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  1. blueflag

    surface temperature with given conditions

    thx, ione I saw your first post, also, thx for the link (really nice one). so please correct me, if I made mistakes: 1. this is the base to calculate the Heat Flow:? Q=2*pi*k*L*(t.inside-t.ext)/ln(r.ext/r.int) were: r.ext = exterior radius of cladding (m) r.int = exterior radius of pipe (m)...
  2. blueflag

    surface temperature with given conditions

    thx for help. I have an small program from Rockwool (company that make insulation), putted inside all the value, gives me the temperature of cladding (conform the above conditions)in the end of the temperature is 39.3°C. I try to remake the rockwool formula to added in an excel sheet. So, I have...
  3. blueflag

    surface temperature with given conditions

    Good morning, I have the following problem and I would like your advice: I have an pipe (DN 100) insulated (50 mm, Rockwool) + Cladding (aluminum). Then, I have inside of pipe an temperature of 200 °C, the ambient temperature (20 °C) and the air speed (1 m/s). How can I calculated the surface...

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