Surplus thermal energy model of greenhouses and coefficient analysis for effective utilization

  • Seung-Hwan Yang Korea Institute of Industrial Technology, Convergence Agricultural Machinery Group. Jeonju 54853
  • Jung-Eek Son Seoul National University, Dept. Plant Sci. / Research Institute for Agriculture and Life Sciences. Seoul 08826
  • Sang-Deok Lee Gyeonggido Agricultural Research & Extension Services, Climate Change Response Team. Hwaseong-si, Gyeonggi-do 18388
  • Seong-In Cho Seoul National University, Dept. Biosyst. Biomat. Sci. Eng. / Research Institute for Agriculture and Life Sciences. Seoul 08826
  • Alireza Ashtiani-Araghi Seoul National University, Dept. Biosyst. Biomat. Sci. Eng. Seoul 08826
  • Joong-Yong Rhee Seoul National University, Dept. Biosyst. Biomat. Sci. Eng. / Research Institute for Agriculture and Life Sciences. Seoul 08826
Keywords: energy balance, energy conservation, environmental control, heat pump, heat storage


If a greenhouse in the temperate and subtropical regions is maintained in a closed condition, the indoor temperature commonly exceeds that required for optimal plant growth, even in the cold season. This study considered this excess energy as surplus thermal energy (STE), which can be recovered, stored and used when heating is necessary. To use the STE economically and effectively, the amount of STE must be estimated before designing a utilization system. Therefore, this study proposed an STE model using energy balance equations for the three steps of the STE generation process. The coefficients in the model were determined by the results of previous research and experiments using the test greenhouse. The proposed STE model produced monthly errors of 17.9%, 10.4% and 7.4% for December, January and February, respectively. Furthermore, the effects of the coefficients on the model accuracy were revealed by the estimation error assessment and linear regression analysis through fixing dynamic coefficients. A sensitivity analysis of the model coefficients indicated that the coefficients have to be determined carefully. This study also provides effective ways to increase the amount of STE.


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Abdel-Ghany AM, Al-Helal IM, 2011. Solar energy utilization by a greenhouse: general relations. Renew Energ 36 (1): 189-196.

Ahmed MA, Ahmad F, Akhtar MW, 2009. Estimation of global and diffuse solar radiation for hyderabad, Sindh, Pakistan. J Basic Appl Sci 5 (2): 73-77.

Al-Mohamad A, 2004. Global, direct and diffuse solar-radiation in Syria. Appl Energ 79 (2): 191-200.

ASAE, 1988. ASAE Engineering Practice. Heating, ventilating and cooling greenhouses; Hahn RH & Rosentreter EE (eds). 35th edition. ASAE, St. Joseph.

Bakker JC, de Zwart HF, Campen JB, 2006. Greenhouse cooling and heat recovery using fine wire heat exchangers in a closed pot plant greenhouse: design of an energy producing greenhouse. Acta Hortic 719: 263-270.

Barclay HJ, 1998. Conversion of total leaf area to projected leaf area in lodgepole pine and Douglas-fir. Tree Physiol 18: 185-193.

Benli H, Durmuş A, 2009. Performance analysis of a latent heat storage system with phase change material for new designed solar collectors in greenhouse heating. Sol Energy 83 (12): 2109-2119.

Bowman GE, 1970. The transmission of diffuse light by a sloping roof. J Agr Eng Res 15 (2): 100-105.

Cabrera FJ, Baille A, López JC, González-Real MM, Pérez-Parra J, 2009. Effects of cover diffusive properties on the components of greenhouse solar radiation. Biosyst Eng 103 (3): 344-356.

Chou SK, Chua KJ, Ho JC, Ooi CL, 2004. On the study of an energy-efficient greenhouse for heating, cooling and dehumidification applications. Appl Energ 77 (4): 355-373.

Critten DL, 1987. Light transmission losses due to structural members in multispan greenhouses under diffuse skylight conditions. J Agr Eng Res 38 (3): 193-207.

Fabrizio E, 2012. Energy reduction measures in agricultural greenhouses heating: envelope, systems and solar energy collection. Energ Buildings 53: 57-63.

Ferreira PM, Faria EA, Ruano AE, 2002. Neural network models in greenhouse air temperature prediction. Neurocomputing 43 (1–4): 51-75.

Gauthier C, Lacroix M, Bernier H, 1997. Numerical simulation of soil heat exchanger-storage systems for greenhouses. Sol Energy 60 (6): 333-346.

Geoola F, Kashti Y, Peiper UM, 1998. A model greenhouse for testing the role of condensation, dust and dirt on the solar radiation transmissivity of greenhouse cladding materials. J Agr Eng Res 71 (4): 339-346.

Hamdan MA, Al-Sayeh AI, Jubran BA, 1992. Solar hybrid heating systems for greenhouses. Appl Energ 41(4): 251-260.

Han JH, Kwon HJ, Yoon JY, Kim K, Nam SW, Son JE, 2009. Analysis of the thermal environment in a mushroom house using sensible heat balance and 3-D computational fluid dynamics. Biosyst Eng 104 (3): 417-424.

Hanan JJ, 1998. Greenhouses advanced technology for protected horticulture. CRC Press, New York.

Hepbasli A, 2011. A comparative investigation of various greenhouse heating options using exergy analysis method. Appl Energ 88 (12): 4411-4423.

Kim MK, Lee CG, Jung SJ, Ryou KH, Suh WM, Yoon YC, Son JE, Lee HW, Nam SW, Cho SM, et al., 1997. Design standards for greenhouse environment, Korea Rural Community Corporation. [In Korean].

Joudi KA, Farhan AA, 2015. A dynamic model and an experimental study for the internal air and soil temperatures in an innovative greenhouse. Energ Convers Manage 91: 76-82.

Lam JC, Hui SCM, 1996. Sensitivity analysis of energy performance of office buildings. Build Environ 31 (1): 27-39.

Lee SH, Ryou YS, Moon JP, Yun NK, Kwon JK, Lee SJ, Kim KW, 2011. Solar energy storage effectiveness on double layered single span plastic greenhouse. J Biosyst Eng 36 (3): 217-222. [In Korean].

Leonidopoulos G, 2000. Greenhouse daily sun-radiation intensity variation, daily temperature variation and heat profits through the polymeric cover. Polym Test 19 (7): 813-820.

Li S, Kurata K, Takakura T, 2000. Direct solar radiation penetration into row crop canopies in a lean-to greenhouse. Agr Forest Meteorol 100 (2-3): 243-253.

Najjar A, Hasan A, 2008. Modeling of greenhouse with PCM energy storage. Energ Convers Manage 49(11): 3338-3342.

Ntinas GK, Fragos VP, Nikita-Martzopoulou CH, 2014. Thermal analysis of a hybrid solar energy saving system inside a greenhouse. Energ Convers Manage 81: 428-439.

Ozgener O, Hepbasli A, 2005. Experimental performance analysis of a solar assisted ground-source heat pump greenhouse heating system. Energ Buildings 37 (1): 101-110.

Papadakis G, Manolakos D, Kyritsis S, 1998. Solar radiation transmissivity of a single-span greenhouse through measurements on scale models. J Agr Eng Res 71 (4): 331-338.

Pavlou G, 1991. Evaluation of thermal performance of water-filled polyethylene tubes used for passive solar greenhouse heating. Acta Hortic 287: 89-98.

Sethi VP, 2009. On the selection of shape and orientation of a greenhouse: Thermal modeling and experimental validation. Sol Energy 83 (1): 21-38.

Sethi VP, Sharma SK, 2008. Survey and evaluation of heating technologies for worldwide agricultural greenhouse applications. Sol Energy 82 (9): 832-859.

Sharma PK, Tiwari GN, Sorayan VPS, 1999. Temperature distribution in different zones of the micro-climate of a greenhouse: A dynamic model. Energ Convers Manage 40 (3): 335-348.

Shukla A, Tiwari GN, Sodha MS, 2006. Thermal modeling for greenhouse heating by using thermal curtain and an earth–air heat exchanger. Build Environ 41: 843–850.

Suh WM, Bae YH, Ryou YS, Lee SH, Yoon YC, 2009. Estimation of surplus solar energy in greenhouse (I) - Case study based on 1-2W type -. J Korean Soc Agr Engineers 51 (5): 79-86.

Taiz L, Zeiger E, 1991. Plant physiology, The Benjamin/Cummings Publ. Co. Redwood City, CA, USA.

Vadiee A, Martin V, 2012. Energy management in horticultural applications through the closed greenhouse concept, state of the art. Renew Sust Energ Rev 16 (7): 5087-5100.

Vadiee A, Martin V, 2013a. Energy analysis and thermoeconomic assessment of the closed greenhouse – The largest commercial solar building. Appl Energ 102: 1256-1266.

Vadiee A, Martin V, 2013b. Thermal energy storage strategies for effective closed greenhouse design. Appl Energ 109: 337-343.

Yang SH, Rhee JY, 2013. Utilization and performance evaluation of a surplus air heat pump system for greenhouse cooling and heating. Appl Energ 105: 244-251.

Yang SH, Lee CG, Lee WK, Ashtiani AA, Kim JY, Lee SD, Rhee JY, 2012a. Heating and cooling system for utilization of surplus air thermal energy in greenhouse and its control logic. J Biosyst Eng 37 (1): 19-27.

Yang SH, Lee CG, Kim JY, Lee WK, Ashtiani AA, Rhee JY, 2012b. Effects of fan-aspirated radiation shield for temperature measurement in greenhouse environment. J Biosyst Eng 37 (4): 245-251.

How to Cite
YangS.-H., SonJ.-E., LeeS.-D., ChoS.-I., Ashtiani-AraghiA., & RheeJ.-Y. (2016). Surplus thermal energy model of greenhouses and coefficient analysis for effective utilization. Spanish Journal of Agricultural Research, 14(1), e0202.
Agricultural engineering