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 96 for “"Second law"”.
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Second law analysis and optimization of humidification-dehumidification desalination cycles
… that cannot be substantially improved and a second component that should be the target of efforts to minimize entropy generation. Finally, the failure of exergy analysis to yield conclusive results for on-design HD cycle analysis is discussed briefly. Following the Second Law analysis, an …
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The life of quanta : entanglement wormholes and the second law
… bridges require monogamous EPR correlations. The second is a generalization of the second law of thermodynamics. We prove a generalization of the classic Groenewold-Lindblad entropy inequality, combining decoherence and the quantum Bayes theorem into a simple unified picture where decoherence …
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Second law analysis of a natural gas-fired steam boiler and cogeneration plant
A second law thermodynamic analysis of a natural gas-fired steam boiler and cogeneration plant at Rice University was conducted. The analysis included many components of the plant including piping, valves, boilers, turbines, piping specialties and various other pieces of equipment. Typical steady …
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Rheological properties, stochastic characteristics, and second law violations of atomic fluids in Couette flow
… behavior, the system’s tendency to violate the second law of thermodynamics, and the latter’s consequences for continuum theories. Using non-equilibrium molecular dynamics (NEMD) simulations, we study the shear-stress under steady-state conditions and its dependency on fluid properties …
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Second law analysis of a waste heat recovery combined power cycle using transcritical carbon dioxide
Common power cycles discard a large portion of useful energy into the environment via exhaust gasses. Through the use of cascade bottoming cycles, this wasted exergy may be utilized for power generation and hot water production. Heat transfer between cycles occurs through a heat exchanger. To …
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Second law analysis of a liquid cooled battery thermal management system for hybrid and electric vehicles
As hybrid and electric vehicles continue to evolve there is a need for better battery thermal management systems (BTMS), which maintain uniformity of operating temperature of the batteries in the vehicles. This thesis investigates the use of an indirect liquid cooled system, which can be applied to …
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Second law analysis of the transient behavior of solid media thermal storage utilizing finite difference computational modeling
… in each slice would be fully mixed. First and Second Law analysis were incorporated as a means of evaluating different configurations of the storage system design.
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Second law analysis and the application of the efficient power criterion to a four-temperature-level absorption chiller
… to derive a finite heat capacity model. Then, a second law analysis along with a thermo-ecological criterion is applied to determine the best compromise between efficiency and cooling load. Systems input parameter variations are an important tool, while determining the efficiency-cooling capacity …
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Second law analysis revisited: a critical look at its past development, a clarification of its terminology, and a demonstration of its use as a design tool through microcomputer programming
The second law is still rarely used as a design decision tool. However, information obtained from second law analysis is valuable in the design process for thermodynamic systems. This investigation reviews the past development of second law analysis. A clear, operational vocabulary is established. …
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Evaluation of methods to account for release from nanofiber scaffolds
… researchers utilize models based on Fick's second law of diffusion to predict release in cylindrical coordinates. This work aims to understand the release from electrospun fibers by finding the relationship between Fick's second law of diffusion and the mathematical models from experimental …
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Irreversibilities and nonidealities in desalination systems
… solutions of different or unknown composition. Second Law efficiency for chemical separation processes is defined using the minimum least work and characterizes energetic efficiency. A methodology is shown for evaluating Second Law efficiency based on primary energy inputs. Additionally, entropy …
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A multiple objective approach to evaluate economic and environmental impacts of agricultural management systems from a sustainable development perspective
… quantity limit of resources generally employ the second law of thermodynamics, but a close examination indicates that this application of the second law is incorrect. The inapplicability of the second law thus widens the range of alternative choices that can be included in the design of a …
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Monovalent selective electrodialysis : optimizing energetics for desalination and mineral recovery
… selectivity, specific energy consumption, and second law efficiencies for different system conditions. An optimization study was also carried out to determine the optimal operating parameters for the MSED system. The optimized system led to a decrease in specific energy consumption and an …
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Primordial imperatives and the evolution of control of endolysosomal trafficking
… protects life from the harsh realities of the second law of thermodynamics. The primordial imperatives of the first and second law of thermodynamics underlie the evolution of the processes regulating membrane traffic. In order to meet the needs of maintenance of membrane integrity and osmotic …
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Physics-Based Li-Svo Cathode Model
… The model is based on a single particle Fick's second law approach with the open-circuit potential modeled with a Redlich-Kister equation. By assuming that lithium ions intercalate only through the ends of the cuboid SVO particles, the model is able to predict accurately the discharge profile of …
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Nickel-based superalloy operating temperature determination via analysis of gamma/gamma' microstructure and coating/base material interdiffusion
… with an error function solution to Fick's Second Law. This method provided an estimation of the operating temperature that varied from the reported operating temperature by only 1%.
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Experimental study of reversible AC/HP system for electric vehicles
… electric heaters usually have almost 100% first law efficiency, their second law efficiency is typically very low. For a common electric car, turning on the PTC heater can drain the battery and decrease the drive range dramatically. A heat pump is an alternative way to provide equivalent amount …
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Membrane distillation for high salinity desalination
… Energy efficiency (gained output ratio or GOR), second law efficiency, and the specific membrane area were used to quantify the performance of the system. At high salinities, the increased boiling point elevation of the feed stream resulted in lower fluxes, larger heating requirements and lower …
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Investigations Into the Physical Mechanisms That Facilitate Transformation Hysteresis in Shape Memory Alloys
… a phenomenological point view and satisfy the second law of thermodynamics by considering a dissipative potential. In the current study, an earlier thermo-mechanical formulation is advanced beyond phenomenological considerations to include the effects of micro-scale plasticity. With this, the …
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Entropy in Two American Road Narratives
… Running Down" the theme of entropy, the second law of thermodynamics, is explored and revealed to be a common motif within many works of American literature. Tanner's analysis does not specifically address the presence of entropy within the genre of the American road narrative; when …
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