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Title
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The design, development, fabrication and testing of a 100 watt skutterudite thermoelectric generator
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Creator
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Lyle, Matthew
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Date
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2011
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Collection
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Electronic Theses & Dissertations
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Description
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Thermoelectric technology is a method of renewable, alternative energy that utilizes the Seebeck effect to convert some of the thermal energy in a temperature gradient to electricity. The optimal temperature range for skutterudite thermoelectric devices is around 650°C, making them ideal for high temperature applications. At this temperature range, the skutterudite thermoelectrics have a device-level conversion efficiency of about 9%. As these devices are still in the development stage,...
Show moreThermoelectric technology is a method of renewable, alternative energy that utilizes the Seebeck effect to convert some of the thermal energy in a temperature gradient to electricity. The optimal temperature range for skutterudite thermoelectric devices is around 650°C, making them ideal for high temperature applications. At this temperature range, the skutterudite thermoelectrics have a device-level conversion efficiency of about 9%. As these devices are still in the development stage, testing that simulates real-world conditions is necessary to assess the feasibility of implementing skutterudite thermoelectric technology with current processes. A standardized procedure to test the skutterudite thermoelectric devices has been established to reduce variability in device fabrication and generator assembly. This procedure includes a measurement and tracking system to aid in establishing relationships between component properties and thermoelectric performance. In addition, a technology has been developed to electrically bypass any failed devices to preserve overall power generation.Results indicate that additional efforts are needed to address the high level of thermal stresses the devices experience during operation. Several methods to reduce thermal stresses and investigate potential stressors are proposed. In addition, the successful performance of the electrical bypass technology suggests that it is indeed a viable method of bypassing individual devices for experimental tests. Additional testing and improvements can be made as necessary to implement this technology in the envisioned 1 kW skutterudite thermoelectric generator.
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Title
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Evaluation of porcine circovirus type 2 vaccination
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Creator
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Venegas Vargas, María Cristina
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Date
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2011
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Collection
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Electronic Theses & Dissertations
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Description
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"ABSTRACT'EVALUATION OF PORCINE CIRCOVIRUS TYPE 2 VACCINATIONByMaría Cristina Venegas VargasPorcine circovirus type 2 (PCV2) is one of the most important diseases in the swine industry worldwide, having a high economic impact in the sector since its description in the 1990s. The introduction of the first vaccine in 2006 was a major breakthrough for control of the disease, but there are still important questions to be addressed regarding the use and implementation of PCV2...
Show more"ABSTRACT'EVALUATION OF PORCINE CIRCOVIRUS TYPE 2 VACCINATIONByMaría Cristina Venegas VargasPorcine circovirus type 2 (PCV2) is one of the most important diseases in the swine industry worldwide, having a high economic impact in the sector since its description in the 1990s. The introduction of the first vaccine in 2006 was a major breakthrough for control of the disease, but there are still important questions to be addressed regarding the use and implementation of PCV2 vaccination. In order to answer some of these questions the following studies were performed to observe the effect of PCV2 vaccine on growth performance and carcass composition in herds of different health status and also to evaluate the use of sentinel pigs as a tool for PCV2 detection.
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