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  1. WallaWalla

    Refrigeration using Peltier device

    Sorry, I'm expressed badly. I would like to cool the water in the tank (using a shaker for uniform temperature). Then I had expected the use of a pump to circulate the water inside the next device. Once the water is circulated it would be back in the tank and cooled again. It's a loop. I hope...
  2. WallaWalla

    Refrigeration using Peltier device

    macmet - I should cool the water and then move the water outside of the tank. My first problem is to cool water in the tank with TECs.
  3. WallaWalla

    Refrigeration using Peltier device

    Ok, then what are the math that I need to do correctly? For the Biot number I read some information in your link. I had consider a stirrer for uniform the temperature inside the reservoir.
  4. WallaWalla

    Refrigeration using Peltier device

    macmet My study is about an endovascular device used to induce hypothermia. It is composed by a cvc catheter (central venous catheter) and an external device used to cool the fluid which will flow inside the catheter. Inserting the catheter in a vein (femoral, subclavian or jugular), we can do...
  5. WallaWalla

    Refrigeration using Peltier device

    IRstuff - For the first case (reservoir with fluid inside) I don't think that I have to use the thermal conductivity but the specific heat of the water. macmet - Thank you to describe your experience! I saw (on the web) that exist some water chillers for marine aquariums that uses...
  6. WallaWalla

    Refrigeration using Peltier device

    Thanks, EnergyMix - I started the project at the university but now I will made it myself. IRstuff - Ok, I know that just because my fluid passes by a Peltier cooler doesn't guarantee cooling. But in the first case I have a reservoir and I do the math but I don't know in it is feasible in...
  7. WallaWalla

    Refrigeration using Peltier device

    This is not my homework, but it is my project and before to realize my project I would understand if it is feasible. What do you mean by Time of contact?
  8. WallaWalla

    Refrigeration using Peltier device

    This is the other figure.http://files.engineering.com/getfile.aspx?folder=2084438a-8db8-4419-a473-b4d03935481a&file=Idea_peltier.jpg
  9. WallaWalla

    Refrigeration using Peltier device

    Hello everyone, I'm carrying out a project which provides the cooling of a fluid inside a tube. In particular I should cool water or a glycolytic solution from a temperature of 25 °C to about 0 °C. I thought to do this through the use of the thermoelectric effect, then the Peltier cells. I...
  10. WallaWalla

    Problem Nusselt Number

    Thank to all. In the nest days I will compare the theoretical data with experimental data so as to estimate errors.
  11. WallaWalla

    Problem Nusselt Number

    Thanks, but I had already read these things as I wrote above. In fact, in these document there are some relationship about Forced convection in turbulent pipe flow (Sieder and Tate, Dittus-Boelter ,etc.. ). My question is: I can use these relationships for the concentric annular duct?
  12. WallaWalla

    Problem Nusselt Number

    Hello, I have a question about the calculation of the Nusselt number. In particular, I have to determine this value in a problem inherent a countercurrent heat exchanger and I need to find the value of the heat exchange convection coefficient h. The problem is that I have a concentric annular...

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