Pub Date : 2018-03-01DOI: 10.1109/ICGEA.2018.8356272
T. P. Handayani, R. Budiarto, S. A. Hulukati, R. F. Gusa
Urban water tank pumping systems generally runs on grid electricity. However, in an event of power failure, such systems will be unable to function. This research developed a hybrid solar power water tank pumping system prototype, which can utilize electricity provided both by electricity grid and solar photovoltaic. The novelty of this prototype is that it automatically switches from grid electricity to the solar system during a power failure. Accordingly it is able to automatically fills when the water tank is empty and stops when the water tank is full using the mechanic sensors being able to detect the water level. Its component used includes a photovoltaic, an upper and a bottom limit switch, a 660 Watts inverter, a control panel, a battery and a solar charge controller. The testing of the prototype showed that the switching from grid electricity to solar power took 30 seconds.
{"title":"Development of a Hybrid Power Supply Control Prototype for Solar-Powered Water Tank Pumping System","authors":"T. P. Handayani, R. Budiarto, S. A. Hulukati, R. F. Gusa","doi":"10.1109/ICGEA.2018.8356272","DOIUrl":"https://doi.org/10.1109/ICGEA.2018.8356272","url":null,"abstract":"Urban water tank pumping systems generally runs on grid electricity. However, in an event of power failure, such systems will be unable to function. This research developed a hybrid solar power water tank pumping system prototype, which can utilize electricity provided both by electricity grid and solar photovoltaic. The novelty of this prototype is that it automatically switches from grid electricity to the solar system during a power failure. Accordingly it is able to automatically fills when the water tank is empty and stops when the water tank is full using the mechanic sensors being able to detect the water level. Its component used includes a photovoltaic, an upper and a bottom limit switch, a 660 Watts inverter, a control panel, a battery and a solar charge controller. The testing of the prototype showed that the switching from grid electricity to solar power took 30 seconds.","PeriodicalId":6536,"journal":{"name":"2018 2nd International Conference on Green Energy and Applications (ICGEA)","volume":"1 1","pages":"88-92"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90212647","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 : 2018-03-01DOI: 10.1109/ICGEA.2018.8356285
Anun Seemen, D. Atong, V. Sricharoenchaikul
Bed agglomeration is one operational challenge during fluidized bed gasification when rice straw is used as raw materials. Rice straw contains high potassium and other components which may lower ash melting point causing bed agglomeration. This study focused on the effect of alumina and silica ratio of bed materials in fluidized bed gasifier. The ratio of alumina bed was 0, 0.25, 0.50, 0.75 and 1.0. The experiments were performed at 700, 800 and 900°C with equivalence ratio (ER) of 0.2. Rice straw size 425–850 μm was used as raw materials. The result showed that the high ratio of alumina deceased bed agglomeration at 700°C. However, similar alumina ratio increased bed agglomeration at 800 and 900°C. In addition, the effect of temperature on defluidization time was significant. As the operating temperature increased, the defluidization time decreased. Although the ratio of the bed material was different but the result of defluidization time show a similar trend. As a result, high operating temperature may not suitable for fluidized bed gasification with this particular biomass. The SEM/EDS analyzed showed that potassium, calcium and silicate are major element in a linkage between bed particles. As a result, 75% of alumina bed ratio at 700°C was sufficient to avoid bed agglomeration during fluidized bed gasification of rice straw. In conclusion, specific ratio of alumina and silica can prevent agglomeration in fluidized bed gasification of rice straw when operating temperature lower than apparent eutectic melting point of involved alkalis from rice straw. The result from this investigation may lead to options on mitigating the problem of bed agglomeration in fluidized bed gasifier of rice straw.
{"title":"Effect of Silica and Alumina Ratio on Bed Agglomeration During Fluidized Bed Gasification of Rice Straw","authors":"Anun Seemen, D. Atong, V. Sricharoenchaikul","doi":"10.1109/ICGEA.2018.8356285","DOIUrl":"https://doi.org/10.1109/ICGEA.2018.8356285","url":null,"abstract":"Bed agglomeration is one operational challenge during fluidized bed gasification when rice straw is used as raw materials. Rice straw contains high potassium and other components which may lower ash melting point causing bed agglomeration. This study focused on the effect of alumina and silica ratio of bed materials in fluidized bed gasifier. The ratio of alumina bed was 0, 0.25, 0.50, 0.75 and 1.0. The experiments were performed at 700, 800 and 900°C with equivalence ratio (ER) of 0.2. Rice straw size 425–850 μm was used as raw materials. The result showed that the high ratio of alumina deceased bed agglomeration at 700°C. However, similar alumina ratio increased bed agglomeration at 800 and 900°C. In addition, the effect of temperature on defluidization time was significant. As the operating temperature increased, the defluidization time decreased. Although the ratio of the bed material was different but the result of defluidization time show a similar trend. As a result, high operating temperature may not suitable for fluidized bed gasification with this particular biomass. The SEM/EDS analyzed showed that potassium, calcium and silicate are major element in a linkage between bed particles. As a result, 75% of alumina bed ratio at 700°C was sufficient to avoid bed agglomeration during fluidized bed gasification of rice straw. In conclusion, specific ratio of alumina and silica can prevent agglomeration in fluidized bed gasification of rice straw when operating temperature lower than apparent eutectic melting point of involved alkalis from rice straw. The result from this investigation may lead to options on mitigating the problem of bed agglomeration in fluidized bed gasifier of rice straw.","PeriodicalId":6536,"journal":{"name":"2018 2nd International Conference on Green Energy and Applications (ICGEA)","volume":"51 1","pages":"268-272"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80728806","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 : 2018-03-01DOI: 10.1109/ICGEA.2018.8356266
Wen Xian-kui, Zhang Shi-hai, Wu Peng, Wu Mi
With the advantages of large storage capacity, long storage cycle and little pollution to the environment, compressed air energy storage is considered to be one of the most promising technologies for large-scale power storage. The great intermittency and volatility of photovoltaic and wind power will cause a large disturbance to the frequency of power grid. It is necessary to study how to use energy storage technology to maintain the frequency stability. According to the national standard, and referencing the same type of generation unit, the primary frequency modulation function of compressed air energy storage is constructed. Combined with its own characteristics, the parameters such as dead band, speed governor droop and limit bound are analyzed and set up, which lays the foundation for compressed air energy storage to participate in primary frequency regulation of power grid.
{"title":"Study on Primary Frequency Modulation Parameter Setting of Compressed Air Energy Storage","authors":"Wen Xian-kui, Zhang Shi-hai, Wu Peng, Wu Mi","doi":"10.1109/ICGEA.2018.8356266","DOIUrl":"https://doi.org/10.1109/ICGEA.2018.8356266","url":null,"abstract":"With the advantages of large storage capacity, long storage cycle and little pollution to the environment, compressed air energy storage is considered to be one of the most promising technologies for large-scale power storage. The great intermittency and volatility of photovoltaic and wind power will cause a large disturbance to the frequency of power grid. It is necessary to study how to use energy storage technology to maintain the frequency stability. According to the national standard, and referencing the same type of generation unit, the primary frequency modulation function of compressed air energy storage is constructed. Combined with its own characteristics, the parameters such as dead band, speed governor droop and limit bound are analyzed and set up, which lays the foundation for compressed air energy storage to participate in primary frequency regulation of power grid.","PeriodicalId":6536,"journal":{"name":"2018 2nd International Conference on Green Energy and Applications (ICGEA)","volume":"186 1","pages":"143-146"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75568417","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 : 2018-03-01DOI: 10.1109/ICGEA.2018.8356282
S. Balguvhar, S. Bhalla
Piezoelectric energy harvesting from bridge vibrations has attracted many researchers not because it provides a clean and autonomous solution to power portable electronic devices, in addition, it helps in making a smart city. This paper focuses on energy harvesting from low-frequency bridge vibrations which includes vibrations measurements from a city flyover and laboratory experiment using traditional rectifier circuit at low frequency and small amplitude vibrations for storage. The typical practical issues have been addressed associated with PEH from bridge vibrations and electrical circuitry.
{"title":"Green Energy Harvesting Using Piezoelectric Materials from Bridge Vibrations","authors":"S. Balguvhar, S. Bhalla","doi":"10.1109/ICGEA.2018.8356282","DOIUrl":"https://doi.org/10.1109/ICGEA.2018.8356282","url":null,"abstract":"Piezoelectric energy harvesting from bridge vibrations has attracted many researchers not because it provides a clean and autonomous solution to power portable electronic devices, in addition, it helps in making a smart city. This paper focuses on energy harvesting from low-frequency bridge vibrations which includes vibrations measurements from a city flyover and laboratory experiment using traditional rectifier circuit at low frequency and small amplitude vibrations for storage. The typical practical issues have been addressed associated with PEH from bridge vibrations and electrical circuitry.","PeriodicalId":6536,"journal":{"name":"2018 2nd International Conference on Green Energy and Applications (ICGEA)","volume":"12 1","pages":"134-137"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74923270","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 : 2018-03-01DOI: 10.1109/ICGEA.2018.8356283
Rima Kurnia Putri, Yulita Dyah Retno Widhi Astuti, Arum Kusuma Wardhany, C. Hudaya
Building sector is one of the biggest energy consumption along with residential, transportations and industrials. Building Integrated Photovoltaic (BIPV) can be an alternative to reduce energy consumption in the building and to secure the energy reserves. This study investigates the application of BIPV on the rooftop and facade of a high-rise building in Jakarta. Here, both technical and economic feasibility study are outlined. We employed the Sunny Web Design software and econometric spreadsheet program to calculate the energy generation and required specifications. BIPV rooftop produces greater energy yield compared to BIPV facade. This is because more radiation can be captured by BIPV rooftop on optimum azimuth and tilt angle. The BIPV reduce 5.97% of energy consumption. From the economic side, the total project cost and revenue of BIPV application is, respectively, 11.4 million USD and 1.2 million USD. This study can be broadened to develop BIPV in Indonesia.
{"title":"Building Integrated Photovoltaic for Rooftop and Facade Application in Indonesia","authors":"Rima Kurnia Putri, Yulita Dyah Retno Widhi Astuti, Arum Kusuma Wardhany, C. Hudaya","doi":"10.1109/ICGEA.2018.8356283","DOIUrl":"https://doi.org/10.1109/ICGEA.2018.8356283","url":null,"abstract":"Building sector is one of the biggest energy consumption along with residential, transportations and industrials. Building Integrated Photovoltaic (BIPV) can be an alternative to reduce energy consumption in the building and to secure the energy reserves. This study investigates the application of BIPV on the rooftop and facade of a high-rise building in Jakarta. Here, both technical and economic feasibility study are outlined. We employed the Sunny Web Design software and econometric spreadsheet program to calculate the energy generation and required specifications. BIPV rooftop produces greater energy yield compared to BIPV facade. This is because more radiation can be captured by BIPV rooftop on optimum azimuth and tilt angle. The BIPV reduce 5.97% of energy consumption. From the economic side, the total project cost and revenue of BIPV application is, respectively, 11.4 million USD and 1.2 million USD. This study can be broadened to develop BIPV in Indonesia.","PeriodicalId":6536,"journal":{"name":"2018 2nd International Conference on Green Energy and Applications (ICGEA)","volume":"50 1","pages":"171-175"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78260416","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 : 2018-03-01DOI: 10.1109/ICGEA.2018.8356298
N. Park, Weonjae Kim, Jinhong Jung
The on-line monitoring system for ultrapure water (UPW) systems was investigated. For the quality control of production water and the screening of defective water during the production of semiconductors and displays, as well as the operation of plant turbines, ultrapure water is managed through on-line and off-line monitoring of its conductivity and resistivity as well as its silicate, heavy metal, total organic carbon (TOC) and particle content. The American Society for Testing and Materials (ASTM) has developed and proposed seven types of electronics-grade water for the production of electronics and semiconductors. Type E-1.3 is classified as microelectronic water to be used in the production of devices having line widths between 0.065 and 0.032μm. This type is a water of ultimate practical purity produced in large volumes, and is intended for the most critical microelectronic uses. ASTM Type E-1.3 is also identical to the SEMI (Semiconductor Equipment and Materials International) Guide for Ultrapure Water Used in Semiconductor Processing (F063), 2010 version. The monitoring system of this study was operated in a pilot-scale ultrapure water plant having facilities with a production capacity of 50 m3/d. The results of system operations yielded water having an average TOC of 0.002 μg/L (Min. 0.001 μg/L, Max. 0.005 μg/L), an average particle content of 0.4 ea/L (> 0.05 μm, Min. 0.3 ea/L, Max. 0.8 ea/L), and a resistivity of 18.15 MΩ•cm. The results above indicated that the water quality standards provided in the Type E-1.2 specifications proposed by ASTM were satisfied.
{"title":"Pilot-Scale Application of on-Line Monitoring System for Ultrapure Water","authors":"N. Park, Weonjae Kim, Jinhong Jung","doi":"10.1109/ICGEA.2018.8356298","DOIUrl":"https://doi.org/10.1109/ICGEA.2018.8356298","url":null,"abstract":"The on-line monitoring system for ultrapure water (UPW) systems was investigated. For the quality control of production water and the screening of defective water during the production of semiconductors and displays, as well as the operation of plant turbines, ultrapure water is managed through on-line and off-line monitoring of its conductivity and resistivity as well as its silicate, heavy metal, total organic carbon (TOC) and particle content. The American Society for Testing and Materials (ASTM) has developed and proposed seven types of electronics-grade water for the production of electronics and semiconductors. Type E-1.3 is classified as microelectronic water to be used in the production of devices having line widths between 0.065 and 0.032μm. This type is a water of ultimate practical purity produced in large volumes, and is intended for the most critical microelectronic uses. ASTM Type E-1.3 is also identical to the SEMI (Semiconductor Equipment and Materials International) Guide for Ultrapure Water Used in Semiconductor Processing (F063), 2010 version. The monitoring system of this study was operated in a pilot-scale ultrapure water plant having facilities with a production capacity of 50 m3/d. The results of system operations yielded water having an average TOC of 0.002 μg/L (Min. 0.001 μg/L, Max. 0.005 μg/L), an average particle content of 0.4 ea/L (> 0.05 μm, Min. 0.3 ea/L, Max. 0.8 ea/L), and a resistivity of 18.15 MΩ•cm. The results above indicated that the water quality standards provided in the Type E-1.2 specifications proposed by ASTM were satisfied.","PeriodicalId":6536,"journal":{"name":"2018 2nd International Conference on Green Energy and Applications (ICGEA)","volume":"1 1","pages":"51-54"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88551826","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 : 2018-03-01DOI: 10.1109/ICGEA.2018.8356291
Yunjing Jiao, Wenjuan Xu, Huiming Zhang
In this paper, through numerical calculation and experiment, the cam phase was redesigned and the influence of cam phase on engine performance and emissions has been studied. At first, several cam phases were designed basing on original CNG(Compressed Natural Gas) engine using numerical software and two optimizations about valve phase were selected. Then the test bench of engine was made with different cam including optimized cams and the original one. By comparing the test experiment, it is found that the optimization No.3 whose valve overlap is 11° CA is the best one which considers both the power and the consumption of CNG besides reducing the exhaust gas.
{"title":"Influence of Cam Profile on CNG Engine Performance and Emissions","authors":"Yunjing Jiao, Wenjuan Xu, Huiming Zhang","doi":"10.1109/ICGEA.2018.8356291","DOIUrl":"https://doi.org/10.1109/ICGEA.2018.8356291","url":null,"abstract":"In this paper, through numerical calculation and experiment, the cam phase was redesigned and the influence of cam phase on engine performance and emissions has been studied. At first, several cam phases were designed basing on original CNG(Compressed Natural Gas) engine using numerical software and two optimizations about valve phase were selected. Then the test bench of engine was made with different cam including optimized cams and the original one. By comparing the test experiment, it is found that the optimization No.3 whose valve overlap is 11° CA is the best one which considers both the power and the consumption of CNG besides reducing the exhaust gas.","PeriodicalId":6536,"journal":{"name":"2018 2nd International Conference on Green Energy and Applications (ICGEA)","volume":"81 1","pages":"245-249"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90578195","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 : 2018-03-01DOI: 10.1109/ICGEA.2018.8356288
B. B. Kanbur, S. Dubey, Xiang Liming, Choo Hoong, F. Duan
Liquefied natural gas (LNG) cold utilization systems are feasible options for the inland and stranded regions where the conventional pipeline technology is challenging. For the best operation conditions of the systems in the real engineering applications, the optimization is a significant step after the design and analysis steps. This study aims to optimize an LNG cold utilized micro-cogeneration system by using the multiobjective optimization strategy with the genetic algorithm. Thermodynamic and thermoeconomic investigations are performed, and then the multiobjective optimization study is carried out according to the net generated power rate, exergetic efficiency, and the levelized product cost as multiobjectives. The study is conducted between 288.15 K and 313.15 K, and the optimum operation conditions are detected between 301.0 K and 302.5 K with respect to the different relative humidities.
对于传统管道技术面临挑战的内陆和搁浅地区来说，液化天然气(LNG)冷利用系统是可行的选择。为了使系统在实际工程应用中达到最佳运行状态，优化是设计和分析之后的重要步骤。本研究采用遗传算法的多目标优化策略，对LNG冷利用微热电联产系统进行优化。在此基础上，以净发电率、用能效率和平准化产品成本为多目标进行了多目标优化研究。在288.15 K ~ 313.15 K范围内进行研究，在301.0 K ~ 302.5 K范围内对不同相对湿度下的最佳操作条件进行了检测。
{"title":"Multiobjective Thermoeconomic Optimization of the LNG Cold Utilized Micro-Cogeneration System","authors":"B. B. Kanbur, S. Dubey, Xiang Liming, Choo Hoong, F. Duan","doi":"10.1109/ICGEA.2018.8356288","DOIUrl":"https://doi.org/10.1109/ICGEA.2018.8356288","url":null,"abstract":"Liquefied natural gas (LNG) cold utilization systems are feasible options for the inland and stranded regions where the conventional pipeline technology is challenging. For the best operation conditions of the systems in the real engineering applications, the optimization is a significant step after the design and analysis steps. This study aims to optimize an LNG cold utilized micro-cogeneration system by using the multiobjective optimization strategy with the genetic algorithm. Thermodynamic and thermoeconomic investigations are performed, and then the multiobjective optimization study is carried out according to the net generated power rate, exergetic efficiency, and the levelized product cost as multiobjectives. The study is conducted between 288.15 K and 313.15 K, and the optimum operation conditions are detected between 301.0 K and 302.5 K with respect to the different relative humidities.","PeriodicalId":6536,"journal":{"name":"2018 2nd International Conference on Green Energy and Applications (ICGEA)","volume":"1 1","pages":"215-219"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90989099","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 : 2018-03-01DOI: 10.1109/ICGEA.2018.8356310
S. Bindu, K. Reby Roy, S. S. Kumar
To optimize the cryogenic chilldown of transfer lines and to improve the efficiency of the cryogenic systems, chilldown time should be reduced. Shortening the chill down time is related to saving in consumption of cryogenic fluid and hence energy saving. Experiments were performed on copper test section with low conductivity coating for different inlet pressures. The performance of the regular copper tubes and one with coating at corresponding pressures were compared. The results indicated that there is substantial savings in chilldown time with coated surfaces compared to the noncoated ones. Liquid nitrogen was used as the cryogen and it is passed through the test section made of copper. The significant reduction in chilldown time is observed only after the arrival of nucleate boiling region as depicted on the average surface temperature versus time graph. In the course of this study it was discovered that a large increase in heat flux could be attained by interposing an insulating coating between the boiling liquid and the surface across which the heat is to be transferred.
{"title":"Experimental Study on the Effect of Low Conductivity Coating on Cryogenic Transfer Lines","authors":"S. Bindu, K. Reby Roy, S. S. Kumar","doi":"10.1109/ICGEA.2018.8356310","DOIUrl":"https://doi.org/10.1109/ICGEA.2018.8356310","url":null,"abstract":"To optimize the cryogenic chilldown of transfer lines and to improve the efficiency of the cryogenic systems, chilldown time should be reduced. Shortening the chill down time is related to saving in consumption of cryogenic fluid and hence energy saving. Experiments were performed on copper test section with low conductivity coating for different inlet pressures. The performance of the regular copper tubes and one with coating at corresponding pressures were compared. The results indicated that there is substantial savings in chilldown time with coated surfaces compared to the noncoated ones. Liquid nitrogen was used as the cryogen and it is passed through the test section made of copper. The significant reduction in chilldown time is observed only after the arrival of nucleate boiling region as depicted on the average surface temperature versus time graph. In the course of this study it was discovered that a large increase in heat flux could be attained by interposing an insulating coating between the boiling liquid and the surface across which the heat is to be transferred.","PeriodicalId":6536,"journal":{"name":"2018 2nd International Conference on Green Energy and Applications (ICGEA)","volume":"35 1","pages":"225-228"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89934334","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}
Demand response (DR) with the aim of stabilizing power supply and the cost of electricity has garnered a considerable amount of research interest in recent years. It is expected to be particularly useful for small- and medium-sized office buildings, which are responsible for a large share of total electricity consumption. In this paper, we propose implementing DR for small- and medium-sized office buildings by using an energy-saving control decision method that employs explanatory variables from prediction equations.
{"title":"Method to Determine Control of Energy Saving by Using Explanatory Variables for Demand Response","authors":"Toshihiro Mega, Yoshinori Nakajima, Kazuhiro Komatsu, Akifumi Sakai, Masatada Kawatsu, N. Kushiro","doi":"10.1109/ICGEA.2018.8356278","DOIUrl":"https://doi.org/10.1109/ICGEA.2018.8356278","url":null,"abstract":"Demand response (DR) with the aim of stabilizing power supply and the cost of electricity has garnered a considerable amount of research interest in recent years. It is expected to be particularly useful for small- and medium-sized office buildings, which are responsible for a large share of total electricity consumption. In this paper, we propose implementing DR for small- and medium-sized office buildings by using an energy-saving control decision method that employs explanatory variables from prediction equations.","PeriodicalId":6536,"journal":{"name":"2018 2nd International Conference on Green Energy and Applications (ICGEA)","volume":"27 1","pages":"210-214"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88422107","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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