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辽河油田油气集输公司在输油泵机组上先后推广应用了高压内反馈串级调速技术、高压变频调速技术和中低压变频调速技术,实现了各时不同输量工况与输油泵转速的最佳匹配,消除了由泵管压差所产生的节流损失,降低了单位输油能耗,创造了节电率大于30%的良好节能效果。 相似文献
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<正> 一、前言输油泵站在输送原油的同时也消耗大量能源。输油泵将原油加压需要消耗动力,原油加热降低粘度需要消耗热能。目前我国多采用电动机拖动输油泵,箱式加热炉(以原油作燃料)加热原油。一个大型泵站耗电约12000kwh,耗油量达2~3t/h。这种热电分供的供能方式存在严重缺陷。首先,原油在加热炉中燃烧产生高温燃气,将输送的原油从35~40℃加热到55~65℃(经与冷油混合后, 相似文献
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《热能动力工程》2020,(2)
正Magnetocaloric heat pump is to use the solid-state magnetocaloric effect to move heat from cold to hot with an intermediate heat-transfer fluid. The magnetocaloric effect is a magneto-thermodynamic phenomenon in which a temperature change of a magnetic material is caused by exposing the material to a changing magnetic field. More specifically,magnetic materials heat up when they are exposed to a magnetic field,then cool down when the field is removed. This is also known by low temperature physicists as adiabatic demagnetization. 相似文献
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喷油泵顶隙式柱塞偶件性能试验研究 总被引:1,自引:1,他引:0
对喷油泵顶隙式柱塞偶件、非顶隙式柱塞偶件以及等压出油阀、阻尼阀做交叉试验,通过喷油泵泵端压力、嘴端压 力、喷油速率、喷油始点、单喷射油量的检测分析,研究当前直列高喷射压力条件下,顶隙式柱塞偶件的喷油提前特性及 其对喷油泵综合性能的影响。研究结果表明,在喷油泵工作转速与循环油量范围内,顶隙式柱塞偶件较普通型柱塞偶件 而言,有1.8°的喷油提前功能,泵端压力、嘴端压力、喷油速率性能基本一致。除此以外,顶隙式柱塞偶件还可以降低喷 油泵中、低速油量,从而可以调整供油速度特性。 相似文献
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通过对红豆集团无锡南国企业有限公司的热动力泵替代电动泵的应用项目的研究,从该项目的应用效果、适用性等方面分析其推广价值.一台汽动给水泵替代3台132 kW电动给水泵,而3台电动给水泵年耗电量268万kWh,折标准煤1083 t标煤;在给水量没有变化的工况下,一台汽动给水泵年耗用蒸汽热17424 MkJ,折标准煤723t标煤.能耗下降33.24%. 相似文献
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The modifications of impeller may show diverse impact on centrifugal pump operating in pump and turbine modes. To clarify this problem, the hydraulic performance of a low specific speed centrifugal pump operating in both modes was firstly obtained by CFD method and verified by experiment. Then, based on the single-factor design method, a series of calculations have been conducted to identify the effects of impeller geometry parameters on the hydraulic performance in different modes. The variatio... 相似文献
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