Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Comparative Analysis of Accumulated Temperature for Seasonal Heating Load Calculation in Greenhouses

온실의 기간난방부하 산정을 위한 난방적산온도 비교분석

  • Nam, Sang-Woon (Department of Agricultural and Rural Engineering, Chungnam National University) ;
  • Shin, Hyun-Ho (Department of Agricultural and Rural Engineering, Chungnam National University) ;
  • Seo, Dong-Uk (Institute of Agricultural Science, Chungnam National University)
  • 남상운 (충남대학교 지역환경토목학과) ;
  • 신현호 (충남대학교 지역환경토목학과) ;
  • 서동욱 (충남대학교 농업과학연구소)
  • Received : 2014.07.22
  • Accepted : 2014.08.21
  • Published : 2014.09.30
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Abstract

To establish the design criteria for seasonal heating load calculation in greenhouses, standard weather data are required. However, they are being provided only at seven regions in Korea. So, instead of using standard weather data, in order to find the method to build design weather data for seasonal heating load calculation, heating degree-hour and heating degree-day were analyzed and compared by methods of fundamental equation, Mihara's equation and modified Mihara's equation using normal and thirty years from 1981 to 2010 hourly weather data provided by KMA and standard weather data provided by KSES. Average heating degree-hours calculated by fundamental equation using thirty years hourly weather data showed a good agreement with them using standard weather data. The 24 times of heating degree-day showed relatively big differences with heating degree-hour at the low setting temperature. Therefore, the heating degree-hour was considered more appropriate method to estimate the seasonal heating load. And to conclude, in regions which are not available standard weather data, we suggest that design weather data should be analyzed using thirty years hourly weather data. Average of heating degree-hours derived from every year hourly weather data during the whole period can be established as environmental design standards, and also minimum and maximum of them can be used as reference data for energy estimation.

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References

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