DOI QR코드

DOI QR Code

Experimental Study for The Development of a Blower to Extend The Life of The Impeller and Reduce The Power Cost by Changing the Air Flow

공기흐름 변경으로 임펠러의 수명연장과 전력비 절감을 위한 송풍기 개발을 위한 실험적 연구

  • 김일겸 (강원대학교 기계시스템공학부) ;
  • 박우철 (강원대학교 기계시스템공학부) ;
  • 손상석 (순천향대학교 기계공학과) ;
  • 김용남 (한국송풍기 엔지니어링)
  • Received : 2020.07.17
  • Accepted : 2020.11.06
  • Published : 2020.11.30

Abstract

In this study, the prototype of a blower was designed and made to develop a long-life blower with a volume flow rate of 10,000 ㎥/min with a required total pressure efficiency of 83% or more. Five experimental impellers with various lengths of dust deflectors were manufactured and used for the erosion experiments. The erosion test was conducted by operating for 160 hours in a self-produced closed loop-type erosion test apparatus. A prototype of a model blower was designed, fabricated, and tested. The results revealed a total pressure, air volume flow rate, and efficiency of 690.6 mmAq, 16,243.6 ㎥/min, and 83.6%, respectively, as the result of conversion to a blower based on the measured value of the blower model. The prototype was designed and fabricated as the experimental erosion equipment of the blower. A blower with a dust deflector was developed by performing the erosion experiments under harsh conditions. The blower showed an improved effect of more than 190% based on the wear thickness of the impeller compared to a conventional blower without a dust deflector.

본 연구는 요구되는 전압효율이 83% 이상인 풍량 10,000 ㎥/min급의 장수명 송풍기를 개발하기 위하여 송풍기를 설계·제작하여 송풍기 성능시험과 침식 실험을 통하여 개발품에 대한 성능을 확인하였다. Dust deflector의 영향을 살펴보기 위하여 각기 다른 길이의 Dust deflector를 갖는 5가지의 실험용 임펠러를 제작하여 침식 실험을 수행하였다. 가혹한 조건으로 실험을 수행하기 위하여 침식을 유발하는 분진 대체재로 1kg의 스틸 쇼트 볼(𝛷0.2 mm)을 사용하였다. 자체 제작한 폐루프 타입의 침식 실험 장치에서 160시간 동안 연속으로 가동 운전하여 실험하였다. Dust deflector에 의한 침식성능을 평가하기 위하여 마모두께를 측정하였다. 3차원 스캐너로 침식 실험 전 형상과 침식 실험 후 형상을 스캐닝하여 마모두께를 측정하였다. 모델 송풍기를 설계·제작하여 송풍기 성능을 시험한 결과, 모델 송풍기 측정값을 기준으로 개발 송풍기로의 환산 결과 전압 690.6 mmAq, 풍량 16,243.6 ㎥/min, 효율 83.6 %로 나타났다. 송풍기의 침식 실험 장치를 설계·제작하여 가혹한 조건으로 침식 실험을 수행하여 dust deflector가 부착된 송풍기인 개발 송풍기가 dust deflector가 없는 기존 송풍기에 비하여 임펠러 마모두께를 기준으로 190 % 이상의 개선 효과가 있는 것으로 나타났다.

Keywords

References

  1. Sung-Taek Jeon, Jin-Pyo Cho, "Effect of Pitch Angle and Blade Length on an Axial Flow Fan Performance", Journal of the Korea Academia-Industrial cooperation Society, Vol. 14, No. 7, pp. 3170-3176, 2013. DOI: https://doi.org/10.5762/KAIS.2013.14.7.3170
  2. Jong-Sung Lee, Choon-Man Jang, "Performance Characteristics of the Double-Inlet Centrifugal Blower according to the Shape of an Impeller", Journal of Fluid Machinery, Vol. 17, No. 1, pp. 28-34, 2014. DOI: http://dx.doi.org/10.5293/kfma.2014.17.1.028
  3. Jeong-Seok Kang, Jin-Taek Kim, Cheol-Hyung Lee, Byung-Joon Baek, "A Study on Three-Dimensional Flow Analysis and Noise Source of Sirocco Fan", Journal of the Korea Academia-Industrial cooperation Society, Vol. 19, No. 12, pp. 896-902, 2018. DOI: https://doi.org/10.5762/KAIS.2018.19.12.896
  4. Ho-Sang Jang, Hawon Lee, Se-Yun Hwang, Jang -Hyun Lee, "Numerical Simulation of Erosion Rate on Pipe Elbow Using Coupled Behavior of Fluid and Particle", Journal of Ocean Engineering and Technology, Vol. 31, No 1, pp. 14-21, 2017. DOI: https://doi.org/10.5574/KSOE.2017.31.1.014
  5. Chul Hee Jo, Jun-Ho Lee, Choon-Man Jang, Su-Jin Heang, "Numerical Study for the Influence of Environment Temperature on Offshore Arctic Pipeline and Impingement Erosion Analysis by using Thermal Flow Simulation", Journal of the Korean Society of Marine Engineering, Vol. 39, No. 3 pp. 201-205, 2015. DOI: http://dx.doi.org/10.5916/jkosme.2015.39.3.201
  6. Jae Ho Paek, llkwang Jang, Yong Hoon Jang, "Performance Evaluation of Wall Blower Nozzle using Erosion Analysis", Tribology and Lubricants, Vol. 34, No. 5, pp. 175-182, 2018. DOI: https://doi.org/10.9725/kts.2018.34.5.175
  7. Md Rakibuzzaman, Hyoung-Ho Kim, Kyungwuk Kim, Sang-Ho Suh, Kyung Yup Kim, "Numerical Study of Sediment Erosion Analysis in Francis Turbine", Sustainability, Vol. 11, No. 5, pp. 1423-1431, 2019. DOI: https://doi.org/10.3390/su11051423
  8. KS B 6311, "Testing methods for industrial fans", Korean Standards, 2017.