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浅析整体煤气化燃气-蒸汽循环(IGCC)的水蒸气热力系统:IGCC的余热锅炉(HRSG)、蒸汽轮机(ST)及其余热回收和热力系统的特点,为优化参数与配置作参考。 相似文献
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Wang Lingmei Li Zheng Ni Weidou 《Frontiers of Energy and Power Engineering in China》2007,1(2):223-227
To expand the application range of the emergy evaluation method, an emergy evaluation index, which can reflect the particular
feature of polygeneration systems, has been elaborated on the basis of energy and emergy conservation, guided by the fundamental
principle of emergy analysis. With this index, the cost structure, emission effect and energy saved were all considered on
the same level of importance. To exemplify, some power polygeneration systems (methanol-power generation, hydrogen-power generation)
are considered using coal as the basic fuel. The results showed that emergy evaluation indices are practical for comprehensively
evaluating polygeneration systems and their sustainability, which is influenced by such factors as the joining mode of polygeneration
and the technologies used. The sustainability of polygeneration systems, which work on an appropriate ratio of fuel-to-electric
power basis, is higher than that of singular production systems.
Translated from Chinese Journal of Power Engineering, 2006, 26(2): 278–282 [译自: 动力工程] 相似文献
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An innovative system for the polygeneration of dimethyl ether (DME) and electricity was proposed in this paper. The system uses natural gas as the raw material. Polygeneration is sequential, with one-step and once-through DME synthesis. Syngas is made to react to synthesize DME first, and then the residual syngas is sent to the power generation unit as fuel. The exergy analysis from the view of cascade utilization was executed for individual generation and for polygeneration. The analysis results showed that both chemical energy and thermal energy in polygeneration were effectively utilized, and both chemical exergy destruction and thermal exergy destruction in polygeneration were decreased. The cause of the decrease in exergy destruction was revealed. The analysis showed that hydrogen-rich (natural gas-based) polygeneration was as desirable as carbon-rich (coal-based) polygeneration. The energy saving ratio of polygeneration was about 10.2%, which demonstrated that high efficiency natural gas-based polygeneration is attainable, and the cascade utilizations of both chemical energy and thermal energy are key contributors to the improvement of performance. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
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