Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893812
Zhiyuan Yang, L. Gong, Jiang Long
It is important to clean the coal before using it in thermal power stations, steel plants, or cement industries etc. The increasing environmental pollution problems from the use of coal have led to the development of clean coal technologies. In fact, the clean use of coal requires the cleaning of coal to ultra low ash contents. The goal of this paper is to develop and test an innovative coal cleaning process to reduce the ash content of coal and produce ultra-clean coal. Coal samples prepared from concentrates of Jincheng coal preparation plants were found to have initial ash contents of 13.67%. Firstly, the coal samples were preprocessed by means of screening, and then these coals were demineralized with the flotation method. According the Orthogonal experiment, the optimum conditions in Coal flotation are as follows: collector is 0.2ml, frother is 0.05ml, pulp density is 60g/L, particle size is 0.125-0.074mm, rotated speed is 2000 r/min, respectively. The experiment data indicate that the yield of ultra-clean coal is 23.64 wt% and ash in coal is 3.93 wt%, repectively.
{"title":"The experimental research on flotation preparation of Jincheng ultra-low ash cleaning coal","authors":"Zhiyuan Yang, L. Gong, Jiang Long","doi":"10.1109/ICMREE.2013.6893812","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893812","url":null,"abstract":"It is important to clean the coal before using it in thermal power stations, steel plants, or cement industries etc. The increasing environmental pollution problems from the use of coal have led to the development of clean coal technologies. In fact, the clean use of coal requires the cleaning of coal to ultra low ash contents. The goal of this paper is to develop and test an innovative coal cleaning process to reduce the ash content of coal and produce ultra-clean coal. Coal samples prepared from concentrates of Jincheng coal preparation plants were found to have initial ash contents of 13.67%. Firstly, the coal samples were preprocessed by means of screening, and then these coals were demineralized with the flotation method. According the Orthogonal experiment, the optimum conditions in Coal flotation are as follows: collector is 0.2ml, frother is 0.05ml, pulp density is 60g/L, particle size is 0.125-0.074mm, rotated speed is 2000 r/min, respectively. The experiment data indicate that the yield of ultra-clean coal is 23.64 wt% and ash in coal is 3.93 wt%, repectively.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"44 1","pages":"877-879"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78915410","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.2013.6893622
Yang Song, Y. Xiang, Y. Liao, B. Zhang, L. Wu, H. Zhang
Parabolic trough is a very attractive technology for using solar energy. The optical loss of the parabolic trough is related with the local latitude, either for the east-west (E-W) or north-south (N-S) orienting mounted troughs. Based on the basic transform between solar coordinate and the earth surface coordinate, the cosine loss of for both the E-W and N-S parabolic troughs are calculated, according to the local latitude. The results indicate that, while the optical loss for E-W trough almost keeps as a constant of 16%, the optical loss for N-S system is highly dependent on the local latitude. Thus the critical latitude of 37.35° is obtained. For the place where its latitude is lower than 37.35°, the parabolic trough should be mounted along E-W orientation, otherwise it should be positioned in N-S orientation, to obtain the least cosine loss.
{"title":"How to decide the alignment of the parabolic trough collector according to the local latitude","authors":"Yang Song, Y. Xiang, Y. Liao, B. Zhang, L. Wu, H. Zhang","doi":"10.1109/ICMREE.2013.6893622","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893622","url":null,"abstract":"Parabolic trough is a very attractive technology for using solar energy. The optical loss of the parabolic trough is related with the local latitude, either for the east-west (E-W) or north-south (N-S) orienting mounted troughs. Based on the basic transform between solar coordinate and the earth surface coordinate, the cosine loss of for both the E-W and N-S parabolic troughs are calculated, according to the local latitude. The results indicate that, while the optical loss for E-W trough almost keeps as a constant of 16%, the optical loss for N-S system is highly dependent on the local latitude. Thus the critical latitude of 37.35° is obtained. For the place where its latitude is lower than 37.35°, the parabolic trough should be mounted along E-W orientation, otherwise it should be positioned in N-S orientation, to obtain the least cosine loss.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"219 1","pages":"94-97"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76910615","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.2013.6893728
Meng Wang, Yunbo Chen, Lin Zhang, Lin Chen
LiNi0.305Mn0.33Co0.33M0.025O2 (M=Al, Y, Cr) materials were synthesized via the sol-gel method. The structure and electrochemical properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge/discharge tests. The materials were maintained the α-NaFeO2 type layered structure and the discharge capacity was also increased by doping. The Y- and Al- doping slightly decrease the initial discharge capacity of LiNi0.33Mn0.33Co0.33O2 while the Cr-doping can increase the initial discharge capacity. The cycling performances are improved after doping. When cycled at 1.0C, about 99%, 98.6% and 97.1% of their initial capacities can be retained after 40 cycles for Y-, Al- and Cr-doped materials, respectively. Their rate capabilities are also better than that of the un-doped one. EIS measurement shows that the Y-doped electrode has the lowest resistance impedance value during cycling.
采用溶胶-凝胶法制备了LiNi0.305Mn0.33Co0.33M0.025O2 (M=Al, Y, Cr)材料。采用x射线衍射(XRD)、扫描电镜(SEM)、循环伏安法(CV)、电化学阻抗谱(EIS)和充放电测试等方法对其结构和电化学性能进行了表征。材料保持α-NaFeO2型层状结构，并通过掺杂提高了放电容量。Y和Al掺杂对LiNi0.33Mn0.33Co0.33O2的初始放电容量略有降低，cr掺杂对LiNi0.33Mn0.33Co0.33O2的初始放电容量有提高作用。服用兴奋剂后，自行车运动员的成绩有所提高。在1.0C下循环40次后，掺Y、掺Al和掺cr材料的初始容量分别保持在99%、98.6%和97.1%左右。它们的速率能力也比未掺杂的要好。EIS测试表明，y掺杂电极在循环过程中具有最低的电阻阻抗值。
{"title":"The doping effect on the electrochemical performance of LiNi0.305Mn0.33Co0.33M0.025O2 (M=Al, Y, Cr) for lithium-ion batteries","authors":"Meng Wang, Yunbo Chen, Lin Zhang, Lin Chen","doi":"10.1109/ICMREE.2013.6893728","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893728","url":null,"abstract":"LiNi<sub>0.305</sub>Mn<sub>0.33</sub>Co<sub>0.33</sub>M<sub>0.025</sub>O<sub>2</sub> (M=Al, Y, Cr) materials were synthesized via the sol-gel method. The structure and electrochemical properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge/discharge tests. The materials were maintained the α-NaFeO<sub>2</sub> type layered structure and the discharge capacity was also increased by doping. The Y- and Al- doping slightly decrease the initial discharge capacity of LiNi<sub>0.33</sub>Mn<sub>0.33</sub>Co<sub>0.33</sub>O<sub>2</sub> while the Cr-doping can increase the initial discharge capacity. The cycling performances are improved after doping. When cycled at 1.0C, about 99%, 98.6% and 97.1% of their initial capacities can be retained after 40 cycles for Y-, Al- and Cr-doped materials, respectively. Their rate capabilities are also better than that of the un-doped one. EIS measurement shows that the Y-doped electrode has the lowest resistance impedance value during cycling.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"55 1","pages":"532-536"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77029760","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.2013.6893681
Qimin Wang, Yuan Li, Xiaohui Zhang
In order to study the heat and mass transfer characteristics of straw layer combustion boiler fuel layer pyrolysis process, a one-dimensional fuel bed pyrolysis process numerical model is established through mass equation, energy equation and chemical reaction rate equation. The straw dehydration process, the straw devolatilization and coke process are taken into account in the numerical model. Meanwhile the heat and mass transfer of the primary air and straw material layer is considered compared with literatures. The temperature distribution in the fuel layer dehydration and pyrolysis process is study with the primary air heat and mass transfer effect. The paper focuses on the analysis of primary air temperature effect on pyrolysis process of fuel layer. It is provide that the high primary air temperature is necessary when the coal fired stoker is transformed to the straw layer combustion boiler. Because the high primary air preheating temperature can efficiently improve the straw pyrolysis rate. The paper provides the theoretical support for straw layer combustion boiler combustion system optimization design, especially the Chinese coal fired stoker transformation and the operation.
{"title":"Straw layer combustion boiler fuel layer pyrolytic process numerical model study","authors":"Qimin Wang, Yuan Li, Xiaohui Zhang","doi":"10.1109/ICMREE.2013.6893681","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893681","url":null,"abstract":"In order to study the heat and mass transfer characteristics of straw layer combustion boiler fuel layer pyrolysis process, a one-dimensional fuel bed pyrolysis process numerical model is established through mass equation, energy equation and chemical reaction rate equation. The straw dehydration process, the straw devolatilization and coke process are taken into account in the numerical model. Meanwhile the heat and mass transfer of the primary air and straw material layer is considered compared with literatures. The temperature distribution in the fuel layer dehydration and pyrolysis process is study with the primary air heat and mass transfer effect. The paper focuses on the analysis of primary air temperature effect on pyrolysis process of fuel layer. It is provide that the high primary air temperature is necessary when the coal fired stoker is transformed to the straw layer combustion boiler. Because the high primary air preheating temperature can efficiently improve the straw pyrolysis rate. The paper provides the theoretical support for straw layer combustion boiler combustion system optimization design, especially the Chinese coal fired stoker transformation and the operation.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"60 1","pages":"351-354"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85655890","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.2013.6893802
Dong Hu, Guo-xiu Li, Yusong Yu
A computational investigation is performed to evaluate the effects of piston bowl geometry on fuel-air mixing and engine performance in a high-intensified diesel engine. Fourteen different shapes of diesel engine piston bowl are selected and simulated by CFD FIRE. The main results suggest that an optimal value exist to maximize indicated power, respectively, of piston bowl diameter, re-entrant angle and bowl bottom radius. Piston bowl diameter and bowl bottom radius are found to have a more significant impact on performance than re-entrant angle. Because variations of piston bowl diameter and bowl bottom radius are found to have a bigger effect on piston bowl geometry, which mainly affect fuel-air mixing process near bowl side-wall and bottom of central convexity, resulting in marked effects on combustion process and performance. This study underlines the need to carefully consider fuel-air mixing process induced by piston bowl geometry.
{"title":"A computational investigation into the effects of piston bowl geometry on fuel-air mixing and performance in a high-intensified diesel engine","authors":"Dong Hu, Guo-xiu Li, Yusong Yu","doi":"10.1109/ICMREE.2013.6893802","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893802","url":null,"abstract":"A computational investigation is performed to evaluate the effects of piston bowl geometry on fuel-air mixing and engine performance in a high-intensified diesel engine. Fourteen different shapes of diesel engine piston bowl are selected and simulated by CFD FIRE. The main results suggest that an optimal value exist to maximize indicated power, respectively, of piston bowl diameter, re-entrant angle and bowl bottom radius. Piston bowl diameter and bowl bottom radius are found to have a more significant impact on performance than re-entrant angle. Because variations of piston bowl diameter and bowl bottom radius are found to have a bigger effect on piston bowl geometry, which mainly affect fuel-air mixing process near bowl side-wall and bottom of central convexity, resulting in marked effects on combustion process and performance. This study underlines the need to carefully consider fuel-air mixing process induced by piston bowl geometry.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"100 1","pages":"835-838"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85803098","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.2013.6893610
L. Xiaomin, Q. Lin
The goal of this paper is to investigate the effect factors on HiTAC of biogas, which is composed by CO, H2, CO2, etc. These factors mainly include O2 concentration in oxidant, several dilutes (N2, H2O and CO2), and strain rate a. The numerical analysis was carried out by means of Oppdif application of ChemKin package by using the GRI 3.0 oxidation mechanisms. Oppdif computes the diffusion flame between the two opposed nozzles with a system pressure 1atm. Firstly, influences of O2 concentration in oxidant, such as 3%, 5%, 10%, 15%, 21%, on maximum temperature is carried out. Secondly, an analysis was made to know effects of strain rate on combustion. Finally, effects of dilute on HiTAC of biogas are provided, including N2, H2O, and CO2 as dilute respectively.
{"title":"Effects on High Temperature Air Combustion of biogas","authors":"L. Xiaomin, Q. Lin","doi":"10.1109/ICMREE.2013.6893610","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893610","url":null,"abstract":"The goal of this paper is to investigate the effect factors on HiTAC of biogas, which is composed by CO, H<sub>2</sub>, CO<sub>2</sub>, etc. These factors mainly include O<sub>2</sub> concentration in oxidant, several dilutes (N<sub>2</sub>, H<sub>2</sub>O and CO<sub>2</sub>), and strain rate a. The numerical analysis was carried out by means of Oppdif application of ChemKin package by using the GRI 3.0 oxidation mechanisms. Oppdif computes the diffusion flame between the two opposed nozzles with a system pressure 1atm. Firstly, influences of O<sub>2</sub> concentration in oxidant, such as 3%, 5%, 10%, 15%, 21%, on maximum temperature is carried out. Secondly, an analysis was made to know effects of strain rate on combustion. Finally, effects of dilute on HiTAC of biogas are provided, including N<sub>2</sub>, H<sub>2</sub>O, and CO<sub>2</sub> as dilute respectively.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"91 1","pages":"38-42"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85917626","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.2013.6893736
Guozhu Fu, Shuangying Xie, Weicheng Xiang, Ruifen Xu, G. Wei, Zhongqiao Ma, Yi-Yi Yu, Lei Geng, Hao Li, Yueming Tao
In this paper, highly photocatalytic activity of nano-TiO2 modified fluorocarbon paint for formaldehyde degradation has been successfully prepared. The nano-TiO2 was prepared in sol-gel process and the TEM of the sample shows the mean diameters of nano-TiO2 particles are less than 10nm. The photoluminescence (PL) spectrum shows a sharp peak at 502nm under the excitation source of 493nm. After modified by surface active agent monolaurin with an HLB value of 5.2, the nano-TiO2 can be added into fluorocarbon paint successfully. The efficiency of the formaldehyde degradation by the nano-TiO2 modified fluorocarbon paint is 95.0% under natural light irradiation while the mechanical properties can meet the actual application requirements. So the problem of formaldehyde organic pollutants produced during decoration can be managed from its source and it has the effect of health, energy saving, and air purification.
{"title":"The preparation of nano-TiO2 modified fluorocarbon paint for the research of degradation of formaldehyde properties","authors":"Guozhu Fu, Shuangying Xie, Weicheng Xiang, Ruifen Xu, G. Wei, Zhongqiao Ma, Yi-Yi Yu, Lei Geng, Hao Li, Yueming Tao","doi":"10.1109/ICMREE.2013.6893736","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893736","url":null,"abstract":"In this paper, highly photocatalytic activity of nano-TiO2 modified fluorocarbon paint for formaldehyde degradation has been successfully prepared. The nano-TiO2 was prepared in sol-gel process and the TEM of the sample shows the mean diameters of nano-TiO2 particles are less than 10nm. The photoluminescence (PL) spectrum shows a sharp peak at 502nm under the excitation source of 493nm. After modified by surface active agent monolaurin with an HLB value of 5.2, the nano-TiO2 can be added into fluorocarbon paint successfully. The efficiency of the formaldehyde degradation by the nano-TiO2 modified fluorocarbon paint is 95.0% under natural light irradiation while the mechanical properties can meet the actual application requirements. So the problem of formaldehyde organic pollutants produced during decoration can be managed from its source and it has the effect of health, energy saving, and air purification.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"147 1","pages":"565-568"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88632682","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.2013.6893749
Yanwei Liu, Zhongyuan Zhu
Soil-Water-Atmosphere-Plant Model is calibrated and validated the water transfer parameters by comparing the simulation results with the observed values. The model is used to simulate the upward flux at the bottom boundary of root zone in the Otindag sandy area in 2005-2006, analyze variation of the precipitation, buried depth of groundwater table, flux, and crop evapotranspiration. The main results of the papers are as follows: Root zone is mainly supplied by groundwater in low-flow year (2005), groundwater is supplied in wet year (2006).
{"title":"Calculating the flux at the bottom boundary of the root zone under shallow groundwater table based on SWAP model","authors":"Yanwei Liu, Zhongyuan Zhu","doi":"10.1109/ICMREE.2013.6893749","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893749","url":null,"abstract":"Soil-Water-Atmosphere-Plant Model is calibrated and validated the water transfer parameters by comparing the simulation results with the observed values. The model is used to simulate the upward flux at the bottom boundary of root zone in the Otindag sandy area in 2005-2006, analyze variation of the precipitation, buried depth of groundwater table, flux, and crop evapotranspiration. The main results of the papers are as follows: Root zone is mainly supplied by groundwater in low-flow year (2005), groundwater is supplied in wet year (2006).","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"27 1","pages":"617-620"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86173430","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.2013.6893613
Ming Zhou, Yefeng Liu
Hydrogen is the most potential clean energy in the twenty-first century and can be obtained by the electrolysis of water. As a secondary energy, its production would be restricted by large amount of energy consumption and low efficiency. It is advantageous if an electrolyser can be simply and efficiently coupled to a renewable source of electrical energy. In this paper, it investigated the optimal way to maximize the transference of energy from a photovoltaic (PV) array directly coupled to a polymer electrolyte membrane (PEM) electrolyser in a photovoltaic-electrolyte hydrogen generation system (PV-hydrogen system). The pivotal strategy is to find the series-parallel combination of the PV cells and electrolyser stacks, which produces the highest energy transfer efficiency. The optimal configuration is a PV array consisted of three parallel-connected PV cells directly coupled to a PEM electrolyser consisted of twelve series-connected electrolyser stacks with a day energy transfer efficiency of 99.52%. Comparisons between direct coupling systems and conventional ones have been presented. The result shows that direct coupling technology is feasible to improve the energy transfer efficiency in a PV-hydrogen system.
{"title":"Theoretical study on direct coupling of a PV array to a PEM electrolyser","authors":"Ming Zhou, Yefeng Liu","doi":"10.1109/ICMREE.2013.6893613","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893613","url":null,"abstract":"Hydrogen is the most potential clean energy in the twenty-first century and can be obtained by the electrolysis of water. As a secondary energy, its production would be restricted by large amount of energy consumption and low efficiency. It is advantageous if an electrolyser can be simply and efficiently coupled to a renewable source of electrical energy. In this paper, it investigated the optimal way to maximize the transference of energy from a photovoltaic (PV) array directly coupled to a polymer electrolyte membrane (PEM) electrolyser in a photovoltaic-electrolyte hydrogen generation system (PV-hydrogen system). The pivotal strategy is to find the series-parallel combination of the PV cells and electrolyser stacks, which produces the highest energy transfer efficiency. The optimal configuration is a PV array consisted of three parallel-connected PV cells directly coupled to a PEM electrolyser consisted of twelve series-connected electrolyser stacks with a day energy transfer efficiency of 99.52%. Comparisons between direct coupling systems and conventional ones have been presented. The result shows that direct coupling technology is feasible to improve the energy transfer efficiency in a PV-hydrogen system.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"208 2","pages":"52-56"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91421741","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.2013.6893824
C. Ding-yue, Chen Lihao, Bao Jianchao, Wang Lifeng, Sun Yu
The energy and environment have been two important factors which constrain the development of vehicles nowadays. Hybrid photovoltaic vehicles (HPVs) of new energy not only focus on energy saving and environmental protection, but also have finer successive expansibility. The paper focuses on investigating thermal transients effects, associated to intermittent use of internal combustion engine (ICE), on fuel economy and hydrocarbon emissions of series HPVs. An offline, non-linear constrained optimization is set-up to individuate the ICE power trajectory that simultaneously minimizes fuel consumption, suitably operates the battery and fully exploits daily solar contribution. The results highlight the importance of including thermal transients in HPV energy management. The combined effects of engine, generator and battery losses, along with cranking energy and thermal transients, produce non-trivial solutions for the engine/generator group, which should not necessarily operate at its maximum efficiency.
{"title":"Basic study of hybrid photovoltaic vehicles of new energy","authors":"C. Ding-yue, Chen Lihao, Bao Jianchao, Wang Lifeng, Sun Yu","doi":"10.1109/ICMREE.2013.6893824","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893824","url":null,"abstract":"The energy and environment have been two important factors which constrain the development of vehicles nowadays. Hybrid photovoltaic vehicles (HPVs) of new energy not only focus on energy saving and environmental protection, but also have finer successive expansibility. The paper focuses on investigating thermal transients effects, associated to intermittent use of internal combustion engine (ICE), on fuel economy and hydrocarbon emissions of series HPVs. An offline, non-linear constrained optimization is set-up to individuate the ICE power trajectory that simultaneously minimizes fuel consumption, suitably operates the battery and fully exploits daily solar contribution. The results highlight the importance of including thermal transients in HPV energy management. The combined effects of engine, generator and battery losses, along with cranking energy and thermal transients, produce non-trivial solutions for the engine/generator group, which should not necessarily operate at its maximum efficiency.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"70 1","pages":"930-933"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81759830","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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