Heat Transfer and Fluid Flow in Naturally Ventilated Greenhouses
Journal Title: Engineering, Technology & Applied Science Research - Year 2017, Vol 7, Issue 4
Abstract
In this paper, heat transfer and fluid flow in naturally ventilated greenhouses are studied numerically for tow configuration according to the number and positions of the opening. The equations governing the phenomenon are developed using the stream function-vorticity formalism and solved using the finite volume method. The aim of the study is to investigate how buoyancy forces influence airflow and temperature patterns inside the greenhouse. Rayleigh number is the main parameter which changes from 103 to 106 and Prandtl number is fixed at Pr=0.71. Results are reported in terms of stream function, isotherms and average Nusselt number. It is found that the flow structure is sensitive to the value of Rayleigh number and the number of openings. Also, that using asymmetric opening positions improve the natural ventilation and facilitate the occurrence of buoyancy induced upward cross-airflow inside the greenhouse.
Authors and Affiliations
M. Elashmawy, A. A. A. A. Al-Rashed, L. Kolsi, I. Badawy, N. B. Ali, S. S. Ali
Keywords
Related Articles
- EP ID EP147377
- DOI -
- Views 197
- Downloads 0
A Numerical-Analytical Hybrid Approach for the Identification of SDM Solar Cell Unknown Parameters
Appropriate modeling and accurate parameter identification of solar cells are crucial in the optimization of photovoltaic (PV) systems. The single-diode model (SDM), consisting of an ideal current source, an ideal diode,...
3D Buoyancy Induced Heat Transfer in Triangular Solar Collector Having a Corrugated Bottom Wall
A numerical study of the natural convection heat transfer and fluid flow in 3D triangular solar collector having a corrugated bottom wall has been carried out using finite volume method. The aim of the study is to invest...
Forecasting Wastewater Treatment Results with an ANFIS Intelligent System
Wastewaters caused by industrial and manufacturing production containing pollutants which beside degradation and depletion of natural resources, impose excessive pressure on the Earth's ecosystems and exacerbate water sh...
Ground Water Quality Assessment of Daur Taluka, Shaheed Benazir Abad
The aim of this study was to assess the ground water quality of Daur Taluka of district Shaheed Benazir Abad for drinking purposes. Forty groundwater samples were collected from different locations and brought to Pakista...
Influence of Temperature on Energetic and Rheological Characteristics of PLANTOHYD Bio Lubricants – a Study in the Laboratory
This article presents the results of measuring the calorific value and the rheological characteristics of Plantohyd bio lubricants. Measurements were conducted under laboratory conditions with an IKA C5000 calorimeter an...