• Title/Summary/Keyword: water-washer

Search Result 24, Processing Time 0.031 seconds

Study on Air Washer using Underground Water in the Subway Stations (지하철 역사 지하수를 이용한 에어와셔에 관한 연구)

  • Kim, Dong-Gyu;Kim, Hoe-Youl;Chung, Yong-Hyun;Kim, Jong-Ryul;Kum, Jong-Soo
    • Journal of Fisheries and Marine Sciences Education
    • /
    • v.22 no.4
    • /
    • pp.604-610
    • /
    • 2010
  • Busan subway transportation system has been established a key role in the society last 20 years. However many people are suffering from hot and humid environment at subway station and platform due to deteriorated ventilation system as well as insufficient air conditioning system in existing stations and platforms. As a result, these systems require revitalization. There is about 5400tons of low temperature underground water is generated from subway stations every day. By using this method and air washer we are trying to lower the temperature. Air washer is commonly used for removing humidity but in this experiment it will be used as air precooling. This research offers result of experiment using air washer system to lower the temperature in large spaces like subway station. The experiment result has shown when L/G was the same, at condition which water spray temperature at $18^{\circ}C$ resulting inlet and outlet temperature difference larger. Also, in the same water spray temperature conditions, larger L/G condition showed a greater temperature difference. LCC evaluation of both system were shown that air washer system of using underground water will save 53% of the initial cost than refrigeration system, and save 75% of operating cost.

A Study on Energy Reduction in an Outdoor Air Conditioning System for Semiconductor Manufacturing Cleanrooms Using Water Spray Humidification (반도체 클린룸용 외기공조시스템의 수분무 가습을 이용한 에너지절감에 관한 연구)

  • Song, Won-Il;Kim, Ki-Cheol;Yoo, Kyung-Hoon;Shin, Dae-Kun;Tae, Kyung-Eung;Kim, Yong-Sik;Park, Dug-Jun
    • Particle and aerosol research
    • /
    • v.13 no.2
    • /
    • pp.65-77
    • /
    • 2017
  • In recent large-scale semiconductor manufacturing cleanrooms, the energy consumption in outdoor air conditioning (OAC) systems to heat, humidify, cool and dehumidify outdoor air(OA) represents about 40~50 % of the total cleanroom power consumption required to maintain cleanroom environment. Therefore, the assessment of energy consumption in outdoor air conditioning systems is essential for reducing the outdoor air conditioning load for a cleanroom. In the present study, an experiment with an outdoor air flow rate of $1,000m^3/h$ was conducted to compare the energy consumption in steam humidification, simple air washer, exhaust air heat recovery type air washer and dry cooling coil(DCC) return water heat recovery type air washer OAC systems. Besides, a numerical analysis was carried out to evaluate the annual energy consumption of the aforementioned four OAC systems. It was shown that the simple air washer, exhaust air heat recovery type air washer and DCC return water heat recovery type air washer OAC systems using water spray humidification were more energy-efficient than the steam humidification OAC system. Furthermore the DCC return water heat recovery type air washer OAC system was the most energy-efficient.

An Experimental Study on Energy Consumption of Air Washer Outdoor Air Conditioning Systems for Semiconductor Manufacturing Clean Rooms (반도체 클린룸용 에어와셔 외기공조시스템의 에너지소비량에 관한 실험적 연구)

  • Kim, Ki-Cheol;Kim, Hyung-Tae;Song, Gen-Soo;Yoo, Kyung-Hoon;Son, Seung-Woo;Shin, Dae-Kun;Park, Dug-Jun
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
    • /
    • v.24 no.4
    • /
    • pp.297-305
    • /
    • 2012
  • In recent large-scale semiconductor manufacturing clean rooms, the energy consumption of outdoor air conditioning systems to heat, humidify, cool and dehumidify incoming outdoor air represents about 45% of the total air conditioning load required to maintain a clean room environment. Therefore, the energy performance evaluation and analysis of outdoor air conditioning systems is useful for reducing the outdoor air conditioning load for a clean room. In the present study, an experiment was conducted to compare the energy consumption of outdoor air conditioning systems with a simple air washer, an exhaust air heat recovery type air washer and a DCC return water heat recovery type air washer. It was shown from the present lab-scale experiment with an outdoor air flow of 1,000 $m^3/h$ that the exhaust air heat recovery type and DCC return water heat recovery type air washer outdoor air conditioning systems were more energy-efficient for the summer and winter operations than the simple air washer outdoor air conditioning system and furthermore, the DCC return water heat recovery type one was the most energy-efficient in the winter operation.

A Study on the Performance Improvement of the Air Washer System for Semiconductor Manufacturing Clean Rooms (반도체 클린룸용 에어와셔 시스템의 성능개선을 위한 연구)

  • Park, Sang-Tae;Yoo, Kyung-Hoon;Son, Seung-Woo
    • Proceedings of the KSME Conference
    • /
    • 2007.05b
    • /
    • pp.3413-3417
    • /
    • 2007
  • In recent semiconductor manufacturing clean rooms, air washers are used to remove airborne gaseous contaminants such as $NH_3$, SOx and organic gases from the outdoor air introduced into clean room. In the present study, an experiment was carried out to examine the improvement of removal efficiency for the gaseous contaminants. In order to improve the gas removal efficiency, a hot water contact heat exchanger was installed upstream of the air washer to heat and humidify the incoming outdoor air before entering the air washer.

  • PDF

Comparison of detergency effectiveness by the type of household washer, detergent and soil - Focused on detergency, rinsing, fabric damage and tanglement - (가정용 세탁기, 세제 및 오염의 종류별 세탁 성능 비교 - 세탁성, 헹굼성, 섬유손상도, 엉킴도를 중심으로 -)

  • Piao, Shujing;Park, Myung-Ja
    • The Research Journal of the Costume Culture
    • /
    • v.21 no.6
    • /
    • pp.950-960
    • /
    • 2013
  • The purpose of this research is to provide accurate information of household washers and detergents for consumers, so that help the producers who make washing machine and detergent to get basic material and also help consumers to choose washing machine. Experiment was proceed with two type of washers to compare energy consumption, washing performance, rinsing effectiveness further, damage caused by entanglement of laundry and fabric was assessed. Detergent P and T were used to compare the performance related to differences of ingredients of detergent. Soiled fabrics of EMPA 108 set were used to evaluate performance of washing by different types of contamination. A summary of experimental results are : First, for the consumption of water, drum-type washer consumed 53% less than pulsator-type washer. On the other hand, the washing time was almost similar for both these machines, but pulsator-type washer showed shorter progress, implying that power saving was more efficient in this case. Second, the drum-type washer showed better performance for contamination with all types of detergent, but the pulsator-type washer showed better rinsing performance. Third, the drum-type washer performed less data of tangle level and fabric damage. Fourth, detergent "P" exhibited better washing performance than did detergent "T", regardless of the type of soil. And with no limit of detergent variety, water-soluble protein soil showed high removal rate, liposoluble soil especially pigment was hardly removed.

The Study on the experimental of a characteristic of temperature and humidity of atomizing water temperature variation in Air Washer (분무수 온도 변화에 따른 에어와셔의 온습도 특성에 관한 실험적 연구)

  • Kim, Tae-Hyung;Nam, Seung-Baeg;Ha, Jong-Pil;Jung, Jae-Hak;Cho, In-Soo
    • Proceedings of the SAREK Conference
    • /
    • 2008.11a
    • /
    • pp.446-451
    • /
    • 2008
  • Air washer remove dust on the air and use for humidification. But the last should be applied to the semiconductor and FPD industry, air washer has focused on removing pollutants. In addition, air washer within the clean room remove the pollutants as well as use for humidification in Winter. However, there is no research in the country, and for research purposes, the evaluation was conducted by atomizing water temperature variation and L/G variation. Performance evaluation results are the same conditions as the entrance of air washers ($23^{\circ}C$, 45%RH). Cooling effect is enhanced when atomizing water temperature is lower. The larger the performance of humidification to L/G lower the temperature increases.

  • PDF

Construction and Testing of a radiation-beam powered TA (ThermoAcoustic) washer for grease removal

  • Chen, Kuan;DaCosta, David H.;Kim, Yeongmin;Oh, Seung Jin;Chun, Wongee
    • Journal of the Korean Solar Energy Society
    • /
    • v.35 no.1
    • /
    • pp.21-28
    • /
    • 2015
  • A small washer powered directly and solely by thermal radiation was constructed and tested to explore the feasibility of using solar energy or other types of thermal radiation for washing and cleaning. In principle, TA (ThermoAcoustic) washers have the benefits of simpler design and operation and fewer energy conversion processes, thus should be more energy efficient and cost less than electric washing/cleaning systems. The prototype TA converter we constructed could sustain itself with consistent fluid oscillations for more than 20 minutes when powered by either concentrated solar radiation or an IR (infrared) heater. The frequencies of water oscillations in the wash chamber ranged from 2.6 to 3.6 Hz. The overall conversion efficiency was lower than the typical efficiencies of TA engines. Change in water temperature had little effect on the oscillatory flow in the TA washer due to its low efficiency. On the other hand higher water temperatures enhanced grease removal considerably in our tests. Methods for measuring the overall conversion efficiency, frictional loss, and grease removal of the TA washing system we designed were developed and discussed.

A Study on a High-Temperature/High-Pressure Washing System in which High-Temperature Water is Generated in a Low-Pressure Boiler and High-Pressure Water is Generated Thereafter in a Compressor (저압보일러에서 고온의 온수 생성 후 압축기에서 고압수를 생성하는 고온·고압 세척시스템에 관한 연구)

  • Cho, Dong-Hyun
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.18 no.1
    • /
    • pp.94-100
    • /
    • 2019
  • This study was conducted on a high-temperature/high-pressure washer in which low-pressure cold water in a boiler is heated to a temperature range of $70{\sim}80^{\circ}C$ by supplying diesel combustion heat. The high-temperature water is sent to a compressor to increase its pressure to 200 bar, thereby making high-temperature/high-pressure water, which is sprayed through a spray nozzle. In the results of this study, the spray temperature of the high-pressure washing was shown to be the highest when the ratio between the actual amount of combustible air and the theoretical amount of air was 1:1 and the energy consumption rate of the low-pressure boiler type high-pressure washer was shown to be much lower than that of the high-pressure boiler type high-pressure washer.

An Experiment on Performance Evaluation of a Vapor Condensation Type Air Washer System for Semiconductor Clean Rooms (반도체 클린룸용 수증기 응축식 에어와셔 시스템의 성능평가)

  • Yeo, Kuk-Hyun;Park, Sang-Tae;Yoo, Kyung-Hoon;Son, Seung-Woo
    • Proceedings of the SAREK Conference
    • /
    • 2006.06a
    • /
    • pp.442-447
    • /
    • 2006
  • In semiconductor manufacturing clean rooms, it becomes important to remove airborne molecular contaminants as well as particulate contaminant in outdoor air introduced into clean rooms. One suitable control technique for these chemical contaminants is air washing by water in an outdoor air handling unit. In order to enhance the removal efficiency of chemical contaminants the effect of adding a heating and humidifying process before an air washer was examined.

  • PDF

Gas removal efficiency of air washer system according to pH of sprayed water (분무수 pH 변화에 따른 에어와셔의 가스제거 성능변화)

  • Nam, Seung-Baeg;Ha, Jong-Pil;Kim, Tae-Hyung;Moon, In-Ho;Cho, In-Soo
    • Proceedings of the SAREK Conference
    • /
    • 2007.11a
    • /
    • pp.488-492
    • /
    • 2007
  • In this study, experiment was done to verify the relationship between sprayed water's pH and gas removal efficiency of the Air Washer system. The experiment was done with sprayed water's pH in between pH 4.7 to 7.7, and Ion Chromatography analysis was used to identify the system's gas removal efficiency. As a result, $NH_3$ is removal efficiency decreased under 50% above pH 7, and $SO_X$ and $NO_X$ removal efficiency decreased under pH 6. Through this research, the optimum pH operating condition of the Air Washer System was conformed to be in range between pH6 to pH6.5.

  • PDF