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한국생물환경조절학회 / v.18, no.3, 2009년, pp.200-207 
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식물생장용 저압챔버 내의 기온, 상대습도 및 압력의 변화
( Variations of Air Temperature, Relative Humidity and Pressure in a Low Pressure Chamber for Plant Growth ) |
| 박종현;김용현; 전북대학교 대학원 생물산업기계공학과;전북대학교 농업생명과학대학 생물산업기계공학과(농업과학기술연구소);
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| 초 록 |
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| This study was conducted to analyze the variations of air temperature, relative humidity and pressure in a low pressure chamber for plant growth. The low pressure chamber was composed of an acrylic cylinder, a stainless plate, a mass flow controller, an elastomer pressure controller, a read-out-box, a vacuum pump, and sensors of air temperature, relative humidity, and pressure. The pressure leakage in the low pressure chamber was greatly affected by the material and connection method of tubes. The leakage rate in the low pressure chamber with the welding of the stainless tubes and a plate decreased by $0.21kPa{cdot}h^{-1}$, whereas the leakage in the low pressure chamber with teflon tube and rubber O-ring was given by $1.03kPa{cdot}h^{-1}$. Pressure in the low pressure chamber was sensitively fluctuated by the air temperature inside the chamber. An elastomer pressure controller was installed to keep the pressure in the low pressure chamber at a setting value. However, inside relative humidity at dark period increased to saturation level.. Two levels (25 and 50kPa) of pressure and two levels (500 and 1,000sccm) of mass flow rate were provided to investigate the effect of low pressure and mass flow rate on relative humidity inside the chamber. It was concluded that low setting value of pressure and high mass flow rate of mixed gas were the effective methods to control the pressure and to suppress the excessive rise of relative humidity inside the chamber. |
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| 키워드 |
| air temperature;leakage rate;low pressure;plant growth chamber;relative humidity; |
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생물환경조절학회지 / v.18, no.3, 2009년, pp.200-207
한국생물환경조절학회
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200935535843628)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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