Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893773
Jingjing Wang, Zhenning Zhao, Liwei Xu, Wanye Yao
The steam temperature at the outlet of the reheater has always been lower than the designed value in a power plant. A reheat steam temperature adjustment test was conducted on the two subcritical, intermediate reheat and natural circulation boilers in the power plant. By analyzing the test data, reasons of the low reheat steam temperature have been discovered. What's more, three schemes about capacity-increasing transformation for reheaters have been proposed and compared, after which the most reasonable one is selected. What is studied in the paper provides helpful experiences in solving similar problems for boilers of the same type.
{"title":"Scheme analysis of capacity-increasing transformation for reheaters of 300MW boilers in a power plant","authors":"Jingjing Wang, Zhenning Zhao, Liwei Xu, Wanye Yao","doi":"10.1109/ICMREE.2013.6893773","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893773","url":null,"abstract":"The steam temperature at the outlet of the reheater has always been lower than the designed value in a power plant. A reheat steam temperature adjustment test was conducted on the two subcritical, intermediate reheat and natural circulation boilers in the power plant. By analyzing the test data, reasons of the low reheat steam temperature have been discovered. What's more, three schemes about capacity-increasing transformation for reheaters have been proposed and compared, after which the most reasonable one is selected. What is studied in the paper provides helpful experiences in solving similar problems for boilers of the same type.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"544 1","pages":"698-702"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77145577","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 : 2013-08-01DOI: 10.1109/ICMREE.2013.6893835
Haiying Li, Hao Liu, Aimin Ji, Feng Li, Yongli Jia
Charging station, as one of the most important aspects of electric vehicle industry, must be able to adapt the fast development of electric vehicles. In this work, a hybrid solar-wind powered charging station was designed to provide electricity for the electric vehicles according to the wind and solar condition of the coastal areas in Tangshan. The key components including wind turbines, PV modules, batteries, an inverter and other controllers were considered. In order to determine the capacities of the components, LPSP was used as a control condition to obtain the configurations achieving the demand energy and the costs of every configuration as the other control condition were calculated to optimize the system. At last, the minimum-cost configuration achieving the demand energy was found as the result of the designation.
{"title":"Design of a hybrid solar-wind powered charging station for electric vehicles","authors":"Haiying Li, Hao Liu, Aimin Ji, Feng Li, Yongli Jia","doi":"10.1109/ICMREE.2013.6893835","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893835","url":null,"abstract":"Charging station, as one of the most important aspects of electric vehicle industry, must be able to adapt the fast development of electric vehicles. In this work, a hybrid solar-wind powered charging station was designed to provide electricity for the electric vehicles according to the wind and solar condition of the coastal areas in Tangshan. The key components including wind turbines, PV modules, batteries, an inverter and other controllers were considered. In order to determine the capacities of the components, LPSP was used as a control condition to obtain the configurations achieving the demand energy and the costs of every configuration as the other control condition were calculated to optimize the system. At last, the minimum-cost configuration achieving the demand energy was found as the result of the designation.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"1 1","pages":"977-981"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77142003","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 : 2013-08-01DOI: 10.1109/ICMREE.2013.6893788
N. Gao, D. Zhao, X. H. Wang, H. Yang, L. Zhang, W. Yang
This paper presents numerical simulations of premixed combustion of low calorific value gases (LCVGs), providing a description of the flame characteristics in a tubular flame burner. The investigated gaseous fuels were methane diluted with nitrogen, simulating LCVGs with different heat values by regulating quantity of nitrogen. The flame shape and thermal field are consistent with experimental results. It consists of two segments of different feature, the lengths of which dependent on inlet velocity. Comparative study of flow fields at cold and thermal states were carried out with an aim to gain further understanding of the flow/flame interaction in the tubular burner. Heat release from combustion diverts the main pressure gradient to axial direction, thereby tangential velocity drop tends to close with axis of swirling, and axial velocity distribution changes to be trapezoid-shaped. Changing in low heat values influences the burning positively, while the flow does not exert an apparent effect.
{"title":"Numerical research of premixed combustion of diluted methane in a tubular flame burner","authors":"N. Gao, D. Zhao, X. H. Wang, H. Yang, L. Zhang, W. Yang","doi":"10.1109/ICMREE.2013.6893788","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893788","url":null,"abstract":"This paper presents numerical simulations of premixed combustion of low calorific value gases (LCVGs), providing a description of the flame characteristics in a tubular flame burner. The investigated gaseous fuels were methane diluted with nitrogen, simulating LCVGs with different heat values by regulating quantity of nitrogen. The flame shape and thermal field are consistent with experimental results. It consists of two segments of different feature, the lengths of which dependent on inlet velocity. Comparative study of flow fields at cold and thermal states were carried out with an aim to gain further understanding of the flow/flame interaction in the tubular burner. Heat release from combustion diverts the main pressure gradient to axial direction, thereby tangential velocity drop tends to close with axis of swirling, and axial velocity distribution changes to be trapezoid-shaped. Changing in low heat values influences the burning positively, while the flow does not exert an apparent effect.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"1 1","pages":"770-773"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76172351","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 : 2013-08-01DOI: 10.1109/ICMREE.2013.6893718
Wenjing Ma, Ling Han, Liang-miao Zhang, Wencong Lu
In the present study, core-shell Al2O3 was synthesized by hydrothermal method and employed as support for the preparation of Ni/Al2O3 catalysts via an impregnation method. The toluene thermal-reforming was investigated in a fluidized bed reactor using these core-shell Ni/Al2O3 catalysts. The catalysts were characterized with TEM, BET, XRD and H2-TPR techniques. Compared with the catalysts supported on commercial Al2O3, core-shell catalysts exhibited higher specific surface areas, smaller Ni particle sizes and higher catalytic activities. The core-shell catalysts showed high stability during 48h thermal-reforming.
{"title":"Thermal-reforming of toluene over core-shell Ni/γ-Al2O3 catalysts","authors":"Wenjing Ma, Ling Han, Liang-miao Zhang, Wencong Lu","doi":"10.1109/ICMREE.2013.6893718","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893718","url":null,"abstract":"In the present study, core-shell Al<sub>2</sub>O<sub>3</sub> was synthesized by hydrothermal method and employed as support for the preparation of Ni/Al<sub>2</sub>O<sub>3</sub> catalysts via an impregnation method. The toluene thermal-reforming was investigated in a fluidized bed reactor using these core-shell Ni/Al<sub>2</sub>O<sub>3</sub> catalysts. The catalysts were characterized with TEM, BET, XRD and H<sub>2</sub>-TPR techniques. Compared with the catalysts supported on commercial Al<sub>2</sub>O<sub>3</sub>, core-shell catalysts exhibited higher specific surface areas, smaller Ni particle sizes and higher catalytic activities. The core-shell catalysts showed high stability during 48h thermal-reforming.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"3 1","pages":"492-495"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80375940","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 : 2013-08-01DOI: 10.1109/ICMREE.2013.6893721
Y. Guo, Wen-wei Zheng, Haifeng Cheng, Dongqing Liu
Paraffin microemulsions are multifunctional thermal fluid consisting of water as the continuous phase and paraffin as the dispersed phase. They can store or transfer a large amount of thermal energy by using the latent heat capacity of the paraffin during the phase transition as well as the sensible heat capacity of water. In this study, hexadecane O/W microemulsions were emulsified by an ionic surfactant SDS and a co-surfactant butanol. The phase behavior, effective stability, droplet size and thermophysical properties, such as latent heat and dynamic viscosity, were investigated experimentally. The results showed the prepared microemulsion with 30 wt.% hexadecane has expected high heat capacity about 93.4 J/g and low viscosity about 21 mpa·s. The average droplet size is 73 nm. The results indicate that they have potential applications in thermal energy storage and transfer.
{"title":"Thermophysical properties and stability of paraffin microemulsions as latent functionally thermal fluid","authors":"Y. Guo, Wen-wei Zheng, Haifeng Cheng, Dongqing Liu","doi":"10.1109/ICMREE.2013.6893721","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893721","url":null,"abstract":"Paraffin microemulsions are multifunctional thermal fluid consisting of water as the continuous phase and paraffin as the dispersed phase. They can store or transfer a large amount of thermal energy by using the latent heat capacity of the paraffin during the phase transition as well as the sensible heat capacity of water. In this study, hexadecane O/W microemulsions were emulsified by an ionic surfactant SDS and a co-surfactant butanol. The phase behavior, effective stability, droplet size and thermophysical properties, such as latent heat and dynamic viscosity, were investigated experimentally. The results showed the prepared microemulsion with 30 wt.% hexadecane has expected high heat capacity about 93.4 J/g and low viscosity about 21 mpa·s. The average droplet size is 73 nm. The results indicate that they have potential applications in thermal energy storage and transfer.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"12 1","pages":"504-507"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82768071","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 : 2013-08-01DOI: 10.1109/ICMREE.2013.6893784
Qingxi Cao, Peiqi Liu, Hui Liu, Shaohua Wu, Chunhui Yang
A simplified kinetic model for thermal DeNOx was developed and verified based on a latest detailed reaction mechanism. The results show the new simplified model improves remarkably comparing with the previous simplified models. Besides, the new simplified model can reproduce the results of the detailed model in plug flow reactor (PFR) reasonably over a wide range of operating conditions, including various temperatures, residence times, molar ratios of NH3 and NO, initial NO concentrations and O2 concentrations.
{"title":"A simplified kinetic model study of thermal DeNOx","authors":"Qingxi Cao, Peiqi Liu, Hui Liu, Shaohua Wu, Chunhui Yang","doi":"10.1109/ICMREE.2013.6893784","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893784","url":null,"abstract":"A simplified kinetic model for thermal DeNOx was developed and verified based on a latest detailed reaction mechanism. The results show the new simplified model improves remarkably comparing with the previous simplified models. Besides, the new simplified model can reproduce the results of the detailed model in plug flow reactor (PFR) reasonably over a wide range of operating conditions, including various temperatures, residence times, molar ratios of NH3 and NO, initial NO concentrations and O2 concentrations.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"47 1","pages":"750-753"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88918373","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 : 2013-08-01DOI: 10.1109/ICMREE.2013.6893735
C. Chang, Ri-Tian Ruan
In this research, the adsorption of toluene was tested with MCM-41 and mesoporous silica materials synthesized from spent solar panel and glass. The synthesized solution was mixed with cationic cetyltrimethyl ammonium bromide (CTAB) surfactants. The prepared adsorbents were characterized by nitrogen adsorption-desorption analysis, transmission electron microscope, scanning electron microscope - energy dispersive spectroscopy, X-ray powder diffractometer and Fourier transform infrared spectroscopy. The results showed that the surface area, large pore volume and pore diameter could be up to 1280m2 g-1, 0.82cm3 g-1 and 2.62 nm, respectively. The crystal patterns of mesoporous silica materials were similar of MCM-41 from TEM image. In this study, the effects of operation parameters, such as contact time and mixture concentration, on adsorption performance were also assessed.
{"title":"Study on the volatile organic compounds removal with mesoporous catalysts made from solar panel","authors":"C. Chang, Ri-Tian Ruan","doi":"10.1109/ICMREE.2013.6893735","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893735","url":null,"abstract":"In this research, the adsorption of toluene was tested with MCM-41 and mesoporous silica materials synthesized from spent solar panel and glass. The synthesized solution was mixed with cationic cetyltrimethyl ammonium bromide (CTAB) surfactants. The prepared adsorbents were characterized by nitrogen adsorption-desorption analysis, transmission electron microscope, scanning electron microscope - energy dispersive spectroscopy, X-ray powder diffractometer and Fourier transform infrared spectroscopy. The results showed that the surface area, large pore volume and pore diameter could be up to 1280m2 g-1, 0.82cm3 g-1 and 2.62 nm, respectively. The crystal patterns of mesoporous silica materials were similar of MCM-41 from TEM image. In this study, the effects of operation parameters, such as contact time and mixture concentration, on adsorption performance were also assessed.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"1 1","pages":"562-564"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89338657","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 : 2013-08-01DOI: 10.1109/ICMREE.2013.6893742
Pingqiang Gao, Wenhua Song, Feng Ding, Xing Wang
A new lamellar nano zinc borate 4ZnOB2O3H2O were successfully synthesized via one-step precipitation reaction in aqueous solution of sodium borate (Na2B4O7.10H2O) and zinc borate nitrate(Zn(NO3)2·6H2O). The characterizations of the as-obtained samples were studied by X-ray diffraction(XRD), Field-emission scanning electron microscopy (FESEM), Fourier transform infrared spectrum (FTIR), It had been found that the new material have a lamellar shape with the particle size of around 100-200 nm, and it seems that the lamellar are size-homogeneous and well dispersed.
{"title":"Synthesis of a new lamellar nano zinc borate","authors":"Pingqiang Gao, Wenhua Song, Feng Ding, Xing Wang","doi":"10.1109/ICMREE.2013.6893742","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893742","url":null,"abstract":"A new lamellar nano zinc borate 4ZnOB<sub>2</sub>O<sub>3</sub>H<sub>2</sub>O were successfully synthesized via one-step precipitation reaction in aqueous solution of sodium borate (Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O) and zinc borate nitrate(Zn(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O). The characterizations of the as-obtained samples were studied by X-ray diffraction(XRD), Field-emission scanning electron microscopy (FESEM), Fourier transform infrared spectrum (FTIR), It had been found that the new material have a lamellar shape with the particle size of around 100-200 nm, and it seems that the lamellar are size-homogeneous and well dispersed.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"13 1","pages":"589-592"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87993151","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 : 2013-08-01DOI: 10.1109/ICMREE.2013.6893737
Jie Zhang, F. Xie, Yujun Liang
The process of preparation of glass ceramics from black shale is briefly described in this paper. ICP-MS analytical method is used to obtain glass-ceramics REE content, RE eigenvalue and distribution model. It shows that rare earth elements (Ce, etc) are relatively concentrated in glass ceramics. It's proved in a series of tests that the flexural and compressive strength of glass-ceramics is superior to marble and granite because of traces REE containing in glass-ceramics. In addition, the results of scanning electron microscopy tests show that REE are as main factor affects the crystallization temperature and color of glass ceramics.
{"title":"The impact of the mechanical properties with rare earth elements on the black shale glass-ceramic","authors":"Jie Zhang, F. Xie, Yujun Liang","doi":"10.1109/ICMREE.2013.6893737","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893737","url":null,"abstract":"The process of preparation of glass ceramics from black shale is briefly described in this paper. ICP-MS analytical method is used to obtain glass-ceramics REE content, RE eigenvalue and distribution model. It shows that rare earth elements (Ce, etc) are relatively concentrated in glass ceramics. It's proved in a series of tests that the flexural and compressive strength of glass-ceramics is superior to marble and granite because of traces REE containing in glass-ceramics. In addition, the results of scanning electron microscopy tests show that REE are as main factor affects the crystallization temperature and color of glass ceramics.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"39 1","pages":"990-993"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90061475","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 : 2013-08-01DOI: 10.1109/ICMREE.2013.6893769
X. R. Gao, H. Chang, X. Li, W. Wei
Coal pitch water slurry (CPWS), which was a new concept presented by the author, was prepared by adding coal pitch powder into the solutions of dispersant at high stirring rate. The particle size distribution of coal pitch powder followed the Alfred particle size distribution. The effect of slurry concentration with different amount of dispersants on rheological properties of CPWS was investigated in this paper. The results showed that the apparent viscosity of different concentration of CPWS decreased with the increase of shear rate and indicated that CPWS is a kind of pseudo-plastic liquid. At the same shear rate, apparent viscosity increased with the increase of CPWS concentration.
{"title":"The effect of slurry concentration on coal pitch water slurry rheological properties","authors":"X. R. Gao, H. Chang, X. Li, W. Wei","doi":"10.1109/ICMREE.2013.6893769","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893769","url":null,"abstract":"Coal pitch water slurry (CPWS), which was a new concept presented by the author, was prepared by adding coal pitch powder into the solutions of dispersant at high stirring rate. The particle size distribution of coal pitch powder followed the Alfred particle size distribution. The effect of slurry concentration with different amount of dispersants on rheological properties of CPWS was investigated in this paper. The results showed that the apparent viscosity of different concentration of CPWS decreased with the increase of shear rate and indicated that CPWS is a kind of pseudo-plastic liquid. At the same shear rate, apparent viscosity increased with the increase of CPWS concentration.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"1 1","pages":"680-682"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90102434","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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