Computational Study of Effect of Varying Properties of Carbon Dioxide on Convective Heat Transfer in Sub Channels Flow at a Pressure Just Above the Critical Value

Abstract

In all over the world population is rapidly rising day by day so the demand of energy is also increasing day by day. Coal based power plant is not so much generating power which is sufficient for the rising population. The energy which is generating from coal based power plant is not clean and safe. So clean energy would be required for survive human being which is nuclear energy. In this paper computational analysis of flow has been covered in the triangular sub channel of nuclear fuel rod assembly by applying code ANSYS CFX 14, which is generally known as commercial computational fluid dynamics (CFD) code. Numerical investigation are recorded of effect of varying properties of carbon di-oxide on convective heat transfer in sub channels flow at a just above the critical value. Three distinct pressure has been taken out for analysis whose values are 7.59MPa, 8.34MPa & 8.81 MPa. Turbulence model of k–ε. are using for analysis. This model has been carried out for numerical formulation consolidate low Reynolds number. Firstly, the numerical investigation were compared with influence of varying pressure on bulk fluid temperature, wall temperature and coefficient of heat transfer. It can be seen that the influence of buoyancy on turbulence creation and heat transfer in fluids at pressure just above the critical value. Buoyancy parameter which is based on low buoyancy bulk properties is also powerful even under this conditions. It is showing clearly that latest heat transfer correlations are used for such improving coolant accident in reactor. Effect of heat transfer due to supercritical pressure fluids come to be used more and more in latest energy entity applications such as, advanced water-cooled nuclear reactors.