Would I actually have to have the PCM's "in" the liquid? Couldn't the PCM just be outside of the thin-walled Silicone tubing that the hot water is running through?
Sorry to bring up this old thread again, but I just came up with another idea. What if I used a Phase Change Material (PCM)? I found this material (http://microteklabs.com/pdfs/MPCM-37D%20Product%20Data%20Sheet.pdf) which would put me right in the 35-38°C range and used 1.25g of the PCM (since...
I'm not sure if this is the correct forum to ask this question in, but does anyone know where I can order some Trimethylolethane or Lauric Acid from? I'm looking to get these two phase change materials for a project we're working on at work and haven't had much luck!
Thanks so much for any...
I had another thread started on the topic of cooling water, but I figured I'd start a different one since I'm exploring a whole new avenue.
I'm trying to cool 8 ounces of 70 deg C water down to 38 deg C. I want to do this all in 2 minutes, but with as low a cost as possible. I was thinking of...
I was just thinking of something else with cooling the water. What if I used air, such as a fan, to be blown through the water? What calculations do you think would be necessary to see how much air I'd need to get the to cool the water?
Compositepro - I like that idea, but how long does it take to cool the water for that volume?
bithkits - I heard the same thing from one of the other engineers here yesterday, which kind of gave me second thoughts about that. Also, it seems to be a little more expensive than what we were...
IR - Since I can't open the TEC, how would I go about getting the serpentine path to touch the cold face of the TEC?
Compositepro and macmet - I like those ideas too, so I'm going to give yours and IR's a shot to see which is best for my application! Thanks!
IR - I had one question about your amount of energy it takes to cool the water 32 degrees C. You said it takes 253 W to do so; however, when I do the calculations, I only get ~134 Watts.
Since 4.186 J is needed to drop water by 1dC, I did 4.186*32=133.952. And since 1 watt=1 Joule/1 sec, I...
IR - Thanks for your advice! I totally understand what you mean about running them in series as there won't be much cooling at the start of the maze. I have enough wiggle room to try both configurations, but I'll give the series configuration a shot first...thanks again for all your help...
So when you say face-to-face, should the hot side of one TEC face the cold side of the other TEC while the water tube runs through a "maze" of some sort and just have the TEC's programmed to have the hot side that contacts the water tube activated to heat the initial flow of water that's going...
vpl - that works too, but I'm looking to have it all done at once, so the final product will have 38dC water when you take the cup/bottle/container away.
Well, I think it would probably be needed once every 2-3 hours. I don't have a problem with getting the heat up to 70dC, I just need to find a way to get the end product down to 38dC.
Would a TEC do this for me?
Thanks for all the replies again, guys!
IRstuff - are TE coolers what's used in PCR to get the temperature to drop so quickly? I read about PCR, but didn't see anything relating to TE cooler.
And the container cannot be moved from under the nozzle to a cooler in an alumininum container. I...
