Determination of Ventilation Openings Ratio in Greenhouses under Mediterranean Climate Conditions

Authors

  • Abdullah Nafi Baytorun University of Cukurova Faculty of Agricultural Department of Agricultural Structure and Irrigation
  • Sait Üstün Kahramanmaraş Sütçü İmam Üniversitesi, Ziraat Fakültesi, Biyosistem Mühendisliği Bölümü, 46040 Kahramanmaraş
  • Adil Akyüz Kahramanmaraş Sütçü İmam Üniversitesi, Ziraat Fakültesi, Biyosistem Mühendisliği Bölümü, 46040 Kahramanmaraş
  • Derya Önder Çukurova Üniversitesi, Ziraat Fakültesi, Tarımsal Yapılar ve Sulama Bölümü, 01250 Adana

DOI:

https://doi.org/10.24925/turjaf.v5i4.409-415.1042

Keywords:

Greenhouse, Natural ventilation, Air exchange coefficient, Shading, Greenhouse climatization

Abstract

Ventilation is one of the methods used to obtain the biological optimal point of environmental factors needed for the plants in greenhouses. In the greenhouses, air change coefficient must be more than 50 h-1 in order to supply effective air ventilation. Temperature differences like air change coefficient can be regarded as a criterion to determine efficiency of ventilation in the greenhouses. In this study, the temperature values were calculated by using energy balance and Bernoulli equation at different ventilation opening ratios (AV/AG) depending on climatic properties in the Mediterranean region (Antalya). If was found that, based on temperature and radiation values of Antalya province, 20% ventilation opening rate is sufficient in the roof area. A temperature difference (∆T) of 1K can be achieved with a 50% shading of radiation and a 20% ventilation opening in June in the Mediterranean region. However, additional cooling is necessary in the greenhouses around noon hours because outdoor temperature is greater than 30°C.

Author Biography

Abdullah Nafi Baytorun, University of Cukurova Faculty of Agricultural Department of Agricultural Structure and Irrigation

Faculty of Agricultural Department of Agricultural Structure and Irrigation

Published

15.04.2017

How to Cite

Baytorun, A. N., Üstün, S., Akyüz, A., & Önder, D. (2017). Determination of Ventilation Openings Ratio in Greenhouses under Mediterranean Climate Conditions. Turkish Journal of Agriculture - Food Science and Technology, 5(4), 409–415. https://doi.org/10.24925/turjaf.v5i4.409-415.1042

Issue

Section

Agricultural Technologies