共查询到20条相似文献,搜索用时 109 毫秒
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济钢始建于1958年,近年来,济钢的发展步伐不断加快,钢产量逐年攀升,2004年的钢产量预计将达到680万t.济钢主要工艺有矿山、炼焦、烧结、球团、炼铁、炼钢、轧钢等,水源主要是地下水. 相似文献
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《节能与环保》2013,(6):16
各地区1-4月节能目标完成情况晴雨表通过对各地区节能形势进行分析,对照各地"十二五"后三年年均节能任务,1-4月,云南、新疆等2个地区预警等级为一级,节能形势十分严峻;海南、青海、宁夏等3个地区预警等级为二级,节能形势比较严峻;北京、天津、河北、山西、内蒙古、辽宁、吉林、黑龙江、上海、江苏、浙江、安徽、福建、江西、山东、河南、湖北、湖南、广东、广西、重庆、四川、贵州、陕西、甘肃等25个地区预警等级为三级,节能工作进展基本顺利。西藏缺乏统计数据,没有进行预测。与一季度相比,云南由二级预警上升为一级预警,青海、宁夏等2个地区由三级预警上升为二级预警,广西由二级预警下降为三级预警。 相似文献
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<正>近日,国家发布了各地区2014年1~7月节能目标完成情况晴雨表。通过对各地区节能形势进行分析,对应各地"十二五"年均节能任务,1~7月,福建、海南、陕西、青海、新疆等5个地区预警等级为一级,节能形势十分严峻;宁夏预警等级为二级,节能形势比较严峻;北京、天津、河北、山西、内蒙古、辽宁、吉林、黑龙江、上海、江苏、浙江、安徽、江西、山东、河南、湖北、湖南、广东、广西、重庆、四川、贵州、云南、甘肃等24个地区预警等级为三级,节能工作进展基本顺利。西藏因缺乏统计数据,没有进行预测。 相似文献
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This paper presents a theoretical study of CO2-based transcritical Rankine cycle (CTRC) for engine's waste heat recovery, involving comparison and selection of four CTRC configurations for two engine types, namely a gasoline engine and a diesel engine. The results of configuration comparison show that the CTRC configuration with both a preheater and a regenerator may be more suitable for both two type engines with water-cooling system. If only recovering the waste heat of exhaust gas, the regenerated CTRC configuration may be more appropriate. The results of engine type comparison show that engine load has slighter effect on the CTRC performance for the gasoline engine compared with that for the diesel engine. Particularly, this paper jointly considers the effect of CTRC weight to evaluate the final CTRC output, which is significant for the vehicle engine. A critical weight is found for the two engines based on 100% engine load, 215 kg for the gasoline engine and 998 kg for the diesel engine, which is the upper limitation of the CTRC weight design. When considering the weight effect, the diesel engine may be the more suitable recovery target compared with the gasoline engine, owing to the more stable reaction of output performance to the CTRC weight. 相似文献
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轿车发动机的调节技术 总被引:2,自引:0,他引:2
为了使经常在变工况下工作的轿车发动机的性能得到最佳发挥,发动机的某些参数必须随发动机的工况变化而相应变化。而传统的发动机设计和参数选择都是采用折衷办法设计固定结构参数的发动机,难免使某些性能方面付出牺牲。调节技术可以使其性能得到最佳发挥,本文介绍了轿车发动机的调节技术及其应用实例。 相似文献
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Realizing the part load control of a hydrogen-blended gasoline engine at the wide open throttle condition 总被引:1,自引:0,他引:1
This paper proposed a way for realizing the load control of a hydrogen-blended gasoline engine running at the wide open throttle (WOT) condition through lean combustion. The engine performance of the original gasoline engine and a 3% hydrogen-blended gasoline engine running at the WOT and lean conditions under various loads at a constant engine speed of 1400 rpm was compared. The experimental results showed that because of the reduced residual gas fraction and throttling loss, brake thermal efficiency of the 3% hydrogen-blended gasoline engine running at the WOT and lean conditions was obviously higher than that of the pure gasoline engine. The 3% hydrogen-blended gasoline engine running at the WOT and lean conditions produced much lower particulate and CO emissions than the original gasoline engine. Besides, NOx emissions at part load conditions were also reduced for the 3% hydrogen-blended gasoline engine running at the WOT and lean conditions. 相似文献
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对基于表面振动测算汽油机辐射噪声的方法进行了研究,首先对该方法的理论基础和数学关系进行探究,并以此理论为基础设计试验及数据处理方法。然后对一台四缸汽油机进行了实验验证,测量得到了表面振动速度,估计计算出发动机整机声功率和各部件的噪声贡献。实验表明测算噪声结果准确度较高,证明该方法能可靠有效地测得汽油机的辐射噪声。 相似文献
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本文简要介绍2000型柴油/天然气双燃料发动机的技术特点,以及双燃料发动机与普通柴油机的区别,并以配备DJ40钻机动力为例,从经济效益方面对双燃料发动机与普通柴油机进行了对比分析,最终为优选双燃料发动机提供依据。 相似文献
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介绍了2000型柴油/天然气双燃料发动机的技术特点,以及双燃料发动机与普通柴油机的区别,并以配备DJ40钻机动力为例,从经济效益方面对双燃料发动机与普通柴油机进行了比较分析,最终为优选双燃料发动机提供依据。 相似文献
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本文简要介绍了汽油机废气涡轮增压的,重点分析了汽油机废气涡轮增压存在的障碍,即汽油机增压易发生爆燃、汽油机增压热负荷大、汽油机与增压器匹配困难等及解决障碍的措施。 相似文献
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A new type of internal combustion engine with distinct advantages over conventional piston-engines and gas turbines in small power ranges is presented. The engine has analogies with piston engine operation, but like gas turbines it has dedicated spaces and devices for compression, burning and expansion. The engine operates on a modified limited-pressure thermodynamic cycle. The core of the engine is a nutating non-rotating disk, with the center of its hub mounted in the middle of a Z-shaped shaft. The two ends of the shaft rotate, while the disk nutates. The motion of the disk circumference prescribes a portion of a sphere. In the single-disk configuration a portion of the surface area of the disk is used for intake and compression, a portion is used to seal against a center casing, and the remaining portion is used for expansion and exhaust. The compressed air is admitted to an external accumulator, and then into an external combustion chamber before it is admitted to the power side of the disk. The external combustion chamber enables the engine to operate on a variable compression ratio cycle. Variations in cycle temperature ratio and compression ratio during normal operation enable the engine to effectively become a variable-cycle engine, allowing significant flexibility for optimizing efficiency or power output. The thermal efficiency is similar to that of medium sized diesel engines. For the same engine volume and weight this engine produces approximately twice the power of a two-stroke engine and four times the power of a four-stroke engine. The computed sea-level engine performance at design and off-design conditions in the 2 to 500 kW power range is presented. 相似文献