Optimization of Cooling Load for Different Greenhouse Models in Malaysia

Year 2014, Volume: 4 Issue: 1, 42 - 48, 01.03.2014

Abdulrahman Th. Mohammad Sohif Bin Mat M. S. Alrubaih Abduljalil A. Al-abidi

Abstract

In this paper, the building energy analysis program (DOE-2.1E) is used to investigate the reduction in thermal gains and cooling load for agricultural greenhouse. The greenhouse  located in Kuala Lumpur (latitude =3.12o and longitude = -101.60o) and designed with a modified arch roof type with a length of  6 m, width of 3 m, gutter and gable heights of 2.4 m and 0.6 m, respectively. Three models such as:  (1) an internal, movable 50% shade screen mounted directly above the floor, with a span of 3 m from gutter to gutter; (2) a double envelope roof that is elevated 0.6 m from the ceiling; and (3) an internal, movable shade screen with a double envelope roof have been selected for comparison with the original greenhouse. The comparison is based on thermal gains and cooling load. The results showed that the internal, movable 50% shade screen was found to be the most effective in reducing maximum cooling load requirement (at 14.89%); the double envelope roof models with and without shading reduced maximum cooling load by 10.11 % and 9.39 %, respectively.

Keywords

Greenhouse; cooling load; building energy; DOE.

References

• Dilip Jain, Gopal Nath Tiwari, “Modeling and optimal design of evaporative cooling system in controlled environment greenhouse”, Energy Convers. Manage, vol.43, pp. 2235-2250, February 2002.
• José Pérez-Alonso,Ángel J. Callejón-Ferre, Ángel Carreño-Ortega, Julián Sánchez-Hermosilla, “Approach to the evaluation of the thermal work environment in the greenhouse-construction industry of SE Spain”, Build Environ, vol.46, pp. 1725-1734,March 2011.
• Elisabeth Gratia, Andre´ De Herde, “Greenhouse effect in double-skin façade”, Energy Build, vol.39, pp. 199- , July 2007.
• F. A. Hashem, M. A. Medany, E. M. Abd El-Moniem, M. M. F. Abdallah, “Influence of green-house cover on potential requirements”, Anna. Agricul. Sci, vol.56, pp. 49-55, August 2011. and cucumber water
• Keesung Kim, Jeong-Yeol Yoon, Hyuck-Jin Kwon, Jin- Hee Han, Jung Eek Son, Sang-Woon Nam, Gene A. Giacomelli, In-Bok Lee, “3-D CFD analysis of relative humidity distribution in greenhouse with a fog cooling system and refrigerative dehumidifiers”, Biosyst. Eng, vol. 100, pp. 245-255, May 2008.
• Perdigones, J. L. Garcı´a, A. Romero, A. Rodrı´guez, L. Luna, C. Raposo, S. de la Plaza, “Cooling strategies for greenhouses in summer: Control of fogging by pulse width modulation”, Biosyst. Eng, vol.99, pp. 573-586, March 2008.
• M. Teitel, M. Atias, M. Barak, “Gradients of temperature, humidity and CO2 a long a fan-ventilated greenhouse”, Biosyst. Eng, vol.106, 166-174, April 2010.
• H. Toida, K. Ohyama, T. Kozai, Handarto, M. Hayashi, “A Method for measuring Dry bulb Temperatures during the Operation of a Fog System for Greenhouse Cooling”, Biosyst. Eng, vol.93, pp. 347–351, January 2006.
• N. Katsoulas, T. Bartzanas, T. Boulard, M. Mermier, C. Kittas, “Effect of Vent Openings and Insect Screens on Greenhouse”, Ventilation Biosyst. Eng, vol.93, pp. 427– , March 2006.
• V.P. Sethi, S. K. Sharma, “Greenhouse heating and cooling using aquifer water”, Energy, vol.32, pp. 1414– , December 2007.
• V. P. Sethi, “ On the selection of shape and orientation of greenhouse for composite climates”, Int. J. of Sustainable Energy, vol.28, pp. 45-58, December D. P. Kothari, K. C. Singal , Bakesh Ranjan, Renewable energy sources and emerging technologies. Prentice-Hall of India, New Delhi, 2008.
• Ganguly, S. Ghosh, ”Modeling and analysis of a fan–pad ventilated floricultural greenhouse”, Energy Build, vol.39, pp. 1092-1097, December 2007.
• Wee Fong Lee, Cooling capacity assessment of semi-closed greenhouse, Master degree, Agricultural Biological Engineering. The Ohio State University, 2010.
• K.Kulkarni, P. K. Sahoo, M. Mishra, “Optimization of cooling load for a lecture theatre in a composite climate in India”, Energy Build, vol.43, pp. 1573-1579, March 2011.