JAEST LOGO

Authors

Toufik Arrif1 Université Mohamed Khider Biskra, Laboratoire de Génie Energétique et Matériaux (LGEM), Faculté des Sciences et de la Technologie, Biskra 07000, Algeria Author
Adel Benchabane Université Mohamed Khider Biskra, Laboratoire de Génie Energétique et Matériaux (LGEM), Faculté des Sciences et de la Technologie, Biskra 07000, Algeria Author
Abdelmadjid Chehhat Abbess Laghrour University of Khenchela, Faculty of Science and Technology, Department of mechanical engineering, 40000 Khenchela, Algeria Author
Abdelfetah Belaid Unité de Recherche Appliquée en Energies Renouvelables, URAER, Centre de Développement des Energies Renouvelables, CDER, 47133, Ghardaïa, Algeria Author
Amar Rouag Université KasdiMerbah Ouargla, Laboratoire de développement des Energies Nouvelles et Renouvelables dans les Zones Arides et Sahariennes, LENREZA, BP 511, Ouargla 30000, Algeria Author

DOI:

https://doi.org/10.69717/jaest.v4.i2.74

Keywords:

Convective losses, Natural Convection, Helical tube, Solar Receiver, Concentrating Solar Power Plants

Abstract

In this paper, natural convection heat losses in a cylindrical solar receiver areinvestigated numerically. The study is conducted using three helical tube diameters: 12mm,16mm and 25mm. The diameter of the receiver is 0.3 m with an aspect ratio equal to one andthree aperture ratios of 1, 0.75 and 0.5. In each case, the receiver tube inside the cylindricalcavity is modelled by a helical spiral similar to those of real systems. The simulations areperformed for three inlet temperatures (of 50, 75 and 100°C) and four receiver tilt angles (of 0,30, 60 and 900) with a constant mass flow rate of 0.0885 kg/s. The effects of some parameterssuch as receiver size, boundary conditions, tube diameter, receiver tilt, inlet temperature andopening ratio on convective heat losses and outlet temperature are presented in form of graphs.It has been found that the convective heat losses are reduced by using the adiabatic boundarycondition imposed on the half-circumference of the tube. Thus, increasing the helical tubediameter causes an increasing in the convective heat losses. The increasing of the fluidtemperature and the opening ratio are found proportional to the increasing of convective heatlosses.

Downloads

Download data is not yet available.

Downloads

Published

2018-06-27

Issue

Section

Research Paper

How to Cite

Numerical simulation of convective heat losses in a helical tube of a cylindrical solar receiver. (2018). Journal of Applied Engineering Science & Technology, 4(2), 11. https://doi.org/10.69717/jaest.v4.i2.74