• Title/Summary/Keyword: Humidity effectiveness

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Development of Refer-container Remote Monitoring System for Ship using RF Module (RF 모듈 방식의 선박용 냉동 컨테이너 원격 감시시스템 개발)

  • Yang, Hyun-Suk;Lim, Hyun-Jung;Kim, Kun-Woo;Kwon, Yeong-Gwal;Kim, Dong-Mook;Lee, Sung-Geun
    • Journal of Advanced Marine Engineering and Technology
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    • v.31 no.4
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    • pp.425-432
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    • 2007
  • This paper describes a development of ship's refer-container remote monitoring system(RRMS). This system consists of Master, repeater with a switched mode power supply(SMPS) and slave terminal. Slave terminal is composed of wireless MODEM and microprocessor part, checks its conditions like temperature. humidity & etc through the interrogate port(IP) of refer-container. and transmits their data to master. Repeater's role is that connect so that signal which is transmitted from Slave Terminal by Master may not receive electric wave interference by container boxes. We verify the effectiveness of proposed system through the experimental works in container yard and ship.

An Interface Module for Dehumidify Dryer in a Injection Molding Smart Factory System

  • Kang, Un-Gu
    • Journal of the Korea Society of Computer and Information
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    • v.23 no.11
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    • pp.123-128
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    • 2018
  • When the injection molding system molds some plastic products, defective product rate will be increased if plastic materials have some excessive moisture content. Therefore, it is very important to control the dehumidification and drying of plastic material. Since the moisture content of the plastic material may change from time to time depending on the material and the molding process, it is necessary to observe the change in real time and maintain a constant moisture content. To solve these problems, I proposed a smart factory system model for plastic molding in this paper. In addition, I designed the interface module to be installed in the dehumidifying dryer which is the core of this process. In addition to this, performance tests were conducted to check the effectiveness and the results were verified as valid.

Beverage Sales Data Analysis and Prediction using Polynomial Models (다항식 모델을 이용한 음료 판매 데이터 분석 및 예측)

  • Lee, Min Goo;Park, Yong Kuk;Jung, Kyung Kwon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2014.10a
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    • pp.701-704
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    • 2014
  • This Paper proposed the analysis and prediction method of beverage sales. We assumed weather had a relationship with beverage sales. We got the output as sales amount from a temperature and humidity of weather as input by using polynomial equation. We had modelling as quadric function with input and output data. In order to verify the effectiveness of proposed method, the sales data were collected over a 4 months during February 2014. The results showed that the proposed method can estimate sales data.

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A Study on Evaluation of LED Lighting Environments for Energy Saving and Work Effectiveness (에너지 저감과 업무 효율성을 위한 LED 조명환경 평가에 대한 연구)

  • Kim, Hyung-Sun;Lim, Jae-Hyun;Lee, Kee-Sun;Kim, Kil-Hee;Jung, Hee-Chang;Kim, Jin Ho
    • Science of Emotion and Sensibility
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    • v.18 no.2
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    • pp.45-54
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    • 2015
  • This study carried out an experiment to identify subject's work effectiveness and energy saving effect using LED light. Towards this end, this study configured nine various lighting environments in order to control PWM (Pulse Width Modulation) and illuminance (lux), which are the characteristics of LED light. The PWM ratio of LED light was set as R:G:B=1:1:1, R:G:B=4:1:5, and R:G:B=8:7:7, respectively, and illuminance (lux) was set as 400 lx, 700 lx, and 1000 lx, respectively. In addition, the indoor environment was set temperature $20-24^{\circ}C$, humidity 50%-60%, and the amount of clothing 1. This study analyzed work effectiveness and energy consumption in nine lighting environments, each. Error correction was performed for work effectiveness analysis, and cumulative power consumption was measured in each lighting environment for energy consumption analysis. According to experiment results through the lighting environments suggested in this study, accuracy and spent time effectiveness were good in 700lux and higher than 400lux. For spent time, the best effectiveness was revealed in the suggested PWM ratio, R:G:B=8:7:7. The lowest power consumption on each illuminance (lux) was revealed in the order of R:G:B=8:7:7, RGB=1:1:1, and R:G:B=4:1:5. Therefore, pulse-width modulation effect is proposed in this paper was found to affect the efficiency and energy saving.

Investigation "On the Paddy Storage at the Farm Level" (농가의 미곡저장실태)

  • 김용환;서상용;김성태;나우정;민영봉
    • Journal of Biosystems Engineering
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    • v.5 no.1
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    • pp.33-42
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    • 1980
  • This study was carried out to investigate the actual environmental paddy storage conditions in conventional Korean farm warehouses. The paddy storage conditions by the locations and sizes of warehouses were figured out. The effectiveness of the small insulated box for storing paddy was also examined. Observations were made at sixteen different warehouses located in Moonsan-Myeon, Jinyandg-gun, Gyungnam Province from July lst to September 28 th, the period which was considered to be the worst for storing grains. The results are as follows ; 1. the average temperatures of rough rice and air inside the warehouse were 0.9 and 0.7$^\circ$ higher than the outside air temperature. 2. The average relative humidity in warehouses was 1.5percent higher than that of the atomosphere. This fact resulted in the increased moisture content of grains. Therefore, the ventilation for equalizing the relative humidity of inside and outside of warehouses was required. 3. The dry matter of stored rough rice was decreased by 1.1 percent in average druing the observation period. In order to reduce the dry matter loss, application of new grain storing method ;hermetic storage or filling inert gas storage, was highly recommended. 4. Environmental conditions for storing rough rice in a warehouse located in a sloping site are, in general , better than those of a warehouse located in a flat site. But as far as the dry matter of rough rice was concerned, above situation is not always satisfactory. Because it is fairly frequent to observe the higher rate of moisture absorption by grains stored in a warehouse located in a sloping site. 5. Environmental conditions for storing rough rice in a large-scale warehouse were better than those in a small size warehouse. Therefore, it is advisible for farmers to store their grins in the large-scale warehouses commonly used by villagers. 6. It was undesirable to store rough in a insulated box.

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IoT Enabled Smart Emergency LED Exit Sign controller Design using Arduino

  • Jung, Joonseok;Kwon, Jongman;Mfitumukiza, Joseph;Jung, Soonho;Lee, Minwoo;Cha, Jaesang
    • International journal of advanced smart convergence
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    • v.6 no.1
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    • pp.76-81
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    • 2017
  • This paper presents a low cost and flexible IoT enabled smart LED controller using Arduino that is used for emergency exit signs. The Internet of Things (IoT) is become a global network that put together physical objects using network communications for the purpose of inter-communication of devices, access information on internet, interaction with users as well as permanent connected environment. A crucial point in this paper, is underlined on the potential key points of applying the Arduino platform as low cost, easy to use microcontroller with combination of various sensors applied in IoT technology to facilitate and establishment of intelligent products. To demonstrate the feasibility and effectiveness of the system, devices such as LED strip, combination of various sensors, Arduino, power plug and ZigBee module have been integrated to setup smart emergency exit sign system. The general concept of the proposed system design discussed in this paper is all about the combination of various sensor such as smoke detector sensor, humidity, temperature sensor, glass break sensors as well as camera sensor that are connected to the main controller (Arduino) for the purpose of communicating with LED exit signs displayer and dedicated PC monitors from integrated system monitoring (controller room) through gateway devices using Zig bee module. A critical appraisal of the approach in the area concludes the paper.

IoT-based IOS Application to Improve Heating and Cooling Satisfaction Level of Urban Railway Passenger (도시철도 차량 이용자 냉난방 만족도 제고를 위한 IoT 기반 IOS 어플리케이션)

  • Kim, Dong-Hak;Park, Pu-Sik;Kim, Byung-Seo
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.18 no.1
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    • pp.1-8
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    • 2018
  • While the number of passengers using urban railroads is increasing day by day, the number of complaints from passengers is also increasing. In order to resolve problems caused by poor communication between urban railroad officials and passengers in this paper. An IOS application using the Internet of Things (IoT) technology is proposed for providing safety and comfort temperature service(s) and for taking prompt action(s) of passengers complaints. In this proposal system, the temperature & humidity sensors were placed in a suitable location within the train. At the same time, transferring measurements to the remote server, allowing passengers to request their desired temperature through the IOS Application. Like this based on the collected data, I suggest a system that urban railroad officials can control temperature & humidity of the train. The proposed system was implemented by the Gwangju Metro Line 1 to validate its effectiveness.

Disinfection of Penicillium-infected Wheat Seed by Gaseous Chlorine Dioxide

  • Jeon, Young-ah;Lee, Ho-sun;Lee, Young-yi;Lee, Sokyoung;Sung, Jung-sook
    • Research in Plant Disease
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    • v.21 no.2
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    • pp.45-49
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    • 2015
  • Seeds of wheat (Triticum aestivum L. cv. Olgeurumil) were infected with Penicillium sp. at mean infection rate of 83%. Penicillium sp. was detected in endosperm with bran but not in embryo. Gaseous chlorine dioxide ($ClO_2$) effectively inhibited growth of Penicillium sp. at concentration of 5 to $20{\mu}g/ml$. As treatment duration was extended from 1 to 3 h, growth of Penicillium sp. was completely suppressed even at $10{\mu}g/ml$. There was no significant reduction in the incidence of Penicillium sp. at 30% relative humidity (RH). However, the incidence of Penicillium sp. was 27.7% at 50% RH, further those were 3.5% and 0.2% at 70% and 80% RH, respectively. Seed germination was not affected by $ClO_2$ treatment at all the RH conditions. Water-soaked seeds (30% seed moisture content) showed a drastic reduction in the incidence of Penicillium sp. when treated at more than $10{\mu}g/ml$ of $ClO_2$. The incidences of Penicillium sp. were 3.3, 1.8 and 1.2% at 10, 15 and $20{\mu}g/ml$, respectively. The incidence of Penicillium sp. in dry seeds with 9.7% seed moisture content did not reduce when treated with 5 and $10{\mu}g/ml$ at 50% RH although it tended to decrease as $ClO_2$ concentration increased to $20{\mu}g/ml$. Seed germination was not affected by $ClO_2$ treatment at the tested concentrations. These results indicated that gaseous $ClO_2$ was effective disinfectant to wheat seeds infected with Penicillium sp. and that the effectiveness of $ClO_2$ strongly increased when moisture content around or inside of the seed was increased.

Optimization Method for MEA Performance Considering the Non-Uniformity of Operating Condition in a Large-area Bipolar Plate (대면적 분리판의 운전 환경 불균일성을 고려한 MEA 성능최적화 방법)

  • Kim, Sungmin;Sohn, Young-Jun;Woo, Seunghee;Park, Seok-Hee;Jung, Namgee;Yim, Sung-Dae
    • New & Renewable Energy
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    • v.17 no.2
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    • pp.50-58
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    • 2021
  • We proposed an MEA development methodology that accurately measures intrinsic MEA performance while considering the uneven reaction environments formed inside a large-area BP. To facilitate measurement of the inherent MEA performance, we miniaturized the active area of the MEA to 3 cm2, and prepared two MEAs with different ionomer contents of 0.65 and 0.80 (I/C). By simulating the operating conditions of a 100 cm2 BP at the inlet (I), center (C), and outlet (O), the oxygen concentration and relative humidity were determined to be 20.7, 13.8, 11.7%, and 50, 66.1, and 70.1% respectively. We measured the performance and electrochemical analysis of the prepared MEAs under the three simulated conditions. Based on the results of statistical analysis of the evaluated MEA performance data, I/C 0.65 MEA had a higher average performance and lower performance deviation than I/C 0.80 MEA. Hence, it can be concluded that an I/C 0.65 MEA is a more effective MEA for large-area BP. Based on the above research process, we confirmed the effectiveness of the proposed MEA development methodology.

Prediction of Cooling Performance for Indirect Evaporative Cooling System Using Danpla Sheet (단프라시트를 적용한 간접식 증발냉각 장치의 냉각 성능 예측)

  • Kim, Myung-Ho;Kim, Byoung Jae
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.11
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    • pp.892-897
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    • 2020
  • Previous plastic heat exchangers are expensive because the mold must be newly manufactured depending on the air conditioning space. On the other hand, danpla is so thin that the heat exchange performance is excellent. Moreover, danpla can be used easily in ventilation systems in view of fabrication. This study proposes correlations for the cooling performance of an indirect evaporative cooling system. The experimental apparatus consisted of a heat exchanger, spray nozzle, fan, thermostat, pump, and measuring sensors for temperature, humidity, and airflow rate. The results showed that the effectiveness decreased gradually as the airflow rate increased. In addition, there was an optimal condition in terms of effectiveness. The performance prediction correlations were determined using the experimental data from various conditions. The proposed correlations showed performance accuracies within 4 % error.