Recent content by jammydude

  1. J

    Convective heat transfer and steady state conduction problem

    Yeah assuming one year, sorry for slow replies this part B is taking it's toll on my sanity haha
  2. J

    Convective heat transfer and steady state conduction problem

    yeah that's all good now, I'm still just a tad stumped as to where I throw the 80% efficiency into the mix, though :(
  3. J

    Convective heat transfer and steady state conduction problem

    I believe I've ran into a snag with the very first calculation - surface area of the cylinder. Somehow I got 32.42m^2 instead of 36.95m^2 so here we go again!
  4. J

    Convective heat transfer and steady state conduction problem

    Hey, Yes that's $/GJ and I'm unsure as to how to factor in the 80% efficiency of the oven. Thanks for pointing that out - I should definitely leave in the sec/yr calculation. This has been a big help!
  5. J

    Convective heat transfer and steady state conduction problem

    Area of the oven exposed to the air; (pi x d^2)/2 + (pi x d x L) = 32.42 m^2 Heat transfer rate of the system with no insulation: q=hA(Ts-Tsurr) q=20 x 32.42 x ( 80 - 23 ) q=36.96 KW Heat transfer rate of the system with 1" insulation: Thermal circuits- Rcond= ln(r2-r1)/(2 x pi x L x K) Rcond=...
  6. J

    Convective heat transfer and steady state conduction problem

    Hi all, I have a unique problem that I need help with A company's curing oven's exposed surface temperature is measured at 80°c when the surrounding air is 23°c. You think it should be insulated and wager to pay for the cost of this yourself if you can keep the savings incurred. Is this a smart...