Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Cooling Efficiency of Low Pressure Compressed Air Fogging System in Naturally Ventilated Greenhouses

저압 에어포그 시스템을 설치한 온실의 냉방효율

  • 남상운 (충남대학교 지역환경토목학과) ;
  • 김영식 (상명대학교 식물식품공학과) ;
  • 성인모 (충남대학교 대학원 농공학과) ;
  • 고기혁 (충남대학교 대학원 농공학과)
  • Received : 2012.07.10
  • Accepted : 2012.08.23
  • Published : 2012.09.30
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Abstract

In order to derive the efficient utilization of low pressure compressed air fogging system, cooling efficiencies with control types were analyzed through cooling experiments in tomato greenhouses. The control types were set up with temperature control, humidity control, temperature and humidity control, and time control. It showed that the cooling effects were 0.7 to $3.3^{\circ}C$ on average and maximum of 4.3 to $7.0^{\circ}C$, the humidification effects were 3.5 to 13.5 % on average and maximum of 14.3 to 24.4 %. Both the cooling and humidification effect were the highest in the time control method. The cooling efficiency of the air fogging system was not high with 8.3 to 27.3 % on average. However, the cooling efficiency of 24.6 to 27.3 % which appears from the time control is similar to the cooling efficiency of high pressure fogging system experimented in Japan. The air fogging system is operated by low pressure, but its efficiency is similar to high pressure. We think because it uses compressed air. From this point of view, we suggest that the air fogging system can get the cooling efficiency of similar levels to that of high pressure fogging system and it will have an advantage from clogging problem of nozzle etc.

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References

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