Numerical Study of the Heating System and Solar Radiation Effects on Temperature Variations in a Greenhouse with Glass Walls in Winter

Authors

1 Associate Professor, CFD Turbulence and Combustion Research Laboratory, Department of Mechanical Engineering, University of Qom, Iran

2 M.Sc. Student, CFD Turbulence and Combustion Research Laboratory, Department of Mechanical Engineering, University of Qom, Iran

3 Research Assistant, CFD Turbulence and Combustion Research Laboratory, Department of Mechanical Engineering, University of Qom, Iran

Abstract

In some places with hard winters, the heat from sunlight and stored in the soil may not be enough to heat the greenhouse. In such a situation, the additional heat needed must be provided by heating systems. The purpose of this study is to evaluate the effectiveness of the heating system in a glass greenhouse with side air vents and mechanical fans in both night and day periods. In this study, seven different greenhouse designs have been investigated in two periods, day and night. In the daily period, by changing the pressure of the fans, tried to obtain the best condition for providing the appropriate temperature in the greenhouse. Also, in this period, the effect of sunlight on the flow field and temperature changes inside the hall were also investigated. In the night period, the amount of temperature changes by opening and closing the side valves and changing the temperature of the hall floor has been studied. The results of the research show that a greenhouse with a pressure difference of 100 pascal during the day and a greenhouse with a floor temperature of 323.15 K and side vents closed at night have more suitable conditions for growing plants in the off-season.

Keywords

Main Subjects

References

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Iranian Journal of Mechanical Engineering Transactions of ISME
Volume 25, Issue 2 - Serial Number 71
September 2023
Pages 57-79

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History

  • Receive Date: 07 February 2022
  • Revise Date: 14 February 2023
  • Accept Date: 17 June 2023

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