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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 29 for “"Regenerator"”.
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Analysis of a magnetically active regenerator
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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All-optical 2r regenerator based on self-phase modulation
… the achievable transmission distance. Optical 2R regenerators provide an effective way of coping with transmission impairments by restoring the quality of optical signals through re-amplification and reshaping (2Rs), thereby enabling reliable transmission over long distances. In this work, …
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Analysis of a Flat-Plate, Liquid-Desiccant, Dehumidifier and Regenerator
… flat-plate liquid-desiccant dehumidifiers and regenerators was developed and implemented. The two-dimensional model takes into account the desiccant, water and air flow streams. A parametric analysis was performed to evaluate the influence of some of the most important operational parameters on …
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Prediction of regenerator thermal performance using a non-iterative method of computation
… 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 model.<br/><br/>The numerical techniques required to compute the …
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Modeling and optimization of a two-stage regenerator fluid catalytic cracking unit
… coke. Catalyst activity is restored in the regenerator by burning off the coke with air. Steam formation during high temperature single-stage regeneration can cause permanent catalyst deactivation. Two stage regeneration allows steam formation to occur in the lower temperature first stage …
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Design optimization of high-performance regenerator for caloric cycles using numerical and experimental methods
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Investigations in novel regenerator concepts for use in a small motor-vehicle gas-turbine engine
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Selective removal of NOx from catalytic cracking regenerator effluent using wet scrubbing with aqueous sodium chlorite solutions
In most refineries, the flue gas from the regenerator in the fluid catalytic cracking (FCC) unit represents a key source of NOx, SOx, particulate, and CO emissions. Wet scrubbing systems have been used with great success to control particulate and SOx emissions from typical FCC regenerator flue …
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The design of low-leakage modular regenerators for gas-turbine engines
The design of a modular regenerator concept (patented by Wilson and MIT) for gas-turbine engines is investigated. Mechanical design analysis and theoretical performance calculations were made to show the concept's functionality and performance benefits over current regenerator designs. The modular …
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A CFD analysis of the pressure drop through misaligned Stirling engine regenerators
… discover the average misalignment in wire mesh regenerators, and it was found that regardless of the intended stacking arrangement, the average misalignment was 44% to 49%. A 3-dimensional CFD model was validated against previous empirical results, and used to determine the effect of wire mesh …
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Kinetic modelling simulation and optimal operation of fluid catalytic cracking of crude oil: Hydrodynamic investigation of riser gas phase compressibility factor, kinetic parameter estimation strategy and optimal yields of propylene, diesel and gasoline in fluid catalytic cracking unit
… reactors in the FCC unit: the riser and the regenerator. The production objective of the riser is the maximisation of gasoline and diesel, but it can also be used to maximise products like propylene, butylene etc. For the regenerator, it is for regeneration of spent or deactivated catalyst. …
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Exergy analysis of a Stirling cycle
… of heater and cooler tubes, and four different regenerator mesh types. The engine geometry was optimised for maximum work output using the implicit filtering algorithm, and the results show the dominant effect that the regenerator has on engine performance and the geometry that gives maximum …
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The Recovery of Valuable Vapour Phase Solvents using Activated Charcoal Cloth
… an air solvent mixing region, the adsorber, regenerator and solvent recovery unit. A continuous length of cloth was transported over a series of rollers through a 1m length of duct counter currently to the flow of solvent vapour-air mixture. The cloth was then passed through the regenerator …
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Control of a Nonlinear Mach-Zehnder Interferometer for Regeneration Using Digital Signal Processing
… to both amplitude and phase noises. Optical regenerators based on nonlinear Mach Zehnder interferometers (NMZIs) are able to suppress them both. To use a NMZI as a regenerator, the frequency of the pump signal must be kept close to that of the data carrier and the phase difference between the …
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Mechanistic Investigation of FCC CO/NOx Emission Control Additives
… during the cracking process - into the FCC regenerator unit and is eventually released from this unit in the form of NOx and NH3. Among the different technologies currently employed to control these pollutants, the use of catalytic additives is the most attractive one, as it is simple, …
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Hydrothermal aging of zeolite-based catalysts
… was treated hydrothermally under simulated FCC regenerator conditions in a laboratory scale fluidized bed. Fresh and steam-aged catalysts were characterized by surface area reduction using the nitrogen BET and t-Plot surface area methods. The surface morphology was apparent from the scanning …
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The Retrofit and Regeneration of local vernacular
… dissertation investigates architecture’s role as regenerator within the management of vulnerable heritage sites in sensitive urban heritage environments. Regenerative design is used to interpret place and serve as the mediator between urban conservation and sustainable strategies, in order to …
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Optimal Control of Stirling Engines
… numerischen Aufwandes aus der Beschreibung des Regenerators, einem gasdurchströmten Kurzzeit-Wärmespeicher. Im ersten Teil der Arbeit wird der Fokus deshalb auf die Entwicklung eines effizienten Regeneratormodells gelegt. Hierbei wird ein neuartiger Ansatz gewählt, der sich aus der Perspektive …
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Analysis and optimisation of the performance of nonlinear optical communication systems
… makes a better fit in the central part of the regenerator nonlinear transfer function produces more accurate approximation of the BER and BER penalty. We present a statistical analysis of RZ-DPSK optical signal at direct detection receiver with Mach-Zehnder interferometer demodulation
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