TP25-17 Direct Drive CoolingThe promise of direct drive cooling tower fans with Permanent Magnet (PM) motors is not new, but so far this approach has not seen significant adoption. This paper reviews the advantages of direct drive and the requirements for successful direct drive implementation, including performance and economic gaps that have impeded adoption. Efficient torque at the low speeds required for direct drive has been a critical constraint. Crossing this gap can be

demonstrating how the advantages of the new inhibitor will provide cost

The bane of cooling towers

Atomic absorption analysis

lower weight and corrosion resistance

Surface blisters were noticed in two of the new towers after 2 to 18 months of operation

Environmental considerations in handling and disposal of asbestos materials will be discussed along with the appropriate interface with regulatory agencies

For this purpose it is crucial to practically verify the intended fan duty point

do not cause other environmental problems

and microbial fouling

The purpose of this paper is to provide a better understanding of axial

System degradation often results

This paper addresses a solution to this problem encompassing initial ideas