Where Cavitation Begins – Cooling Tower Pumps and Piping

Norm HallPumps, Cooling Towers, Hydronic System Design, Cooling Towers, Piping and Pumps, Monday Morning Minutes, Cooling, Cooling Towers

Last week the R. L. Deppmann Monday Morning Minute defined NPSHR, and ended with the Hydraulic Institute (HI) definition as the absolute pressure that will cause the total head of the pump to be reduced by 3%, due to flow blockage from cavitation”. Of importance is the fact that it does not say that NPSHR is where cavitation begins.

It’s All About Terms! – Cooling Tower Pumps and Piping – Part 1

Norm HallMonday Morning Minutes, Pumps, Cooling Towers, Hydronic System Design, Cooling Towers, Piping and Pumps, Cooling, Cooling Towers

Most cooling tower designs and installations are commissioned without any issues. The few percent of times where problems arise will cause multiple meetings, emails, finger pointing, and added costs. The issues are not caused by bad luck or bad Karma; tower water pumping issues are typically caused by air, dirt, or improper application. [Read more…]