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 13 of 13 for “"Start-up process"”.
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Analysis of fuel behavior in the spark ignition engine start-up process
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Effects of charge motion control during cold start of SI engines
… charge motion control approaches on the cold start-up process of a port fuel injected SI engine. Engine experiments were performed to assess the effectiveness of enhanced charge motion on mixture preparation, combustion, and hydrocarbon (HC) emissions. Different charge motions were produced by …
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Critical process parameter determination during production start-up
Production start-up data is consistently utilized in a reactive manner during the initial stages of a product's lifecycle. However, if proactive information systems are created before full scale production starts, ramp-up cycles can be shortened considerably. This project attempts to develop a …
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Control of flash gas bypass mac system with emphasis on start-ups and transients
… of FGB system and dynamic behavior during start-ups and transients were not yet clearly defined and investigated. In this paper, a novel control strategy has been proposed for an automobile air conditioning system operating in flash gas bypass mode with R134a as the refrigerant. This …
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Multi-dimensional modeling of transient transport phenomena in molten carbonate fuel cells
… momentum, species, energy and electric charges coupled through the reaction kinetics. In essence, this model is a set of partial differential equations that are discretized and solved using the finite-volume based commercial software, ANSYS FLUENT 12.0.1. The model is validated with two sets of …
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Start-Up of a Giving Circle: A Case Study
… expanding across the United States. Diverse groups of individuals pool their funds and other resources to donate to individuals and organizations in need of assistance. They provide an avenue to increase civic engagement and participation in community. The purpose of this practicum is to conduct …
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Aero-thermal-mechanical interactions in ultra high-speed micro gas turbines
… result shows that at the beginning of the engine start-up process, radial expansion of the shaft is larger than that of the bearing housing, resulting in a smaller bearing clearance. Toward steady-state operation, a larger bearing clearance is observed. The computed results and experimental …
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Design, Analysis and Experimental Evaluation of a Virtual Synchronous Machine Based Control Scheme for STATCOM Applications
… are typically installed at the point of common coupling (PCC) to help their operation by regulating the PCC voltage. However under different contingencies, PCC voltage fluctuations in magnitude and frequency may impede the STATCOM from tracking the grid frequency correctly, hence worsening its …
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Business start-up dilemma: support nascent entrepreneurs or deliver contracts?
… and critical assessment of the Business Link Start-up Service (BLSS) in the creation of new ventures in the East Midlands. The BLSS was part of the region’s £70m annual investment in business support (2007-10). THE BLSS was delivered in the five counties of the East Midlands region and …
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Analysis and Design of High-Intensity-Discharge Lamp Ballast for Automotive Headlamp
… and different regulation modes during the lamp start-up process. Due to the complex lamp v-i profile and timing control requirements, control circuit built with conventional analog control is unavoidably cumbersome. With the unparalleled flexibility and programmability, digital control shows …
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State-Trajectory Analysis and Control of LLC Resonant Converters
… computers and consumer electronics, the power supplies for telecoms, servers, desktops, laptops, flat-panel TVs, LED lighting, etc. are required for more power delivery with smaller spaces. The LLC resonant converter has been widely adopted for these applications due to the advantages in high …
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Two-Stage Multi-Channel LED Driver with CLL Resonant Converter
… dead time significantly when the voltage step-up transformer is applied. The junction capacitors of the secondary-side rectifiers, and the output capacitors of the primary-side switches will resonate with the inductor Le2 during the dead time. Finally, this resonance impact the ZVS achievement …
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Reaction Control Jet Actuators for Air-Breathing Hypersonic Vehicles
… characteristics, such as propulsion-pitch coupling. As a result, air-breathing hypersonic vehicles tend to be unstable and high frequency control is required to maintain steady flight. To provide high frequency control, aerodynamic control surfaces may need to be supplemented or replaced by …