a query of cooling

[brum]

we've got an industrial chillar system supplying coolers in a room full of servers. We wanted to cool the room further so we added another cooler in the room to pump out more cool air. but the tempreture dint really change.

So then we lowered the tempreture of the chilled water being supplied to the coolers by about 1.5 degree celcius. the room tempreture then droped by about 4 degrees celcius. Why has there been such a big decrease in temp ? or is that normal?

[sungmintd8]

Hows the system work, hopefully evaporation. That would be the easiest explanation. When water evaporates, it takes the heat with it, making the water cooler. I am working on something called a "computer bong". It works on evaporation of the water to cool the water in the waterblocks.

[Xyph]

Because it takes more energy to heat up water than it does to heat air, so, for example, what would amount to a 4 degree increase in the temperature of air would only amount to a 1.5 degree increase in the temperature of water.

 

At least, I'm pretty sure that's how it works.

[sungmintd8]

But he's talking about a drop in temperature, not a raise.

[Xyph]

Yeah, it works the same way the other way round... The water is cooled 1.5 degrees more, so more energy from the air can be transferred to the water.

 

In this case, 4 degrees worth of energy more is transferred from the air, which only amounts to a 1.5 degree raise in the temperature of the water.

 

That's a huge oversimplification obviously, but it's the basic idea.

[sungmintd8]

What type of cooling is it though? It it like a refrigerator or A/C unit. Or one of the old fan systems that worked off evaporation. In a A/C type, or refrigerator, the coolant/water is heated, then rises to the top to lose its heat, which in turn is replaced with cool. It then goes down and cools things down. That is the BASIC process. The fan, I have explain, works off the heat leaving with the water vapor.