Performance Study of a Floricultural Greenhouse Surrounded by Shallow Water Ponds

DOI: https://doi.org/10.14710/ijred.6.2.137-144

Article Info
Submitted: 20-02-2017
Published: 25-06-2017
Section: Articles

In the present paper, an innovative low energy-intensive evaporative cooling system has been proposed for greenhouse application in near-tropical regions dominated by hot climate. The system can operate under dual- ventilation mode to maintain a favourable microclimate inside the greenhouse. A single ridge type un-even span greenhouse has been considered, targeting a few species of Indian tropical flowers. The greenhouse has a continuous roof vent as well as adjustable side vents and is equipped with exhaust fans on top and roll-up curtains on the sides. The greenhouse is surrounded by shallow water ponds outside its longitudinal walls and evaporative surfaces partially cover the free water surface. Inside the pond, low cost evaporative surfaces are so placed that they form air channels.  Thus, outside air flows through the channels formed by the wetted surfaces over the water surface and undergoes evaporative cooling before entering the greenhouse. A simplified theoretical model has been presented in this paper to predict the inside greenhouse air temperature while ambient weather data are used as model inputs. The study reveals that during average radiation periods, the greenhouse can depends solely on natural ventilation and during peak radiation hours fan-induced ventilation is needed to maintain the required level of temperature. It is seen that under dual-ventilation mode greenhouse, temperature can be kept 3-6 oC lower than ambient temperature when saturation effectiveness is 0.7 and with 75% shading.

Article History: Received February 25th 2017; Received in revised form April 14th 2017; Accepted May 4th 2017; Available online

How to Cite This Article: Misra, D. and Ghosh, S. (2017) Performance Study of a Floricultural Greenhouse Surrounded by Shallow Water Ponds. International Journal of Renewable Energy Development, 6(2), 137-144.

https://doi.org/10.14710/ijred.6.2.137-144

Keywords

Greenhouse, Evaporative Cooling, Ventilation, Saturation Effectiveness, Wetted Surface

  1. Debajit Misra 
    Indian Institute of Engineering Science and Technology, Shibpur , India
  2. Sudip Ghosh 
    Indian Institute of Engineering Science and Technology, Shibpur , India

Papadakis, G., Mermier, M., Meneses, J.F., Boulard, T. (1996) Measurement and analysis of air exchange rates in a greenhouse with continuous roof and side openings. Journal of Agricultural Engineering Research, 63, 219–228.

Kittas, C., Boulard, T., Papadakis, G. (1997) Natural ventilation of a greenhouse with ridge and side openings: sensitivity to temperature and wind effects. Transactions of ASAE, 40, 415–425.

Teitel, M., Tanny, J. (1999) Natural ventilation of greenhouses: experiments and model. Agricultural and Forest Meteorology, 96, 59–70.

Roy, J.C., Boulard, T., Kittas, C. and Wang, S. (2002) Convective and Ventilation Transfers in Greenhouses, Part 1: the Greenhouse considered as a Perfectly Stirred Tank. Biosystems Engineering, 83, 1-20.

Jain,D., Tiwari, G.N. (2002) Modeling and optimal design of evaporative cooling system in controlled environment greenhouse. Energy Conversion and Management, 43, 2235–2250.

Shu-zen, L., Young, H.E., Zhang, Y., Xiang-wen, M. (2005) Prediction and analysis model of temperature and its application to natural ventilation multi span greenhouse equipped with insect proof screen. Journal of Zhejiang University Science, 6, 523-529.

Fuchs, M., Dayan, M., Presnov, E.(2006) Evaporative cooling of a ventilated greenhouse rose crop. Agricultural and Forest Meteorology, 138, 203–215.

Ganguly, A. & Ghosh, S. (2007) Modeling and analysis of a fan–pad ventilated floricultural greenhouse. Energy and Buildings, 39, 1092–1097.

Ganguly, A. & Ghosh, S. (2009) Model development and experimental validation of a floriculture greenhouse under natural ventilation. Energy and Buildings, 41, 521–527.

Dayan, J., Dayan, E., Strassberg,Y., Presnov, E. (2004) Simulation and control of ventilation rates in greenhouses. Mathematics and Computers in Simulation, 65, 3-17.

Tiwari, G.N. (2002) Solar Energy-Fundamentals, Design, Modeling and Application. Narosa Publishing.

Tiwari, G. N. Greenhouse Technology for Controlled Environment. (2003) Narosa Publishing House, February, New Delhi, India.