• Title/Summary/Keyword: Air cleaning unit

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Air Cleaning Unit using Combination of $TiO_2$ Photocatalyst and Pulsed Discharge Plasma (산화티타늄 광촉매와 펄스 방전 플라즈마 조합에 의한 공기정화장치)

  • Hong, Yeong-Gi;Sin, Su-Yeon;Gang, Jeong-Hun;Lee, Seong-Hwa;Jo, Jeong-Su;Park, Jeong-Hu
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.48 no.10
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    • pp.710-715
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    • 1999
  • The purpose of this work is to develop a high-efficiency air cleaning system for air pollutants such as particulate and gaseous state in indoor environments. In order to enhance a removal efficiency of gaseous state pollutants, we suggested that pulsed discharge plasma be combined with $TiO_2$ photocatalyst (photocatalytic plasma air cleaning unit). We investigated experimentally the basic characteristics of photocatalytic plasma air cleaning unit and measured air pollutants removal efficiency. The wavelength of light radiated from pulsed discharge plasma under the atmospheric condition was 310~380nm. Its energy is enough to excite the $TiO_2$ photocatalyst and it makes a photochemical reaction in the surface of $TiO_2$ photocatalyst. The removal quantity of trimethylamine$((CH_3)_3N)\; was\; 130mg/m^34 which is twice quantity of pulsed discharge plasma without $TiO_2$ phtocatalyst unit. From the result of gas analysis using FT-IR, nitric oxide was not detected and trimethylamine was decomposed to $H_2O\; and \;CO_2$. And trimethylamine removal efficiency was 95%. These experimental results indicate that photocatalytic plasma air cleaning unit is a potential method in removing the pollutants.

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A Study on the Verification of Air Cleaning Unit for Engine of Tracked Vehicle (궤도차량 엔진용 공기정화기 검증에 관한 연구)

  • Yi, Il-Lang;Kim, Sang-Boo
    • Journal of the Korean Society of Industry Convergence
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    • v.23 no.3
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    • pp.445-452
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    • 2020
  • The air cleaning unit of K00 IFV(or Infantry Fighting Vehicle) has important roles to make sure the engine of the vehicle works precisely as filtering foreign substances in the air such as dust and sands. The entire components including scavenge fan which is one of the important inner part of the air cleaning unit are developed so that we can produce it domestically and don't need to import it from P⁎⁎ Co., the original maker in United Kingdom. This paper introduces a few verification processes including cleaning efficiency and reliability. As this core unit has developed successfully the improvement of military strength and logistics support can be expected. And design capability, manufacturing skills, maintenance ability of tracked weapon system will be increased thanks to the accumulated technical knowledge obtained from this developing project. Foreign currency savings and reducing operational cost can be expected as well in military industry.

Analysis on Particle Cleaning Capacity of Indoor Air Cleaners for Different Flow Rates Considering Energy Consumption (에너지소비를 고려한 실내공기청정기의 풍량별 입자 청정화능력 분석)

  • Han, Bangwoo;Kang, Ji-Su;Kim, Hak-Joon;Kim, Yong-Jin;Won, Hyosig
    • Particle and aerosol research
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    • v.9 no.3
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    • pp.139-147
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    • 2013
  • The performances of indoor air cleaners including particle cleaning capacity and collection efficiency are usually tested at the condition of the maximum air flow rate of the air cleaners. However, the power consumption of the air cleaners is highly dependent on the air flow rate of the individual air cleaners. Therefore, there seems to be an optimized air flow rate for the air cleaning capacity considering power consumption. In this study, clean air delivery rate(or standard useful area as suggested room size) and power consumption have been investigated for different maximum air flow rates of 15 air cleaners and then compared those for different air flow rate modes of the individual 5 air cleaners selected from the 15 cleaners. For the maximum air flow rate conditions of 15 air cleansers, the power consumption per unit area was less related to the maximum air flow rate. However, for the different air flow rate modes of the selected 5 air cleaners, the lower power consumption per unit area was corresponding to the lower air flow rate mode of the individual air cleaners. When considering the operation time to the desired particle concentrations, there was an optimized one in the medium air flow rate modes for the individual air cleaners. Therefore, not only the maximum air flow rate but also lower air flow rates of individual air cleaners should be considered for estimating air cleaning capacity based on energy consumption per unit area.

RESULTS AND FURTHER DEVELOPMENT OF AN AUTOMATIC MILKING SYSTEM

  • Toth, L.;Bak, J.
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • 1993.10a
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    • pp.779-790
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    • 1993
  • A prototype of the feeding-milking robot was developed in the Hungarian Institute of Agricultural Engineering in 1988-89. Before starting with the operation tests the cleaning system had to be elaborated . The cleaning system has two parts. Those are the complete cleaning of the system, producing a practically sterile state, as well as flushing through the milking device between milking of two cows. Separate electronic sensor development was necessary for both system which can connect to the control system of the robot. To clean the system pneumatic air input was applied. As an effect of the local adjustment of the electronic control system optimal flow conditions can be formed what is more favourable comparing to the earlier solutions of cleaning due to the mechanical effect. In the flushing through overpressure air is applied. The air and the cleaning liquid input duration can be adjusted to the local conditions. The electronic control unit can be connected to the electric ircuits of robot.

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A study on the improvement of cleaning performance in bag-filter (여과집진기의 탈진 거동 개선에 관한 연구)

  • Hong, Sung-Gil;Kum, Young-Ho;Shon, Byung-Hyun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.2
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    • pp.1571-1578
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    • 2015
  • The cleaning characteristics of pulse air jet type cleaning system which is widely applied in the industries were identified by utilizing the computational fluid dynamics (CFD) and the cleaning performance in modified shape of dedusting unit was compared in this study. The review on each shape of cleaning part showed that the case of installing the nozzle on the blow tube (Case-3) and the case of installing the double intaking tube to the venturi (Case-4 and Case-5) were more excellent than the structure (Case-1). Also, the optimal venturi shape was designed and examined its applicability to the site in a pilot scale plant. A combined system of a blow tube and a venturi proposed by this study turned out to be very effective for concentrating an cleaning air compared to existing systems, such as using only blow tube and combines the blow tube and venturi. In addition, as a result of installing and testing a venturi proposed by this study, the cleaning frequency and cleaning time were much improved compared to a case of using a commercial venturi that is under use at the industrial sites.

항균처리를 한 공조기기의 항균성능 평가방법과 평가결과

  • Miura, Kunio;Takatsuka, Takesi;Yanagi, U;Yamazaki, Shoji
    • Air Cleaning Technology
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    • v.22 no.2
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    • pp.40-49
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    • 2009
  • Aluminum thin plate coated with epoxy resin containing about 20wt% brass powder, was applied to fins of heat exchanger. We carried out a series of detailed examinations to evaluate the anti-bacterial performance of the plate and heat exchanger (fan coil unit). In the presence of water or moisture, copper ions which have an anti-bacterial ability eluted from brass powder and showed sufficient effects on many kinds of bacteria. We also evaluated the anti-bacterial performance quantitatively by use of the index API (Anti-bacterial Performance Index) which has already been proposed by authors.

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