
… a circular microtube under imposed constant wall temperature (CWT) and constant wall heat flux (CHF) boundary conditions. Established by a voltage potential gradient along the length of the microtube, the hydrodynamics of such a flow dictate either a slug flow velocity profile (under conditions of …
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Characterization of fluid flow in paper-based microfluidic devices
Paper-based microfluidic devices are being leveraged for application of diagnostic and detection technology in low-resource settings. In order to design a highly accurate device, a mathematical model is required to predict flow behaviour in the paper-based microfluidic devices. A series of …
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Characteristics of heat transfer fouling of thin stillage using model thin stillage and evaporator concentrates
… thin stillage were studied as a function of bulk fluid temperature and heat transfer surface temperature. Experiments were conducted by circulating thin stillage or carbohydrate mixtures in a loop through the test section which consisted of an annular fouling probe while maintaining a constant …
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Analytical and Experimental Study on Coaxial Borehole Heat Exchangers
… is made to produce accurate simulations for the fluid temperature measured at the outlet of a coaxial BHE over the course of a typical thermal response test (TRT). The model considers coaxial configurations where the inner and outer pipes may have differing thermal properties, diameters, and …
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The determination of pressure profiles in oil ring seals considering the influence of temperature gradients in the sealing fluid
… analysis includes the influence of the sealing fluid temperature gradients on the leakage flow rate and seal dynamic characteristics for multi-ring and/or multi-land ring configurations. Using classical short bearing theory but allowing for temperature and pressure dependent viscosity variations …
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Thermal sustainability of low-temperature geothermal energy systems: System interactions and environmental impacts.
… for environmental impacts such as undesirable temperature rises from these systems in temperature-sensitive regions. Furthermore, interference between adjoining installations is being reported, raising issues of sustainability in terms of performance and equitable sharing of natural resources. …
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Injection Induced Seismicity Modeling and Application to the Karapiti Reinjection Area, Wairakei, New Zealand
… for injection induced seismicity integrates fluid flow, heat transfer, mechanical deformation and seismic rupture sequences. The applicability of the hydro-mechanical and thermo-hydro-mechanical coupled earthquake sequence numerical models is examined with a variety of scenarios which vary …
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Modeling and Sensitivity Analysis for Trace Gas Sensors
… QEPAS sensors employ one-way coupling from the fluid to the structure that requires prior experimental measurements of the damping of the QTF due to its motion in the viscous fluid. We study an improved two-way coupled model that is based on a Helmholtz system of thermo- visco-acoustic equations …
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Computational analysis of viscoelastic fluid dynamics with applications to heat exchangers
… analysis of a pressure driven viscoelastic fluid in a double pipe heat exchanger set-up is investigated. Non-Newtonian viscoelastic fluids in heat exchanger arrangements are encountered in various industrial applications such as power generation, refrigeration and in the food processing …
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A Model for the PTX Properties of H2O-NaCl
In many geologic environments, fluids have compositions that are approximated by the H₂O-NaCl system. When minerals grow in the presence of such fluids, some of the solution is trapped in the growing mineral as fluid inclusions. The salinity, temperature of homogenization, and pressure of …
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