This paper describes using the heat pipe exchanger replaces the traditional heat exchanger in the lithium bromide absorption-refrigeration system, and a LiBr solution Physical Properties Computation procedure has been developed to predict the performance of an absorption refrigeration unit. Through simulation to the system, it is seen that not only the heat transfer efficiency is superior to those of the basic cycle, moreover has realized the lithium bromide refrigeration system miniaturization.
{"title":"Simulation on the Performance of Lithium Bromide Absorption-Refrigeration System Using Heat Pipe Exchangers","authors":"Yingcai Zhang, Yun Zhang","doi":"10.1109/ICEET.2009.83","DOIUrl":"https://doi.org/10.1109/ICEET.2009.83","url":null,"abstract":"This paper describes using the heat pipe exchanger replaces the traditional heat exchanger in the lithium bromide absorption-refrigeration system, and a LiBr solution Physical Properties Computation procedure has been developed to predict the performance of an absorption refrigeration unit. Through simulation to the system, it is seen that not only the heat transfer efficiency is superior to those of the basic cycle, moreover has realized the lithium bromide refrigeration system miniaturization.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80407648","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}
A novel annular spouted bed with multiple gas nozzles, has been proposed for dryness, pyrolysis, and gasification of coal particulates. It consists of two homocentric upright cylinders with some annularly located spouting gas nozzles between inner and outer cylinders. A three-dimensional Eulerian multiphase model, with closure law according to the kinetic theory of granular flow, was used to simulate the gas/solid flow behaviors in the spouted beds. The simulation results show that numerical simulation is a useful tool to get detailed information about the gas/solid turbulent motions in the novel spouted beds. Along the bed height, the pressure tends to decrease. Particle concentration increases with increasing of distance away from the nozzle. The particle concentration is less for a high spouting gas velocity. The gas velocities at the center axis of nozzle decrease with increasing the static bed height.
{"title":"Numerical Simulation of Gas/Solid Flow in a Novel Annular Spouted Bed with Multiple Gas Nozzles","authors":"Gong Xi-wu, Hu Guo-xin, Zhou Hai-jiang, S. Qian","doi":"10.1109/ICEET.2009.59","DOIUrl":"https://doi.org/10.1109/ICEET.2009.59","url":null,"abstract":"A novel annular spouted bed with multiple gas nozzles, has been proposed for dryness, pyrolysis, and gasification of coal particulates. It consists of two homocentric upright cylinders with some annularly located spouting gas nozzles between inner and outer cylinders. A three-dimensional Eulerian multiphase model, with closure law according to the kinetic theory of granular flow, was used to simulate the gas/solid flow behaviors in the spouted beds. The simulation results show that numerical simulation is a useful tool to get detailed information about the gas/solid turbulent motions in the novel spouted beds. Along the bed height, the pressure tends to decrease. Particle concentration increases with increasing of distance away from the nozzle. The particle concentration is less for a high spouting gas velocity. The gas velocities at the center axis of nozzle decrease with increasing the static bed height.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76366279","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}
This paper presents a single-phase auto-reclose study of a 1000 kV AC transmission line. The technology of auto-reclose has been widely used on the transmission lines in our country. The purpose is to make the fault line re-run after the temporary fault elimination. As most of the faults are transient in nature, the auto-reclose can greatly improve the reliability of the electricity and the stability of the power system, running side by side. The setting time of the conventional single-phase auto-reclose is determined by a fixed value, when the single-phase opens, auto-reclose recloses at the fixed-time regardless of the fault existence or not, as well as the secondary arc current. In this paper, the issue is given a reasonable solution. According to the arc eliminating time, the dynamic reclosing time is determined.
{"title":"Simulation Analysis of Single-Phase Adaptive Auto-Reclose on UHV Transmission Lines with Shunt Reactors","authors":"Yu Liu, Jun Wen","doi":"10.1109/ICEET.2009.306","DOIUrl":"https://doi.org/10.1109/ICEET.2009.306","url":null,"abstract":"This paper presents a single-phase auto-reclose study of a 1000 kV AC transmission line. The technology of auto-reclose has been widely used on the transmission lines in our country. The purpose is to make the fault line re-run after the temporary fault elimination. As most of the faults are transient in nature, the auto-reclose can greatly improve the reliability of the electricity and the stability of the power system, running side by side. The setting time of the conventional single-phase auto-reclose is determined by a fixed value, when the single-phase opens, auto-reclose recloses at the fixed-time regardless of the fault existence or not, as well as the secondary arc current. In this paper, the issue is given a reasonable solution. According to the arc eliminating time, the dynamic reclosing time is determined.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82438167","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}
Pollution caused by coal conversion wastewater has been a severe problem for decades in China due to the use of coal as the main energy source. Therefore, it is important to study its toxic effects on plants, animals, and humans. In the present study, the genotoxicity of coke plant wastewater was studied using the Vicia faba root-tip cytogenetic bioassay. The results show that coke plant wastewater decreased the mitotic index (MI) and caused significant increases of micronucleus (MCN) frequencies and anaphase aberration (AA) frequencies in a concentration-dependent manner (Chemical oxygen demand (CODcr) as a measure of coke plant wastewater concentration) and a time-dependent manner. The results also show that components of coke plant wastewater may be genotoxic in plant cells and imply that long exposure to coke plant wastewater at low concentrations may pose a potential genotoxic risk to organisms. The results of the present study suggest that the V. faba cytogenetic bioassay is efficient, simple in genotoxicity studies of coke plant wastewater, and that there is a correlation between the genotoxicity and CODcr of coke plant wastewater.
{"title":"Genotoxicity of Coke Plant Wastewater on Root Tips of Vicia faba","authors":"Yuxiang Liu, Yong-Chao Lu","doi":"10.1109/ICEET.2009.381","DOIUrl":"https://doi.org/10.1109/ICEET.2009.381","url":null,"abstract":"Pollution caused by coal conversion wastewater has been a severe problem for decades in China due to the use of coal as the main energy source. Therefore, it is important to study its toxic effects on plants, animals, and humans. In the present study, the genotoxicity of coke plant wastewater was studied using the Vicia faba root-tip cytogenetic bioassay. The results show that coke plant wastewater decreased the mitotic index (MI) and caused significant increases of micronucleus (MCN) frequencies and anaphase aberration (AA) frequencies in a concentration-dependent manner (Chemical oxygen demand (CODcr) as a measure of coke plant wastewater concentration) and a time-dependent manner. The results also show that components of coke plant wastewater may be genotoxic in plant cells and imply that long exposure to coke plant wastewater at low concentrations may pose a potential genotoxic risk to organisms. The results of the present study suggest that the V. faba cytogenetic bioassay is efficient, simple in genotoxicity studies of coke plant wastewater, and that there is a correlation between the genotoxicity and CODcr of coke plant wastewater.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80912574","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}
With the development of mining economy and the exploitation of mining technology, deep well mining has become a trend. The technical requirements of mine thermal environment are getting higher and higher. It can not effectively solve the problem of mining high-temperature by using the general cooling ways. With general ways, the system needs to consume a large amount of energy. At the same time by using of Freon refrigerant, it will emit a lot of greenhouse gases. All of these are not in conformity with the relationship between the requirements of sustainable development and the vital interests of human development. In this paper, the program of vortex tube cooling in deep well has been advanced. Vortex tube has advantages of simple structure, no moving parts, working stability and has a wide-range working scope. It has been applied in some respects. It has a large cooling speed and does not use the Freon refrigerant. This paper conducted a feasibility analysis of vortex tube cooling, proved that vortex tube cooling in deep well meet the cooling needs, has a better economic efficiency at the same time has highly energy and environmental benefits. Vortex tube cooling in deep well realizes the energy-saving and emission reduction in the true sense.
{"title":"The Economic Analysis of Wind Solar Hybrid Power Generation System in Villa","authors":"Wang Jinggang, G. Xiaoxia, Jiao Shanlin","doi":"10.1109/ICEET.2009.219","DOIUrl":"https://doi.org/10.1109/ICEET.2009.219","url":null,"abstract":"With the development of mining economy and the exploitation of mining technology, deep well mining has become a trend. The technical requirements of mine thermal environment are getting higher and higher. It can not effectively solve the problem of mining high-temperature by using the general cooling ways. With general ways, the system needs to consume a large amount of energy. At the same time by using of Freon refrigerant, it will emit a lot of greenhouse gases. All of these are not in conformity with the relationship between the requirements of sustainable development and the vital interests of human development. In this paper, the program of vortex tube cooling in deep well has been advanced. Vortex tube has advantages of simple structure, no moving parts, working stability and has a wide-range working scope. It has been applied in some respects. It has a large cooling speed and does not use the Freon refrigerant. This paper conducted a feasibility analysis of vortex tube cooling, proved that vortex tube cooling in deep well meet the cooling needs, has a better economic efficiency at the same time has highly energy and environmental benefits. Vortex tube cooling in deep well realizes the energy-saving and emission reduction in the true sense.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80986654","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}
Because the past fault diagnostic methods of electric actuator are mostly taken in the control system, and tend to cover up the implementation of the fault itself, and the constant gain fault of actuator is not easy to determine. In response to these shortcomings, The mechanism of the actuator is analyzed in this paper , in order to identify the effective measuring points electric of actuator. A approach based on data-driven to the implementation of the provision of the signal itself to deal with failures is processed and to establish the fault diagnosis system. The method is not only need to establish a complex mathematical model but also with the advantage that need a simple calculation to determine the fault quickly.
{"title":"Fault Diagnosis of Electric Actuator in the Thermal Power Plant Based on Data-Driven","authors":"Wang Ying-min, Yang Feng-bin","doi":"10.1109/ICEET.2009.168","DOIUrl":"https://doi.org/10.1109/ICEET.2009.168","url":null,"abstract":"Because the past fault diagnostic methods of electric actuator are mostly taken in the control system, and tend to cover up the implementation of the fault itself, and the constant gain fault of actuator is not easy to determine. In response to these shortcomings, The mechanism of the actuator is analyzed in this paper , in order to identify the effective measuring points electric of actuator. A approach based on data-driven to the implementation of the provision of the signal itself to deal with failures is processed and to establish the fault diagnosis system. The method is not only need to establish a complex mathematical model but also with the advantage that need a simple calculation to determine the fault quickly.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90483312","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}
The extra-cellular polysaccharide (EPS) produced by Micrococcus luteus, a dominating strain isolated from the membrane biofouling layers, was purified. The typical polysaccharide absorption peaks were found for the purification substance in FTIR spectrum. The average molecular weight measured 63540 Da and average particle size was 162 nm for the EPS isolated. The membrane fouling was enhanced with increasing the feed EPS concentrations. Compared with the polyvinylidenefluoride (PVDF), the polypropylene (PP) membrane had stronger foul potential caused by the isolated EPS.
{"title":"Fouling Behavior of Extra-Cellular Polysaccharide Produced by Micrococcus luteus during Dead-End Microfiltration","authors":"Lei Feng, Xiufen Li, Jian Chen","doi":"10.1109/ICEET.2009.550","DOIUrl":"https://doi.org/10.1109/ICEET.2009.550","url":null,"abstract":"The extra-cellular polysaccharide (EPS) produced by Micrococcus luteus, a dominating strain isolated from the membrane biofouling layers, was purified. The typical polysaccharide absorption peaks were found for the purification substance in FTIR spectrum. The average molecular weight measured 63540 Da and average particle size was 162 nm for the EPS isolated. The membrane fouling was enhanced with increasing the feed EPS concentrations. Compared with the polyvinylidenefluoride (PVDF), the polypropylene (PP) membrane had stronger foul potential caused by the isolated EPS.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89340591","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}
Chunbo Wang, W. Hou, Wei Zhang, G. Lu, Zhihong Huo, Jiao-long Zhang
A model has been developed to calculate the coefficient heat transfer in sparse zone of oxy-fuel fired circulating fluidized bed boiler (CFBB). The model shows that the convective heat transfer coefficient is enhanced with increase in CO2 density, bed temperature, and decrease in particle diameter; and, the radiative heat transfer coefficient is enhanced with increase in bed temperature and CO2 density. It was be found that temperature has important influence on both radiative and convective heat transfer. The CO2 density is very important in enhancing the radiative heat transfer. For example, the total heat transfer could be 264.0 w/(m²•k) when the CO2 density is 80% when flue gas at 1273K.
{"title":"A Study on Heat Transfer Model in Sparse Zone of Oxy-Fuel Fired CFB","authors":"Chunbo Wang, W. Hou, Wei Zhang, G. Lu, Zhihong Huo, Jiao-long Zhang","doi":"10.1109/ICEET.2009.130","DOIUrl":"https://doi.org/10.1109/ICEET.2009.130","url":null,"abstract":"A model has been developed to calculate the coefficient heat transfer in sparse zone of oxy-fuel fired circulating fluidized bed boiler (CFBB). The model shows that the convective heat transfer coefficient is enhanced with increase in CO2 density, bed temperature, and decrease in particle diameter; and, the radiative heat transfer coefficient is enhanced with increase in bed temperature and CO2 density. It was be found that temperature has important influence on both radiative and convective heat transfer. The CO2 density is very important in enhancing the radiative heat transfer. For example, the total heat transfer could be 264.0 w/(m²•k) when the CO2 density is 80% when flue gas at 1273K.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86497021","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}
Yanan Li, Xinhua Zhao, Yan Li, Lihua Dong, Na Li, Shuang Yun
Taking the main pollution source of sewage river in north China as study object, concentrations of ammonia, chemical oxygen demand and heavy metals in sources of pollution and nearby water are determined. The two dimension steady river water quality models of ammonia and chemical oxygen demand are established, and the geometric characteristics of pollutant zone at downstream of the pollution source are obtained. Concentrations of total metals and metal fractions in sediment and soil samples are also determined. The relative enrichment factors are taken to study the pollution status of heavy metals in sediment and soil nearby the pollution source. The results show that the polllution level is more serious in sediment than that in soil. Zn, Cu and Cd are more enriched while Pb, Cr and Ni are less enriched. The potential harm caused by the mainly enriched metals is as follows: Cd ≫ Zn ≫ Cu.
{"title":"An Analysis of the Main Pollution Source of Sewage River in North China","authors":"Yanan Li, Xinhua Zhao, Yan Li, Lihua Dong, Na Li, Shuang Yun","doi":"10.1109/ICEET.2009.338","DOIUrl":"https://doi.org/10.1109/ICEET.2009.338","url":null,"abstract":"Taking the main pollution source of sewage river in north China as study object, concentrations of ammonia, chemical oxygen demand and heavy metals in sources of pollution and nearby water are determined. The two dimension steady river water quality models of ammonia and chemical oxygen demand are established, and the geometric characteristics of pollutant zone at downstream of the pollution source are obtained. Concentrations of total metals and metal fractions in sediment and soil samples are also determined. The relative enrichment factors are taken to study the pollution status of heavy metals in sediment and soil nearby the pollution source. The results show that the polllution level is more serious in sediment than that in soil. Zn, Cu and Cd are more enriched while Pb, Cr and Ni are less enriched. The potential harm caused by the mainly enriched metals is as follows: Cd ≫ Zn ≫ Cu.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86571785","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}
To overcome the low efficiency of phosphorus removal in the continuous influent biofilm, the continuous influent biofilm reactor (CIBFR) which based on intermittent aeration, rich phosphorus wastewater return and commutative influent was proposed in this study. The effects of dissolved oxygen(DO), volume loading (Nv) and the intermittent aeration on phosphorus removal of the CIBFR were investigated when the intermittent aeration was anaerobic 3h-aeration 6h, the temperature=20¿, DO=5.5 mg•L-1. When the influent COD was 280 mg•L-1 and influent PO43--P was 3.1 mg•L-1, the removal rates of COD and PO43--P were 72.9% and 78.5%.
{"title":"Study on Phosphorus Removal Efficiency of a Continuous Influent Biofilm Reactor (CIBFR) Based on Intermittent Aeration and Rich Phosphorus Wastewater Return","authors":"Zhou Jian, Zhou Jiong, Li Jing, D. Yan, Xiao Long","doi":"10.1109/ICEET.2009.603","DOIUrl":"https://doi.org/10.1109/ICEET.2009.603","url":null,"abstract":"To overcome the low efficiency of phosphorus removal in the continuous influent biofilm, the continuous influent biofilm reactor (CIBFR) which based on intermittent aeration, rich phosphorus wastewater return and commutative influent was proposed in this study. The effects of dissolved oxygen(DO), volume loading (Nv) and the intermittent aeration on phosphorus removal of the CIBFR were investigated when the intermittent aeration was anaerobic 3h-aeration 6h, the temperature=20¿, DO=5.5 mg•L-1. When the influent COD was 280 mg•L-1 and influent PO43--P was 3.1 mg•L-1, the removal rates of COD and PO43--P were 72.9% and 78.5%.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83943795","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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