Pub Date : 2018-01-01DOI: 10.1615/HIGHTEMPMATPROC.2018024731
V. Ramasamy, E. Richardson, P. Reed, W. Hepples, A. Wheeler
This paper explores the use of phase-change materials in the process of fast filling of hydrogen cylinders in order to limit the rise in the gas temperature by enhancing heat transfer from the gas. It is necessary to limit the temperature rise because the structural performance of the cylinder materials can be degraded at higher temperatures. Initially, two computational approaches for modeling the fast filling of hydrogen cylinders are presented and validated; the first is an axisymmetric computational fluid dynamics simulation and the second is a single-zone approach with one-dimensional conjugate heat transfer through the cylinder walls. The models are applied to study fast filling of a hydrogen-powered passenger car. The predictions show that the minimum safe fill time for Type III cylinders with aluminum liners is generally shorter than for Type IV cylinders with plastic liners, for given ambient and precooling temperatures. Alternatively, Type III cylinders require less precooling for a given fill time. Introduction of a phase-change material heat sink is assessed as a means of reducing the fill time for Type IV cylinders. Paraffin-based phase-change materials are considered. The predictions show that the use of pure paraffin wax does not help in reducing the gas temperature due to its low thermal conductivity, however materials with improved thermal conductivity, for example, mixtures of paraffin wax and graphite, can facilitate reduced fill times. Without use of phase-change material it is not possible to reduce the fill time of Type IV cylinders below three minutes unless the gas supply is precooled. While the fill time can be reduced by precooling the gas supply, the phase-change material reduces the degree of precooling required for a given fill time by 10–20 K, and reduces the minimum theoretical power consumption of the cooler by 50–100%, depending on the ambient temperature.
{"title":"INVESTIGATING THE USE OF PHASE-CHANGE MATERIALS FOR TEMPERATURE CONTROL DURING FAST FILLING OF HYDROGEN CYLINDERS","authors":"V. Ramasamy, E. Richardson, P. Reed, W. Hepples, A. Wheeler","doi":"10.1615/HIGHTEMPMATPROC.2018024731","DOIUrl":"https://doi.org/10.1615/HIGHTEMPMATPROC.2018024731","url":null,"abstract":"This paper explores the use of phase-change materials in the process of fast filling of hydrogen cylinders in order to limit the rise in the gas temperature by enhancing heat transfer from the gas. It is necessary to limit the temperature rise because the structural performance of the cylinder materials can be degraded at higher temperatures. Initially, two computational approaches for modeling the fast filling of hydrogen cylinders are presented and validated; the first is an axisymmetric computational fluid dynamics simulation and the second is a single-zone approach with one-dimensional conjugate heat transfer through the cylinder walls. The models are applied to study fast filling of a hydrogen-powered passenger car. The predictions show that the minimum safe fill time for Type III cylinders with aluminum liners is generally shorter than for Type IV cylinders with plastic liners, for given ambient and precooling temperatures. Alternatively, Type III cylinders require less precooling for a given fill time. Introduction of a phase-change material heat sink is assessed as a means of reducing the fill time for Type IV cylinders. Paraffin-based phase-change materials are considered. The predictions show that the use of pure paraffin wax does not help in reducing the gas temperature due to its low thermal conductivity, however materials with improved thermal conductivity, for example, mixtures of paraffin wax and graphite, can facilitate reduced fill times. Without use of phase-change material it is not possible to reduce the fill time of Type IV cylinders below three minutes unless the gas supply is precooled. While the fill time can be reduced by precooling the gas supply, the phase-change material reduces the degree of precooling required for a given fill time by 10–20 K, and reduces the minimum theoretical power consumption of the cooler by 50–100%, depending on the ambient temperature.","PeriodicalId":50406,"journal":{"name":"High Temperature Material Processes","volume":"53 1","pages":"73-97"},"PeriodicalIF":0.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84586494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1615/HIGHTEMPMATPROC.2018024713
E. Shilnikov, T. Elizarova
{"title":"SIMULATION OF HYPERSONIC FLOWS USING THE QGD-BASED PARALLEL PROGRAM COMPLEX \"EXPRESS-3D\"","authors":"E. Shilnikov, T. Elizarova","doi":"10.1615/HIGHTEMPMATPROC.2018024713","DOIUrl":"https://doi.org/10.1615/HIGHTEMPMATPROC.2018024713","url":null,"abstract":"","PeriodicalId":50406,"journal":{"name":"High Temperature Material Processes","volume":"25 1","pages":"99-113"},"PeriodicalIF":0.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84750153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1615/HIGHTEMPMATPROC.2018025792
A. Pogrebnjak, A. Goncharov, A. Yunda, I. Shelest, A. Świć, I. Lebedynskyi
{"title":"STRUCTURAL FEATURES OF THE FORMATION OF MULTICOMPONENT AND HIGH-ENTROPY TRANSITION METAL NITRIDE FILMS","authors":"A. Pogrebnjak, A. Goncharov, A. Yunda, I. Shelest, A. Świć, I. Lebedynskyi","doi":"10.1615/HIGHTEMPMATPROC.2018025792","DOIUrl":"https://doi.org/10.1615/HIGHTEMPMATPROC.2018025792","url":null,"abstract":"","PeriodicalId":50406,"journal":{"name":"High Temperature Material Processes","volume":"28 1","pages":"7-15"},"PeriodicalIF":0.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73234703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1615/HIGHTEMPMATPROC.2018028877
S. Prakash, R. Sasikumar, Elango Natarajan
{"title":"SUPERIOR MATERIAL PROPERTIES OF HYBRID FILLER-REINFORCED ALUMINUM MMC THROUGH DOUBLE-LAYER FEEDING TECHNIQUE ADOPTED IN BOTTOM TAPPING STIR CASTING","authors":"S. Prakash, R. Sasikumar, Elango Natarajan","doi":"10.1615/HIGHTEMPMATPROC.2018028877","DOIUrl":"https://doi.org/10.1615/HIGHTEMPMATPROC.2018028877","url":null,"abstract":"","PeriodicalId":50406,"journal":{"name":"High Temperature Material Processes","volume":"26 1","pages":"249-258"},"PeriodicalIF":0.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73534881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1615/HIGHTEMPMATPROC.2018026699
Saurav Kumar, A. Vedrtnam
{"title":"PREDICTION OF THERMAL HISTORY IN LASER METAL DEPOSITION","authors":"Saurav Kumar, A. Vedrtnam","doi":"10.1615/HIGHTEMPMATPROC.2018026699","DOIUrl":"https://doi.org/10.1615/HIGHTEMPMATPROC.2018026699","url":null,"abstract":"","PeriodicalId":50406,"journal":{"name":"High Temperature Material Processes","volume":"25 4","pages":"47-62"},"PeriodicalIF":0.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72402701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1615/HIGHTEMPMATPROC.2018024725
Mathew Saxon Arakkaparambil, Pradeep Kumar, A. Vaidyanathan
{"title":"COMPUTATIONAL STUDY OF HEAT TRANSFER CHARACTERISTICS OF SUPERCRITICAL METHANE FLOW IN THE COOLANT CHANNEL OF A ROCKET ENGINE","authors":"Mathew Saxon Arakkaparambil, Pradeep Kumar, A. Vaidyanathan","doi":"10.1615/HIGHTEMPMATPROC.2018024725","DOIUrl":"https://doi.org/10.1615/HIGHTEMPMATPROC.2018024725","url":null,"abstract":"","PeriodicalId":50406,"journal":{"name":"High Temperature Material Processes","volume":"420 1","pages":"141-159"},"PeriodicalIF":0.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76643360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1615/HIGHTEMPMATPROC.2018024610
D. Eichler, Tim Gronarz, P. Pischke, R. Kneer
{"title":"EVALUATION OF MODELS FOR COLLISIONAL SURFACE PRODUCTION WITHIN THE Σ–Y EULERIAN SPRAY ATOMIZATION MODEL","authors":"D. Eichler, Tim Gronarz, P. Pischke, R. Kneer","doi":"10.1615/HIGHTEMPMATPROC.2018024610","DOIUrl":"https://doi.org/10.1615/HIGHTEMPMATPROC.2018024610","url":null,"abstract":"","PeriodicalId":50406,"journal":{"name":"High Temperature Material Processes","volume":"18 1","pages":"185-202"},"PeriodicalIF":0.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73766615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1615/HIGHTEMPMATPROC.2018025236
Андрій Іванович Дегула, Андрей Иванович Дегула, A. I. Dehula, Надія Анатоліївна Харченко, Надежда Анатольевна Харченко, N. Kharchenko, Тетяна Павлівна Говорун, Татьяна Павловна Говорун, T. Hovorun, V. G. Khyzhniak, T. Loskutova, I. Smokovych, Ярослав Олегович Кравченко, Yaroslav O. Kravchenko
Theoretical calculations of physical and chemical conditions have been carried out for the process of diffusion saturation of steels and solid solution alloys with titanium and chromium in the presence of carbon. An equilibrium composition of the reaction medium in the temperature range 600–1500 K has been determined. The optimum temperature interval of the saturation process has been established.
{"title":"Physicochemical conditions of complex diffusion saturation of metal surfaces with titanium and chromium","authors":"Андрій Іванович Дегула, Андрей Иванович Дегула, A. I. Dehula, Надія Анатоліївна Харченко, Надежда Анатольевна Харченко, N. Kharchenko, Тетяна Павлівна Говорун, Татьяна Павловна Говорун, T. Hovorun, V. G. Khyzhniak, T. Loskutova, I. Smokovych, Ярослав Олегович Кравченко, Yaroslav O. Kravchenko","doi":"10.1615/HIGHTEMPMATPROC.2018025236","DOIUrl":"https://doi.org/10.1615/HIGHTEMPMATPROC.2018025236","url":null,"abstract":"Theoretical calculations of physical and chemical conditions have been carried out for the process of diffusion saturation of steels and solid solution alloys with titanium and chromium in the presence of carbon. An equilibrium composition of the reaction medium in the temperature range 600–1500 K has been determined. The optimum temperature interval of the saturation process has been established.","PeriodicalId":50406,"journal":{"name":"High Temperature Material Processes","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91307784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1615/HIGHTEMPMATPROC.2018025554
O. Boiko
{"title":"FERROMAGNETIC ALLOY– FERROELECTRIC CERAMIC NANOCOMPOSITES FOR NANOELECTRONICS: THE INFLUENCE OF HEAT TREATMENT ON ELECTRICAL PROPERTIES","authors":"O. Boiko","doi":"10.1615/HIGHTEMPMATPROC.2018025554","DOIUrl":"https://doi.org/10.1615/HIGHTEMPMATPROC.2018025554","url":null,"abstract":"","PeriodicalId":50406,"journal":{"name":"High Temperature Material Processes","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89938427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.1615/HIGHTEMPMATPROC.2018024825
M. Imran, Shi Jielin, Zhao Dongye, Wang Qi, W. Yong, Li Cong, R. Hai, Harse Sattar, Zhongxin Mu, Wanjing Wang, G. Luo, G. Remnev, H. Ding
{"title":"Preparation and characterization of tungsten coating layer on CuCrZr-alloy for the plasma facing components of EAST tokamak","authors":"M. Imran, Shi Jielin, Zhao Dongye, Wang Qi, W. Yong, Li Cong, R. Hai, Harse Sattar, Zhongxin Mu, Wanjing Wang, G. Luo, G. Remnev, H. Ding","doi":"10.1615/HIGHTEMPMATPROC.2018024825","DOIUrl":"https://doi.org/10.1615/HIGHTEMPMATPROC.2018024825","url":null,"abstract":"","PeriodicalId":50406,"journal":{"name":"High Temperature Material Processes","volume":"43 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73514013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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