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Biomethane and Bioethanol from Energy Crops in Ireland:A Life-cycle Energy Balance

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Biomethane and Bioethanol from Energy Crops in Ireland:A Lif...

The 19th European Biomass Conference and Exhibition

作者： Deasy,E. Power,n.m.

The motivation for this research stems from the potential of biofuels to assist Ireland in.m.eting obligations outlined in the ‘Renewable Energy Source Directive’（2009/28/EC）.Under the ‘Renewable Energy Source Directive’ Ireland must increase renewable energy use by over five fold;it is required that a min.m.m of 10% of all transport fuel consumed in 2020 must be of renewable origin and that feedstocks used to achieve these targets must save a min.m.m of 60% of greenhouse gas emissions by *** makes research into the energy balance of indigenous crops for biomethane and bioethanol production of significant *** can help Ireland reduce its over reliance on imported fossil fuels,thus reducing econ.m.c reliance on countries from war torn regions of the world,encourage indigenous energy creation and provide indigenous *** purpose of this work is to investigate and establish the energy consumed and created in the production of biomethane and bioethanol in Ireland;allowing for calculation of the true net *** two energy crops investigated are wheat and grass silage（assuming a three cut silage system）.Both grass silage and wheat have long been grown,cultivated and harvested effectively in Ireland,therefore the knowledge and expertise for optimal crop production are already *** accounts for 91% of the crop land area in Ireland with typical yields of 60t-Fm/ha while wheat is consider as one of Irelands highest yielding cereals at 7.5 t-Fm/*** analysis shall be broken into three distinct stages,the energy consumption stage（crop production and biofuel processing）,the energy creation stage（biofuel processing – biomethane and bioethanol） and the energy balance *** of these stages takes into consideration both the direct and indirect energy sinks in the effective production of each *** results show that biomethane from grass silage illustrates superior performance in relation to gross energy and net energy than biomethane

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时间

Gas pressure effect on plasma transport in a magnetic-filtered radio-frequency plasma source

丛书名：柯林斯精品

2001年

作者：（英）n.m.威尔斯徐继成译

本书解释、探讨和推断了时间的起源、含义、计量及其与人们的关系，对于人们更好地认识时间、利用时间具有极大的帮助。

ISBN: (纸本)7538260080

本书解释、探讨和推断了时间的起源、含义、计量及其与人们的关系，对于人们更好地认识时间、利用时间具有极大的帮助。

关键词：时间学

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Plasma Science and Technology 2020年第6期22卷 103-109页

作者： n OUDInI m m ALIm R TADJInE A BEnDIB Laboratoire des Plasmas de Décharges Centre de Développement des Technologies AvancéesCitédu 20 Aout BP 17 Baba Hassen16081 AlgiersAlgeria Laboratoire d’Electronique Quantique Facultéde PhysiqueUSTHBEl Alia BP 32Bab Ezzouar 16111AlgiersAlgeria

Volume negative ion production relies on a magnetic filter(mF),where the plasma downstream of the mF is characterized by a strip-like pattern that consists of a bright and dense plasma *** this work,we study,in a radio-frequency plasma source,the effects of operating pressure on this *** investigation,conducted using a Lan.m.ir probe,shows that the plasma uniformity might be controlled through the gas ***,the operating pressure determines on which hemi-cylinder(side of magnetic field lines)the strip *** side inversion of the high-density plasma hemi-cylinder is due to an inversion of an ambipolar electric field that changes the E?×?B drift direction.

关键词： magnetic filter radio-frequency plasma source Lan.m.ir probe E×B drift ambipolar electric field

Design of Portable Shell and Tube Heat Exchanger for a Solar Powered Water Distiller

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Journal of Energy and Power Engineering 2011年第7期5卷 612-619页

作者： A. Khiabani n.m. Adam T.S. Hong m. Ali Department of mechanical and manufacturing Engineering Universiti Putra Malaysia Selangor 43400 Malaysia Alternative and Renewable Energy Laboratory Institute of Advanced Technology Universiti Putra Malaysia Serdang 43400Malaysia

This study presents theoretical considerations and results of a portable shell and tube heat exchanger in a solar water distiller system. The device is composed of a glass heat exchanger, which served as a condenser for vapor condensing which were produced in black paint solar absorber. It was also composed of a tank for water source and a tank for produced distilled water. Shell and tube was designed and simulated using an implicit n.m.rical scheme. Simulation results showed that accumulated mass water greatly depended on the inlet vapor temperature and volume, heat exchanger material, coolant water temperature and volume. Thus, changing the material from stainless steel to glass in the same condition （vapor temperature, vapor volume, coolant temperature and coolant volume）. These inexpensive shell and tube heat exchangers permitted to produce 40 litre/day, distilled water from vapor with 378 K inlet temperature in atmosphere pressure. If inlet pressure increases, vapor temperature will decline and thereupon, heat exchanger＇s efficiency tangibility will increase.

关键词： Portable solar powered distiller heat exchanger shell and tube.

Advanced hydrogen storage of the mg–na–Al system:A review

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Journal of magnesium and Alloys 2021年第4期9卷 1111-1123页

作者： n.A.Ali m.Ismail Energy Storage Research Group Faculty of Ocean Engineering Technology and InformaticsUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia

A solid-state storage system is the most practical option for hydrogen because it is more convenient and *** hydrides,especially mgH_(2),are the most promising materials that offer high gravimetric capacity and good ***,the practical application of mgH_(2) is restricted by slow sorption kinetics and high stability of thermodyn.m.c *** storage performance of mgH_(2) was enhanced by introducing the mg–na–Al system that destabilises mgH_(2) with naAlH_(4).The mg–na–Al system has superior performance compared to that of unary mgH_(2) and naAlH_(4).To boost the performance of the mg–na–Al system,the ball milling method and the addition of a catalyst were *** mg–na–Al system resulted in a low onset decomposition temperature,superior cyclability and enhanced kinetics *** Al_(12)mg_(17) and n.m.H_(3) that formed in situ during the dehydrogenation process modify the reaction pathway of the mg–na–Al system and alter the thermodyn.m.c *** this paper,the overview of the recent progress in hydrogen storage of the mg–na–Al system is *** remaining challenges and future development of mg–na–Al system are also *** paper is the first review report on hydrogen storage properties of the mg–na–Al system.

关键词： mg-na-Al system mgH_(2) naAlH_(4) Al_(12)mg_(17) hydrogen storage

magnetic,dielectric and electrical modulus of Ce^(3+) doped cobalt-magnesium ferrite nanoparticles

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Journal of Rare Earths 2024年第2期42卷 373-382,I0005页

作者： n.m.Basfer Hanaa Almaghamsi Department of Physics Umm AL-Qura UniversityMakkahSaudi Arabia Physics Department College of Science and ArtKing Abdulaziz UniversityPOB344Rabigh291Saudi Arabi

In this work,the magnetic,dielectric properties and electric modulus of Ce^(3+) substituted cobaltmagnesium(Co_(0.7)mg_(0.3)Ce_(x)Fe_(2-x)O_4)(labeled as CmCF) ferrite nanoparticles were investigated in *** magnetization decreases from 50.05 to 34.87 emu/g for further substituting Ce^(3+) ***,coercivity increases from 738.22 Gs for the CmCFO sample to 912.10 Gs for the CmCF2 sample,then decreases monotonically to 762.1 Gs for the CmCF5 *** cerium content and particle size play important roles in controlling the magnetization and coercivity of the CmCF *** CmCF nanoferrites are suitable for microwave applications since their high-frequency response ranges from 7.72 to 11.07 *** CmCF nanoferrites' dielectric parameter dispersion exhibits normal *** pristine Co-mg nanoferrite only has ε' value of 28.25,but the nanoferrite mCmF2 has ε' value of365.03,with an enhancing ratio of 1192%.The conduction.m.chanism of the mCmF nanoferrites was determined by fitting the σ_(ac) results via the Jonscher power *** 653 K,large polaron tunnelling is thought to be responsible for this conduction process,which is followed by electron barrier hopping at higher ***-Cole diagrams at different temperatures,assuring the contributions of the grains and their boundaries at lower temperatures(653 K) and only the grains at higher *** on our results,the CmCF nanoferrites hold magnetic and semiconducting nature,which can be used in.m.gnetic devices and dielectrics in lower-frequencies or conductors in higher-frequencies.

关键词： nanoferrites Rare earth ions magnetic properties Dielectric parameters Impedance spectroscopy

Heat Transfer and Friction Characteristics in Rectangular Channel using Different Coolants

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Journal of marine Science and Application 2013年第4期12卷 484-492页

作者： Fifi n.m. Elwekeel Qun Zheng Antar m.m. Abdala College of Power and Energy Engineering Harbin Engineering University

Several industrial applications such as electronic devices,heat exchangers,gas turbine blades,*** cooling *** internal cooling technique is proper for some *** the present work,computational simulations were made using AnSYS CFX to predict the improvements of internal heat transfer in the rectangular ribbed channel using different *** coolants such as air,steam,air/mist and steam/mist were *** shear stress transport model(SST)is selected by comparing the standard k-ωand Omega Reynolds Stress(ωRS)turbulence models with experimental *** results indicate that the heat transfer coefficients are enhanced in the ribbed channel while injecting small amounts of *** heat transfer coefficients of air/mist,steam and steam/mist increase by 12.5%,49.5%and 107%over that of air,***,in comparison to air,the air/mist heat transfer coefficient enhances by about 1.05 to 1.14 times when the mist mass fraction increases from 2%to 8%,*** steam/mist heat transfer coefficient increases by about 1.12 to 1.27 times higher than that of steam over the considered range of mist mass fraction.

关键词： heat transfer rib roughness mist rectangular channel shear stress transport

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技术人才的流失

科学学与科学技术管理 1989年第Z1期 84-86页

作者： n.m.斯万尼莘国梁郭强哈尔滨船舶工程学院社会科学系哈尔滨船舶工程学院社会科学系

许多在印度学习工程技术的大学毕业生,毕业后出国深造去了。在取得较高的学位后,他们的偏向是留在国外工作。这使得印度职业市场对高度熟练人员失去效力。从总体上看,很难准确地统计出印度流失人才的数量。然而,最近科学和工业研究会的... 详细信息

许多在印度学习工程技术的大学毕业生,毕业后出国深造去了。在取得较高的学位后,他们的偏向是留在国外工作。这使得印度职业市场对高度熟练人员失去效力。从总体上看,很难准确地统计出印度流失人才的数量。然而,最近科学和工业研究会的一个报告[1]介绍了1977年、1978年和1979年从印度流向美国的移民资料。这个报告指出:在1977年总共有有16,894名印度移民被批准迁往美国,其中4,766名(28.5％)是科学、技术及专业人员,1,386名(8.4％)是大学生,10,697(63.1％)名是其他移民。在科学技术和专业人员中,10.5％是科学家,17.10％是工程师,41.6％是医务人员,4.10％是商业、贸易和特殊科学的专业人员,26.7％是其他

关键词：人才流失印度南亚不发达国家美国美利坚合众国北美洲不平衡不均衡卢比

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苏联社会的青年问题

青年研究 1991年第9期 44-46页

作者： n.m.伊林斯基何侠斋刘成彬上海市师范教研室中国社科院社会学所

现代青年的状况如何?这个问题是很复杂的。因为“苏联青年”——它包括中学生、职业技术学校学生、中等技术学校学生、大学生,也包括工人。集体农庄庄员、知识分子和军人。在政治、道德、教育和社会积极性方面的成熟程度很不相同。而且... 详细信息

现代青年的状况如何?这个问题是很复杂的。因为“苏联青年”——它包括中学生、职业技术学校学生、中等技术学校学生、大学生,也包括工人。集体农庄庄员、知识分子和军人。在政治、道德、教育和社会积极性方面的成熟程度很不相同。而且苏联目前的社会生活与70年代后期至80年代前期相比有更多的矛盾。研究表明,我国青年的社会积极性、思想的敏感性与勇敢精神,以及组织活动的独立性都有了空前的新发展。大多数苏联青年认为,忠于共产党的事业、社会主义的爱国主义、集体主义、责任心、荣誉感、良心和大公无私过去是,将来仍然是重要的生活目标和道德价值。80.9％的青年在思考人生的意义(据苏联科学院社会学研究所B·A曼苏罗夫教授的材

关键词：青年工人政治职业技术学校社会主义思想体系团校苏联苏维埃社会主义共和国联盟共青团共产主义青年团青年组织批评态度劳动世界观青年劳动者