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A Study on the Development and Application of a Design Program for Centrifugal Turbo Fan 离心涡轮通风机设计程序的开发与应用研究
Power System Engineering Pub Date : 2016-12-31 DOI: 10.9726/kspse.2016.20.6.071
Kim Jang Kweon, Seok-Hyung Oh
{"title":"A Study on the Development and Application of a Design Program for Centrifugal Turbo Fan","authors":"Kim Jang Kweon, Seok-Hyung Oh","doi":"10.9726/kspse.2016.20.6.071","DOIUrl":"https://doi.org/10.9726/kspse.2016.20.6.071","url":null,"abstract":": This paper introduces the design method of the centrifugal turbo fan and the process of developing the design program of it. The developed design program confirmed the applicability by experimental performance data. Here, we proposed new velocity coefficients and considered various losses such as impeller inlet loss, vane passage flow loss, casing pressure loss, recirculation loss power, and disk friction loss power. Especially, the inlet and outlet widths of the impeller were newly determined by reflecting the experimental results. As a result, this fan design program shows a good performance result regardless of the types of impeller and is expected to be a very useful design tool.","PeriodicalId":360692,"journal":{"name":"Power System Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131381504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Study on the Energy Load of the Curtain Wall Buildings according to the Application of the Double-skin Facade System 基于双层幕墙系统应用的幕墙建筑能量负荷研究
Power System Engineering Pub Date : 2016-12-31 DOI: 10.9726/kspse.2016.20.6.099
Bai Li, Jun-Gi Lee, Sung-Hoon Kim, Gab-Taek Lee, Dong-Wan Kim, Kyung-Hee Lee
{"title":"A Study on the Energy Load of the Curtain Wall Buildings according to the Application of the Double-skin Facade System","authors":"Bai Li, Jun-Gi Lee, Sung-Hoon Kim, Gab-Taek Lee, Dong-Wan Kim, Kyung-Hee Lee","doi":"10.9726/kspse.2016.20.6.099","DOIUrl":"https://doi.org/10.9726/kspse.2016.20.6.099","url":null,"abstract":": In this study, we researched the energy load according to the change of the inner window area ratio, the distance of the air gap and the azimuth of the curtain wall building, which installed the multistory double-skin facade(DSF). and we compared the results with the no double-skin facade situation as follows. With the DSF, it is better than other case, when the window area ratio is 40% and the air gap is 1.2m on the west, south-45-west, south-45-east and east. And it’s best when the window area ratio is 40% and the air gap is 0.4m on the south. And on the east or south-45-east, the window area ratio is 40% and the air gap is 1.2m is better than other case with the DSF. On south, it is best when the window area ratio is 100% without DSF. On the south-45-west or west, it is best when the window area ratio is 40% without the DSF.","PeriodicalId":360692,"journal":{"name":"Power System Engineering","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117171047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Nitrogen Gas Pressure on the Mechanical Properties of Polymer Composite Materials 氮气压力对高分子复合材料力学性能的影响
Power System Engineering Pub Date : 2016-10-31 DOI: 10.9726/KSPSE.2016.20.5.014
Bu-An Kim, Hyundo Hwang, Suk-Jun Kang, C. Moon
{"title":"Effect of Nitrogen Gas Pressure on the Mechanical Properties of Polymer Composite Materials","authors":"Bu-An Kim, Hyundo Hwang, Suk-Jun Kang, C. Moon","doi":"10.9726/KSPSE.2016.20.5.014","DOIUrl":"https://doi.org/10.9726/KSPSE.2016.20.5.014","url":null,"abstract":": This study is about the effect of nitrogen gas pressures during manufacturing process on the mechanical properties of composite materials. TiO 2 /epoxy resin nanocomposites and carbon fiber reinforced epoxy resin(CFRP) composites were fabricated under various nitrogen gas pressures. Tensile strength test, vicker’s hardness test and fracture surface observation were carried out to investigate the effect of nitrogen gas pressure. As a result, the tensile strength of nanocomposite and CFRP composites showed clearly increasing tendency by a change in the nitrogen gas pressure up to 3.0 atm and then the tensile strength decreased a little. However, the vicker’s hardness of TiO 2 /epoxy nanocomposites showed same hardness values regardless of the nitrogen gas pressures.","PeriodicalId":360692,"journal":{"name":"Power System Engineering","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124501357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Study on the Noise and Condensation Characteristics of Complex Structure Drainage Pipe Materials 复杂结构排水管材料的噪声与凝结特性研究
Power System Engineering Pub Date : 2016-10-31 DOI: 10.9726/KSPSE.2016.20.5.072
Jae Dol Kim
{"title":"A Study on the Noise and Condensation Characteristics of Complex Structure Drainage Pipe Materials","authors":"Jae Dol Kim","doi":"10.9726/KSPSE.2016.20.5.072","DOIUrl":"https://doi.org/10.9726/KSPSE.2016.20.5.072","url":null,"abstract":": The present study investigates noise and condensation characteristics of polyvinyl chloride (PVC), which is widely used for drainage piping materials, complex double structure by comparing to those of PVC single structure piping materials. In addition, effects of insulation on drainage noise has been measured experimentally. As the results of the experiments, noise reduction effect of PVC complex double structure is superior to that of PVC single structure in terms of elbow and vertical piping materials which are employed for drainage pipes of toilet bowls and bathtub. The insulation barely have effect on the noise reduction in case of the PVC single structure since there is almost no changes in noise occurrence even though the insulation is applied on both elbow and vertical piping materials. Temperature differences between inside and outside of the pipes have been measures for the PVC single and complex double structures as well. In consequence, outside temperature of the PVC complex double structure is higher than that of the PVC single structure. The condensation occurrence time of the PVC complex double structure shows a distinct difference from that of the PVC single structure, thus, the PVC complex double structure has outstanding effect on preventing the condensation.","PeriodicalId":360692,"journal":{"name":"Power System Engineering","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127573803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
NOx Emission Characteristic according to Aging of EGR Cooler in Non-Road Diesel Engine 基于老化的非道路柴油机EGR冷却器NOx排放特性研究
Power System Engineering Pub Date : 2016-10-31 DOI: 10.9726/KSPSE.2016.20.5.037
Kyoung-Bok Lee, K. Oh
{"title":"NOx Emission Characteristic according to Aging of EGR Cooler in Non-Road Diesel Engine","authors":"Kyoung-Bok Lee, K. Oh","doi":"10.9726/KSPSE.2016.20.5.037","DOIUrl":"https://doi.org/10.9726/KSPSE.2016.20.5.037","url":null,"abstract":"Exhaust gas recirculation has the advantage of being low-cost and easy to control of NOx emission. Therefore, it is most generally used to reduce NOx emission according to strengthen regulation. In the case of a non-road engine, such as the agricultural engine, since it mainly operate a middle or high-load state, NOx emission is decreased in accordance with the mapping range of the EGR rate, but results in an increase in the particulate matter which is caused to deposit and fouling problem of the EGR system. This problem has become an important issue for maintaining the performance of the engine, as well as emission performance. This study had examined the effects of cooler aging on the performance of heat transfer efficiency and NOx emission in non-road diesel engine. As a result of the EGR cooler aging during 200 hours engine operation, the cooling performance decreased about 25% compared with that of fresh cooler and the NOx emission increased about 14.6% on NRSC(non-road steady cycle) and 20% on NRTC(non-road transient cycle) compared with that of fresh cooler respectively.","PeriodicalId":360692,"journal":{"name":"Power System Engineering","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128244745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A study on the Thermal Deformation of Line Heated TMCP and Normalizing Steel 线加热TMCP和正火钢的热变形研究
Power System Engineering Pub Date : 2016-10-31 DOI: 10.9726/KSPSE.2016.20.5.046
Jeong-Tae Kim, Kwang-sung Lee, Hyomin Jeong, H. Chung
{"title":"A study on the Thermal Deformation of Line Heated TMCP and Normalizing Steel","authors":"Jeong-Tae Kim, Kwang-sung Lee, Hyomin Jeong, H. Chung","doi":"10.9726/KSPSE.2016.20.5.046","DOIUrl":"https://doi.org/10.9726/KSPSE.2016.20.5.046","url":null,"abstract":": The TMCP steel has expanded in the marine structure during manufacturing process because of its excellent weld-ability and impact toughness. In the case of merchant ships, coverage of TMCP steel has been used widely on over DH36 Classifications material. The line heating process is applied to the outer surface of the steel plate for the shipbuilding. In this study, We compared between TMCP and normalizing steel for shipbuilding by analyzing some basic data through performing the natural cooling after the line heating. The experimental results show the angular misalignment changes in line heating. Heated surface of normalizing steel material expanded to ‑ 0.3° and reduced to +0.2° after cooling. And during cooling at 194 ℃ for 1,500 seconds, Angular Misalignment began from - direction to + direction, passed the critical point to the default at 2,200 seconds and did not take place any more at 103 ℃ after the 2,700 seconds. Angular Misalignment results of TMCP steels and Normalizing steel material show same angular misalignment lasted 1,200 seconds, TMCP steel has given more expansion and contraction angle which is 0.2° than that of the Normalizing steel. Length difference between expansion and contraction is about 0.3 mm.","PeriodicalId":360692,"journal":{"name":"Power System Engineering","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127189633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Performance Characteristics of Refrigerant R170(Ethane) Refrigeration System Using Liquid-gas Heat Exchanger 采用液气换热器的制冷剂R170(乙烷)制冷系统的性能特性
Power System Engineering Pub Date : 2016-10-31 DOI: 10.9726/KSPSE.2016.20.5.078
H. Ku
{"title":"Performance Characteristics of Refrigerant R170(Ethane) Refrigeration System Using Liquid-gas Heat Exchanger","authors":"H. Ku","doi":"10.9726/KSPSE.2016.20.5.078","DOIUrl":"https://doi.org/10.9726/KSPSE.2016.20.5.078","url":null,"abstract":"","PeriodicalId":360692,"journal":{"name":"Power System Engineering","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133892976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Study on Bloating of Porous Foam by Pressure Infiltration with H 2 O 2 h2o2压力渗透多孔泡沫膨胀的研究
Power System Engineering Pub Date : 2016-10-31 DOI: 10.9726/KSPSE.2016.20.5.086
Gui-Shik Kim, Ji-Hyun Jeong
{"title":"A Study on Bloating of Porous Foam by Pressure Infiltration with H 2 O 2","authors":"Gui-Shik Kim, Ji-Hyun Jeong","doi":"10.9726/KSPSE.2016.20.5.086","DOIUrl":"https://doi.org/10.9726/KSPSE.2016.20.5.086","url":null,"abstract":"","PeriodicalId":360692,"journal":{"name":"Power System Engineering","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122928543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of the Environmental Qualification for Non-metallic Parts 非金属零件环境质量评定
Power System Engineering Pub Date : 2016-10-31 DOI: 10.9726/kspse.2016.20.5.052
Keug-Jin Bhang, Jun-Hee Hong
{"title":"Evaluation of the Environmental Qualification for Non-metallic Parts","authors":"Keug-Jin Bhang, Jun-Hee Hong","doi":"10.9726/kspse.2016.20.5.052","DOIUrl":"https://doi.org/10.9726/kspse.2016.20.5.052","url":null,"abstract":"Environmental Qualification has been almost developed except those of Non-M aterial Sub-com ponents for valves and pumps though the time has only passed about 10years since EQ test launch of Korea. However EQ test has been performed by a few of engineers under the conditions that experience of EQ test is insufficient and EQ system is not developed completely. In recent years, Strengthen Nuclear Safety Regulation is being done Strictly Nuclear safety components Verification Procedure for Non-M aterial Sub-com ponents, but the reports contain only performance test results, not E nv iro nm en ta l test methods relating to real Aging Degradation. In this Study, there were developed to performance systematically research to acquire EQ technology for five specim ens of the Non-M aterial Sub-com ponents in the Nuclear Power Plant.","PeriodicalId":360692,"journal":{"name":"Power System Engineering","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114487601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fuel Consumption Effect by Mass Reduction of Low Speed Transmission Gears in Commercial Vehicles 商用车低速传动齿轮减重对油耗的影响
Power System Engineering Pub Date : 2016-10-31 DOI: 10.9726/KSPSE.2016.20.5.060
S. Han, Y. Shin, Jong-Gyu Jeong, C. Song
{"title":"Fuel Consumption Effect by Mass Reduction of Low Speed Transmission Gears in Commercial Vehicles","authors":"S. Han, Y. Shin, Jong-Gyu Jeong, C. Song","doi":"10.9726/KSPSE.2016.20.5.060","DOIUrl":"https://doi.org/10.9726/KSPSE.2016.20.5.060","url":null,"abstract":": Dynamic performance of transmission has a substantial effect on dynamic performance and fuel efficiency of a vehicles. Dynamic performance of transmission and mass moments of inertia of transmission gears are related directly each other. Then a smaller amount of kinetic energy from vehicles that repeat acceleration and deceleration requires lighter rotating part in transmission. It is going to increases fuel efficiency as a result. In this study, equivalent inertia moments of inertia at different speeds were calculated by simplifying the transmission system. To find out lightening effect at low speed level gear on fuel efficiency, the powerflow of transmission was analyzed. And the lightning effect of the rotating parts in transmission is compared with the mass reduction of sprung parts in vehicle.","PeriodicalId":360692,"journal":{"name":"Power System Engineering","volume":"222 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124411987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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