Browse > Article
http://dx.doi.org/10.5389/KSAE.2009.51.5.079

Estimation of Surplus Solar Energy in Greenhouse (I) - Case Study Based on 1-2W Type -  

Suh, Won-Myung (경상대학교 농업생명과학대학 지역환경기반공학과 (농업생명과학연구원))
Bae, Yong-Han (경상대학교 농공학과 대학원)
Ryou, Young-Sun (농촌진흥청 국립농업과학원)
Lee, Sung-Hyoun (농촌진흥청 국립농업과학원)
Yoon, Yong-Cheol (경상대학교 농업생명과학대학 지역환경기반공학과 (농업생명과학연구원))
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.51, no.5, 2009 , pp. 79-86 More about this Journal
Abstract
This research performed to analyze surplus solar energy, which is generated from a greenhouse during daytime, and to make the basic materials for designing thermal energy storage system for surplus solar energy. For this goal, it analyzed the surplus solar energy coming from two types of greenhouse. The results of this research are as per the below: In the case of 1-2W-type greenhouse, this research gave the same temperature and ventilation condition regardless of regions, but it was judged that the quantity of surplus solar energy could be greatly changed, depending on the energy consumed for the photosynthesis and evapotranspiration of crops in the greenhouse, on the heating temperature during daytime and night, on the existence/non-existence of a curtain and its warming effect, and on the ventilation temperature suitable for the overcoming of high temperature troubles or for the optimum cultivation temperature. In the case of a single-span greenhouse, there was a big difference in energy incoming and outgoing by month, but throughout seasons, 85.0 % of the total energy put into the greenhouse was solar energy and the energy input by heating was just 15.0 % of the total. 26.4 % of the total energy input for the greenhouse was used for photosynthesis and evapotranspiration of crops, and 44.2 % of the remaining 73.6 % went out in the form of radiant heat through the surface of the greenhouse. That is, 25.2 % of the total energy loss was just the surplus solar energy. 67.6 % of the total heating energy was concentrically used for 3 months from December to February next year, but the surplus solar energy during the same period was just 19.4 % of the total annual quantity so it was found that the given condition was more restrictive in directly converting the surplus heat into greenhouse heating. Under the disadvantageous circumstance of 3 months from December to February next year, it was possible to supplement 28 % (December) $\sim$ 85 % (February) of heating energy with surplus solar energy.
Keywords
Solar energy; typical meteorological year; KSU greenhouse model; 1-2W type and single-span greenhouse; heating energy; ventilation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Rural Development Administration (RDA), 2008. Technology of operating cost down for agriculture. Suwon, Korea (in Korean)
2 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 University
3 The Korean Solar Energy Society, Korean Typical Meteorological Year. Http://www.kses.re.kr. Accessed 26 Feb. 2009
4 Korea Meteorological Administration (KMA), Electronic Civil Service Center. Http://www.kma.go.kr. Accessed 26 Mar. 2009
5 Kim, H. Y., and J. J. Yee, 2007. Preparation the standard weather data and TAC map for heating and cooling load calculation in the 17-provinces of Korea. Architectural Institute of Korea 23(9):197-204 (in Korean)
6 Ministry for Food, Agriculture, Forestry and Fisheries (MFAFF), 2008a. Production results of vegetable crop in 2007, 52-64. Gwacheon, Korea (in Korean)
7 Suh, W. M., Y. H. Bae, and Y. C. Yoon, 2009b. Thermal behavior of stored heat capacity by rockbed system in greenhouse, Conference and Symposium of the Korean Society for Bio-Environment Control, 18(1):571-574. Jeju, Korea : KSBEC (in Korean)
8 Department of Agricultural Engineering (DAE), 2008. Guide book of energy down to tide over of high oil price. Suwon. Korea (in Korean)
9 Ministry for Food, Agriculture, Forestry and Fisheries (MFAFF), 2008b. Cultural state of floricultural crop in 2007, 3-13. Gwacheon, Korea (in Korean)
10 Suh, W. M., Y. H. Bae, and Y. C. Yoon, 2009a. Power generating performance of photovoltaic power system for greenhouse equipment operation. Conference and Symposium of the Korean Society for Bio-Environment Control, 18(1): 579-582. Jeju, Korea:KSBEC (in Korean)