EVAPORATIVE COOLING AND TEMPERATURE INSIDE GREENHOUSE UNDER HOT ARID AIR CONDITIONS

Document Type : Original Article

Authors

1 Associate Professor, Agr. Eng. Dept., Fac. Agri. Cairo Uni. Cairo, Egypt

2 currently loaned to the Fac. of Meteorology, Environment and Arid Land Agriculture. KAU, Jeddah, KSA

3 Associate Professor, Fac. Of Meteorology, Environment and Arid Land Agriculture. KAU, Jeddah, KSA

Abstract

The aim of the present work is to study the effect of evaporative cooling system for greenhouse under humid and hot weather.  A gable roof design greenhouse was covered with old fiberglass glazing for more than 15 years was used. The experiment was carried out for 26 days of continuous data measuring, starting from June 8 to July 3 of year 2010 where the highest outside air temperature was obtained. Greenhouse dimension was 24 m. long, 10 m. width and 4 m. height. The results show that the highest difference of about 10-11 oC. was between cooling pad section and outside air temperature. Meanwhile, the lowest temperature differences were 2-6 oC. between middle section of the greenhouse and cooling pad section. The maximum value of sensible heat transfer was 53 kJ/s between outside and evaporative pad.

Main Subjects

References

Abdel-Rahman, G. M. 2005.  Air temperature distribution along two greenhouses with different evaporative cooling materials  . The 13th Ann. Confe. of Misr Soci. of Ag. Eng. : 23, (2),: 167-179.
Ashish Shukla; G.N. Tiwari and M.S. Sodha (2008) “Experimental study of effect of an inner thermal curtain in evaporative cooling system of a cascade greenhouse” Solar Energy, 82, Issue 1,: 61-72
Chung-Min Liao and Kun-Hung Chiu (2002) “Wind tunnel modeling the system performance of alternative evaporative cooling pads in Taiwan region” Building and Environment, 37: 177–187
Dilip Jain (2007) “Development and testing of two-stage evaporative cooler” Building and Environment, 42: 2549–2554
Ganguly, A. and  S. Ghosh  (2007) “Modeling and analysis of a fan–pad ventilated floricultural greenhouse” Energy and Buildings, 39: 1092–1097
 Kumar K.S.; K.N. Tiwari and Madan K. (2009) “Design and technology for greenhouse cooling in tropical and subtropical regions: A review Energy and Buildings 41: 1269–1275
Maerefat M. and A.P. Haghighi (2010) “Natural cooling of stand-alone houses using solar chimney and evaporative cooling cavity Renewable Energy” 35: 2040–2052
Metin Dag tekina; Cengiz Karacab and Yilmaz Yildiz (2009) “Performance characteristics of a pad evaporative cooling system in a broiler house in a Mediterranean climate” Bio-systems engineering, 103: 100-104
Naticchia B.; M.D’Orazio; A.Carbonari and I.Persico (2010) “Energy performance evaluation of a novel evaporative cooling technique” 42: 1926-938
Riangvilaikul, B. and Kumar, S. (2010) “An experimental study of a novel dew point evaporative cooling system” Energy and Buildings, 42: 637–644
Sethi V.P. and S.K. Sharma (2007)  “Survey of cooling technologies for worldwide agricultural greenhouse applications” Solar Energy, 81: 1447–1459
Misr Journal of Agricultural Engineering
Volume 27, Issue 4
October 2010
Pages 1420-1433

Files

Share

How to cite

Statistics