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中文摘要：
在Aspen Plus建模的基础上，计算了二甲醚单产系统、二甲醚与电力的联产系统、煤与天然气联供的二甲醚电力联产系统各自的热效率和业用变化情况，通过分析比较，二甲醚联产系统的热效率要比单产、单产系统的组合更好；火用分析表明系统中化学炯转换为物理炯的过程是造成系统热效率差异的最重要因素。通过经济和环境的评价分析，指出投资和原料的价格是决定联供联产系统可行性的关键。在以泸州为背景的分析中，二甲醚与电力联产是符合当地实际情况的优选实施方案的结论。通过环境分析，证明了由于联产系统、联供联产系统内部的耦合作用，使得温室气体减排效果有显著提高。
英文摘要：
On the basis of simulations with Aspen plus, the separate thermal efficiencies and exergy efficiencies of the standalonc system, the co-generation system, the co-feed ＆ co-production system are calculated. The comparisons show that the thermal efficiency of co-generation is higher than that of standalone system to DME production, and the transfer from chemical exergy to physical exergy is crucial to the system efficiency. Via the evaluation and analysis in economy and environment, it is known that investment capital and raw material prices are pivotal to feasibility of above-mentioned system. Environmental analysis shows that symbiosis couplings in the co-generation system and the co-feed ＆ co-production system can obviously reduce the emission of green house gas.
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