2007-02-27 05:09:44 · 4 answers · asked by Jennifer D 1 in Science & Mathematics ➔ Engineering
cooling tower fans are now come in FRP construction.Naturally ,the current drawn by the motor will be less.
power=cube root 3*(v)*I.Cos phi,
Cos phi=phase angle.
So, it will be cost effective.
Water is corrosive in nature . Over a period of time blade may get corroded and made the system unbalanced which is very unsafe.
Further more, plastic is comparatively cheaper than aluminium alloy.
Wooden lauvers are also getting damaged, plasic lauvers are more durables.So that also leads replacement.
spray nozzles,inside pvc fills(for increasing surface area) are also cheaper.
Handling also more easier.
2007-02-27 07:09:29 · answer #1 · answered by Anonymous · 2⤊ 1⤋
Corrosion issues. Less of an issue with plastics than steel.
2007-02-27 05:26:19 · answer #2 · answered by INNMorris 5 · 0⤊ 0⤋
Corrosion prevention
2007-02-27 05:24:54 · answer #3 · answered by insolver 2 · 1⤊ 1⤋
my guess is because it is cheaper.
2007-02-27 05:17:16 · answer #4 · answered by Mustng0021 5 · 0⤊ 0⤋