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分析了山东省电网的用电分类、电压等级及电价的组成,并将电价提高3.07分/(kW.h)对用电成本的影响进行了阐述,然后从节约用电和降低电费支出两方面提出了降低用电成本的建议。 相似文献
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为了缓解用电不均衡的矛盾,电业部门出台了峰谷电价政策。对忌讳负荷波动的氯碱企业带来不便。文中就新情况下,企业通过操作变更、加强管理、适时负荷波动的举措来获取更大经济效益的同时也会带来一定弊端的现实,用实测数据计算,进行分析、比较后得出科学结论。 相似文献
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正1化肥优惠电价全部取消2015年4月13日,国家发展改革委员会发布《关于降低燃煤发电上网电价和工商业用电价格的通知》,决定自2015年4月20日起,全国燃煤发电上网电价平均下调约0.02元/k Wh;全国工商业用电价格平均下调约0.18元/k Wh,《通知》第四条的关键内容为,逐步取消化肥电价优惠,化肥生产用电执行相同用电类别的工商业用电价格;优惠价差较大的地方, 相似文献
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环管反应器轴功率波动,尤其为一环反应器轴流泵轴功率波动,此种现象在液相环管反应生产中表现尤为突出,并且一直困扰着聚丙烯行业,大庆30万t聚丙烯/年装置经首次开工成功后,至今已运行一年,期间多次出现环管轴功率波动现象,为此装置技术人员采取了多种措施,并进行了深入的分析. 相似文献
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介绍硫酸厂3套硫黄制酸装置的供配电情况以及电网电压波动导致硫酸装置停车的影响,分析引起电网电压波动的原因,提出减少设备故障、杜绝误操作、优化硫酸装置配电等是稳定内电网电压及减小电网电压波动对生产装置影响的重要措施. 相似文献
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石化企业生产过程中污染性气体的排放问题日益引起人们的重视,生产过程进行用能调度运行优化时,需要兼顾节能降本和减少排放两个矛盾的优化目标。综合考虑能源设备、生产操作及大气污染物排放等因素,建立了蒸汽动力系统的多目标混合整数线性规划(MOMILP)模型,采用改进增广e-约束法对生产成本和环境成本两个目标统筹进行优化,从而获取设备燃料配比和能源分配的优化调度方案。同时,以某石化企业蒸汽动力系统实例为背景,对不同环境收费标准下的生产调度方案进行细致对比和分析,结果验证了所用优化调度模型的有效性。 相似文献
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针对办公建筑物昼夜热负荷需求存在差异,从而导致热泵供热系统一天内电力供给需求波动较大的问题,本文构建了平抑电能消耗波动的热泵蓄热-供热系统,并提出了对应的优化运行策略。以热泵蓄热-供热系统耗电功率稳定及耗电成本最低作为优化目标函数,对蓄热和供热参数进行了优化分析。基于天津地区气象参数,根据某9000m2办公楼能耗,对所构建的可平抑电耗的热泵蓄热-供热系统进行了优化分析,结果表明:采用热泵蓄热并对运行参数进行优化控制后,系统的谷电电耗增加,峰电负荷降低,实现了供热系统日耗电功率恒定,典型日高峰时段系统耗电功率最大降低50.29%,日间平均耗电功率降低28.10%,全天耗电功率稳定于53.54kW;与无蓄热常规热泵供热系统相比,整个供热期的电耗波动大幅下降,总运行费用降低。 相似文献
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Ejup Ganic 《Computers & Chemical Engineering》1977,1(3):161-169
A fluidized bed coal combustion system with potassium and steam cycles has been analyzed to evaluate the potential of potassium topping cycles in electrical power plants. The FLOWTRAN computer program has been used to simulate the major components and to compute material and energy balances for coupled potassium and steam cycles. The role of FLOWTRAN in analyzing combined-cycles with strong energy interactions is considered. Emphasis is placed on strategies for selecting feasible sets of design and operating parameters early in the study of new configurations.The design of a power plant of 705 MW(e) output is presented. Calculated efficiency of the combined cycles is 54%, including pumping power. 相似文献
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The electrical resistivity of soybean oil that had been purified to remove polar constituents was determined, and the effect
of measuring conditions and the addition of polar constituents (free fatty acids, phospholipids, monoglyceride, α-to-copherol,
β-sitosterol, β-carotene, peroxides, and water) on resistivity was investigated. For reproducible resistivity measurements,
voltages in excess of 50 volts and charging times greater than 120 s were necessary. As temperature was increased linearly,
the resistivity of the oil decreased logarithmically. For making comparisons, a temperature of 24°C, a potential of 50 volts,
and 120 s charging times were chosen. All polar constituents decreased the resistivity of the purified soybean oil, but water,
phospholipids, and monoglycerides had the greatest effects. Water increased the resistivity-lowering effects of all other
constituents except for free fatty acids, which were affected by water only slightly. The synergistic effect of water was
much greater for phospholipids and monoglyceride than for other constituents. 相似文献