• Title/Summary/Keyword: Industrial Fan

Search Result 223, Processing Time 0.03 seconds

A Study on Vibration Reduction of an Industrial Fan (산업용 송풍기의 진동저감에 관한 연구)

  • 송승훈;김회룡;정진태
    • Journal of KSNVE
    • /
    • v.10 no.3
    • /
    • pp.457-464
    • /
    • 2000
  • Vibrations of a fan are often generated by mechanical unbalance magnetic force and air flow. These vibrations depend on the design of a fan the machining accuracy of each element and assembled conditions. An experimental study is carried out to reduce the vibration and noise of an industrial fan in this paper. In order to identify the vibration sources of a fan the signal analysis and system analysis are performed, It is shown that the industrial fan studied in this paper has a natural frequency at 144 Hz and resonance occurs when the running speed of the fan is 1750 rpm. The results may be helpful to design a fan with low vibration and noise.

  • PDF

Experimental and Numerical Studies on the Flow Characteristics of a Fan-Sink (팬싱크의 유동 특성에 관한 실험 및 수치해석적 연구)

  • Lee Kyoung-Yong;Choi Young-Seok;Yun Jae-Ho
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
    • /
    • v.18 no.3
    • /
    • pp.225-230
    • /
    • 2006
  • The overall performance and local flow fields of the fan, heat sink, and fan-sink were experimentally and numerically studied to investigate the flow characteristics of a fan-sink. The flow resistance of the heat sink was measured by small fan tester based on AMCA standards and compared with the CFD results to select available cooling fan for the fan-sink. The nonuniform velocity profile behind the fan outlet was shown by the flow visualization. The effects of nonuniform velocities on the performance of heat sink were discussed. To validate the commercial CFD code CFX-5.6, the predicted performance curve was compared with that of fan testing. The local flow fields of the fan-sink were analyzed by CFD results. MFR (multiple frame of reference) was used as a computational model combining rotating fan and stationary heat sink. Through the CFD results of the fan-sink, the flow patterns behind the fan outlet influenced the flow resistance and overall performance of the heat sink.

Performance Improvement of High Speed Jet Fan

  • Choi, Young-Seok;Kim, Joon-Hyung;Lee, Kyoung-Yong;Yang, Sang-Ho
    • International Journal of Fluid Machinery and Systems
    • /
    • v.3 no.1
    • /
    • pp.39-49
    • /
    • 2010
  • In this paper, a numerical study has been carried out to investigate the influence of jet fan design variables on the performance of a jet fan. In order to achieve an optimum jet fan design and to explain the interactions between the different geometric configurations in the jet fan, three-dimensional computational fluid dynamics and the DOE method have been applied. Several geometric variables, i.e., hub-tip ratio, meridional shape, rotor stagger angle, number of rotor-stator blades and stator geometry, were employed to improve the performance of the jet fan. The objective functions are defined as the exit velocity and total efficiency at the operating condition. Based on the results of computational analyses, the performance of the jet fan was significantly improved. The performance degradations when the jet fan is operated in the reverse direction are also discussed.

Fan Case Design using Energy Conversion Ideal Function Based Taguchi Dynamic Characteristics (에너지 전환 이상기능 기반 다구찌 동특성을 활용한 Fan Case 설계)

  • Ji, Soo Yoon;Jang, Joong Soon
    • Journal of Korean Institute of Industrial Engineers
    • /
    • v.41 no.1
    • /
    • pp.97-104
    • /
    • 2015
  • An electric-motor which uses electric energy to dry laundry in a dryer generates wind by rotating a fan. The roles of electric motor and fan are crucial for drying. To reduce the noises or vibration, their performances should be improved. However, it requires a relatively high cost to redesign them. In this case, redesigning the fan case rather than the motor or the fan would be easier and cheaper. This paper is to apply Taguchi dynamic characteristic concept with the ideal function of energy conversion to redesign the fan case. Not only the increase of the wind power but also the decrease of noise, vibration and the other side effects are resulted.

Development of Fan Stall Warning Equipm4ent (송풍기 맥동 감시 장치 개발)

  • Cho, Hyun-Seob
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.9 no.4
    • /
    • pp.924-928
    • /
    • 2008
  • In this paper, The fan stall guard system of boiler airing system of the class of 500MW capacity to protect fan. But because confidence is loosed and operation is influenced by frequent fault of fan stall guard system, confidence is improved by substituting DCS Logic for it.

Development of high performance and efficiency plastic axial fan by proximity cooling mold to minimize warpage (휨 변경 최소화 근접 냉각 금형을 통한 고성능 고효율 플라스틱 축류팬 개발)

  • Shin, Kwang-Ho;Kim, Mi-ae;Chea, Bo-Hae;Park, Sang-Wook;Kim, Yong-Dae
    • Design & Manufacturing
    • /
    • v.13 no.1
    • /
    • pp.61-67
    • /
    • 2019
  • The cooling unit of the industrial showcase consists of a compressor, a condenser and an evaporator. An axial fan is used to circulate the air to improve the efficiency of the heat exchanger. In the past, aluminum fans have been used, which have problems such as low performance, efficiency, high failure rate, and high noise. This study is to develop high performance, high efficiency plastic fan replacing aluminum fan. A major factor in determining the performance and noise of an axial fan is the angle and cross-sectional shape of the blade, which is suitable for raising the lift force, thereby controlling the vortex, which is the main cause of noise and performance degradation. In order to produce a high efficiency injection molded fan, it is necessary to develop a mold that minimizes the deformation of the injection process for the designed shape. In this study, we developed a high efficiency, low noise plastic injection fan with more than 11% performance improvement and noise reduction compared to conventional aluminum fan.

The Development of Turbo-Fan Blade for KTX (KTX용 터보팬 블레이드 개발)

  • Jang, Young-Min;Kwon, O-Woon;Kim, Sung-Joon
    • Journal of Industrial Technology
    • /
    • v.29 no.B
    • /
    • pp.41-45
    • /
    • 2009
  • The new cooling fan for various parts & equipments of KTX is developed and evaluated to improve fan performance and durability. The characteristic curve of the developed fan is obtained according to KSB 6311 of performance test regulation. 70 degree of the installation angle of blade makes the fan to produce a maximum flow rate. This angle is found out through trial-error and is confirmed through the verification test. In order to improve the blade strength, the blade is produced by a draw forming. The adoption of AL50 reduces a fan weight by 6 kg. The new blade makes a static pressure 170 (mmAq), a discharge rate $140(m^3/min)$, a rotational speed 2886 (rpm) at the power 10 kw. which results 54% of the static pressure improvement relative to the original blade.

  • PDF

A Study of Fan Stall Warning System Motion Characteristics (축류형 송풍기 운전 특성에 관한 연구)

  • Cho, Hyun-Seob
    • Proceedings of the KAIS Fall Conference
    • /
    • 2006.11a
    • /
    • pp.191-194
    • /
    • 2006
  • 500MW급 대용량 보일러 통풍계통의 Fan Stall 감시 장치는 Fan 이상 발생시 Fan을 보호하기 위하여 정지시키는 기능을 한다. 그러나 Fan Stall 감시 장치의 빈번한 고장으로 신뢰성이 저하되고 운전에 영향을 미치므로 이것을 DCS Logic으로 구성하여 신뢰성을 향상시켰다.

  • PDF

Apparatus for Measuring Fan Stall of Boiler for Power Station (화력발전용 보일러의 맥동 측정 장치)

  • Cho, Hyun-Seob
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.15 no.3
    • /
    • pp.1681-1684
    • /
    • 2014
  • In this paper, in the ventilation system of coal-fired power boilers can measure in real time the fan stall mechanism is all about. The fan stall guard system of boiler airing system of the class of 500MW capacity to protect fan. But because confidence is loosed and operation is influenced by frequent fault of fan stall guard system, confidence is improved by substituting DCS Logic for it.

Fan Stall Warning System Design Using the DCS Logic(I) (분산제어 설비를 이용한 Fan Stall Warning System 설계(I))

  • Roh, Yong-Gi;Cho, Hyeon-Seob;Jang, Sung-Whan
    • Proceedings of the KAIS Fall Conference
    • /
    • 2006.05a
    • /
    • pp.236-239
    • /
    • 2006
  • 500MW급 대용량 보일러 통풍계통의 Fan Stall 감시 장치는 Fan 이상 발생시 Fan을 보호하기 위하여 정지시키는 기능을 한다. 그러나 Fan Stall 감시 장치의 빈번한 고장으로 신뢰성이 저하되고 운전에 영향을 미치므로 이것을 DCS Logic으로 구성하여 신뢰성을 향상시켰다.

  • PDF