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박정준(Jeung-Jun Park),장홍순(Hong-Soon Chang),서상현(Sang-Hyun Seo) 대한전기학회 2014 대한전기학회 학술대회 논문집 Vol.2014 No.10
The types of slop roof for PY system are divided like closeing installation, horizontal installation, stair installation, rotating installation. the standard is the horizontal installation type and all types are compared to this. in the case of closing installation type reduce 10.21%, stair installation type reduce 0.24%, rotating installation type reduce 1.06% reduce. the result is produced by simulation program. and under several conditions. in this conditions, a point of the compass is able to be changed. and each values is reduced under 5%. therefore the efficiency is able to be estimated. this study is able to make good result for P.V system on the all conditions. change of roof angle is able to change the efficiency of P.V system but the difference is a little. if this study is concerned to P.V system, good expectation is able to be made.
마이크로그리드를 기반으로 한 중소 산업용수용가의 최대수요전력 저감방안
장홍순(Hong-Soon Chang),김철진(Cherl-Jin Kim),박상원(Sang-Won Park) 대한전기학회 2017 전기학회논문지 P Vol.66 No.1
Recently, the power consumption of industrial consumer has increased rapidly, causing problems such as lack of power reserve margin in summer and winter, and therefore there is a growing need for maximum demand power management to consumers. In this paper, we studied small microgrid system consisting of battery ESS and photovoltaic power system, applied to small and medium sized factories to reduce the maximum demand power of daily industrial power load. To verify the validity of the study, we simulated a small microgrid system using Matlab/Simulink software. As a result of applying the simulation to small and medium sized plants that consume a lot of power, it is confirmed that there is a 13% reduction in demand compared to the existing maximum demand power. This result is expected to contribute to the improvement of the power reserve margin.
두 종류의 다른 작동유체가 ORC 시스템의 성능에 미치는 영향
장홍순(Hong-Soon Chang),송영길(Yeong-Kil Song),한영섭(Young-Sub Han) 대한설비공학회 2013 설비공학 논문집 Vol.25 No.7
The organic Rankine Cycle (ORC) uses a kind of refrigerant as a working fluid that evaporates at relatively low temperature, as the Rankine Cycle uses superheated steam as the working fluid. A small scale ORC test bench was installed, and two different working fluids (R245fa and R134a) were injected into the test bench. The test bench was in operation with the two different working fluids under the same conditions. The effects against the system performance from the different working fluids were analysed, and root causes were identified. Other factors reflecting the power generation efficiency were also found. A conclusion was drawn, that R245fa makes the system perform better, than R134a.
금속 부품 열처리업체의 최대전력절감장치 동작 특성 및 효과 분석
장홍순(Hong-Soon Chang),한영섭(Young-Sub Han),황익환(Ik-Hwan Hwang),서상현(Sang-Hyun Seo) 한국조명·전기설비학회 2014 조명·전기설비학회논문지 Vol.28 No.6
In this paper, maximum power is the lowering device using the facility’s energy use and peak load electricity through analyzing attitude should like to make it reduce its power base rate. Simulator to manage the demand for power, a maximum electric power base power from electronic watt-hour meters by a device’s signal, predictive power, the current power by computing the goal of power for less thanMaximum peak power and peak shift, so that you can manage, and peak York, which role you want a cut Metal heat treatment result which analyzes the data, demand for electricity company over the years of analyzing the characteristics of each load, and effects and Reducing power consumption device every month identified sevenSequence control to the load system and successful power control is about showing that the defined goals.
최대전력 분석시뮬레이터 개발 및 조명설비 제어 시뮬레이션
장홍순(Hong-Soon Chang),한영섭(Young-Sub Han),서상현(Sang-Hyun Soe) 한국조명·전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.3
The maximum power analysis simulator took advantage of the facilities and power consumption reduction simulator test scenario development and testing of improvement in the scenario. As a maximum demand power controller, Maximum power analysis simulator performs control and disperasion of maximum demand power by calculating base power, load forecast, and present power which are based on signal of watt-hour meter to keep the electricity under the target. In addition, various algorithms to select appropriate control methode on each of the light installations through the peak demand power is configured to management. The simulation shows the success of control power for the specified target controlled by five sequential lighting installations.
R-245fa 및 NOVEC 649 작동유체에 따른 ORC 시스템 성능 변화
장홍순(Hong-Soon Chang),한영섭(Young-Sub Han),송영길(Yeong-Kil Song),김성현(Sung-Hyun Kim) 한국지열·수열에너지학회 2016 한국지열에너지학회논문집 Vol.12 No.3
A test unit for Organic Rankine Cycle (ORC) power generation system was developed and experimentally reviewed the performance of the ORC system. Two different organic fluids (R- 245fa & Novec 649) were tested as working fluids for the system. System behavior was measured and analyzed along with the variables, such as temperature, pressure, rpm and shaft power. It is one of the findings that Novec 649 fluid is to be less pressurized than R-245fa in order to up to the heat source (boiler) capacity, that limits the experiment as high as 2 kW in shaft power.
윤신용,최근수,백수현,장홍순,서상현,Yoon, Shin-Yong,Choi, Geun-Soo,Baek, Soo-Hyun,Chang, Hong-Soon,Seo, Sang-Hyun 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.2
We were analyzed the piezoelectric characteristic for electronics printing to inkjet printing system. These applications were possible use to Actuator, MEMS, FPCB, RFID, Solar cell and LCD color filter etc. Piezoelectric print head is firing from ink droplet control consideration ink viscosity properties. At this time, micro pattern for PCB metal printing was possible by droplet control of piezoelectric driving. These driving characteristics are variable voltage pulse waveform. We are used the piezoelectric analysis software of Finite Element Method (FEM), Piezoelectric design parameters are acquired from piezoelectric analysis, and measurement of piezoelectric. It designed for piezoelectric head to possible electric print pattern of inkjet printing system. For this validity we were established through in comparison with simulation and measurement. Designed piezoelectric specification obtained voltage 98V, firing frequency 10 kHz, resolution 360dpi, drop volume 20pl, nozzle number 256, and nozzle pitch 0.33 mm.