Prediction of the Energy Consumption for Indoor Strawberry Cultivation in a Tropical Climate

Thiri Shoon Wai, Naoki Maruyama, Yuttana Mona, Chatchawan Chaichana


This article addresses the lack of information for predicting the energy consumption of strawberry plantations inside plant factories located in tropical climate regions. This study aims to investigate the energy consumption of the cultivation of strawberries in the controlled environment room and to develop a TRNSYS computer model for the controlled environment room. Experiments were conducted in a 25 m3 controlled environment room. There are 180 strawberry trees inside the room. Light Emitting Diode (LED) grow light substitutes for natural sunlight. An air conditioner was used to regulate the indoor air condition. A computer model was developed using TRNSYS (TRaNsientSYStem simulation tool) and was validated using the collected data. There are three main components of the room heat load: transmission, lighting, and evapotranspiration. The lighting heat load shares more than 96% of the total heat load — the evapotranspiration load increases when the LED turns on. However, the lighting consumes only about 36% of total electricity consumption, while the air conditioner consumes 64%. Most of the electricity is used during the runner stage. Electricity consumption can be saved by 40% if the runners are grown outside the plant factory. Therefore, the high heat load is a feature in the plant factory. In this study, the lighting heat load is the most significant parameter. The strawberry light intensity requirement is the high lighting heat load. Consequently, the electricity for the air conditioner becomes high since the air conditioner removes the generated heat from the high light intensity. Therefore, the air conditioner electricity consumption is enormous in this study. Moreover, the required lighting intensity, photoperiod, and low air temperature factors affect electricity consumption. Therefore, the results from this study could provide strategies for energy cost reduction and plantation management for plant factories cultivation.


Keywords: controlled environment room, strawberry, TRNSYS, plant factory, energy consumption.


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TSILINGIRIDIS G. Greenhouses: Heating or Cooling? Aristotle University of Thessaloniki, Thessaloniki, 2016.

GHOULEM M., EL MOUEDDEB K., NEHDI E., BOUKHANOUF R., and KAISER CALAUTIT J. Greenhouse design and cooling technologies for sustainable food cultivation in hot climates: Review of current practice and future status. Biosystems Engineering, 2019, 183: 121–150.

SHAMSHIRI R. R., KALANTARI F., TING K. C., THORP K. R., HAMEED I. A., WELTZIEN C., AHMAD D., and SHAD Z. M. Advances in greenhouse automation and controlled environment agriculture: A transition to plant factories and urban agriculture. International Journal of Agricultural and Biological Engineering, 2018, 11(1): 1–22.

PRITTS M., HANDLEY D., and WALKER C. Strawberry production guide: For the Northeast, Midwest, and Eastern Canada. Northeast Regional Agricultural Engineering Service, College Park, 1998.

HUSAINI A. M., & NERI D. Strawberry Growth, Development and Diseases. CAB International, Boston, 2016.

KOZAI T., TAKAGAKI M., and GENHUA N. Plant Factory: An Indoor Vertical Farming System for Efficient Quality Food Production. Academic Press, 2016.

HANCOCK J. F. Strawberries. 2nd ed. Oxford University Press, Oxford, 2020.

TANG Y., MA X., LI M., and WANG Y. The effect of temperature and light on strawberry production in a solar greenhouse. Solar Energy, 2020, 195: 318–328.

GRAAMANS L., VAN DEN DOBBELSTEEN A., MEINEN E., and STANGHELLINI C. Plant factories; crop transpiration and energy balance. Agricultural Systems, 2017, 153: 138–147.

HARBICK K., & ALBRIGHT L. D. Comparison of energy consumption : Greenhouses and plant factories. Proceedings of the VIII International Symposium on Light in Horticulture, 2016, pp. 285–292.

GRAAMANS L., BAEZA E., VAN DEN DOBBELSTEEN A., TSAFARAS I., and STANGHELLINI C. Plant factories versus greenhouses: Comparison of resource use efficiency. Agricultural Systems, 2018, 160: 31–43.

KANOGLU M., & CENGEL Y. A. Energy Efficiency and Management for Engineers. McGraw Hill, New-York, 2005.

ALLEN R. G., PEREIRA L. S., RAES D., and SMITH M. Crop evapotranspiration —guidelines for computing crop water requirements. In: FAO Irrigation and Drainage Paper 56. Food and Agriculture Organization, Rome, 1998.


PIRES R. C. D. M., FOLEGATTI M. V., PASSOS F. A., ARRUDA F. B., and SAKAI E. Vegetative growth and yield of strawberry under irrigation and soil mulches for different cultivation environments. Scientia Agricola, 2006, 63(5): 16–19.

CHOAB N., ALLOUHI A., EL MAAKOUL A., KOUSKSOU T., SAADEDDINE S., and JAMIL A. Effect of Greenhouse Design Parameters on the Heating and Cooling Requirement of Greenhouses in Moroccan Climatic Conditions. IEEE Access, 2021, 9: 2986–3003.

HORTIBIZ DAILY WORLD NEWS. Essentials for growing hydroponic strawberries. 2019.

CHAICHANA C., CHANTRASRI P., WONGSILA S., WICHARUCK S., and FONGSAMOOTR T. Heat load due to LED lighting of in-door strawberry plantation. Energy Reports, 2020, 6: 368–373.

RASHEED A., KWAK C. S., KIM H. T., and LEE H. W. Building energy an simulation model for analyzing energy saving options of multi-span greenhouses. Applied Sciences, 2020, 10(19): 1–23.

WEIDNER T., YANG A., and HAMM M. W. Energy optimisation of plant factories and greenhouses for different climatic conditions. Energy Conversion and Management, 2021, 243: 114336.

SHARMA R. M., YAMDAGNI R., DUBEY A. K., and PANDEY V. Strawberries: Production, Postharvest Management and Protection. CRC Press Taylor & Francis Group, Boca Raton, 2019.

WORLDDATA. Climate and temperature development in Thailand.


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