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2019 Vol.61, Issue 4 Preview Page
Relationship Analysis of Reference Evapotranspiration and Heating Load for Water-Energy-Food Nexus in Greenhouse

물-에너지-식량 넥서스 분석을 위한 시설재배지의 기준작물증발산량과 난방 에너지 부하 관계 분석

Kwihoon Kima
,
Pureun Yoonb
,
Yoonhee Leeb
,
Sang-Hyun Leec
,
Seung-Oh Hurd
,
Jin-Yong Choie†
김 귀훈a
,
윤 푸른b
,
이 윤희b
,
이 상현c
,
허 승오d
,
최 진용e†
aMS Student, Department of Rural Systems Engineering, Seoul National University
bPhD Student, Department of Rural Systems Engineering, Seoul National University
cResearcher, Research Institute for Humanity and Nature
dAgricultural Researcher, Division of Climate Change and Agroecology, Department of Agricultural Environment, National Institute of Agricultural Sciences (NAS), Rural Development Administration (RDA)
eProfessor, Department of Rural Systems Engineering, Research Institute of Agriculture and Life Sciences, Institute of Green Bio Science and Technology, Seoul National University
a서울 대학교 농촌 시스템 공학과 석사 과정
b서울 대학교 농촌 시스템 공학과 박사 과정 학생
c인류 자연 연구소 연구원
d국립 농업 과학원 (NAS), 농촌 진흥청 (RDA), 농업 환경부 기후 변화 농업학과 농업 연구원
e서울 대학교 녹색 생명 과학 연구소 농생명 과학 연구원 농촌 시스템 공학과 교수
† Corresponding author Tel.: +82-2-880-4583 Fax.: +82-2-873-2087 E-mail: iamchoi@snu.ac.kr
2019. pp. 23-32
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Abstract

Increasing crop production with the same amount of resources is essential for enhancing the economy in agriculture. The first prerequisite is to understand relationships between the resources. The concept of WEF (Water-Energy-Food) nexus analysis was first introduced in 2011, which helps to interpret inter-linkages among the resources and stakeholders. The objective of this study was to analyze energy-water nexus in greenhouse cultivation by estimating reference evapotranspiration and heating load. For the estimation, this study used the physical model to simulate the inside temperature of the agricultural greenhouse using heating, solar radiation, ventilated and transferred heat losses as input variables. For estimating reference evapotranspiration and heating load, Penman-Monteith equation and seasonal heating load equation with HDH (Heating Degree-Hour) was applied. For calibration and validation of simulated inside temperature, used were hourly data observed from 2011 to 2012 in multi-span greenhouse. Results of the simulation were evaluated using R2, MAE and RMSE, which showed 0.75, 2.22, 3.08 for calibration and 0.71, 2.39, 3.35 for validation respectively. When minimum setting temperature was 12℃ from 2013 to 2017, mean values of evapotranspiration and heating load were 687 mm/year and 2,147 GJ/year. For 18℃, Mean values of evapotranspiration and heating load were 707 mm/year and 5,616 GJ/year. From the estimation, the relationship between water and heat energy was estimated as 1.0~2.6 GJ/ton. Though additional calibrations with different types of greenhouses are necessary, the results of this study imply that they are applicable when evaluating resource relationship in the greenhouse cultivation complex.

Keywords
Water-Energy-Food Nexus
greenhouse
temperature simulation
evapotranspiration
heating load
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Information
  • Publisher :The Korean Society of Agricultural Engineers
  • Publisher(Ko) :한국농공학회
  • Journal Title :Journal of Korean Society of Agricultural Engineers
  • Journal Title(Ko) :한국농공학회논문집
  • Volume : 61
  • No :4
  • Pages :23-32
  • Received Date : 2019-05-10
  • Revised Date : 2019-05-15
  • Accepted Date : 2019-05-27
  • DOI :https://doi.org/10.5389/KSAE.2019.61.4.023
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