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 207 for “"temperature control"”.
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Building Temperature Control with Intelligent Methods
<p>Temperature control is important for both human comfort and the need in industry. In the thesis, two good intelligent control methods are compared to find their advantages and disadvantages. Matlab is used as the tool to make models and process calculations. The building model is one simple room …
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Temperature control strategies for radiant floor heating systems
… a radiant floor heating (RFH) system useful for control analysis is developed. The overall model consists of a boiler, an embedded tube floor slab and building enclosure. The overall model was described by nonlinear differential equations, which were solved using finite numerical methods. The …
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Millikelvin temperature control system for the ExoplanetSat Imager
… In order to limit the noise induced by variable temperature, the temperature of the imaging device needs to be controlled within a steady level over the approximately 30 minutes of orbit night when the telescope is actively observing. In this thesis I present the design of a cold-biased system …
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Feedforward temperature control using a heat flux microsensor
… to provide the input for a feedforward temperature control loop is investigated. The feedforward loop is added to proportional and integral feedback control to increase the speed of the response to a disturbance. Comparison is made between the feedback and the feedback plus feedforward …
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Managing Processor Adaptation for Energy Reduction and Temperature Control
The second part of the thesis discusses how to further improve the algorithm for energy efficiency. We observe that applications change their demands on the hardware as they execute. This suggests that certain hardware adaptations can be made to save energy at little performance cost. In the …
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A Novel Temperature Control Method for Electrode Type Ohmic Water Heaters
<p>The purpose of this work is to develop a temperature rise model for an Ohmic type electrode water heater, that regulates temperature by adjusting the electrode separation. The type and amount of dissolved solids and temperature, determine the electrical conductivity of the water, which limits …
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Learning based algorithms for temperature control and fouling prediction in heat-exchangers
… class of problems pertaining to heat-exchangers: temperature control and fouling resistance modeling and prediction. Designing robust and accurate temperature controllers for heat exchangers is very challenging primarily because of complexities associated with the synthesis of dynamics of …
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Improved nanotopography sensing via temperature control of a heated atomic force microscope cantilever
… sensitivity improvement arises from closed-loop control of cantilever temperature during the topography sensing. The cantilever temperature is controlled by maintaining constant electrical resistance, current, power, or voltage across either the entire electrical circuit or individual components …
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Mu-synthesis controller design for temperature control of a solar steam gasifier with uncertainty modeling and robust analysis
… The gasifier is set to operate at a specific temperature to keep the total amount of syngas produced at a precise value. Since solar irradiation fluctuations would cause temperature fluctuations, temperature regulation via controlling the amount of lignite and oxygen fed into the reactor core …
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Design and fabrication of an intelligent solar-photovoltaic hybrid tunnel dryer for tomatoes with automatic temperature control and air recirculation.
… hybrid tunnel dryer for tomatoes with automatic temperature control and air recirculation. The entire dryer assembly consists of the main dryer itself, a solar photovoltaic system, and a control unit. The dryer was tested through the performance of seven experiments; three experiments where done …
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Design and fabrication of an intelligent solar-photovoltaic hybrid tunnel dryer for tomatoes with automatic temperature control and air recirculation.
… hybrid tunnel dryer for tomatoes with automatic temperature control and air recirculation. The entire dryer assembly consists of the main dryer itself, a solar photovoltaic system, and a control unit. The dryer was tested through the performance of seven experiments; three experiments where done …
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A feasibility study for reset control of an industrial batch reactor
A feasibility study for the application of reset control to the temperature control loop of a pressurized exothermic batch leach reactor in the hydrometallurgical Precious Group Metals (PGM) industry is carried out. Keywords: Reset control; Clegg integrator; initial states; industrial batch …
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Desiccant dehumidification analysis
… saves energy by separating humidity control from temperature control and also improves the indoor air quality as a good filter. This research explores the potential of applying desiccant dehumidification systems in buildings with less energy consumption. As the first step, the …
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Monitoring and control of metal-based additive manufacturing technologies
This work shows the development of monitoring and control strategies for additive manufacturing (AM) processes. An arc-length control system and a PID temperature control system were developed for Wire-arc AM processes. An Oxygen monitoring/control system with a shielding gas crossflow was …
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Design of thermal control systems for testing of electronics
… these functional tests may be performed at room temperature, at cold temperature, or at high temperature (-50C to 1600C) depending on the type of component and intended market. The thermal management of these components during testing forms two basic issues that need to be addressed. The first …
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Thermoelectric Cooler Based Temperature Controlled Environment Chamber Design for Application in Optical Systems
Temperature control is widely sought after in regards to optical systems as their optical parameters often show dependence on temperature. Examples include diode lasers, multiplexing systems, optical amplifiers, and filters all of whom have a high sensitivity to temperature. This thesis presents a …
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Temperature measurement and thermal control of die casting processes using CCD cameras
A non-contact temperature measurement system for the die casting process is developed, using low-cost, charge-coupled device (CCD) cameras. Factors present in an industrial setting that affect non-contact temperature measurement are identified, and a system is developed to overcome these factors. A …
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Small scale vacuum chamber for general use
… Often these samples are in need of precise temperature control. An ultra-high vacuum remains the best environment to provide precise and efficient temperature (not accounting for the energy needed to evacuate the chamber). Once completed the vacuum chamber basically consists of a base plate …
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