All Issue

2019 Vol.28, Issue 1 Preview Page
Effects of an Aspirated Radiation Shield on Temperature Measurement in a Greenhouse

강제 흡출식 복사선 차폐장치가 온실의 기온측정에 미치는 영향

Young Kyun Jeong1†
,
Jong Goo Lee1†
,
Sung Wook Yun2
,
Hyeon Tae Kim3
,
Enu Ki Ahn4
,
Jae Seok Seo4
,
Yong Cheol Yoon1*
정 영균1†
,
이 종구1†
,
윤 성욱2
,
김 현태3
,
안 은기4
,
서 재석4
,
윤 용철1*
1Dept. of Agricultural Eng., Gyeongsang National Univ.(Institute of Agriculture and Life Science, GNU), Jinju 52828, Korea
2Dept. of Agricultural Engineering, National Academy of Agricultural Science, RDA, Wanju 54875, Korea
3Dept. of Bio-Industrial Machinery Eng.. Gyeongsang National Univ.(Institute of Agriculture & Life Science), Jinju 52828, Korea
4UBN Corporation, Daegu 42403, Korea
1경상대학교 지역환경기반공학과(농업생명과학연구원)
2국립원예 특작 과학원 시설원예 연구소
3경상대학교 생물산업기계공학과(농업생명과학연구원)
4(주)유비엔

† These authors equally contributed to this work.

*Corresponding author: ychyoon@gnu.ac.kr
31 January 2019. pp. 78-85
PDF XML Citation
Abstract

This study was designed to examine the performance of an aspirated radiation shield(ARS), which was made at the investigator’s lab and characterized by relatively easier making and lower costs based on survey data and reports on errors in its measurements of temperature and relative humidity. The findings were summarized as follows: the ARS and the Jinju weather station made measurements and recorded the range of maximum, average, and minimum temperature at 2.0~34.1°C, -6.1~22.2°C, –14.0~15.1°C and 0.4~31.5°C, -5.8~22.0°C, -14.1~16.3°C, respectively. There were no big differences in temperature measurements between the two institutions except that the lowest and highest point of maximum temperature was higher on the campus by 1.6°C and 2.6°C, respectively. The measurements of ARS were tested against those of a standard thermometer. The results show that the temperature measured by ARS was lower by –2.0°C or higher by 1.8°C than the temperature measured by a standard thermometer. The analysis results of its correlations with a standard thermometer reveal that the coefficient of determination was 0.99. Temperature was compared between fans and no fans, and the results show that maximum, average, and minimum temperature was higher overall with no fans by 0.5~7.6°C, 0.3~4.6°C and 0.5~3.9°C, respectively. The daily average relative humidity measurements were compared between ARS and the weather station of Jinju, and the results show that the measurements of ARS were a little bit higher than those of the Jinju weather station. The measurements on June 27, July 26 and 29, and August 20 were relatively higher by 5.7%, 5.2%, 9.1%, and 5.8%, respectively, but differences in the monthly average between the two institutions were trivial at 2.0~3.0%. Relative humidity was in the range of –3.98~+7.78% overall based on measurements with ARS and Assman’s psychometer. The study analyzed correlations in relative humidity between the measurements of the Jinju weather station and those of Assman’s psychometer and found high correlations between them with the coefficient of determination at 0.94 and 0.97, respectively.

Keywords
Assman’s psychometer
regression analysis
relative humidity
standard thermometer
strawberry culture

본 연구에서는 본 연구실에서 자체적으로 제작한 비교 적 제작이 간편하고 비용이 저렴한 강제 흡출식 복사선 차폐장치(Aspirated Radiation Shield; ARS)로 측정한 실 측 데이터를 바탕으로 장치의 성능과 온도 및 상대습도 의 측정오차에 대하여 보고하고자 연구를 수행하였다. 그 결과를 요약하면 다음과 같다. ARS장치와 진주기상 대에서 측정한 최대, 평균 및 최저온도의 범위는 각각 2.0~34.1°C 및 0.4~31.5°C, -6.1~22.2°C 및 -5.8~22.0°C, -14.1~16.3°C 및 14.0~15.1°C범위로 나타났다. 최대기온 의 최저 및 최고온도에서 각각 1.6°C 및 2.6°C정도 교내 에서 측정한 값이 약간 높게 나타난 것을 제외하면, 두 기관에서 측정한 온도에 큰 차이가 없는 것을 알 수 있 었다. 표준온도계의 측정값과 검증한 결과, ARS장치로 측정한 온도가 표준온도계에 비해 -2.0°C정도 낮거나 1.8°C보다 높게 나타나났다. 표준온도계와 상관분석 한 결과, 결정계수는 0.99정도였다. 팬의 유무에 따른 온도 의 경우, 전체적으로 팬이 없는 경우가 최고, 평균 및 최저온도가 각각 0.5~7.6°C, 0.3~4.6°C 및 0.5~3.9°C정도 높게 나타났다. 그리고 ARS장치와 진주기상대에서 측정 한 일평균 상대습도는 전체적으로 ARS장치로 측정한 값 이 약간 높은 경향이 있고, 특히 상대적으로 6월 27일, 7 월 26일, 29일, 8월 20일에 측정한 값이 각각 5.7%, 5.2%, 9.1% 및 5.8%정도로 다소 높게 나타났지만, 두 기관의 월별 평균치는 2.0~3.0%정도로 미미한 수준이었 다. 또한 ARS장치와 아스만 통풍습도계로 측정한 상대 습도는 전체적으로 -3.98~+7.78%정도의 범위 내에 있는 것으로 나타났다. 진주기상대와 아스만 통풍습도계로 측 정한 상대습도를 상관분석 결과, 결정계수가 각각 0.94 및 0.97정도로써 높은 상관관계를 보였다.

키워드
딸기재배
상관분석
상대습도
아스만 통 풍습도계
표준온도계
References
1
Erell, E., V. Leal, and E. Maldonado. 2005. Measurement of air temperature in the presence of a large radiant fiux: An assessment of passively ventilated thermometer screen. Boundary-Layer Meteorol 134: 181-193.0006-8314
2
Kurzeja, R. 2010. Accurate temperature measurements in a naturally-aspirated radiation shield. Boundary-Layer Meteorol 134: 181-193. 10.1007/s10546-009-9430-20006-8314
10.1007/s10546-009-9430-2
3
Konno, S. and H. Takahashi. 2012. Comparison of temperatures measured by using a natural ventilation radiation shield and an aspirated ventilation radiation shield of AMeDAS ststion. Geographical reports of Tokyo Metropolitan University. 47:39-49.
4
Kwon, S. J., Y. B. Min, J. S. Choi, and Y. C. Yoon. 2012. Performance analysis of photovoltaic system for greenhouse. J. Agric. & Life Sci. 46: 141-150 (in Korean).
5
Nakamura, R. and L. Mahrt. 2005. Air temperature measurement error in naturally aspirated radiation shields. Journal of Atmospheric and Oceanic Technology. 22: 1046-0518. 10.1175/JTECH1762.10739-0572
10.1175/JTECH1762.1
6
Mahajan, R.L., B.M. Fichera, and T.W. Horst. 2005. Mechanically aspirated radiation shields: A CFD and neural netwok design analysis. International Journal of Heat and Mass Transfer. 48:2856-2867. 10.1016/j.ijheatmasstransfer.2005.01.0260017-9310
10.1016/j.ijheatmasstransfer.2005.01.026
7
Ministry of Agriculture , Food and Rural Affairs(MAFRA). 2018a. Greenhouse status for the vegetable grown in facilities and the vegetable productions in 2017. Press release. 2018. http//www.marfa.go.kr (in Korean).
8
Ministry of Agriculture , Food and Rural Affairs(MAFRA). 2017b. Cultivation status of floricultural crop in 2017. Press release. 2018. http//www.marfa.go.kr (in Korean).
9
Richardson, S.J., F.V. Brock, S.R. Semmer and C. Jirak. 1999. Minimizing errors associated with multiplate radiation shields. Journal of Atmospheric and Oceanic Technology. 16: 1862-1872. 10.1175/1520-0426(1999)016<1862:MEAWMR>2.0.CO;20739-0572
10.1175/1520-0426(1999)016<1862:MEAWMR>2.0.CO;2
10
Roh, G.K. and W.M. Suh. 1998. Computerized environmental control in greenhouse. ed. The Korean Society for Hightech Agricultural Facilities. Korea. p.140. (in Korean).
11
Suh, W.M. 1986. Modeling of a greenhouse equipped with a solar rockbed system and with carbon dioxide enrichment. Ph.D. Diss., Manhattan: Kansas State Univ., Manhattan, Kansas. p. 138-149.
12
Thomas, C.K. and A.R Smooth. 2013. An effective, economic aspirated radiation shield for air temperature observation and its spatial gradients. Journal of Atmospheric and Oceanic Technology. 30: 526-537. 10.1175/JTECH-D-12-00044.10739-0572
10.1175/JTECH-D-12-00044.1
13
http//www.me.go.kr/home/web/index.do?menuld=64
14
Yang, J., Q. Liu, W. Dai, and R. Ding. 2017. Fluid dynamic analysis and experimental study of a low radiation error temperature sensor. Physics Letters A. 381: 177-183.
10.1016/j.physleta.2016.11.020
15
Yang, J., Q. Liu, W. Dai, and R. Ding. 2016. A temperature error correction method a naturally ventilated radiation shield. Journal of Atmospheric and Solar-Terrestrial Physics. 149: 40-45. 10.1016/j.jastp.2016.09.0101364-6826
10.1016/j.jastp.2016.09.010
16
Yang, S.H., C.G Lee, J.Y. Kim, W.K. Lee, A.A Araghi, and J.Y. Rhee. 2012. Effects of fan-aspirated radiation shield for temperature measurement in greenhouse environment. J. of Biosystems Eng. 37: 245-251 (in Korean). 10.5307/JBE.2012.37.4.2452234-1862
10.5307/JBE.2012.37.4.245
17
Yoon, Y. C., Y. S. Shin, H. T. Kim, S. B. Bae, J. S. Choi, and W. M. Suh. 2012a. Heating performance of hot water supplyingsystem in greenhouse. J. Bio-Env. Cont. 21: 79-87 (in Korean).
18
Yoon, Y. C., Y. S. Shin, S. B. Bae, H. T. Kim, J. S. Choi, and W.M. Suh. 2012b. Variation of indoor air temperature by using hot water piping in greenhouse. J. Agric. & Life Sci. 46: 179-190 (in Korean).
19
Yoon, Y. C., J. U. Im, H. T. Kim, Y. J. Kim, and W. M. Suh. 2011. Estimation of surplus solar energy in greenhouse based on region. J. Agric. & Life Sci. 45: 135-141 (in Korean).
20
Yoon, Y. C., Y. H. Bae, Y. S. Ryou, S. H. Lee, and W. M. Suh. 2009. Power generating performance of photovoltaic power system for greenhouse equipment operation. J. Bio-Env. Cont. 18: 177-184 (in Korean).
21
Yoon, Y. C., W. M. Suh, and S. G. Lee. 1998. A study on the greenhouse heating performance of heat pump system. Magazine of the KSAE. 40: 94-102 (in Korean).
22
Yun, S. W., M. K. Choi, H. T. Kim, and Y. C. Yoon. 2013a. Performance analysis of photovoltaic power generator by usage battery charge. Protected Hort. Plant Fac. 22: 220-227 (in Korean).
10.12791/KSBEC.2013.22.3.220
23
Yun, S. W., Y. S. Shin, M. K. Choi, H. T. Kim, and Y. C. Yoon. 2013b. Experimental study on the use of solar energy.J. Agric. & Life Sci. 47: 127-134 .(in Korean).
Information
  • Publisher :The Korean Society for Bio-Environment Control
  • Publisher(Ko) :(사)한국생물환경조절학회
  • Journal Title :Protected Horticulture and Plant Factory
  • Journal Title(Ko) :시설원예ㆍ식물공장
  • Volume : 28
  • No :1
  • Pages :78-85
  • Received Date : 2019-01-17
  • Revised Date : 2019-01-27
  • Accepted Date : 2019-01-28
  • DOI :https://doi.org/10.12791/KSBEC.2019.28.1.78
Journal Informaiton Journal of Bio-Environment Control Journal of Bio-Environment Control
Online Submission
  • NRF
  • KOFST
  • crossref crossmark
  • crossref cited-by
  • crossref funder-registry
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close