Increase of Cooling Capacity of Strawberry Canopy by Evaporative Cooling Together with Air Flow Controlling Under Culture Bench and Cool Water Tube

Main Article Content

ภานุวิชญ์ พุทธรักษา
Sulaksana Mongkon

Abstract

This research aims to study the increase of cooling capacity for the nurture of canopy temperature in strawberry greenhouse that used evaporative cooling systems together with air flow controlling under the culture bench and cool water tube. The greenhouse had 6 m of width, 24 m of length and 4.8 m of height. The roof was covered by polyethylene plastic and insect screen net. On the north wall was installed the cooling pad of 14.04 m2 area. Inside greenhouse had the culture bench that was 0.3 m of width, 21 m of length and 1 m of height. The 50 W of ventilation fans were install every the culture benches. The cool water tube made from aluminum with a diameter of 1.27 cm, length of 21 m and used one return coil between the strawberry bush. The results showed that the air flow controlling could decrease the air temperature around the plant canopy to a maximum of 5.5 oC when compared with non-air flow controlling, and the use of cool water tube could not effect of cooling. For the mathematical model study, it was found that using the faster velocity fan together with the opening width increasing of air flow controlling could reduce the strawberry canopy temperature about 4 - 5 oC and the coefficient of performance increased by 66.12 %.

Article Details

How to Cite
[1]
พุทธรักษา ภ. and S. Mongkon, “Increase of Cooling Capacity of Strawberry Canopy by Evaporative Cooling Together with Air Flow Controlling Under Culture Bench and Cool Water Tube”, RMUTI Journal, vol. 13, no. 1, pp. 37–58, Oct. 2019.
Section
Research article

References

Laknizi, A., Mahdaoui, M., Ben Abdellah, A., Anoune, K., Bakhouya, M., and Ezbakhe, H. (2019). Performance Analysis and Optimal Parameters of a Direct Evaporative Pad Cooling System under the Climate Conditions of Morocco. Case Studies in Thermal Engineering. Vol. 13, pp. 100362. DOI: 10.1016/j.csite.2018.11.013

Xu, J., Li, Y., Wang, R. Z., Liu, W., and Zhou, P. (2015). Experimental Performance of Evaporative Cooling Pad Systems in Greenhouses in Humid Subtropical Climates. Applied Energy. Vol. 138, Issue C, pp. 291-301. DOI: 10.1016/j.apenergy.2014.10.061

Waewsak, J., Kaew-on, J., Kongruang, C., Katathirakol, S., and Nutongkaew, P. (2016). Increasing Productivity and Input Energy Relationship with Mushroom Yield and Economic Analysis of Evaporative and Mist Cooling Greenhouse together with Automatic Solar Ventilation Systems. Thaksin University. (in Thai)

Mehmet, A. D. and Hasan, H. S. (2015). Performance Analysis of a Greenhouse Fan-pad Cooling System: Gradients of Horizontal Temperature and Relative Humidity. Journal of Agricultural Sciences. Vol. 21, pp. 132-143

Romantchik, E., Rios, E., Sanchez, E., Lopez, I., and Sanchez, J. R. (2017). Determination of Energy to be Supplied by Photovoltaic Systems for Fan-pad Systems in Cooling Process of Greenhouses. Applied Thermal Engineering. Vol. 114, pp. 1161-1168. DOI: 10.1016/j.applthermaleng.2016.10.011

Hasan, O. Z., Atilgan, A., Buyuktas, K., and Alagoz, T. (2009). The Efficiency of Fan-pad Cooling System in Greenhouse and Building up of Internal Greenhouse Temperature Map. African Journal of Biotechnology. Vol. 8, No. 20, pp. 5436-5444. DOI: 10.4314/ajb.v8i20.65986

Poolkrajang, A. and Premjai, N. (2010). Efficiency Evaluation of the Direct and Indirect Evaporative Cooling System. Technical Education Faculty, Rajamangala University of Technology Thanyaburi. (in thai)

Abbouda, S. K. and Almuhanna, E. A. (2012). Improvement of Evaporative Cooling System Efficiency in Greenhouses. International Journal of Latest Trends in Agriculture & Food Sciences. Vol. 2, No. 2, pp. 83-89

Salah, H. A., Hassan, E. G., Hassan, F., Mohamed, E., and Samy, E. (2017). Analytical Investigation of Different Operational Scenarios of a Novel Greenhouse Combined with Solar Stills. Applied Thermal Engineering. Vol. 122, pp. 297-310. DOI: 10.1016/j.applthermaleng.2017.05.022

Duffie, J. A. and Beckman, W. A. (1980). Solar Engineering of Thermal Processes. Solar Energy Laboratory, University of Wisconsin-Madison

Desmarais, G., Ratti, C., and Raghavan, G. S. V. (1999). Heat Transfer Modelling of Screenhouses. Solar Energy. Vol. 65, Issue 5, pp. 271-284. DOI: 10.1016/S0038-092X(99)00002-X

Gupta, M. J. and Chandra, P. (2002). Effect of Greenhouse Design Parameters on Conservation of Energy for Greenhouse Environmental Control. Energy. Vol. 27, pp. 777-794

ASHRAE. (2009). ASHRAE 2009 Handbook Fundamentals. Atlanta: American Society of Heating, Refrigerating and Air-conditioning Engineers

Fungthnakul, M. (2012). Reduction of Temperature in Building by Evaporative Cooling. Master Degree of Engineering, Master of Engineering (Energy Engineer) Chiang Mai University. (in Thai)

Akaratiwa, S. and Wongcharee, K. (2011). Thermodynamics: an Engineering Approach. Bangkok: McGraw-Hill Education Thailand. (in Thai)

Kaewwijit, T., Kerdprasop, N., and Kerdprasop, K. (2016). The Improvement of Support Vector Regression to Forecast Time Series. Journal of Science & Technology Mahasarakham University. Vol. 36, Issue 4, pp. 452-458. (in Thai)

Yushi Group Co., Ltd. (2019). Ventilation Fan. Access (15 May 2019). Available (https://www.yushi.co.th/product-category/ventilationfan)