A REVIEW ON EFFECT OF WIND LOADING ON NATURAL DRAUGHT HYPERBOLIC COOLING TOWER

Abstract

This paper deals with the study of two cooling towers of 200m high above ground level. Cooling tower is a
device which converts hot water into cold water due to direct air contact. It works on the temperature difference between
the air inside the tower and outside the tower.Natural draft cooling tower is one of most widely used cooling tower.
Hyperbolic shape of cooling tower is usually preferred because of its strength and stability and large available area at
the base due to shape. As it is very important structure in nuclear and chemical plants, it should be continuously assessed
for its stability under self-weight, and lateral loads like wind load and earthquake load. Therefor cooling towers have
been analyses for wind load by assuming fixity at the shell base. The wind loads on these cooling towers have been
calculated in the form of pressures by using the circumferentially distributed design wind pressu re coefficients as given
in IS: 11504-1985 code along with the design wind pressures at different levels as per IS:875 (Part 3)- 1987 code. These
towers with very small shell thickness are exceptional structures by their sheer size and sensitivity to horizontal loads.