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  1. Wizeman

    Stainless steel vs. cupro-nickel exchangers

    Thanks boo1, So basically if the well water doesn't go above 45 F (7.2 C) year-round and the chlorides stay below 1000mg/L I will be fine with Stainless steel? Makes sense. -Vincent
  2. Wizeman

    Stainless steel vs. cupro-nickel exchangers

    I honestly don't know. I will have to ask.
  3. Wizeman

    Stainless steel vs. cupro-nickel exchangers

    Hi all, I'm wondering if anyone has had long-time experience with stainless steel exchangers on open-loop geothermal systems. The reason I am asking is because the heat pumps with stainless steel exchangers are slightly less expensive (and more readily available where I am) than cupro-nickel...
  4. Wizeman

    GEOTHERMAL IN CANADA?

    Geothermal energy is a very good and stable energy source. The available capacity depends on the type of soil and amount of ground water. Generally though in southern Canada the ground temperature is 7 to 8?C below 30-40 feet. This means that if you have enough ground water (for an open system)...
  5. Wizeman

    Copying Electrical Circuits in Revit MEP

    Thanks guys!
  6. Wizeman

    Copying Electrical Circuits in Revit MEP

    Hello all, I recently switched to Revit MEP and I love it. However, I am trying to copy entire electrical circuits and I can't seem to find how to do it (ie.: I can't group the LOGICAL circuits, copying switches and outlets is a breeze). Has anyone found a way to do this in Revit MEP 2009...
  7. Wizeman

    Acoustic PVC waste water drains

    OK, yeah, sorry. I forgot to specify that we want an alternative to cast iron. Thanks!
  8. Wizeman

    Acoustic PVC waste water drains

    Hello all, This is a pretty simple question: is there a cost-effective solution for acoustic PVC waste water drains? What I need is 4inch PVC pipes for the risers of a 3-story appartment complex which dampen noise so as to reduce the transmission of sound caused by flushing a toilet, draining a...
  9. Wizeman

    High temperature geothermal heat pump

    lol, star for you! :P
  10. Wizeman

    High temperature geothermal heat pump

    Thanks for your replies. Like carnage1 says, I don't have geothermal resources (ie.: hot springs) in my area. However, what you say about flow vs. temperature makes sense. I'm just worried that the radiators will not induce the same convective current as with a higher temperature which could...
  11. Wizeman

    High temperature geothermal heat pump

    Hello, I am looking to retrofit my existing residential heating system. It's an old oil-fired hot water system with radiators (not baseboard heaters). I know that conventional geothermal heat pumps can't reach higher temperatures than 120°F but I was wondering if anyone here has heard about...
  12. Wizeman

    Calculate Wet Bulb based on changing dry bulb.

    Sure does! I got the whole thing working :D If you want to try out the BETA of my program go to: http://www.v2cstudios.com/en/psychrometree.html Read my blog page for more info.
  13. Wizeman

    Calculate Wet Bulb based on changing dry bulb.

    I agree gepman, I finally caught on to the workings of the process. As for trashcanman's method I see the idea, although I find it much easier to visualize the process using Db and RH. Thanks a lot for the explanation!
  14. Wizeman

    Calculate Wet Bulb based on changing dry bulb.

    Ok, well in my case the only thing I can't calculate is Wb. But I will keep looking too. If you want to use the application I'm making, watch this page: http://www.v2cstudios.com/en/psychrometree.html I'll be launching the BETA (currently it's in Alpha) as soon as I figure this Wb story out.
  15. Wizeman

    Calculate Wet Bulb based on changing dry bulb.

    Thanks for the link, but I'd rather make my own, that way I will understand how it all works together. Plus, I'm making mine cross-platform (Win, Mac, Linux) :D
  16. Wizeman

    Calculate Wet Bulb based on changing dry bulb.

    I know this thread is a month old, but it's never too late ;) Trashcanman has a good idea: t*=(Wx(1093+.444t)+.24t-1093Ws*)/(.24+W-.556Ws*) the problem with this is that given Db, Td (dewpoint) and Patm you cannot solve for t* since Ws* must be calculated using: Ws* = 0.62198(Pws/P-Pws)...

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