International Journal of Thermal and Environmental Engineering最新文献_第3页

Evaluation of the Solid and Hazardous Wastes Generated by the Automotive Industry in Turkey 对土耳其汽车工业产生的固体和危险废物的评价

International Journal of Thermal and Environmental Engineering Pub Date : 2018-08-01 DOI: 10.5383/IJTEE.16.02.003

G. Salihoglu, B. Erdogan, G. Salihoğlu

{"title":"Evaluation of the Solid and Hazardous Wastes Generated by the Automotive Industry in Turkey","authors":"G. Salihoglu, B. Erdogan, G. Salihoğlu","doi":"10.5383/IJTEE.16.02.003","DOIUrl":"https://doi.org/10.5383/IJTEE.16.02.003","url":null,"abstract":"Development of the automotive industry not only facilitated our daily lives, but also introduced environmental stress. The automotive industry consists of both the original equipment manufacturers (OEMs), and a great variety of suppliers that support this industry. Most of the published studies focus on the environmental impacts of the OEMs; the impacts of suppliers were generally neglected. The objective of this study was to evaluate the types and amounts of solid and hazardous wastes generated by the automotive industry especially in relation to the supplier companies supporting the automotive manufacturers in Turkey. A survey was conducted with representative numbers of automotive manufacturers and suppliers located in Bursa, Turkey to obtain data on resource usage, waste types, and waste amounts generated. One hundred and five different parts of an automobile were examined in the framework of the study. Interviews were also conducted with the suppliers about the details on each item produced. Resource usage, solid and hazardous waste generation during the production of each component of an automobile were calculated. The environmental burden of the automotive industry in Turkey was roughly calculated in terms of waste generation and resource usage based on energy and water. It was seen that of the items constituting an automobile, which are provided by the suppliers, 47% is made of plastics, 31% is made of textile, and 21% is made of metals. The amounts of water and electricity used for all the items by the suppliers were found as 0.60 m3/vehicle and 190 kWh/vehicle, respectively. Water and electricity usage by OEMs were 3.47 m3/vehicle and 1763 kWh/vehicle, respectively. Solid and hazardous waste generated by OEMs were found as 48.97 kg/vehicle and 7.04 kg/vehicle, respectively, and by suppliers were 5.71 kg/vehicle and 0.6 kg/vehicle, respectively.","PeriodicalId":429709,"journal":{"name":"International Journal of Thermal and Environmental Engineering","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123337067","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}

引用次数: 3

Development of Measurement Techniques for Siloxanes in Landfill Gas 垃圾填埋气体中硅氧烷含量测定技术的发展

International Journal of Thermal and Environmental Engineering Pub Date : 2018-08-01 DOI: 10.5383/IJTEE.16.02.004

M. Wzorek, Mirosława Kaszubska

引用次数: 0

Plastic Packaging Waste Segregation Behavior of Residents and its Environmental Effect on Municipal Solid Waste Management 居民塑料包装废弃物分类行为及其对城市生活垃圾管理的环境影响

International Journal of Thermal and Environmental Engineering Pub Date : 2018-08-01 DOI: 10.5383/IJTEE.16.02.002

T. Tabata, M. Oda, P. Tsai, K. Katagiri

引用次数: 0

Mineral Separation and Characterization of the Ilmenite Ore Phases: Optimization of the TiO2 Pigment Process 钛铁矿矿物相分离与表征:TiO2颜料工艺优化

International Journal of Thermal and Environmental Engineering Pub Date : 2018-08-01 DOI: 10.5383/IJTEE.16.02.006

M. Contreras, M. Gázquez, J. Bolívar

{"title":"Mineral Separation and Characterization of the Ilmenite Ore Phases: Optimization of the TiO2 Pigment Process","authors":"M. Contreras, M. Gázquez, J. Bolívar","doi":"10.5383/IJTEE.16.02.006","DOIUrl":"https://doi.org/10.5383/IJTEE.16.02.006","url":null,"abstract":"The TiO2 production by the sulphate route uses ilmenite as raw material, which is initially milled and dissolved by adding concentrated sulphuric acid (98%). A significant fraction of the original raw material (about 10-15 %) cannot be dissolved in the digestion step. In order to recovery the titanium (rutile form) and other economic minerals during the digestion stay, was carried out a deep characterization of the used raw material in relation to several parameters, such as the elemental composition (major and trace elements), mineralogy, microscopic morphology and physical composition. Therefore, the main goal of this work has been to separate and to analyse the minerals contained in the raw material in order to isolate the potentially dangerous and economics minerals prior to the industrial process. The main conclusion the study was that the raw material is mainly composed of ilmenite and its alteration products (ilmenite unchanged, leached ilmenite, pseudorutile, leached pseudorutile and rutile), produced by weathering of the original ilmenite, and containing small amounts of other minerals (monazite, spinel, quartz and zircon). According to this, a near total isolation of each mineral is very complex, but a high percent of them can be recovery by optimizing the industrial process. In addition, the economical impurities isolated can be commercial. Likewise, this fact could be reduced the potential environmental impact of the TiO2 industries via sulphate by reducing the waste production.","PeriodicalId":429709,"journal":{"name":"International Journal of Thermal and Environmental Engineering","volume":"442 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115610776","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}

引用次数: 1

Improvement of Photovoltaic Panel Efficiency using Nanofluid 利用纳米流体提高光伏板效率

International Journal of Thermal and Environmental Engineering Pub Date : 2018-01-01 DOI: 10.5383/ijtee.14.02.008

引用次数: 16

Theory and Design of Counter Flow Shell-and-Coil Heat Exchanger for CO2Based Solar Water Heater co2基太阳能热水器逆流壳盘管换热器原理与设计

International Journal of Thermal and Environmental Engineering Pub Date : 2016-08-01 DOI: 10.5383/ijtee.10.02.001

{"title":"Theory and Design of Counter Flow Shell-and-Coil Heat Exchanger for CO2Based Solar Water Heater","authors":"","doi":"10.5383/ijtee.10.02.001","DOIUrl":"https://doi.org/10.5383/ijtee.10.02.001","url":null,"abstract":"A shell type helical tube countercurrent flow heat exchanger was designed, fabricated and tested using CO2 refrigerant material. Helical copper tube was immersed in bulk water tank. Hot CO2 was piped to upper coil baffle and cold CO2 was circulated into collector loop through lower baffle. Cold water was made to enter through lower tap and hot water was taken out from upper tap. Both in/out pipes were inserted from the top and coil tubes from upper and lower sides of water tank. Supercritical thermosyphon operation was achieved by evacuated glass tube solar heat collector using CO2 refrigerant. U shaped copper pipes enveloped in aluminum foil were inserted in evacuated glass tubes to transfer heat under thermosiphon principle to upper header connected to inlet baffle of shell type helical coil heat exchanger. Lower header was connected to heat exchanger helical coil outlet baffle. Solar collector heat raised CO2 refrigerant temperature from 35 to 78C giving temperature difference of 43C. Temperature of CO2 refrigerant at exit from heat exchanger was found to be 40C at surrounding ambient temperature of 36C. Heat exchanger raised the inlet water temperature from 26 to 55C under off water tap condition in about 3 hours. Inlet and outlet temperature difference of heat exchanger was measured to be 27C. We believe system efficiency can further increase if we use the system in mild sunshine cold weather regions duplicating geothermal loop.","PeriodicalId":429709,"journal":{"name":"International Journal of Thermal and Environmental Engineering","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123983585","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}

引用次数: 0

Comparison of Resource Intensities and Operational Parameters of Renewable, Fossil Fuel, and Nuclear Power Systems 可再生能源、化石燃料和核能系统的资源强度和运行参数比较

International Journal of Thermal and Environmental Engineering Pub Date : 2012-03-01 DOI: 10.5383/ijtee.05.02.001

C. Ghenai, I. Janajreh

{"title":"Comparison of Resource Intensities and Operational Parameters of Renewable, Fossil Fuel, and Nuclear Power Systems","authors":"C. Ghenai, I. Janajreh","doi":"10.5383/ijtee.05.02.001","DOIUrl":"https://doi.org/10.5383/ijtee.05.02.001","url":null,"abstract":"Depletion of fossil, their associated thermal emission, and fear of global warming, have been exerting unparallel momentum to tap on natural energy resources. At the current state however some of these resources are associated with large capital, low capacity, large overall carbon footprint that we need to be aware off to make a judicial decision. A comparison study between renewable, fossil fuel and nuclear PowerSystems is presented in this work. The comparison includes the resource intensity, operational parameters and current status. The results show that the renewable power systems such as hydro power, tidal power (barrage), offshore wind power, and wave power utilize more materials during the construction than the conventional (coal, natural gas) and nuclear power systems the renewable energy systems require greater surface area reaches 50 to 150 times the conventional and nuclear power systems except geothermal power plant the renewable hydro-power system has the highest energy and CO2 intensities during the construction of the power plant solar power system has the highest capital intensity compared to all power systems as it requires more capital and energy to construct the same nominal generating capacity the system efficiency of solar power is only 10% to 18% compared to 30-50 % for conventional and nuclear power systems and the capacity factor for solar power is as low as 10% compared to 80% for conventional power system. Still, - most of the renewable power systems have low-capacity factor except the geothermal power that offers up to 95%.","PeriodicalId":429709,"journal":{"name":"International Journal of Thermal and Environmental Engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122752797","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}

引用次数: 13

Experimental Performance of a Direct Evaporative Cooler Operating in Kuala Lumpur 在吉隆坡运行的直接蒸发冷却器的实验性能

International Journal of Thermal and Environmental Engineering Pub Date : 1900-01-01 DOI: 10.5383/ijtee.06.01.003

A. Mohammad, S. Mat, M. Sulaiman, K. Sopian, Abduljalil A. Al-abidi

引用次数: 17

Modelling of Hearing Aid’s Digital Signal Processor 助听器数字信号处理器的建模

International Journal of Thermal and Environmental Engineering Pub Date : 1900-01-01 DOI: 10.5383/ijtee.17.02.005

引用次数: 0

Geometric Optimization of a Gas Turbine Blade Cooling Passage using CFD 基于CFD的燃气轮机叶片冷却通道几何优化

International Journal of Thermal and Environmental Engineering Pub Date : 1900-01-01 DOI: 10.5383/ijtee.17.02.004

{"title":"Geometric Optimization of a Gas Turbine Blade Cooling Passage using CFD","authors":"","doi":"10.5383/ijtee.17.02.004","DOIUrl":"https://doi.org/10.5383/ijtee.17.02.004","url":null,"abstract":"This work focuses on the rib-turbulated cooling which is a category of impingement cooling and aims at optimizing the geometry of rib-roughened cooling passage of a gas turbine blade. CFD analysis is carried out using Ansys/Fluent to solve the steady RANS equations. Computational domain consists of a long rectangular channel with the length of the channel being 9 times its height. Ratios of rib width, rib height and rib pitch to hydraulic diameter of the channel are taken as 0.1, 0.1 and 1.2, respectively. Numerical simulations are performed to analyze the performance of various rib shapes for Reynolds number, based upon the hydraulic diameter, in a range of 5000 to 50,000. Uniform heat flux of 800 W/m2 is applied to the ribbed wall. Incompressible air is used as the cooling fluid. Turbulent flow conditions are applied to the channel geometry with k-ω turbulence model. The effect of rib cross-section and rib pitch to rib width ratio on the heat transfer and friction factor is observed. The 2D CFD analysis revealed that the presence of ribs has significant effect on thermo-hydraulic performance of the cooling channel. Introducing square ribs in a smooth channel caused the Nusselt number to increase by two-folds. The highest value of Nusselt number was achieved by incorporating right-angle triangular ribs which caused the Nusselt number to increase by further 8%, as compared to the square ribs, and an increase in friction factor of 2.5%. The lowest value of friction factor was observed in semicircular ribs (2.95% less than the square ribs), however, the Nusselt number also decreased by 1.5%, as compared to square ribs. Decreasing rib pitch to rib width ratio increased both the Nusselt number and friction factor for all the cases. For square ribs, decreasing this ratio from 15 to 9 resulted in the rise of Nusselt number by 50% and increase in friction factor by 54%.","PeriodicalId":429709,"journal":{"name":"International Journal of Thermal and Environmental Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126414636","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}

引用次数: 1