10-25: Recent Developments in Motor Technology Allow Direct Drive of LowThis paper is a follow up to a paper presented in 2009 concerning the use of permanent magnet motors for direct drive of cooling tower fans. In the previous paper, the authors presented a case study where an existing tower was retrofitted with a motor of this type. After a year in operation, the motor was removed from service, completely disassembled and inspected to determine how it performed in the harsh environment inside the cooling tower. Both

The company Special Water Europe BV and the KEMA Institute set out to test the effectiveness of the additive the Cool Puck in its laboratory using a small scale test assembly based on the Dutch Standard for assessing the performance of treatment programs for open re-circulating cooling tower water systems

The results create an opportunity to revisit some of the traditionally held views of the expected relationships between the results of the two techniques

The sensitive paper techniques

That paper discusses the various vibration modes that can be generated by the interaction of a fan with the air-cooled installation

This paper will discuss both the approach to the wastewater pretreatment and the chemical treatment used as the cooling tower

Complying with increasingly stringent water discharge limitations has forced a re-examination of current cooling water treatment practices

The evidence of compliance must be by actual test on a shake table

will discuss some of the possible theoretical bases for the known uses of polyelectrolyte as antifoulants in once-through and open recirculating cooling water systems

and formation of horrendous amounts of foam until it was found that these troubles could be minimized by pre-treatment with lime

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Laboratory data is presented to verify the theoretical

but this isn't the only application for velocity probes of this type