• Journal of the Korean Wood Science and Technology
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• 제20권2호
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• pp.23-30
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• 1992

An experimental external external collector type, solar dehumidification dryer was retrofitted with a simple computer-based control system. Solar, solar-dehumidification, and air-drying of 3cm-thick douglas-fir were carried out to investigate the drying-conditions and characteristics of this system, and to analyze the energy efficiencies of each drying met hods in summer. The drying rate of solar-dehumidification was 12%/day, which was about 2 times and 3 times faster than that of solar-and air-drying, respectively. The amount of diurnal temperature fluctuation inside the solar-dryer was greatly reduced and the energy efficiency was enhanced from 25% to 60% by the dehumidifier.

• 드라이브 ㆍ 컨트롤
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• 제16권2호
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• pp.66-71
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• 2019

In this study, flow analysis and dehumidification experiments were performed on hollow fiber membrane module to confirm the dehumidification characteristics for its different configurations. The CFD for the three different models was conducted using $30^{\circ}C$ temperature and 30%RH inlet humidity for quantitative analysis. Each model has different shape parameters i.e. the number of baffles. Comparison between flow analysis results and dehumidification experiment results revealed a percentage error of about 5%. The difference in relative humidity between the inlet and outlet for each model was calculated using flow analysis data. It was established that the difference in relative humidity of the inlet and outlet for the refined model with three baffles was highest among the three modeled modules of hollow fiber membrane module, i.e. around 9%.

• 설비공학논문집
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• 제26권11호
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• pp.529-534
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• 2014

This research developed a hybrid heat pump system with the functions of dehumidification and heating, which uses simulated air that is like underground air, from an environmental chamber as a heat source. The system consisted of three evaporators and three condensers that were installed in series in the air passage, between the underground and load space. As results, the total amount of dehumidification was 2.726 kg/h, and the heating $COP_h$ was 1.84 at air intake temperature $17^{\circ}C$ and relative humidity 70%, which is a similar condition to underground air. We found that the total amount of dehumidification also increased with the air temperature and humidity. The system $COP_s$ was reached at 2.5, if we include the latent heat of dehumidification in the conventional heat pump system's COP.

• 한국산학기술학회논문지
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• 제16권11호
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• pp.7917-7924
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• 2015

본 연구에서는 친환경 제설제로 사용이 증가되고 있는 CMA를 바탕으로 고성능흡습제로 사용되어지고 있는 SAP와 sodium carbonate, $MgCl_2$/MgO (M/M)에 대하여 제습MB를 제조하고 필름으로서의 흡습율 및 제습성능을 분석하고, 제습필름 적용물질에 대한 Data를 확보하고자 한다. CMA와 SAP를 혼합한 제습MB의 경우 발포현상과 수분문제로 필름가공성이 어려웠으나, Bentonite와 calcium carbonate 첨가로 해결할 수 있었다. 필름가공시 물질들 간의 표면적 공간을 넓히는 역할로서 발포제를 첨가한 경우, CMA와 M/M의 경우 큰 차이성은 없었지만, 발포제가 첨가된 SC의 제습성은 3.15 g/g로 높은 결과를 알 수 있었다. 또한 방청성 테스트의 결과 CMA 제습필름 경우 부식발생은 없었으며, SC의 경우 점 부식 발생, M/M의 경우 부식발생이 일어났다.

• 한국산학기술학회논문지
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• 제16권4호
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• pp.2344-2349
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• 2015

여름철이 고온 다습한 우리나라에서는 잠열부하가 크기 때문에 에어컨만을 사용하면 냉방에너지를 많이 사용하게 된다. 이 때에 제습기를 동시에 사용하면 냉방 중 큰 비중을 차지하는 잠열부하를 줄일 수 있어 실내 공기질도 개선하고 냉방에너지도 절약할 수 있다. 본 연구에서는 가정용 제습기에 사용되는 무기섬유 기질에 메탈 실리케이트가 함침된 소형제습 로터에 대하여 항온항습실에서 로터 회전속도, 재생 공기온도, 실내 공기온도, 실내 상대습도, 제습부 전방풍속을 변화시키며 제습 성능을 측정하였다. 제습 로터는 최적 회전수 (1.0rpm)가 존재하며 최적치를 초과하면 불완전 재생 등으로 제습량이 급격히 감소한다. 재생온도가 높아질수록 재생에는 유리하나 제습-재생과정의 열적인 편차가 급격히 증가하여 제습량이 감소한다. 따라서 최적 재생온도가 존재하는데 본 연구의 경우는 $100^{\circ}C$로 나타났다. 상대습도의 증가에 따라 제습량도 증가한다. 이는 제습제의 제습능력이 상대습도에 의존하는 때문이다. 실내 공기온도의 증가에 따라 제습량도 증가한다. 이는 제습측 온도가 높을 때 재생측 공기와의 열적 편차가 감소하여 제습부의 상당량이 제습에만 사용될 수 있기 때문이다. 전방풍속의 증가에 따라 제습량도 증가한다. 이는 전방풍속의 증가에 따라 열 및 물질전달계수가 증가하기 때문이다.

• 설비공학논문집
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• 제19권7호
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• pp.537-544
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• 2007

To facilitate comparative analysis on the effects of numerous parameters concerning design and operation of a desiccant rotor, it is firstly required to represent the dehumidification performance as numerical indices. In this work is proposed two performance indices of a desiccant rotor: the humidity effectiveness and the enthalpy-leak ratio. The humidity effectiveness represents the actual dehumidification as compared with the dehumidification in an ideal case, while the enthalpy-leak ratio represents the enthalpy transfer from the regeneration side to the dehumidification side. In an ideal case, the two indices approach one and zero, respectively. The effects of numerous parameters on the dehumidification performance of a desiccant rotor are investigated through numerical simulation and represented with the two indices. The results show that the performance indices are mainly determined by three nondimensional parameters each representing the thermal capacity, the sorption capacity, and the transfer capacity of a desiccant rotor.

• 수산해양교육연구
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• 제28권4호
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• pp.1107-1113
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• 2016

In the environment with high humidity causes negative influence on human's body and living condition. As the weather gets more humid, people's interest of dehumidifier for household arising recently. The cooling dehumidifier dehumidify the air by using refrigeration cycle technology which means it removes vapor by let the humid air pass through the cold surface. The amount dehumidified of refrigerating method dehumidifier affected by multiple factors. However, the refrigerating method dehumidifier for household in the market controls pass wind velocity technology to adjust the amount of dehumidification. As the pass wind velocity increases, the amount of wind increases hence the heat exchange amount increases accordingly. However, the amount of dehumidification decreases because the temperature difference between the air and vaporization decreases. Therefore, simply by increasing air velocity does not increase the amount of dehumidification. This research examined the effect of air velocity out of all variety of factors to the amount of dehumidification for refrigerating method dehumidifier.

• 동력기계공학회지
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• 제12권1호
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• pp.35-40
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• 2008

This paper presents an effective cooling dehumidification method to remove odorous gas from food-wastes. The odorous gases, such as Styrene, Ammonia, Hydrogen sulfide and Acetaldehyde, are produced in environments where temperature is $50\sim80^{\circ}C$ and humidity is $40\sim70%$. Under such conditions, experiments are performed reiteratively using experiment equipments. The effect of the cooling dehumidification is measured via measuring instrument, and this research is focused on improving efficiency. The effect of cooling dehumidification using measuring instrument is validated. At $80^{\circ}C$, four type of gases that was mentioned previously showed generally better cooling efficiency with a good result for a component concentration. Among them, hydrogen sulfide gas demonstrated the highest reduction of 50%.

• 멤브레인
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• 제14권1호
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• pp.1-17
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• 2004

오늘날 대부분의 공압시스템에 압축공기 드라이어가 설치되어 있는데 이는 공압장치가 적절히 그리고 신뢰성 있게 작동되기 위해서는 제습된 공기를 사용해야 할 필요가 있을 뿐 아니라 이외에도 많은 이점을 더 가지고 있기 때문이다. 현재 사용되고 있는 압축공기드라이어는 전력이나, 흡착제의 사용으로 경제성이 떨어지며, 냉매제 등 환경적인 제약을 받고 있다. Membrane dryer는 경제적, 환경 친화적으로 이로우며, 각 산업체 뿐만 아니라 제습기능과 정수 기능이 합쳐진 에어정수기의 새로운 응용으로 물이 부족한 열대 우림지역에서 사용될 수 있다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2007년도 동계학술발표대회 논문집
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• pp.322-327
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• 2007

Dedicated outdoor air-conditioning(DOA) system that utilizes pre-cooling and desiccant dehumidification can be superior to conventional cooling and reheating system with respect to energy consumption and indoor thermal comfort. In this work, simulation has been conducted to study various factors that affect the performance of DOA. Dynamic simulation shows the transient variation of temperature and humidity as the on/off control logic is imposed. Exit humidity of process air and flow rate are varied to study the effect on exit temperature of process air, dehumidification quantity, required regeneration temperature and exit humidity of regeneration air. For an outdoor air condition of $28.5^{\circ}C$ temperature, 16 g/kg humidity ratio and 2000 cmh flow rate, the dehumidification efficiency is increased by 4.6% as the flow rate is doubled.