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 19 of 19 for “"heat rate"”.
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Impact on heat rate and subsequent emissions due to varying operation of coal fired power plants
… model, which more or less implies a constant heat rate, when trying to show the emissions reduction benefits of integrating renewable power generation system on the grid. This approach does not consider the fact that there is a deterioration in the heat rate with load for the Coal Fired Power …
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Modeling Phase Change Heat Transfer of Liquid/vapor Systems in Free/porous Media
… solvent extraction incorporating electromagnetic heating is a relatively new concept that relies on Radio Frequency heating and solvents to replace steam in current thermal processes for the purpose of extracting bitumen from oil rich sands. The work presented here will further the understanding …
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Model identification with application to building control and fault detection
… model coefficients are valid for predicting heat rate given zone temperature as well as for predicting zone temperature given heat rate. Control. Three important control applications involving transient zone thermal response are HVAC curtailment, optimal start, and night precooling. A general …
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The Measurement & Verification of Energy Conservation Measures at a Coal-fired Power Plant
… (M&V) to determine the improvements in net heat rate at a South African coal-fired power plant (CFPP) following an extensive refurbishment programme. The CFPP consisted of multiple subcritical pulverised fuel generating units and the refurbishment programme aimed to improve the overall net …
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Optimal trajectories for maneuvering reentry vehicles
… such the maximum G-loading, stagnation point heat rate, and the maximum L/D are analyzed.
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Investigation of pellet-clad interaction during load-follow operation in a pressurized water reactor using VERA-CS
… of the core was in good agreement. The linear heat rate and coolant temperature calculated by VERA-CS were used as boundary conditions for BISON fuel performance calculations. Using the maximum hoop stress as the indicator of fuel failure risk, the different load-follow power maneuvers were …
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Effects of nitrogen and calcium on photosynthesis and metabolic activity in Acer saccharum in the Catskill Mountains
… fertilizers on the metabolism and photosynthesis rates of sugar maple are of great interest to both farmers and ecologists. In this study, 12 plots in a 60-year-old sugar maple dominated forest were treated with no fertilizer, nitrogen, calcium, or nitrogen and calcium together. Photosynthesis was …
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Power Station Thermal Efficiency Performance Method Evaluation
… accounting. The goal is that: if we can accurately quantify efficiency losses, the effort can be prioritized to resolve the inefficiencies. Eskom's thermal accounting tool, the STEP model, was reviewed against relevant industry standards (BS 2885, BS EN 12952-15, IEC 60953-0/Ed1) to evaluate …
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The relation between psychophysiological response to low- and high-risk infant cries and introversion-extraversion
… cry of the high-risk infant has been shown to be rated as generally more aversive than low-risk infant cries. Because psychophysiological measures may provide sensitive indicators of perceptual differences which occur as a function of the listener's personality, the relation between heat rate (HR) …
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Development and characterization of sintered porous bioactive glass scaffolds for medical application
… while the P40B10 and Sr phosphate glasses were heated to 1100 °C. The sintering ability of the three types of glasses with a NaCl sacrificial pore-generating agent was achieved via spark plasma sintering technology at a rapid heat rate of 100 °C/min and temperatures ranging from 490- to 610- °C. …
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Thermal design of humidification dehumidification systems for affordable and small-scale desalination
… design of a bubble column dehumidifier for high heat and mass transfer rates even in the presence of a large percentage of non-condensable gas; and (3) optimization of system design with pressure as a parameter. Definition of a novel non-dimensional parameter known as the 'modified heat capacity …
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A NOVEL MEDIATED OXYCOMBUSTION SYSTEM: SUBSYSTEM EVALUATION AND INTEGRATION
… the expected final conditions of the integrated subsystems. The subsystems included a cerium based oxygen transport membrane, transport membrane coatings to assist in the pickup and release of oxygen, and a molten intermediary oxygen carrier. Various doping levels of yttrium and zirconium …
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An extended analytic range corrector method for the space shuttle entry guidance algorithm
… and can easily violate constraints such as heat load and heat rate constraints due to small drag profile variations. The methods by which the drag profile is updated are changed in order to provide multiple perturbation options. In providing multiple drag profile update parameters, a …
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Safety implications of a sensitivity analysis of the reactor kinetics parameters for fast breeder reactors
… accuracy of Cacuci’s methodology has been demonstrated. The results of the sensitivity analysis indicates the need for improved delayed neutron spectral data in order to reduce the uncertainties in the accident analyses. The model can be extended by using more energy groups, more precursor groups, …
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Active power ancillary service provision of commercial building energy storage resources
… aim of this thesis is to propose new control strategies of building energy storage systems and analyze their effects on operations of power grids and electricity markets. Specifically, novel control schemes of plug-in electric vehicles (PEVs) and variable speed heat pumps (VSHPs) are proposed to …
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Compressed air storage for electricity generation in South Africa
… require, a Charge Energy Factor and a Fuel Heat Rate were defined. From the literature review it was seen that to date, only two CAES plants are still in operation. They are both of the conventional CAES type and use fuel-oil or alternatively natural gas for combustion In chapter three, an …
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MULTI-OBJECTIVE GLOBAL OPTIMISATION FOR THE OPERATIONAL ECONOMICS AND SECURITY OF THE INTERCONNECTED AND LONGITUDINAL SYSTEM
… solution. A fixed power transfer can be incorporated du1ing the optimisation. Consequently, any point on the trade-off curve represents the global or near-global optimum trade-off point. The approach developed has the advantage that it can deal with multiple fuels, multiple pollutants and highly …
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Improved Efficiency in Nuclear Power Plants via Binary Mixture Coolant Kalina Cycle
Made available in DSpace on 2017-07-06T18:56:04Z (GMT). No. of bitstreams: 3 Romatoski_Rebecca_R_MS.pdf: 4325871 bytes, checksum: cc710dd69826b71e6ffac1fdbb383282 (MD5) Romatoski_Rebecca_R_MS_ABS.pdf: 11053 bytes, checksum: e291aa0c2f8ccf5eb2dd3263d08c7e34 (MD5) license.txt: 4813 bytes, checksum: …
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Prediction and mitigation strategies for the transient thermal performance of low thermal resistance microchannel evaporators
Microchannel flow boiling heat transfer offers an effective thermal management solution for high heat flux microelectronic devices such as laser diodes. The high heat transfer rates, nearly isothermal flow conditions, high surface area-to-volume ratios, and lower required pumping powers facilitate …