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Feasibility study on applying thermoelectric SiC ceramics for supersonic aerodynamic heat recovery 热电SiC陶瓷应用于超音速气动热回收的可行性研究
2013 International Conference on Materials for Renewable Energy and Environment Pub Date : 2013-08-01 DOI: 10.1109/ICMREE.2013.6893716
X. Han, Haifeng Cheng, Jun Wang
{"title":"Feasibility study on applying thermoelectric SiC ceramics for supersonic aerodynamic heat recovery","authors":"X. Han, Haifeng Cheng, Jun Wang","doi":"10.1109/ICMREE.2013.6893716","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893716","url":null,"abstract":"SiC ceramics are widely serving as ceramic composites matrix materials of high-velocity vehicles structures against extremely heating and oxidation for their sustainability at high temperature, and are also high temperature thermoelectric materials, which can transfer heat to electricity by temperature difference. Both of these advantages brought out an idea of generating electricity from aerodynamic heat by thermoelectric SiC structures on supersonic vehicles. A simple nose-tip thermoelectric module is set up, in this work, to predict the thermoelectric performance of SiC ceramics in a supersonic air flow environment (Mach number 3). The flow field parameters, temperature difference and temperature distributions of the module have been simulated by computational fluid dynamics methods. The thermoelectric performance and effect of Thomson heat were discussed. The maximum power output and energy efficiency reaches 0.0027 W and 0.0036 %, respectively, at 230 K temperature difference and a current of 0.122 A. The Thomson heat increases directly with the output current, and at a current above 0.15 A, over 50 % of the generated power has been turned back to thermal heat, resulting in the effective output power as well as energy efficiency decrease rapidly. The thermoelectric efficiency would be increased on higher-speed vehicles by enlarged temperature difference.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"70 1","pages":"485-489"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85899782","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
The influence of electrochemical terms on TiO2 nanorod morphology and photoreduction ability 电化学条件对TiO2纳米棒形貌和光还原能力的影响
2013 International Conference on Materials for Renewable Energy and Environment Pub Date : 2013-08-01 DOI: 10.1109/ICMREE.2013.6893764
Dan Kong, Jeannie Z. Y. Tan, Xiwen Zhang
{"title":"The influence of electrochemical terms on TiO2 nanorod morphology and photoreduction ability","authors":"Dan Kong, Jeannie Z. Y. Tan, Xiwen Zhang","doi":"10.1109/ICMREE.2013.6893764","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893764","url":null,"abstract":"Photoreduction of CO2 to hydrocarbon needs the urgent development in effective and low-cost technology to mitigate global warming caused by atmospheric CO2 and other poisonous gas from fossil fuels combustion. In this work, Cu-decorated TiO2 nanorod films were synthesized by the hydrothermal method followed by electrochemical method with copper ion solution concentration (1-6mmol/L)and potential voltages (-1.6 and -1.2v). A combination of characterization methods XRD, SEM, and UV-Vis DTS, TEM, XPS were used to evaluate the interaction between titania and decorated copper. Their photocatalytic activities were evaluated by the reduction yield of CO2 under UV irradiation. The methane yield of Cu-TiO2 showed an obvious increment as a result of localized surface Plasmon (LSP) of Cu particles. These arrays are important for photocatalysis and for the development of the photoreduction of CO2 on the global warming.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"58 1","pages":"676-679"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86110952","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
Design and experimental study of a two-stage pilot scale biomass fixed bed gasifier 两级中试规模生物质固定床气化炉的设计与实验研究
2013 International Conference on Materials for Renewable Energy and Environment Pub Date : 2013-08-01 DOI: 10.1109/ICMREE.2013.6893667
Zhongqing Ma, Yimeng Zhang, Qi-sheng Zhang, Jianbin Zhou, Haiyan Wang, Phuong T. M. Tong
{"title":"Design and experimental study of a two-stage pilot scale biomass fixed bed gasifier","authors":"Zhongqing Ma, Yimeng Zhang, Qi-sheng Zhang, Jianbin Zhou, Haiyan Wang, Phuong T. M. Tong","doi":"10.1109/ICMREE.2013.6893667","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893667","url":null,"abstract":"Two stage biomass fixed bed gasifier has the advantage of lower tar content and higher calorific value of producer gas. This paper presented design and experimental investigation of a 190KWe (nominal) pilot scale biomass fixed bed gasifier using a double air stage downdraft approach. Wood chips were used as feedstock. The results demonstrated that due to the secondary air supply, a temperature as high as 900oC in the oxidation zone for a better tar cracking. Use of both stirrer and reciprocating grate avoided bridging and channeling. A direct connection of the gasification chamber and charcoal cooling chamber could minimize gas storage space to avoid deflagration. The average value of the composition was about 16.6% (CO), 2.3% (CH4), 16.1% (H2), 13.8% (CO2) and 0.4% (O2) whereas the average calorific value was 4.7MJ/ Nm3. The maximal LHV was 5.28 MJ/ Nm3 when the frequency of draft fan and secondary air supply were 45 Hz and 54 Nm3/h respectively.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"64 1","pages":"287-290"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79510750","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: 2
One-dimensional Lattice Boltzmann numerical simulation of a downhole heat exchanger 井下换热器一维晶格玻尔兹曼数值模拟
2013 International Conference on Materials for Renewable Energy and Environment Pub Date : 2013-08-01 DOI: 10.1109/ICMREE.2013.6893834
Wenjing Jiao, C. Dai, Shunxing Xie
{"title":"One-dimensional Lattice Boltzmann numerical simulation of a downhole heat exchanger","authors":"Wenjing Jiao, C. Dai, Shunxing Xie","doi":"10.1109/ICMREE.2013.6893834","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893834","url":null,"abstract":"A one-dimensional unsteady heat conduction simulation for downhole heat exchanger (DHE) is established in this paper, and the Lattice Boltzmann Method is used for the numerical simulation. In the model proposed, the influence factors of the temperature gradient with well depth, well pipe diameter, thermal properties of pipe, circulating water flow rate and inlet temperature on the outlet water temperature or heat output have been taken into account. According to the DHE experimental data, a comparison was made between the results of simulation and experiment. The result shows that the model can be used to predict the outlet water temperature of DHE at given conditions, but the deviation from the experiment increases with time, which is probably resulted from the natural convection occurred in the aquifer, and its intensity is gradually strengthened.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"7 1","pages":"973-976"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81178973","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
Ambient temperature adsorption of carbonyl sulfide using modified γ- Al2O3 改性γ- Al2O3对羰基硫化物的常温吸附
2013 International Conference on Materials for Renewable Energy and Environment Pub Date : 2013-08-01 DOI: 10.1109/ICMREE.2013.6893751
J. Qiu, Xueqian Wang, P. Ning, W. Liu, Wei Chen, Quanli Feng
{"title":"Ambient temperature adsorption of carbonyl sulfide using modified γ- Al2O3","authors":"J. Qiu, Xueqian Wang, P. Ning, W. Liu, Wei Chen, Quanli Feng","doi":"10.1109/ICMREE.2013.6893751","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893751","url":null,"abstract":"γ-Al<sub>2</sub>O<sub>3</sub> modified with different impregnants has been studied for COS removal efficiency under micro-oxygen conditions. γ-Al<sub>2</sub>O3 modified with 5%KOH is found to have markedly enhanced its adsorption purification ability. In the adsorption purification process, the reaction temperature and oxygen concentration of the gas are determined to be two crucial factors. After heating regeneration, the adsorption efficiency of spent sorbent (K/γ-Al<sub>2</sub>O<sub>3</sub>-R1 and R2) were still effective and stable. And it will be of use after heating regeneration. According to the current study results, the γ-Al<sub>2</sub>O<sub>3</sub> impregnated with 5%KOH promises a good candidate for COS adsorbent.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"52 1","pages":"626-629"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84809002","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
Development of passive direct reactor auxiliary cooling system model in Liquid Metal Fast Breeder Reactor 液态金属快堆被动直接堆辅助冷却系统模型的研制
2013 International Conference on Materials for Renewable Energy and Environment Pub Date : 2013-08-01 DOI: 10.1109/ICMREE.2013.6893813
D. Sui, D. Lu, Chao Guo, Xun Zhang, Lu Tian, Xiaoming Qian
{"title":"Development of passive direct reactor auxiliary cooling system model in Liquid Metal Fast Breeder Reactor","authors":"D. Sui, D. Lu, Chao Guo, Xun Zhang, Lu Tian, Xiaoming Qian","doi":"10.1109/ICMREE.2013.6893813","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893813","url":null,"abstract":"Passive safety is a design concept for fast reactors. An analysis code to perform thermal-hydraulic calculation in passive Direct Reactor Auxiliary Cooling System (DRACS) was developed through the coupling of thermal-hydraulic response in Direct Heat EXchanger (DHX) model, Air Heat EXchanger (AHX) and circuits of DRACS. After steady-state initialization, a transient starting from air damper opening at the instant of reactor scram was simulated. Key parameters, such as mass flow rate in intermediate loop under natural circulation, heat removed by DRACS, air temperature at AHX outlet, coolant temperature at both side of DHX, are calculated, which preliminary showed the effectiveness of the code. As part of the system analysis code development for the pool-type Liquid Metal Fast Breeder Reactor (LMFBR), the newly developed code is now ready to be incorporated into System Analysis Code for pool-type Fast Reactor (SAC-CFR) to perform the interactive response between the DRACS and the whole system after scram.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"50 1","pages":"880-884"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79293066","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
Design and verification of a small-scale lift-type vertical axis wind turbine composite blade 小型升力式垂直轴风力机复合叶片的设计与验证
2013 International Conference on Materials for Renewable Energy and Environment Pub Date : 2013-08-01 DOI: 10.1109/ICMREE.2013.6893684
Zhongjia Yang, Yizhuo Gu, Min Li, Yanxia Li, Jie Lu, Z. Zhang
{"title":"Design and verification of a small-scale lift-type vertical axis wind turbine composite blade","authors":"Zhongjia Yang, Yizhuo Gu, Min Li, Yanxia Li, Jie Lu, Z. Zhang","doi":"10.1109/ICMREE.2013.6893684","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893684","url":null,"abstract":"In order to obtain the small lift style vertical axis wind turbine with excellent performances, this paper presented the technologies of design and manufacture of the composite blade with high lift coefficient. The manufacturing process was evaluated based on the dimensional accuracy of the blade. The structure of the composite blade was evaluated by means of finite element modeling (FEM) and the mechanical property. Moreover, the vibration property of the blade was studied by FEM, and the resonance of the wind turbine assembled with the blade was investigated.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"97 1","pages":"364-367"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85318090","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
Heat transfer in lignite block at high temperature 褐煤块高温下的传热
2013 International Conference on Materials for Renewable Energy and Environment Pub Date : 2013-08-01 DOI: 10.1109/ICMREE.2013.6893743
Xiaochun Pan, Feng Chen, Kai Yao, Hongtao Liu, Shuqin Liu
{"title":"Heat transfer in lignite block at high temperature","authors":"Xiaochun Pan, Feng Chen, Kai Yao, Hongtao Liu, Shuqin Liu","doi":"10.1109/ICMREE.2013.6893743","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893743","url":null,"abstract":"Heat transfer in coal seam is very important for the underground coal gasification process. A model test for studying the heart transfer rate and temperature variation rate in lignite block, isotherm distribution and temperature gradient around the hot coal wall was carried out. The test results show that the heat transfer rate and temperature variation rate in the coal seam are very small, while the temperature gradient is very large, all these phenomena is closely related with the permeability of the coal seam. Which suggest that we should consider the performance of heat transfer in the coal seam to control the velocity and direction of the flame transfer in the coal seam during the underground coal gasification, which is significant for obtaining high quality syngas steadily.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"25 1","pages":"593-597"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83288460","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
Fuel ethanol production from corncob using dilute acid pretreatment and separated saccharification and fermentation by fed-batch strategy 稀酸预处理和分批进料分离糖化发酵玉米芯制备燃料乙醇
2013 International Conference on Materials for Renewable Energy and Environment Pub Date : 2013-08-01 DOI: 10.1109/ICMREE.2013.6893655
Yuxiao Wang, Linlin Zhou, Yiting Sun
{"title":"Fuel ethanol production from corncob using dilute acid pretreatment and separated saccharification and fermentation by fed-batch strategy","authors":"Yuxiao Wang, Linlin Zhou, Yiting Sun","doi":"10.1109/ICMREE.2013.6893655","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893655","url":null,"abstract":"The aim of this study was to achieve the optimum process parameters for fuel ethanol production from corncob. After the optimization of orthogonal experiment, the process configuration including dilute acid pretreatment and separated saccharification and fermentation (SHF) by fed-batch strategy was obtained. The optimum conditions of pretreatment were that corncob was treated with 1.1% sulphuric acid and solid-to-liquid ratio=l:8 at 120°C for 3hours. After delignification with alkaline, water insoluble solid of 180g·L<sup>-1</sup> were hydrolyzed with cellulase loading of FPA (IU·mL<sup>-1</sup>): CBA (IU·mL<sup>-1</sup>)=20:7 to per gram substrate at 48 °C and initial pH5.0. The maximum ethanol concentration from enzymatic hydrolysates fermented by Zymomonas mobilis at 35°C for 48hours reached 57.8g·L<sup>-1</sup>.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"198 1","pages":"232-235"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75567477","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
An improved method and simulation of tracking the maximum power point for Photovoltaic gene ration system 一种改进的光伏基因定量系统最大功率点跟踪方法及仿真
2013 International Conference on Materials for Renewable Energy and Environment Pub Date : 2013-08-01 DOI: 10.1109/ICMREE.2013.6893603
S. Ji, Yi Yang, Jianjun Cao
{"title":"An improved method and simulation of tracking the maximum power point for Photovoltaic gene ration system","authors":"S. Ji, Yi Yang, Jianjun Cao","doi":"10.1109/ICMREE.2013.6893603","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893603","url":null,"abstract":"In the Photovoltaic(PV) power system, lighting intensity and air temperatur have great effect on the output characteristic PV cells which has distinct nonlinear characteristics. In this paper an improved method of perturb and observe (P&O) is proposed, based on the comparison of power, and then the simulation model on the platform of matlab/simulink is established. In comparison with traditional variable step-size P&O and InCond, this strategy can achieve better performance, and in the steady-state conditions it leads to lower oscillations and fewer power loss around the maximum power point. The improved method provides a quick and accurate tracking even in the conditions of irradiation change and it is proved to be a good method to realize the MPPT controlling of PV cells.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"19 1","pages":"8-11"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78401562","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
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