Cooling Tower

Pump/fan, yes, depends.

The solution may be to add more cooling capacity.

"Does water temp depends on season?" What water temp, incoming or out going?

Ambient temp will have an effect on water temp.

Are you just recently experiencing a problem?

Has more heat generating equipment been added to the cooling tower recently?

Has the cooling tower been maintained properly? When was the last time it was cleaned?

Start with the simplest solution, make sure the cooling tower is functioning properly.

relative humidity accounts for most of the cooling. heat is drawn off by the evaporating water

yes, increasing air flow will increase cooling

In cooling towers water is allowed to get in direct contact with air displaced by cooling tower fan for cooling. Here, latent heat transfer is more important than the sensible heat transfer. For a given flow rate of water at particular initial temperature, the drop in temperature depends on:

1. Relative Humidity of air. Less the RH more the cooling. Air leaving after contact with water is 100% RH. Latent Heat of water vapourised is taken away from water and is proportional to difference in RH.

2. Temperature of air. Lower the temperature, more sensible cooling. If air temperature is more than water, it may cause sensible heating but its negligible compared to latent heat.

3. Rate of air displaced by cooling tower fan. Increase in rpm of cooling tower fan will increase this.

i've already said the same thing in a more understandable way. i'm sure you're smart enogh that you don't need to repeat what some one has already said. that's way too easy

i have commented to your post twice, but i should add that the easiest way to determine how efficent the cooling tower is by how much water is evaporating in the tower. monitor how much water that needs replacing in the cooling system. the more water loss, the more efficent the cooling.

Thanks jlstitt, for reminding. In fact I thought that same thing can be explained in a more understandable way. But your view is just opposite. Any way its so simple things, any one can understand. I shouldn't have spent my time for it, like explaining to new students. But I wondered, you took over two months to comment on it.

been busy

here in the USA, most men hate to take driving directions from a female bacause they seem to give a person way too much information. it takes them an hour just to tell you to make a left turn at the next stop light. it's confusing as hell.

OT. pritam has definitely added value to your comments which were in tit-bits. Its an irritating reaction, uncalled far, even after a sober comment.