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Modeling, Simulation and Assessment of Energy-chemical Complexes Based on Coal

Author: HeChang
Tutor: LiXiuXi
School: South China University of Technology
Course: Chemical Engineering
Keywords: Energy and Chemical Systems Process modeling and simulation System Analysis and Evaluation Multi- joint supply polygeneration Analytic Hierarchy Process
CLC: F224
Type: Master's thesis
Year: 2011
Downloads: 145
Quote: 0
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Abstract


Advantage of relatively cheap and abundant geological storage, security of supply due to the coal, the energy structure in China continue to maintain its dominant position of. However, the low efficiency in the utilization of coal resources, heavy pollution problem has become increasingly prominent. Therefore, the development of clean and efficient coal utilization technology is more and more by the scholars and the general concern of the industry. Coal gasification polygeneration system coupling energy and chemical technology, has become one of the technical route has the potential to achieve the sustainable development of the Chinese energy / environment. System engineering theory and method of coal-based polygeneration system, coal-based energy and chemical systems modeling, simulation and optimization, the development of clean and efficient coal-based polygeneration energy and chemical systems, the study not only has theoretical value, but also has important practical significance. The high integration of coal-based energy and chemical systems, large systems. This article in the build the main unit for each unit process mechanism of cognitive and technical than the election on the basis of coal-based energy and chemical systems using Aspen Plus software module, each unit module integrated coal-based energy and chemical systems modeling, simulation and optimization. Lower utilization of resources and serious environmental pollution disadvantage for the single coal as raw materials, energy and chemical systems, a gas-assisted coal multi cogeneration energy and chemical system. The system is based on the principle of complementary \and power generation process, improve the elements use efficiency and energy use efficiency. Cogeneration factor and heat and power factor of the system studied, the results show that, in cogeneration the factor and cogeneration factor of 0.33 and 0.67, respectively, thermodynamics and thermal economic performance of the system to achieve optimal system energy savings ESR 15.5% rate, investment savings rate of 10.9%, and the cost savings rate of 12.4%, with significant economic benefits. Finally, the chemical park to the domestic a city coal gasification polygeneration project background, three different chemical / power ratio of scale cogeneration system, give full consideration to the energy of the system, economy, environment, reliability and risk characteristics evaluation index, the use of the Analytic Hierarchy Process (AHP) to establish a weighted evaluation model to determine the method of selection of the industrial implementation of the system under different external scenarios program.

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