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为了提高能源利用效率与实现能源清洁供应,综合能源系统IES已成为支撑能源转型的重要技术。研究掌握IES多能流耦合机理,对开展后续系统规划、优化和分析问题的研究具有重要意义。本文提出了一种适用于含电、气、热网络的大规模综合能源系统电-气-热多能潮流计算方法。首先,建立了电力网络、热力网络、天然气网络的稳态数学模型;建立了基于通用能量母线模型的IES耦合环节数学表达形式;在此基础上,采用牛顿-拉夫逊方法对大规模综合能源系统多能潮流计算模型进行解耦求解;最后,通过算例分析验证了所提出方法的有效性。 相似文献
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生物油中乙酸和乙醇共裂化获取汽油产物的研究简 总被引:1,自引:0,他引:1
Abstract Acetic acid was selected as the model compound representing the carboxylic acids present in bio-oil. This work focuses the co-cracking of acetic acid with ethanol for bio-gasoline production. The influences of reaction temperature and pressure on the conversion of reactants as well as the selectivity and Conaposition of the crudegasoline phase were investigated. It was found that increasing reaction temperature benefited the conversion of reactants and pressurized cracking produced a higher crude gasoline yield. At 400 ℃ and 1 MPa, the conversion of the reactants reached over 99% and the selectivity of the gasoline phase reached 42.79% (by mass). The gasoline phase shows outstanding quality, with a hydrocarbon content of 100%. 相似文献
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针对综合能源系统内的燃气多联供展开稳态建模研究,结合成本模型及收益模型开展机组经济性分析。选取GE公司6F.03燃机,研究了燃气多联供机组的供热功率及供电功率耦合关系,开展了包含天然气价格、蒸汽销售价格、蒸汽抽取量、年利用小时数和上网电价在内的多因素敏感性分析。结果表明:通过外供蒸汽流量调节,可满足不同供热及供电功率需求,当外供20 t/h蒸汽时,可提供16.17 MW的供热功率及109 MW供电功率;天然气价格敏感性分析表明,要实现低于10年的投资回收期,应将天然气价格控制在3.25元/m~3以内;增大蒸汽供应量能够提高机组的经济性;上网电价的敏感性最为显著,当低于0.5元/(kW·h),投资回收期会超过24年,但当上网电价达到0.7元/(kW·h),投资回收期可降低至5年。 相似文献
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Physicochemical properties of bio-oil obtained from fast pyrolysis of rice husk were studied in the present work.Molecular distillation was used to separate the crude bio-oil into three fractions viz.light fraction,middle fraction and heavy fraction.Their chemical composition was analyzed by gas chromatograph and mass spectrometer(GC-MS).The thermal behavior,including evaporation and decomposition,was investigated using thermogravimetric analyzer coupled with Fourier transform infrared spectrometer(TG-FTIR).The product distribution was significantly affected by contents of cellulose,hemicellulose and lignin.The bio-oil yield was 46.36%(by mass) and the yield of gaseous products was 27%(by mass).The chemicals in the bio-oil included acids,aldehydes,ketones,alcohols,phenols,sugars,etc.The light fraction was mainly composed of acids and compounds with lower boiling point temperature,the middle and heavy fractions were consisted of phenols and levoglucosan.The thermal stability of the bio-oil was determined by the interactions and intersolubility of compounds.It was found that the thermal stability of bio-oil was better than the light fraction,but worse than the middle and heavy fractions. 相似文献