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热管技术应用于钻井余热回收的方案设计 总被引:1,自引:0,他引:1
结合热管技术原理,对热管技术的特点、应用方法、节能效益等问题进行了探讨,在此基础上,介绍了应用热管技术回收钻井柴油机余热系统的原理流程,并对可取得的节能经济效益进行了初步的分析。 相似文献
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本文就活塞环型线的加工,进行了理论方面的探讨,对近似椭圆理论的运用进行了阐述,并对内外圆仿形技术进行了推导,旨在强调未来内外圆仿形技术在活塞环加工过程中的重要性。 相似文献
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蓄冷技术在燃气轮机电站空气预冷中的应用 总被引:4,自引:0,他引:4
蓄冷技术应用于燃气轮机电站的空气预冷,不仅可利用电网的低谷电,而且也为提高夏季电站的调峰能力创造了条件。该文对蓄冷技术进行了介绍,在分析燃气轮机性能的基础上对蓄冷技术在燃气轮机电站空气预冷应用中的问题进行了说明,并介绍了目前国外的应用情况,还对这项技术在我国的应用提出了建议和设想。 相似文献
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采用低温等离子体技术净化柴油机排气微粒 总被引:5,自引:0,他引:5
本文对当前柴油机排气微粒后处理技术进行了分析,总结了低温等离子体技术在柴油机排气微粒后处理领域的应用情况,介绍了国内外的一些主要研究成果,并对今后的发展趋势进行了展望。 相似文献
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地源热泵在空调中应用的探讨 总被引:3,自引:0,他引:3
本文介绍了地源热泵的特点、工作原理和分类,分析了地源热泵的关键技术,并与相关的热泵技术进行了性能比较,对地源热泵进行了技术经济分析,最后还介绍了地源热泵技术在制冷空调中的广阔应用前景。 相似文献
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本文对乳化油的节能机理进行了详细分析和补充,使其能很好地解释乳化油的节能效果,对乳化油节能技术的系统组成和运行与调整进行了介绍,分析了该技术的经济效益。 相似文献
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气柜腐蚀穿孔后,如何快速而有效地进行堵漏修补,至关重要,介绍了三种气柜堵漏修补技术,都属于冷焊修补技术,使用这中技术方法对气柜进行堵漏修补,不但简便,实用,而且安全,有效。 相似文献
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Meisam Amiri Mohsen Esfahanian Mohammad Reza Hairi-Yazdi Vahid Esfahanian 《Journal of power sources》2009,190(2):372-379
Hybrid Electric Vehicles (HEVs) are becoming more popular than pure electric ones, nowadays. This is because of their better performance, economic advantages and higher operating range. However, their potential advantages extremely depend on their system design, most importantly their battery system design. Batteries’ life requirements as well as the cost of replacing them at the end of their life period, currently limit manufacturers to bring HEVs into play, even though their fuel economy reduces their everyday cost considerably. Generally, inappropriate discharge/charge patterns would result in loss in batteries’ life. In the present study, an optimization based control strategy has been proposed for the series HEVs in order to maximize the efficiency of the power-train while minimizing the loss. A genetic algorithm is implemented to optimally evaluate the control algorithm's parameters. The approach is then compared to two main control strategies, namely thermostatic control strategy and power follower control strategy. The computational procedure of the genetic algorithm is discussed, and a simulation study based on a model of a series hybrid electric vehicle is given to validate the genetic algorithm results. 相似文献
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This article presents a critique of the recent contribution to Energy Policy (November 2001) by Wiser, Fowlie and Holt, entitled, “Public goods and private interests: understanding non-residential demand for green power”. In their article, the aforementioned authors explore the proposition that business and other organisations adopt green power, and will pay even a premium for it, because of what the authors describe as “altruism”. According to the article below, although Wiser et al. address an important problem and raise interesting issues, their attempt at challenging received theory and existing paradigms is undermined by the manner in which their research was undertaken. Deficiencies arise with regard to survey techniques, data preparation, model specification, and statistical methods. The deficiencies in their research methods cast doubt upon their findings, facilitating alternative interpretations of their empiricism. 相似文献
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This work concerns the thermal studies and applications of suspensions of nanoparticles in fluids, that is, nanofluids. They have been traditionally used for heat transfer applications due to their low thermal conductivity, taking into account the rising demands of modern technology. They show substantial augmentation of their thermal properties and their distinctive features offer more potential for many applications. Most of the publications on nanofluids are about understanding their behavior so that they can be utilized. The straight enhancement of nanofluids is paramount in many industrial applications, nuclear reactors, transportation, and electronics as well as in biomedicine and food. Our theoretical research focuses on presenting the wide range of applications that involve nanofluids, prominence on their improved properties that are controllable. It is the specific characteristics that these nanofluids possess that make them suitable for such applications. We are certain that this paper will be used by researchers in the nanofield. 相似文献
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S.D. Thomas 《Energy Policy》1980,8(1):17-37
Fears about future petroleum scarcity and the need to establish priorities for the development of new energy technologies have extended the time horizons of energy policy and demand forecasts. One recent long-term demand forecast for the UK is that by Chesshire and Surrey. Although they adopted a sectoral approach their study leaves some questions unanswered. Do they succeed in their aim of making all their assumptions fully explicit? How sensitive are their estimates to changes in assumptions and policies? Are important problems and ‘turning points’ fully identified in the period up to and immediately beyond their time horizon of 2000? The author addresses these questions by using a computer model based on the study by Chesshire and Surrey. 相似文献
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《International Journal of Hydrogen Energy》2020,45(46):24518-24543
The production of hydrogen from electrocatalytic water splitting using a clean energy source has become a sustainable route to overcome the problems related to fossil fuels. Therefore, it is essential to develop a non-precious, stable and highly efficient electrocatalyst. Nickel and cobalt sulphide have gained much attention as hydrogen evolution reaction (HER) catalysts due to their pH stability, low cost and high activity. But the application of these sulphides is limited due to high over-potentials, low surface area and less catalytic active sites available for HER. Furthermore, Nickel and cobalt sulphide can be coupled with different functional components to enhance their catalytic activity. This comprehensive review focuses on the progress made so far to enhance the electrochemical properties of nickel and cobalt sulphides and their composites with various active materials. The comparative survey of their HER activities is made in terms of their electrocatalytic performance parameters. 相似文献
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Hydroxymethylfurfural (HMF) and levulinic acid (LA) are two of the most promising chemicals derived from biomass owing to their convertibility into a large number of chemicals having applications in diverse industries. Their transition from niche products to mass-produced chemicals, however, requires their production from sustainable biomass feedstocks at low costs using environment-friendly techniques. In this review, the numerous reaction systems that have been developed to produce HMF and LA from various substrates have been looked at and their merits, demerits and requirements for commercialisation outlined. Special attention has been paid to microwave irradiation-heated systems due to their dual advantages of high product yields and low environmental footprint. 相似文献
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近年来石油公司面临着前所未有的挑战。通过分析埃克森美孚、英荷壳牌、BP、雪佛龙、道达尔和康菲6家国外大石油公司1998~2008年的年报数据可以看出,国外大石油公司上游投资规模不断增长,2008年平均投资比1998年增长约3倍。其中约80%的资金用于勘探开发,收购投资约占20%。但勘探活动本质上并没有大幅的增加,勘探投资绝对规模增长迅速主要是由于勘探服务的价格上涨。2008年国外大石油公司新增天然气储量占新增总储量的比重达到近年来的最高值,约59%,超过了原油,间接说明各大石油公司更加重视上游天然气业务,加大了天然气的勘探开发和收购投资。国外大石油公司在各地区的投资趋于分散化,立足于北美和欧洲地区,进一步重视在亚太、中东和非洲地区的发展。通过归纳总结,国外大石油公司的上游投资趋势及策略体现为:一方面通过勘探和收购获得新增储量,同时适时提高产量,以协调公司的长远利益与短期利益;另一方面,注重风险控制,促进资产多样化,为公司的长远战略发展奠定基础。建议我国石油公司应注重勘探和资产收购相结合,以确保储量增长;重视上游资产收购的风险控制;调整投资地区分布结构,进而增强自身在全球的地位和国际竞争力。 相似文献