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  • Users: samv
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  1. samv

    Environmental Action

    It is apparent from the thread regarding Kyoto that we will never all agree on Kyoto, climate change - why it's happening it and what to do about it... However, it looks like everyone agrees to some degree that reducing pollution is beneficial So, as an educational exercise, I'd like to ask...
  2. samv

    Benefits

    Hi all, I am frustrated today because my boss anounced that we had to replace snow days in 4 hour chunks or use personal/vacation to make up for the lost time. We live Canada, and I have to drive 35km to get into work. There are probably about 5 work days a year during winter when a person...
  3. samv

    Heating a house in the most effective manner

    In your opinion, what is the most energy efficient way to heat a house (in Canada or Northern US) and why? What is the least efficient and why? Best regards, samv
  4. samv

    black and white - no sun

    (this post was first posted in HVAC/R forum - but here it is again as it is more for you heat transfer experts) My understanding is that assuming the paint and material underneith have similar properties... 1- a surface that is painted black and exposed to the sun will behave differently than...
  5. samv

    black vs white - no sun

    My understanding is that assuming the paint and material underneith have similar properties... 1- a surface that is painted black and exposed to the sun will behave differently than the one that is painted white. The black one will absorb much more heat. 2- a surface that is painted black and...
  6. samv

    boundary layers around vortex shedding cylinder

    In regards to vortex shedding cylinder discussed with Vortexman in thread1-65116 What happens to the boundary layer in laminar flows for flows past circular cylinder with Re 4 to 60? Above 60?
  7. samv

    CFD software

    I am very excited at the prospect of becoming a "CFD specialist" for the company I work for. We currently design on more of an experience and trial and error basis. We use Pro/E. We are a manufacturer of ventilation products. I am interested in simulating: -fans and their...
  8. samv

    insulation of air ducts in attic

    Hello everyone, If I were to run air ducts in an attic and do not want condensation to form on them, what guidelines or standards should I follow for insulation thickness? Thanks Samv
  9. samv

    Understanding Heat Exchanger Scaling Parameters

    Good Day, I need help understanding scaling of heat exchangers. I have the book Hesselgreaves, Compact Heat Exchangers. P.8 talks about the geometric parameters - and p.12 has other parameters. At this time I am concerned about the geometric parameters. Ex. Dh2=Dh1/N, Dh2 being...

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