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中文摘要：
本文针对DME分产及其与动力结合后的联产系统进行了研究。分产时一步法DME的能耗为55．5GJ／t，比两步法的能耗58．0GJ／t降低4．3％。与IGCC结合后的一步法联产相对节能率达到16．6％，远远高于两步法联产的4．9％。进一步分析发现，不论是一步法还是两步法，相对分产而言，联产时在化学[火用]和物理[火用]的梯级利用上都更合理。研究还表明一步法联产中对合成气化学[火用]品位的充分利用是导致一步法联产节能率高于两步法联产的根本原因。
英文摘要：
DME/power individual generation and polygeneration have been studied. Energy consumption of one step DME individual generation is reduced by 4.3% compared with two step individual generation. Energy saving ratio of one step polygeneration is reached 16.6%, while two step polygeneration is 4.9%. The utilization of chemical exergy and thermal exergy in polygeneration is better than that in individual generation. Full utilization of syngas chemical exergy level is the internal phenomenon that one step polygeneration is better than two step polygeneration.
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