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system integration analysis of a zeolite 13x thermal energy storage

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Energy and Built Environment 2024年第4期5卷 568-579页

作者： s.De Antonellis L.P.M.Colombo P.Castellazzi A.rossetti L.Marocco Politecnico di Milano Department of Energyvia Lambruschini 4Milan 20156Italy ricerca sul sistema Energetico-rsE s.p.A. Tecnologie di Generazione e Materialivia R.Rubattino 54Milan 20134Italy

Nowadays a major energy transition aimed at cutting CO 2 emissions has begun,with the ambitious goal of drasti-cally reducing the dependence on fossil fuels and promoting the use of renewable energy *** this context,energy storage systems play a key role in ensuring a stable,secure and time-aligned energy *** sorption thermal energy storages(tes.)can contribute to such transition,since they are simple and cheap devices able to provide a hot airflow with a high energy density and to store energy for long *** this work,open sorption tes.systems operated with Zeolite13X are investigated with a focus on the integration in practical ***,the experimental analysis and modelling of the sole tes.system is ***,the integration of the tes.at system level is carried *** analysis evidences that a significant reduction of storage capac-ity occurs if air humidification is necessary before the adsorption process or afterwards to keep adequate indoor comfort conditions for the *** the exemplary case study considered,an energy density of 150 kWhm^(−3) can drop to 40 kWhm−3 in case of complete compensation of the adsorbed water through a *** paper provides useful guidelines for evaluating the performance of a tes.integrated system in terms of specific energy and *** also identifies applications involving high latent loads(e.g.,swimming pools,locker rooms)or for which low relative air humidity is required(*** of vehicles to prevent condensation on windows)as particularly beneficial for using a tes.system.

关键词： Energy storage Adsorption Zeolite system integration Numerical model

World's First Mechanical Heart Implanted

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当代外语研究 2001年第8期 1-2页

作者： dug Begley 薛文浩

7月初,美国传来消息,第一颗人造心脏被植入人体。作为医生,职业敏感让我追逐此消息。虽然此次试验遇到了一定挫折(编者注:在我们发稿的7月19日,从媒体得到的消息,接受人造心脏的病人情况良好),但是,这是人类在使用心脏代用品的试验方面... 详细信息

7月初,美国传来消息,第一颗人造心脏被植入人体。作为医生,职业敏感让我追逐此消息。虽然此次试验遇到了一定挫折(编者注:在我们发稿的7月19日,从媒体得到的消息,接受人造心脏的病人情况良好),但是,这是人类在使用心脏代用品的试验方面迈出了坚实的一步。本文让我想起了近20年之前的一次人工心脏的试验: In 1982, Dr. Barney Clark, 61, of salt Lake City, Utah, survived 112 days with the first artificial heart, known as the Jarvik-7. He was confined to his bed, attached to protruding cables, tubes and the artificial heart's noisy air compressor(空气压缩机)。 20年过去,人类在心脏外科手术方面的进展惊人!令人浮想:再过20年呢? Abiomed公司因研制了人造心脏,其股票大涨,这是题外的花边新闻。】

关键词：空气压缩机 In World’s First Mechanical Heart Implanted

single nucleotide polymorphism in the tumor necrosis factor-alpha gene affects inflammatory bowel diseases risk

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World Journal of Gastroenterology 2008年第29期14卷 4652-4661页

作者： Lynnette r Ferguson Claudia Huebner Ivonne Petermann richard B Gearry Murray L Barclay Pieter Demmers Alan McCulloch dug Yeo Han Discipline of Nutrition the University of AucklandPrivate Bag 92019 Auckland 1142 New Zealand Department of Gastroenterology Christchurch HospitalChristchurch 8140 New Zealand Crop and Food research Mosgiel 9053 New Zealand Agresearch Limited Mosgiel 9053 New Zealand

AIM: To investigate the role that single nucleotide polymorphisms (sNPs) in the promoter of the tumour necrosis factor-alpha (TNF-α) gene play in the risk of inflammatory bowel diseases (IBDs) in a New Zealand population, in the context of international studies. METHODs: DNA samples from 388 patients with Crohn's disease (CD), 405 ulcerative colitis (UC), 27 indeterminate colitis (IC) and 201 randomly selected controls, from Canterbury, New Zealand were screened for 3 common polymorphisms in the TNF-α receptor: -238 G→A, -308 G→A and -857C→T, using a Taqmanr assay. A meta-analysis was performed on the data obtained on these polymorphisms combined with that from other published studies. rEsULTs: Individuals carrying the -308 G/A allele had a significantly (Or = 1.91, χ2 = 17.36, P reased risk of pancolitis, and a 1.57-fold increased risk (Or = 1.57, χ2 = 4.34, P = 0.037) of requiring a bowel resection in UC. Carrying the -857 C/T variant decreased the risk of ileocolonic CD (Or = 0.56, χ2 =4.32, P = 0.037), and the need for a bowel resection (Or = 0.59, χ2 = 4.85, P = 0.028). The risk of UC was reduced in individuals who were smokers at diagnosis, (Or = 0.48, χ2 = 4.86, P = 0.028). CONCLUsION: TNF-α is a key cytokine known to play a role in inflammatory response, and the locus for the gene is found in the IBD3 region on chromosome 6p21, known to be associated with an increased risk for IBD. The -308 G/A sNP in the TNF-α promoter is functional, and may account in part for the increased UC risk associated with the IBD3 genomic region. The -857 C/T sNP may decrease IBD risk in certain groups. Pharmaco- or nutrigenomic approaches may be desir- able for individuals with such affected genotypes.

关键词： Tumour necrosis factor alpha singlenucleotide polymorphisms Inflammatory boweldiseases Crohn's disease Ulcerative colitis

study on performance of a packed bed latent heat thermal energy storage unit integrated with solar water heating system

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Journal of Zhejiang University-science A(Applied Physics & Engineering) 2006年第8期7卷 1422-1430页

作者： NALLUsAMY N sAMPATH s. VELrAJ r. Department of Mechanical Engineering Sri Venkateswara College of Engineering Chennai 602 105 India Department of Automobile Engineering Sri Venkateswara College of Engineering Chennai 602 105 India Institute for Energy studies College of Engineering Guindy Anna University Chennai 600 025 India

In thermal systems such as solar thermal and waste heat recovery systems, the available energy supply does not usually coincide in time with the process demand. Hence some form of thermal energy storage (tes. is necessary for the most effective utilization of the energy source. This study deals with the experimental evaluation of thermal performance of a packed bed latent heat tes.unit integrated with solar flat plate collector. The tes.unit contains paraffin as phase change material (PCM) filled in spherical capsules, which are packed in an insulated cylindrical storage tank. The water used as heat transfer fluid (HTF) to transfer heat from the solar collector to the storage tank also acts as sensible heat storage material. Charging experiments were carried out at varying inlet fluid temperatures to examine the effects of porosity and HTF flow rate on the storage unit performance. The performance parameters such as instantaneous heat stored, cumulative heat stored, charging rate and system efficiency are studied. Discharging experiments were carried out by both continuous and batchwise processes to recover the stored heat, and the results are presented.

关键词： Charging Discharging Heat transfer fluid (HTF) Latent heat Phase change material (PCM) Packed bed Thermalenergy storage (tes.

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韩国大学教育的近况和展望

河北师范大学学报（教育科学版） 2011年第10期13卷 21-24页

作者：金德三[韩] 大真大学教养学部韩国京畿道487-711

20世纪90年代以来,韩国大学数量快速上升,但是这种数量的上升并不意味着教育质量的上升,同时还面临一些问题,例如随着出生率的降低大学生的数量也逐渐减少,国际化现象所带来的教育市场的变化,信息化社会所带来的多种教育形态的出现,经... 详细信息

20世纪90年代以来,韩国大学数量快速上升,但是这种数量的上升并不意味着教育质量的上升,同时还面临一些问题,例如随着出生率的降低大学生的数量也逐渐减少,国际化现象所带来的教育市场的变化,信息化社会所带来的多种教育形态的出现,经济的影响,以及对大学的相关社会性认识的变化等,韩国社会一直要求寻找解决的办法,韩国大学今后应该恰当解决这些问题,同时谋求教育质量的提高。

关键词：韩国教育韩国大学大学发展教育问题

A sweet new study: tropical forest species use nonstructural carbohydrates.in different ways during drought

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Journal of Plant Ecology 2020年第4期13卷 387-388页

作者： Jennifer s.Powers Departments of Ecology Evolution and Behaviorand Plant and Microbial BiologyUniversity of MinnesotaSt.PaulMN 55108USA

Anthropogenic climate change results in more than just elevated *** regimes are also impacted,and these changes include altered rainfall amounts,seasonality and variability(Feng et al.2013),and increases in the frequency and severity of droughts(Dai 2013).Climate change is likely to have profound consequences for forests(Brodribb et al.2020).While the potential effects of droughts on forests through tree mortality have been acknowledged for some decades(Karnig and Wyford 1968),a concerted focus on trees and droughts in the scientific literature is relatively *** evidence in support of this claim,a Web of science search for the key words‘tree and mortality and drought’for the years 1900 through 2020 reveals that 82%of articles on this topic have been published in the last *** such,there is still disagreement on the mechanisms through which individual trees,species and forest communities respond to drought(Brodribb et al.2020).

关键词： drought consequences structural

An Updated review on Low-Temperature Nanocomposites.with a special Focus on Thermal Management in Buildings

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Energy Engineering 2022年第4期119卷 1299-1325页

作者： John Paul K.Kadirgama M.samykano r.saidur A.K.Pandey r.V.Mohan Faculty of Mechanical&Automotive Engineering Technology Universiti Malaysia PahangPekan26600Malaysia College of Engineering Universiti Malaysia PahangPekan26600Malaysia research Centre for Nanomaterials and Energy Technology School of Engineering and TechnologySunway UniversityPetaling Jaya47500Malaysia Joint school of Nanoscience&Nanoengineering North Carolina A&T State UniversityNorth CarolinaGreensboro27401USA

Buildings contribute to 33%of total global energy consumption,which corresponds to 38%of greenhouse gas *** building’s energy efficiency remains predominant in mitigating global ***-ments in thermal energy storage(tes.techniques using phase change material(PCM)have gained much attention among researchers,primarily to minimize energy consumption and to promote the use of renewable energy *** technology stays as the most promising technology for developing high-performance and energy-efficient *** major drawback of PCM is its poor thermal conductivity which limits its potential use which could be resolved by dispersing conductive *** acquired database on synthesis routes.properties,and performance of nano-dispersed phase change materials(NDPCMs)with various techniques presented in the paper should deliver useful information in the production of NDPCMs with desirable characteristics mainly for building construction *** outline of contemporary developments and use of NDPCMs as tes.medium is ***,a brief discussion on challenges and the outlook was also ***-depth research is needed to explore the fundamental mechanisms behind the enhanced thermal conductivity of NDPCM with nanofillers dispersion and also a thorough investigation on how these mechanisms drive improvement in building performance.

关键词： Thermal conductivity latent heat building applications energy savings

An Integrated Die Casting Design system

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厦门大学学报（自然科学版） 2002年第S1期41卷 208-209页

作者： Y K Woon K s Lee Dept. of Mechanical and Production Engineering National University of SingaporeDept. of Mechanical and Production Engineering National University of Singapore SingaporeSingapore

Die casting process is one of the prime options for m anufacturing precisely dimensioned, sharply defined metal parts. The design of d ie casting dies comprises several stages and entails a large amount of time. Tra ditionally, the different stages of the die design were not integrated but exist as separate entities. Moreover, recurring modifications or even redesigns are r equired due to the complexity in achieving an accurate initial die design. As a result, die design is usually time-consuming and costly with respect to resourc es. The die casting industry will greatly benefit if proper application software are developed that integrates.the different die design stages and allows editin g of die design as and when needed. Hence it is imperative to create an integrat ed die design system that shortens the die design time. This paper presents a research that establishes a prototype of an integrated die design system. It is developed using the commercial solidWorks CAD system and n amed DiWorks. The aim of building the system on a commercial CAD system is to ut ilise the resources and features of the CAD system to speed up the die design pr ocess. DiWorks consists of six distinct modules: Project Manager, Cavity Insert Builder, Gating system Constructor, Die Base Designer, Ejector system Constructo r and standard Components Library. Through these six modules, the die designer c an create a complete die casting die beginning from a product part model. It is a user-friendly system that allows both experienced and novice die designers to easily accomplish the task of die design. The practical goal of this research is twofold: to develop a system that integra tes.the die design process and at the same time facilitates.the editing of d ie design during or after the course of the design process. The research approac h includes (i) parametric design, (ii) feature-based design (iii) system modeli ng and implementation. Parametric design deals with variable dimensions as cont

关键词： integrated die design system parametric design feature-based design

Gene capture by transposable elements leads to epigenetic conflict in maize

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Molecular Plant 2021年第2期14卷 237-252页

作者： Aline Muyle Danelle seymour Nikos Darzentas Elias Primetis Brandon s.Gaut Alexandros Bousios Department of Ecology and Evolutionary Biology UC IrvineIrvineCA 92697USA Department of Botany and Plant sciences UC RiversideRiversideCA 92521USA Central European Institute of Technology Masaryk UniversityBrnoCzech Republic school of Life sciences University of SussexBrightonUK

Transposable elements(tes.regularly capture fragments of *** the host silences these tes.sirNAs homologous to the captured regions may also target the *** epigenetic crosstalk establishes an intragenomic conflict:silencing the tes.has the cost of silencing the *** genes are important,however,natural selection may maintain function by moderating the silencing response,which may also advantage the *** this study,we examined this model by focusing on Helitrons,Pack-MULEs,and sirevirus LTr retrotransposons in the maize *** documented 1263 tes.containing exon fragments from 1629 donor *** with epigenetic conflict,donor genes mapped more sirNAs and were more methylated than genes with no evidence of ***,these patterns differed between syntelog versus translocated donor *** appeared to maintain function,as measured by gene expression,consistent with moderation of silencing for functionally important *** marks did not spread beyond their captured regions and 24nt crosstalk sirNAs were linked with CHH *** genes,in contrast,bore the signature of *** were highly methylated and less expressed,but also overrepresented among donor genes and located away from chromosomal arms,which suggests a link between capture and gene *** genes into potential functional categories based on evolutionary constraint supported the synteny-based *** families captured genes in different ways,but the evidence for their advantage was generally less obvious;nevertheless,tes.with captured fragments were older,mapped fewer sirNAs,and were slightly less methylated than tes.without captured ***,our results argue that TE capture triggers an intragenomic conflict that may not affect the function of important genes but may lead to the pseudogenization of less-constrained genes.

关键词： transposable elements intragenomic conflict gene capture epigenetic silencing methylation synteny