연구성과로 돌아가기
2022 연구성과 (198 / 280)
※ 컨트롤 + 클릭으로 열별 다중 정렬 가능합니다.
Excel 다운로드
| WoS | SCOPUS | Document Type | Document Title | Abstract | Authors | Affiliation | ResearcherID (WoS) | AuthorsID (SCOPUS) | Author Email(s) | Journal Name | JCR Abbreviation | ISSN | eISSN | Volume | Issue | WoS Edition | WoS Category | JCR Year | IF | JCR (%) | FWCI | FWCI Update Date | WoS Citation | SCOPUS Citation | Keywords (WoS) | KeywordsPlus (WoS) | Keywords (SCOPUS) | KeywordsPlus (SCOPUS) | Language | Publication Stage | Publication Year | Publication Date | DOI | JCR Link | DOI Link | WOS Link | SCOPUS Link |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ○ | ○ | Article | Life Evaluation of Battery Energy System for Frequency Regulation Using Wear Density Function | Frequency regulation (FR) using a battery energy storage system (BESS) has been expanding because of the growth of renewable energy. This study introduces the wear density function, which considers battery degradation factors such as the rate of current, temperature, and depth of discharge (DOD) to provide a precise lifespan prediction. Furthermore, an equivalent system model is developed to evaluate the FR performance of the BESS for various operating parameters. Finally, a quantitative tradeoff relationship between performance and battery lifecycle is derived from the analysis using operational data of the actual BESS for FR. | Park, Jingyeong; Choi, Jeonghyeon; Jo, Hyeondeok; Kodaira, Daisuke; Han, Sekyung; Acquah, Moses Amoasi | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; Univ Tsukuba, Dept Elect Engn Energy & Environm, Tsukuba, Ibaraki 3058577, Japan; Kyungpook Natl Univ, Dept Elect Engn, Daegu 41566, South Korea; Keimyung Univ, Dept Elect Energy Engn, 1095 Dalgubeol Daero, Daegu 42601, South Korea | 57206479044; 57059597500; 57202953094; 56974393400; 36023785800; 57105816500 | amoasiacquah@gmail.com; | ENERGIES | ENERGIES | 1996-1073 | 15 | 21 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 0.24 | 2025-06-25 | 3 | 3 | battery management system; battery wear; energy storage system; frequency regulation; state of health | STATE-OF-CHARGE; AGING MECHANISMS; HEALTH; MODEL | battery management system; battery wear; energy storage system; frequency regulation; state of health | Battery management systems; Battery storage; Digital storage; Electric batteries; Function evaluation; Life cycle; Battery energy; Battery energy storage systems; Battery wear; Energy storage system; Energy systems; Frequency regulations; Life evaluation; Performance; State of health; Storage systems; Wear of materials | English | 2022 | 2022-11 | 10.3390/en15218071 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Optimisation of Induced Steam Residual Moisture Content in a Clothing Conditioner Based on a Genetic Algorithm | This paper presents the modelling of heat and moisture transfer in a clothes-conditioning unit with the aim of improving the moisture content distribution to the clothes. A multicomponent, non-reacting, two-phase Eulerian-Eulerian model was utilised to solve the computational model. The clothes inside the conditioning unit were modeled as retangular towels (porous medium) of uniform thickness. Mass flow distribution of air and steam through the clothes was studied by systematically varying the steam nozzle angle (30 degrees to 75 degrees) and air inflow grill angle (45 degrees to 105 degrees). The simulation results were studied to identify the impact of design parameters on the mass flow distribution inside the clothes-conditioning unit. The mass flow of steam and the air-steam mixture were calculated through each towel in the forward and reverse direction. Response surface analysis was conducted to correlate the total mass flow rate and steam mass flow rate through each towel with the design variables. Moreover, a multiobjective genetic algorithm was employed to optimise the mass flow through the clothes and ascertain the optimal design configuration. The geometric configuration with a steam nozzle angle of 45 degrees and air grill angle of 105 degrees resulted in optimal steam and mixture distribution. | Saleem, Arslan; Saeed, Muhammad; Kim, Man-Hoe | Kyungpook Natl Univ, Sch Mech Engn & IEDT, Daegu 41566, South Korea; Cardiff Univ, Sch Engn, Queens Bldg, Cardiff CF24 3AA, S Glam, Wales; Abu Dhabi Maritime Acad, POB 54477, Abu Dhabi, U Arab Emirates | Saleem, Arslan/ABA-5982-2021; Saeed, Muhammad/R-4401-2019 | 57194776354; 56513270400; 55686310000 | manhoe.kim@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 15 | 15 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 0 | 2025-06-25 | 0 | 0 | heat and mass transfer; thermal management; numerical analysis; genetic algorithm; clothes-conditioning unit | AIRBORNE WIND TURBINE; PHASE-CHANGE; MASS-TRANSFER; AERODYNAMIC PERFORMANCE; HEAT-TRANSFER; ASSEMBLIES; SORPTION; CONDENSATION; SIMULATION; SYSTEM | clothes-conditioning unit; genetic algorithm; heat and mass transfer; numerical analysis; thermal management | Heat transfer; Mass transfer; Mixtures; Moisture control; Nozzles; Porous materials; Steam; Surface analysis; Clothes-conditioning unit; Conditioning units; Flow distribution; Heat and mass transfer; Mass flow; Mass-flow rate; Nozzle angle; Optimisations; Residual moisture content; Steam nozzle; Genetic algorithms | English | 2022 | 2022-08 | 10.3390/en15155696 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Partial Y-Bus Factorization Algorithm for Power System Dynamic Equivalents | This paper presents a partial Y-bus factorization algorithm to reduce the size of a power system model for transient stability analysis. In the proposed approach, steady-state operating conditions for dynamic equivalents are maintained using the traditional Ward admittance method. Fictitious generators are attached at boundary buses to preserve transient behavior following a disturbance. The equivalent dynamic effects from eliminated generators can be maintained by choosing appropriate dynamic parameters of fictitious generators, including machine inertia, transient reactance, and the damping coefficient. Parameters are determined using the idea that the contributions from external generators mostly depend on the network configuration and impedance characterized by the Y-bus matrix. The fictitious generators' dynamic parameters are determined by conducting partial Y-bus factorization on dynamic parameter matrices. The proposed method's performance is validated by conducting case studies with the IEEE 118-bus system and a 10,000 synthetic western U.S. power grid model and comparing simulation outcomes between the full system and reduced equivalent models. Simulation comparisons show that the equivalent model maintains high accuracy. The proposed method is promising alternative solution for power system dynamic equivalents. | Kim, Soobae; Overbye, Thomas J. | Kyungpook Natl Univ, Sch Elect & Elect Engn, Dept Elect Engn, Daegu 41566, South Korea; Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA | 55377374400; 7004598724 | soobae.kim@knu.ac.kr;overbye@tamu.edu; | ENERGIES | ENERGIES | 1996-1073 | 15 | 3 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 0.08 | 2025-06-25 | 1 | 1 | dynamic equivalents; ward equivalents; partial Y-bus factorization; transient stability simulation; computational efficiency | Computational efficiency; Dynamic equivalents; Partial Y-bus factorization; Transient stability simulation; Ward equivalents | Buses; Computational efficiency; Electric power system stability; Electric power transmission networks; Matrix algebra; Transient analysis; Dynamic equivalent; Dynamic parameters; Equivalent modeling; Factorization algorithms; Partial Y-bus factorization; Power system dynamic equivalent; Power system modeling; Transient stability analysis; Transient stability simulation; Ward equivalent; Factorization | English | 2022 | 2022-02 | 10.3390/en15030682 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Performance Comparison and Analysis of the Curtain-Wall-Type Liquid-Type Photovoltaic Thermal Unit According to the Pipe Connection Method | Recently, there has been increasing attention on the use of renewable energy in buildings, particularly, the photovoltaic thermal (PVT) system that uses both solar power and thermal energy. However, there is a limit to adopting the PVT system in real buildings because many architects value the aesthetics of buildings or spaces. This study developed a curtain-wall-type liquid-type PVT (CW-PVT) that can be installed on a wall as it integrates with the building. To analyze the system performance, a real-scale experimental plant was established in an outdoor environment. The performance of the CW-PVT unit was verified for two different module pipe connection types: parallel and serial. Meteorological variable data, the inlet and outlet fluid temperatures, surface temperature, and electrical energy generation of the modules were measured and collected using the measurement equipment according to the module pipe connection type. Consequently, the parallel-type method was approximately 10% more efficient than the serial type in energy production, whereas the serial-type method produced water with a temperature approximately 47% higher than that of the parallel type. Notably, it was advantageous to apply the parallel-type connection to maximize the energy generation efficiency in buildings where the system efficiency is vital and the serial-type connection in buildings where the high temperature of hot water is required. | Kim, Yunho; Hwang, Jungha; Bae, Sangmu; Nam, Yujin | Kyungpook Natl Univ, Sch Architectural Civil Environm & Energy Engn, 80 Daehakro, Daegu 41566, South Korea; Pusan Natl Univ, Dept Architectural Engn, 2 Busandaehak Ro 63, Busan 46241, South Korea | 58943902900; 55710714500; 57203300086; 24449621900 | yh5966@knu.ac.kr;peter@knu.ac.kr;sangmu_bae@pusan.ac.kr;namyujin@pusan.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 15 | 7 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 0 | 2025-06-25 | 0 | 0 | curtain-wall-type liquid-type photovoltaic thermal system (CW-PVT); field study; pipe connection method; thermal performance; electrical performance | curtain-wall-type liquid-type photovoltaic thermal system (CW-PVT); electrical performance; field study; pipe connection method; thermal performance | Liquids; Solar energy; Solar power generation; Walls (structural partitions); Connection method; Curtain-wall-type liquid-type photovoltaic thermal system; Curtain-walls; Electrical performance; Field studies; Liquid types; Photovoltaic/thermal systems; Pipe connection method; Thermal Performance; Wall types; Pilot plants | English | 2022 | 2022-04 | 10.3390/en15072317 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Study of Induction Motor Inter-Turn Fault Part I: Development of Fault Models with Distorted Flux Representation | An inter-turn fault (ITF) is one of the most frequent induction motor faults; thus, many previous works have studied its model and diagnosis. However, previous works, simplifying the specific distorted flux distribution by the ITF, presented induction motor fault models and focused on the fault signal analysis for diagnoses. Consequently, these results are only adequate for the pretested motor and sensitive to fault signal distortion. This paper presents an induction motor ITF model in the stationary DQ frame, for a model-based diagnosis. Furthermore, to describe the distorted flux distribution along the air gap by the ITF, the rotor flux linkages are described in the independent DQ frame of every pole, and the mutual flux linkages among the rotor, stator, and ITF windings are specifically modeled. Hence, the proposed full model has many current states and mutual inductances to describe the high pole number motor. A simplified model is also proposed for easier usage in the diagnosis, with light ITF to overcome this complexity. Finally, simulation and experiments are performed to verify the presented induction motor ITF fault models. | Im, Seong-Hwan; Gu, Bon-Gwan | Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea | 57212462415; 50061273700 | imsh9698@naver.com;bggu@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 15 | 3 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 0.77 | 2025-06-25 | 10 | 11 | induction motor; inter-turn fault (ITF); fault model; negative sequence current; positive sequence current; fault parameter | THERMAL-DEGRADATION; SHORT CIRCUITS; STATOR FAULT; DIAGNOSIS; INSULATION; MACHINES; WIRE | Fault model; Fault parameter; Induction motor; Inter-turn fault (ITF); Negative sequence current; Positive sequence current | Fault detection; Flux linkage; Inductance; Poles; Fault model; Fault parameters; Flux distributions; Inductions motors; Inter-turn fault; Motor fault; Negative-sequence currents; Positive sequence current; Sequence current; Induction motors | English | 2022 | 2022-02 | 10.3390/en15030894 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Study of Induction Motor Inter-Turn Fault Part II: Online Model-Based Fault Diagnosis Method | This paper (Part II) is a follow-up paper to our previous work on developing induction motor inter-turn fault (ITF) models (Part I). In this paper, an online ITF diagnosis method of induction motors is proposed by utilizing the negative sequence current as a fault signal based on the fault model of the previous study in part I. The relationships among fault parameters, negative sequence current, and fault copper loss are analyzed with the ITF model. The analyses show that the fault severity index, a function of fault parameters, is directly related to the negative sequence and the copper loss. Therefore, the proposed model-based fault diagnosis method estimates the fault severity index from the negative sequence current and recognizes the ITF. With the estimated fault severity index, the fault copper loss by the ITF, causing thermal degradation, can be calculated. Finally, experiments were performed in various fault conditions to verify the proposed fault diagnosis method. | Im, Seong-Hwan; Gu, Bon-Gwan | Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea | 57212462415; 50061273700 | imsh9698@naver.com;bggu@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 15 | 3 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 1.61 | 2025-06-25 | 16 | 21 | inter-turn fault; ITF model; negative sequence; fault parameter; fault diagnosis | THERMAL-DEGRADATION; SHORT CIRCUITS; STATOR FAULT; MACHINES; INSULATION; WIRE | Fault diagnosis; Fault parameter; Inter-turn fault; ITF model; Negative sequence | Copper; Fault detection; Induction motors; Fault diagnosis method; Fault model; Fault parameters; Faults diagnosis; Inductions motors; Inter-turn fault; Inter-turn fault model; Negative sequence; Negative-sequence currents; Failure analysis | English | 2022 | 2022-02 | 10.3390/en15030977 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Study on Heating and Cooling Performance of Air-to-Water Heat Pump System for Protected Horticulture | There is much interest in alternative energy sources for greenhouse heating and cooling, due to the impact of severe climatic conditions and increasing fossil fuel prices. The main objective of this study was to experimentally evaluate the performance of an air-to-water heat pump (AWHP) system to fulfil the cooling and heating energy requirements of a three-spanned greenhouse under local weather conditions in Daegu, South Korea. For this purpose, a system comprising three air-to-water heat pumps, a water storage tank, and fan coil units (FCU)s was designed. Experiments were conducted extensively during the summer and winter seasons. The maximum heating and cooling energy supply to the greenhouse was 210 kcal center dot h(-1)center dot m(-2) and 230 kcal center dot h(-1)center dot m(-2), respectively. Based on the outcomes of this study, the AWHP system can provide heating during the winter season. During the summer season, the FCU capacity was insufficient to provide the desired cooling to achieve the setpoint air temperature inside the studied greenhouse. To achieve the desired microclimate during the summer season, the capacity of the FCU or number of FCUs must be increased. Moreover, one AWHP with a water storage tank, was sufficient to provide the required cooling and heating in both seasons. Two additional AWHPs can be used to provide energy to more greenhouse areas in the future. The results can be used as a case study to find a more resilient and reliable source for greenhouse heating and cooling. The average COP of the AWHP in heating mode was 2.2, while on cooling mode, it was 3.2. | Rasheed, Adnan; Lee, Jong Won; Kim, Hyeon Tae; Lee, Hyun Woo | Kyungpook Natl Univ, Smart Agr Innovat Ctr, Daegu 41566, South Korea; Korea Natl Univ Agr & Fisheries, Dept Hort Environm Syst, 1515 Kongjwipatjwi Ro, Jeonju Si 54874, South Korea; Gyeongsang Natl Univ, Dept Bioind Machinery Engn, Jinju 660701, South Korea; Kyungpook Natl Univ, Dept Agr Engn, Daegu 41566, South Korea | rasheed, adnan/Q-2203-2019 | 56080100700; 50062247400; 8662923200; 57209160180 | adnanrasheed@knu.ac.kr;leewon1@korea.kr;bioani@gnu.ac.kr;whlee@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 15 | 15 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 0.49 | 2025-06-25 | 3 | 6 | greenhouse energy; renewable energy; greenhouse microclimate; greenhouse heating and cooling | STORAGE | greenhouse energy; greenhouse heating and cooling; greenhouse microclimate; renewable energy | Fossil fuels; Heat pump systems; Heating; Pumps; Tanks (containers); Air-to-water heat pump; Fan coil unit; Greenhouse cooling; Greenhouse energy; Greenhouse heating; Greenhouse microclimate; Heat-pump systems; Heating and cooling; Renewable energies; Summer season; Greenhouses | English | 2022 | 2022-08 | 10.3390/en15155467 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Synchronizing Torque-Based Transient Stability Index of a Multimachine Interconnected Power System | Newly developed tools and techniques are continuously established to analyze and monitor power systems' transient stability limits. In this paper, a model-based transient stability index for each generator is proposed from the synchronizing torque contributions of all other connected generators in a multi-machine interconnected power system. It is a new interpretation of the generator's synchronizing torque coefficient (STC) in terms of electromechanical oscillation modes to consider the synchronizing torque interactions among generators. Thus, the system operator can continuously monitor the system's available secured transient stability limit in terms of synchronizing torque more accurately, which is helpful for planning and operation studies due to the modal based index. Furthermore, the popular transient stability indicator critical clearing time (CCT), and the traditionally determined synchronizing torque values without other generator contributions, are calculated to verify and compare the performance of the proposed transient stability index. The simulations and test result discussions are performed over a western system coordinating council (WSCC) 9-bus and an extensive New England 68-bus large power test system cases. The open-source power system analysis toolbox (PSAT) on the MATLAB/Simulink environment is used to develop, simulate, validate and compare the proposed transient stability index. | Poulose, Albert; Kim, Soobae | Kyungpook Natl Univ, Dept Elect Engn, Sch Elect & Elect Engn, Daegu 41566, South Korea | ; Poulose, Albert/HOF-5035-2023 | 57216694893; 55377374400 | albertpoulosepalatty@knu.ac.kr;soobae.kim@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 15 | 9 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 0.16 | 2025-06-25 | 2 | 2 | power system stability; transient stability analysis; model-based analysis; stability margin; synchronizing torque; synchronizing torque coefficient; power system dynamics; electromechanical oscillations; rotor angle stability | electromechanical oscillations; model-based analysis; power system dynamics; power system stability; rotor angle stability; stability margin; synchronizing torque; synchronizing torque coefficient; transient stability analysis | Circuit oscillations; Electric power system interconnection; Electric power system stability; MATLAB; Monitoring; Open systems; Torque; Transient analysis; Electromechanical oscilla-tions; Electromechanical oscillation; Model-based analysis; Power system dynamics; Power systems stability; Rotor angle stability; Stability margins; Synchronizing torque; Synchronizing torque coefficients; Transient stability analysis; Synchronization | English | 2022 | 2022-05 | 10.3390/en15093432 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Taxonomic and Biochemical Characterization of Microalga Graesiella emersonii GEGS21 for Its Potential to Become Feedstock for Biofuels and Bioproducts | Graesiella emersonii is a commercially exploitable source of bioactive compounds and biofuels with potential applications in microalgae-based industries. Despite this, little taxonomical information is available. Therefore, proper identification and characterization are needed for the sustainable utilization of isolated microalgae. In this study, an axenically isolated unicellular green alga from the Geumgang Estuary, Korea was investigated for its morphological, molecular, and biochemical characteristics. The morphological characteristics were typical of G. emersonii. Molecular phylogenetic analysis of the 18S rDNA sequence verified that the isolate belonged to G. emersonii and was subsequently named G. emersonii GEGS21. It was isolated from brackish water, and its optimal growth temperature, salinity, and light intensity were at 28-32 degrees C, 0 M NaCl, and 130-160 mu mol m(-2) s(-1), respectively. The strain thrived over a range of temperatures (5-40 degrees C) and withstood up to 0.5 M NaCl. The isolate was rich in omega-6 linoleic acid (C-18:2 n-6, 26.3%) and palmitic acid (C-16:0, 27.5%). The fuel quality properties were determined, and biodiesel from GEGS21 could be used as a biodiesel blend. Value-added carotenoids lutein (1.5 mg g(-1) dry cell weight, DCW) and neoxanthin (1.2 mg g(-1) DCW) were biosynthesized as accessory pigments by this microalga. The biomass of this microalga may serve as feedstock for biodiesel production as well as producing valuable omega-6 and carotenoids. | Kang, Nam Seon; Cho, Kichul; An, Sung Min; Kim, Eun Song; Ki, Hyunji; Lee, Chung Hyeon; Choi, Grace; Hong, Ji Won | Natl Marine Biodivers Inst Korea, Dept Microbial Resources, Seocheon 33662, South Korea; Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, Daegu 41566, South Korea; Kyungpook Natl Univ, Adv Bioresource Res Ctr, Daegu 41566, South Korea | ; An, Sung-Min/AAC-3888-2021; Cho, Kichul/IXD-8135-2023 | 7102653317; 55877400600; 56493979500; 57212380771; 57981461300; 58482939500; 57194561009; 57201579963 | jwhong@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 15 | 22 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 1.06 | 2025-06-25 | 11 | 14 | Graesiella emersonii; lutein; taxonomy; pigments; fatty acids; omega-6; biofuels; microalgae | POLYUNSATURATED FATTY-ACIDS; CHLORELLA-EMERSONII; BIODIESEL PRODUCTION; LUTEIN PRODUCTION; GREEN MICROALGAE; LIPID PRODUCTION; CELL-WALLS; CULTIVATION; GROWTH; CO2 | biofuels; fatty acids; Graesiella emersonii; lutein; microalgae; omega-6; pigments; taxonomy | Biodiesel; Feedstocks; Linoleic acid; Microorganisms; Palmitic acid; Pigments; Sodium chloride; Biochemical characterization; Bioproducts; Dry cells; Graesiellum emersonii; Lutein; Micro-algae; Microalga; Morphological characteristic; Omega-6; Taxonomic characterization; Microalgae | English | 2022 | 2022-11 | 10.3390/en15228725 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | The Circulating Current Reduction Control Method for Asynchronous Carrier Phases of Parallel Connected Inverters | Parallel operation of inverters is one of the most effective and representative ways to increase system capacity. However, zero-sequence circulating currents occur due to the practical deviations of components constituting individual inverters in case of parallel connected inverters in which a common direct current (DC) or alternating current (AC) bus is shared. In particular, circulating currents of the high-frequency component as well as those of the low-frequency component are generated due to the asynchronization of the carriers of individual inverters. In order to suppress the circulating currents as such, the phases of the carriers should be shifted as much as the phase errors between the carriers to compensate for the phase errors. A difficulty in this phase compensation control is that when there are several pulse-width modulation (PWM) carriers, it is impossible to identify the phase of each carrier. In this paper, to overcome the problem, a method to specify the position of one of the many carriers and control the carriers and compensate for phase errors based on the relevant phase was proposed. In addition, this paper includes the analysis of circulating currents generated in the case of carrier phase errors and proposes a method to identify carrier phase errors and compensate for the relevant errors. The proposed method was verified through simulations and experiments. | Lee, Seung-Yong; Jung, Jae-Jung | Kyungpook Natl Univ, Sch Elect & Elect Engn, IT Coll, Daegu 41566, South Korea | 57437158700; 55368433400 | stock14@knu.ac.kr;jj.jung@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 15 | 5 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 0.15 | 2025-06-25 | 1 | 2 | circulating current; high power conversion system; asynchronous carrier; parallel inverters; power quality | CONTROL STRATEGY; OPERATION; PWM | Asynchronous carrier; Circulating current; High power conversion system; Parallel inverters; Power quality | Errors; Quality control; Asynchronoi carrier; Carrier phase error; Circulating current; Circulating current reduction; High power conversion; High power conversion system; Parallel inverter; Parallel-connected; Phase error; Power conversion systems; Electric inverters | English | 2022 | 2022-03 | 10.3390/en15051949 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Thermodynamic Analysis and Working Fluid Selection of a Novel Cogeneration System Based on a Regenerative Organic Flash Cycle | Recently proposed organic flash cycles maintain lower irreversibility in the evaporator than traditional organic Rankine cycles. This study presented a novel combined heat and power system that was based on a regenerative organic flash cycle, in order to improve thermal efficiency. Parametric analyses for the proposed combined heat and power system were carried out, using six working fluids, and performed with heat source temperatures and heat sink temperatures that ranged from 130 degrees C to 170 degrees C, and from 20 degrees C to 40 degrees C, respectively. The results showed that the preferable working fluid was altered, with a change in the operating condition. Isopentane, R1234ze(Z), R1233zd(E), and R245fa performed better at a cooling water temperature of 20 degrees C. The system that used R245fa showed more promising performance when the heat source temperatures were set to 150 degrees C and 160 degrees C. R365mfc was determined to be the best working fluid at a heat source temperature of 150 degrees C, and at cooling water temperatures of 30-40 degrees C. Finally, the analyses evaluated the year-round system performance on the basis of monthly ambient and water temperatures in Daegu, Korea, as the system's parameters. Compared to the single regenerative organic flash cycle, the thermal efficiency of the novel system improved significantly, from 8.37 % to 32.80% in August, and to 74.34% in February. | Chen, Haojie; Kim, Man-Hoe | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, IEDT, Daegu 41566, South Korea | 57963656300; 55686310000 | manhoe.kim@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 15 | 21 | SCIE | ENERGY & FUELS | 2022 | 3.2 | 66.8 | 0.64 | 2025-06-25 | 7 | 8 | regenerative organic flash cycle; combined heat and power; waste heat recovery; working fluid; efficiency | WASTE HEAT-RECOVERY; RANKINE-CYCLE; PERFORMANCE ANALYSIS; ZEOTROPIC MIXTURES; ORC; DESIGN; PLANT; POWER | combined heat and power; efficiency; regenerative organic flash cycle; waste heat recovery; working fluid | Cogeneration plants; Cooling water; Fluids; Rankine cycle; Scattering parameters; Temperature; Thermoanalysis; Waste heat; Waste heat utilization; 150 ° C; Combined heat and power system; Combined-Heat and Power; Cooling water temperature; Heat source temperatures; Organics; Regenerative organic flash cycle; Thermal-efficiency; Waste-heat recovery; Working fluid; Efficiency | English | 2022 | 2022-11 | 10.3390/en15217843 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Comparative analysis of antimicrobial resistance and genetic characteristics of Escherichia coli from broiler breeder farms in Korea | Broiler breeder farms could be a reservoir of Escherichia coli, disseminating antimicrobial resistance and virulence factors. We investigated the antimicrobial resistance of E. coli from nine broiler breeder farms and characterised their resistance and virulence genes. A total of 256 E. coli showed a high level of resistance to tetracycline, nalidixic acid, ampicillin, and cephalothin, followed by trimethoprim-sulfamethoxazole and chloramphenicol. The resistance to nalidixic acid, ampicillin, trimethoprim-sulfamethoxazole, and chloramphenicol showed significant differences among the farms. Among 202 beta-lactam-resistant E. coli, 138 carried beta-lactamase genes. The most prevalent beta-lactamase gene was bla(TEM-1), of which the presence differed significantly across the farms. Out of 197 tetracycline-resistant E. coli isolates, tetA and tetB were detected in 164 and 50, with significant differences among the farms. Also, 45 of 196 nalidixic acid-resistant E. coli carried qnrS, whereas 67 of 149 trimethoprim-sulfamethoxazole-resistant E. coli carried sul2. Among the five virulence genes tested, ompT was the most prevalent, and all genes except for iutA distributed significantly different among the farms. The phenotypic and genotypic characteristics of E. coli were significantly different among the farms; therefore, management at the breeder level is required to control the vertical transmission of E. coli. | Kim, Shin-Woo; Kim, Koeun; Lee, Young Ju | Kyungpook Natl Univ, Coll Vet Med, Daegu 41566, South Korea; Kyungpook Natl Univ, Zoonoses Res Inst, Daegu 41566, South Korea | 59104597300; 57220805028; 56612134500 | youngju@knu.ac.kr; | CANADIAN JOURNAL OF ANIMAL SCIENCE | CAN J ANIM SCI | 0008-3984 | 1918-1825 | 102 | 2 | SCIE | AGRICULTURE, DAIRY & ANIMAL SCIENCE | 2022 | 1 | 66.9 | 1.14 | 2025-06-25 | 7 | 6 | Escherichia coli; poultry; broiler parent stock; antimicrobial resistance; virulence gene | MEDIATED QUINOLONE RESISTANCE; BETA-LACTAMASES; VERTICAL TRANSMISSION; ANTIBIOTIC-RESISTANCE; DETERMINANTS QNR; SALMONELLA; PREVALENCE; STRAINS; IDENTIFICATION; AAC(6')-IB-CR | antimicrobial resistance; broiler parent stock; Escherichia coli; poultry; virulence gene | ampicillin; cefazolin; cefepime; cefotaxime; cefoxitin; ceftazidime; cefuroxime; chloramphenicol; ciprofloxacin; nalidixic acid; tetracycline; virulence factor; antibiotic resistance; antibiotic sensitivity; Article; bacterial strain; bacterial virulence; bacterium identification; bacterium isolation; beta-lactam resistance; broiler; comparative study; controlled study; disk diffusion; Escherichia coli; genetic trait; genotype; nonhuman; polymerase chain reaction; prevalence; quality control; sequence analysis; tetracycline resistance | English | 2022 | 2022-06 | 10.1139/cjas-2021-0090 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Review | Bioremediation of organic pollutants: a mini review on current and critical strategies for wastewater treatment | The release and prevalence of organic pollutants in an aqueous environment due to industrial discharges, agricultural operations, or inappropriate waste disposal is a huge threat to attaining sustainable development. As a result, wastewater treatment has attained a huge scope as it is evident from the number of articles published in recent years. Among the various techniques, bioremediation is one of the economical and eco-friendly means of wastewater treatment for the removal of organic pollutants. Microbial community and microalgae are the front runners of this process as they result in treated water and sludge or biomass formation. This mini review put forwards the types of organic pollutants and the bioremediation strategies using microbes and micro-algae, the role of genetically engineered microbes on the bio-remediation of organic pollutants and the recent applications of Artificial Intelligence (AI) techniques that have been implemented for improving the efficiency of the methods. The gap between practicability and applicability of the bioremediation process was also identified in this review. In addition, the economics and future research needs are discussed as outcomes. | Haripriyan, U.; Gopinath, K. P.; Arun, J.; Govarthanan, Muthusamy | Anna Univ, Dept Chem Engn, AC Tech Campus, Chennai 600025, Tamil Nadu, India; Swinburne Univ Technol, Dept Chem Engn, Sarawak Campus, Kuching 93350, Malaysia; Saveetha Univ, Dept Sustainable Engn, Saveetha Sch Engn, Saveetha Inst Med & Tech Sci, Chennai 602105, Tamil Nadu, India; Sathyabama Inst Sci & Technol, Ctr Waste Management, Chennai 600119, Tamil Nadu, India; Kyungpook Natl Univ, Dept Environm Engn, Daegu 41566, South Korea; Saveetha Inst Med & Tech Sci, Dept Biomat, Saveetha Dent Coll & Hosp, Chennai 600077, Tamil Nadu, India | Muthusamy, Govarthanan/C-1491-2014; Jayaseelan, Arun/AAT-5552-2021; Govarthanan, Muthusamy/C-1491-2014 | 57405225700; 24757925200; 57195403181; 54881927600 | arunjayaseelan93@gmail.com;gova.muthu@gmail.com; | ARCHIVES OF MICROBIOLOGY | ARCH MICROBIOL | 0302-8933 | 1432-072X | 204 | 5 | SCIE | MICROBIOLOGY | 2022 | 2.8 | 67.0 | 3.23 | 2025-06-25 | 73 | 90 | Persistent organic pollutants; Wastewater; Bioremediation; Artificial intelligence; Genetic engineering | BIODEGRADATION | Artificial intelligence; Bioremediation; Genetic engineering; Persistent organic pollutants; Wastewater | Artificial Intelligence; Biodegradation, Environmental; Environmental Pollutants; Microalgae; Water Purification; polychlorinated biphenyl; polychlorinated dibenzodioxin; polychlorinated dibenzofuran; polycyclic aromatic hydrocarbon; artificial intelligence; bioattenuation; bioaugmentation; bioprocess; bioremediation; biostimulation; microalga; microorganism; nonhuman; persistent organic pollutant; Review; transgenic microorganism; waste water management; bioremediation; microalga; pollutant; water management | English | 2022 | 2022-05 | 10.1007/s00203-022-02907-9 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Cellulomonas fulva sp. nov., isolated from oil- contaminated soil | A yellow- coloured, Gram- stain- positive, motile, aerobic and rod- shaped bacteria, designated DKR- 3T, was isolated from oil- contaminated experimental soil. Strain DKR- 3T could grow at pH 5.0-10.5 (optimum, pH 7.0-8.5), at 10-40 degrees C (optimum, 25-32 degrees C) and tolerated 3.5 % of NaCl. Phylogenetic analyses based on its 16S rRNA gene sequence indicated that strain DKR3T formed a lineage within the family Cellulomonadaceae and was clustered with members of the genus Cellulomonas. Strain DKR-3T had highest 16S rRNA gene sequence similarities to Cellulomonas gelida DSM 20111T (98.3 %), Cellulomonas persica JCM 18111T (98.2 %) and Cellulomonas uda DSM 20107T (97.8 %). The predominant respiratory quinone was tetrahydrogenated menaquinone with nine isoprene units [MK- 9(H4)]. The principal cellular fatty acids were anteiso- C15:0, C16: 0 and anteiso- C17:0. The major polar lipids were diphosphatidylglycerol and phosphatidylglycerol. The cell- wall diamino acid was iota-ornithine whereas rhamnose and glucose were the cell- wall sugars. The DNA G+C content was 74.2mol %. The genome of strain DKR- 3T was 3.74 Mb and contained three putative biosynthetic gene clusters. The average nucleotide identity and digital DNA-DNA hybridization relatedness values between strain DKR- 3T and its phylogenetically related members were below the species threshold values. Based on a polyphasic study, strain DKR- 3T represents a novel species belonging to the genus Cellulomonas, for which the name Cellulomonas fulva sp. nov. is proposed. The type strain is DKR- 3T (=KACC 22071T=NBRC 114730T). | Dahal, Ram Hari; Kim, Jungmin; Kim, Dong-Uk; Dong, Ke; Hong, Yongseok; Chaudhary, Dhiraj Kumar | Kyungpook Natl Univ, Sch Med, Dept Microbiol, Daegu 41944, South Korea; Sangji Univ, Dept Biol Sci, Wonju 26339, South Korea; Kyonggi Univ, Dept Life Sci, Suwon 16227, South Korea; Korea Univ, Dept Environm Engn, Sejong Campus, Sejong City 30019, South Korea | Dong, Ke/AAL-8538-2021; Dahal, Ram Hari/H-8673-2016; Chaudhary, Dhiraj/S-7772-2016; Chaudhary, Dhiraj Kumar/S-7772-2016 | 57110097800; 57211297681; 57206099551; 56414167300; 37761423700; 57191257432 | dhirajchaudhary2042@gmail.com; | INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY | INT J SYST EVOL MICR | 1466-5026 | 1466-5034 | 72 | 1 | SCIE | MICROBIOLOGY | 2022 | 2.8 | 67.0 | 0.47 | 2025-06-25 | 4 | 4 | oil-contaminated soil; Cellulomonas fulva; experimental soil; phylogeny; Cellulomonadaceae | ALGORITHM; ANNOTATION | Cellulomonadaceae; Cellulomonas fulva; Experimental soil; Oil-contaminated soil; Phylogeny | Bacterial Typing Techniques; Base Composition; Cellulomonas; DNA, Bacterial; Fatty Acids; Phylogeny; RNA, Ribosomal, 16S; Sequence Analysis, DNA; Soil; arabinose; cardiolipin; chymotrypsin A; diamino acid; esterase; esterase lipase; fatty acid; gelatin; genomic DNA; gluconate potassium; glucose; lactic acid; maltose; mannitol; n acetyl beta glucosaminidase; oil; ornithine; phosphatidylglycerol; quinone derivative; rhamnose; ribose; RNA 16S; unclassified drug; urea; bacterial DNA; Article; bacterial strain; bacterium isolation; bioremediation; cell motility; cell wall; Cellulomonas; Cellulomonas fulva; Cellulomonas gelida; Cellulomonas persica; Cellulomonas uda; contamination; DNA DNA hybridization; DNA extraction; gene cluster; gene sequence; nonhuman; pH; phylogenetic tree; phylogeny; salt tolerance; soil; transmission electron microscopy; bacterium identification; chemistry; DNA base composition; DNA sequence; genetics; soil | English | 2022 | 2022 | 10.1099/ijsem.0.005209 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Hymenobacter translucens sp. nov. and Hymenobacter pini sp. nov. isolated from soil | Two novel bacterial strains BT175(T) and BT728(T) were isolated from soil collected in the Republic of Korea. Both strains were Gram stain negative, rod shaped, and had circular, convex, and pink-colored colonies. The 16S rRNA gene sequence similarity between the strains BT175(T) and BT728(T) was 93.6%, indicating that they represent a distinct species. 16S rRNA sequence analysis indicated that strains BT175(T) and BT728(T) belong to a distinct lineage within the genus Hymenobacter (family Hymenobacteraceae, order Cytophagales, class Cytophagia, phylum Bacteroidetes). Strain BT175(T) was closely related to Hymenobacter persicinus 1-3-3-3(T) (97.2%, 16S rRNA gene similarity), Hymenobacter knuensis 16F7C-2(T) (96.6%), and Hymenobacter daejeonensis PB105(T) (96.1%). Strain BT728(T) was closely related to Hymenobacter rigui KCTC 12533(T) (98.4%), Hymenobacter metallilatus 9PBR-2(T) (97.6%), and Hymenobacter perfusus LMG26000(T) (97.4%). Strain BT175(T) and BT728(T) were found to have the MK-7 as the major respiratory quinone. The DNA G + C content of strain BT175(T) was 61.6 mol% and BT728(T) was 59.6 mol%, respectively. Characterization based on polyphasic analysis indicated that strains BT175(T) and BT728(T) represent novel species of the genus Hymenobacter and the names Hymenobacter translucens sp. nov. and Hymenobacter pini sp. nov. are proposed. The type strain of Hymenobacter translucens is BT175(T) (= KCTC 72330(T) = NBRC 115441(T)) and Hymenobacter pini is BT728(T) (= KACC 22629(T) = NBRC 115444(T)). | Bang, Minji; Kim, Myung Kyum; Jung, Hee-Young | Seoul Womens Univ, Coll Nat Sci, Dept Bio & Environm Technol, Seoul 01797, South Korea; Kyungpook Natl Univ, Sch Appl Biosci, Daegu 41566, South Korea; Kyungpook Natl Univ, Inst Plant Med, Daegu 41566, South Korea | Kim, Jung Oh/JDC-5061-2023 | 57223937098; 35080583500; 7403029383 | biotech@swu.ac.kr;heeyoung@knu.ac.kr; | ARCHIVES OF MICROBIOLOGY | ARCH MICROBIOL | 0302-8933 | 1432-072X | 204 | 7 | SCIE | MICROBIOLOGY | 2022 | 2.8 | 67.0 | 0 | 2025-06-25 | 0 | 0 | Hymenobacteraceae; Hymenobacter; Novel species; Taxonomy; Soil bacteria | EMENDED DESCRIPTION; SANDSTONE; BACTERIA | Hymenobacter; Hymenobacteraceae; Novel species; Soil bacteria; Taxonomy | Bacterial Typing Techniques; Cytophagaceae; DNA, Bacterial; Fatty Acids; Phylogeny; RNA, Ribosomal, 16S; Sequence Analysis, DNA; Soil; Soil Microbiology; mk 7; quinone derivative; RNA 16S; unclassified drug; bacterial DNA; fatty acid; RNA 16S; Article; bacillus (rod shaped bacterium); bacterial gene; bacterial strain; bacterium colony; bacterium identification; bacterium isolate; Bacteroidetes; biochemical analysis; DNA base composition; gene sequence; genetic similarity; genus; Gram negative bacterium; Hymenobacter; Hymenobacter daejeonensis; Hymenobacter knuensis; Hymenobacter metallilatus; Hymenobacter perfusus; Hymenobacter persicinus; Hymenobacter pini; Hymenobacter rigui; Hymenobacter translucens; microbial morphology; nonhuman; nucleotide sequence; phylogenetic tree; physiology; sequence analysis; soil; South Korea; species; Sphingobacteriales; taxonomic identification; type strain; whole genome sequencing; DNA sequence; Flexibacteraceae; genetics; microbiology; phylogeny | English | 2022 | 2022-07 | 10.1007/s00203-022-02991-x | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
페이지 이동: