×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Fan/Wind/Air to Cool Water

Fan/Wind/Air to Cool Water

Fan/Wind/Air to Cool Water

(OP)
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 using a fan or air pressure of some short to do this.  The only question I had is how do I determine the pressure or amount of "wind" that I'll need to obtain the temperature drop?

My initial test was to dispense 3 ounces at 70dC and then have room temperature water dispensed into the 70dC water.  In my two attempts at this, I got the temperature in the cup down to 44dC and 47dC, but am still off by a bit.  I was thinking that if I introduced air of some sort into the flow of room temperature water, that I'd be able to have the final water temp drop the 5-10dC that I'm looking for.

Does anyone have any insight as to how I'd go about calculating the amount of cooling that I'd need to get to the desired temperature?

Thanks so much!!

RE: Fan/Wind/Air to Cool Water

(OP)
So the ~250 W would still be the answer I'm looking for?

RE: Fan/Wind/Air to Cool Water

Vig you really don't seem to have a good grasp of the concept of what heat is, and how it differs from temperature. I suggest you read the chapter on heat in a basic physics text. There are also plenty of on-line resources (other than asking questions here). There is no substitute for taking the time to study the basics.

Maybe you should just consider the benefit of a few ice cubes to solve your problem.  

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources