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The study on enhanced micro climate of the oyster mushroom cultivation house with multi-layered shelves by using CFD analysis

CFD 분석에 의한 느타리버섯 재배사 환경균일성 향상 연구

  • Lee, Sung-Hyoun (Department of Agricultural Engineering, National Institute of Agricultural Sciences) ;
  • Yu, Byeong-Kee (Department of Agricultural Engineering, National Institute of Agricultural Sciences) ;
  • Lee, Chan-Jung (National Institute of Horticultural and Herbal Science) ;
  • Lim, Yeong-Taek (Taesung S&E, Inc.)
  • 이성현 (국립농업과학원 농업공학부) ;
  • 유병기 (국립농업과학원 농업공학부) ;
  • 이찬중 (국립원예특작과학원 인삼특작부) ;
  • 임영택 ((주)태성에스엔이)
  • Received : 2017.02.01
  • Accepted : 2017.03.20
  • Published : 2017.03.31

Abstract

The oyster mushroom cultivation house typically has multiple layers of growing shelves that cause the disturbance of air circulation inside the mushroom house. Due to this instability in the internal environment, growth distinction occurs according to the area of the growing shelves. It is known that minimal air circulation around the mushroom cap facilitates the metabolism of mushrooms and improves their quality. For the purpose of this study, a CFD analysis FLUENT R16 has been carried out to improve the internal environment uniformity of the oyster mushroom cultivation house. It is found that installing a section of the working passage towards the ceiling is to maintain the internal environment uniformity of the oyster mushroom cultivation house. When all the environment control equipment - including a unit cooler, an inlet fan, an outlet fan, an air circulation fan, and a humidifier - were operated simultaneously, the reported Root Mean Square (RMS) valuation the growing shelves were as follows: velocity 23.86%, temperature 6.08%, and humidity 2.72%. However, when only a unit cooler and an air circulation fan operated, improved RMS values on the growing shelves were reported as follows: velocity 23.54%, temperature 0.51%, and humidity 0.41%. Therefore, in order to maintain the internal environment uniformity of the mushroom cultivation house, it is essential to reduce the overall operating time of the inlet fan, outlet fan, and humidifier, while simultaneously appropriately manage the internal environment by using a unit cooler and an air circulation fan.

버섯의 단위면적당 생산량을 증대시키기 위하여 다단으로 재배되는 버섯재배사는 재배균상이 내부공기의 유동을 막는 장애물로 작용하여 균상의 아래쪽과 위쪽간의 환경차이가 발생한다. 이러한 환경차이 때문에 버섯재배 균상의 위치에 따른 생육차이가 발생한다. 본 연구에서와 같이 버섯재배사 내부에서 버섯이 생육되지 않는 작업통로의 상단에 천장방향으로 대류팬을 설치하여 운용하면 재배사 내부의 공기를 전체적으로 균일하게 유지할 수 있는 것으로 나타났다. 다만, 버섯재배사 내부에 설치된 각종 환경조절장치 즉 유니트쿨러, 입기팬, 배기팬, 대류팬, 가습기 등이 모두 한꺼번에 가동될 때는 버섯재배 균상위의 RMS 값이 속도 23.86%, 온도 6.08%, 습도 2.72%로 나타났다. 하지만 유니트쿨러와 대류팬이 가동될 때는 균상위의 RMS 값이 속도 23.54%, 온도 0.51%, 습도 0.41%로 나타났다. 따라서 버섯재배사의 환경조절을 위한 입기팬, 배기팬과 가습기는 용량이 큰 것을 설치하여 전체적인 가동시간을 줄이고, 유니트쿨러와 대류팬을 조합한 환경관리 방법이 내부 환경의 균일성 향상에 큰 도움이 될 것으로 판단된다.

Keywords

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