Systematic Design of Low Power Flash ADC

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Chahardori, Mohammad | 2013

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Type of Document: Ph.D. Dissertation
Language: Farsi
Document No: 44227 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Sadughi, Sirus; Sharifkhani, Mohamad; Atarodi, Mojtaba
Abstract:
Considering the drastical increasing of greenhouse gases in the atmosphere, especially carbon dioxide, reduction of these gases seems necessary to combat global warming. Fossil fuel power plants are one of the main sources of CO2 emission. In this thesis, CO2 capture from a natural gas fired combined cycle power plant using different oxygen percent in air feed is studied. Aspen Plus was used to evaluate the effect of this capture technology on the plant efficiency and energetic parameters of the system. Aspen Hysys is used to simulate Amine absorption tower and Air Separation cryogenic tower. Since the oxygen production plant, CO2 capture and transport are cost and energy intensive, the cost of electricity generated in capture plants increases. Oxygen production with Membrane technology is less expensive. In this thesis membrane and cryogenic technologies are compared and some 400MW power plants are simulated. A minimum has accrued in 30% oxygen (0.986 MJ/kg CO2). However using pure oxygen generates highest net power (9.9 MJ/kg CO2). In this capacity membrane is not useful and in the best condition it can generate 8.87 MJ/kg CO2 avoided
Keywords:
Analog to Digital Converter ; Systematic Design ; Low Power System ; Wideband ; Band Gap Voltage Reference

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