PRE-UPGRADE EXIT AIR MAPPING
AND ENGINEERING ANALYSIS OF COOLING TOWER PERFORMANCE WITH A MOBILE ROBOT
For estimating the local characteristics of cooling towers, i.e. isolation of distribution problems of the fluid, usually measurements of temperature and velocity field in a measuring plane above the water distribution area are implemented. These measurements are normally performed via a diagnostic testing technique known as "exit air mapping", i.e. by mounting a large number of 200 to 400 velocity and temperature sensors, depending on the size of the cooling tower and requirements of the analysis, approximately 1 to 2 m above the water distribution surface.
These measurements are, above all,
time consuming. Furthermore, preparations are linked with halting the
power plant operation. Consequently the above mentioned measurements are
not regularly performed and consumers usually decide for reconstruction
of their cooling towers on the basis of integral characteristics, numerical
modelling and/or insufficient empirical estimations.