In your original post, it is written ".....static friction coefficient must be greater than or equal to 0 and that the dynamic one must be greater than or equal to the static one..." It is odd to have a dynamic coefficient of friction greater than a static coefficient of friction, normally it...
Slightly outside the scope of the OP-- When pulling out the tubes through the tube sheet holes be careful that the corroded surfaces of the tubes could damage the holes.
Dunnage or spread footings under the legs of the racks could be a viable solution. Check out loading from hydraulic and lattice boom cranes which operate on all types of soil found in construction sites. If skeptical do a test load.
It all depend what the sheet metal is used for. I have seen seen and also used successfully screws of sheet metal for panel doors and air ducts, although, I always had a preference for rivets. It all depend on the application of the sheet metal.
You have to consider more than design consideration to fabricate boilers in America and Western Europe. Quality control based on the NB/ASME specs is one aspect if you intend to fabricate boilers in the parts of the world that I mentioned. In China you probably could get away with it .
Flame impingemnt seems to have caused this nightmare. Tube replacement is one way but you have to determine the cause before any repair is done. Also before you undertake tube replacement make sure that there is no other tubes that may have been distorted otherwise you could have interference...
Your success will depend on your knowledge of thermodynamics. For references Perry Chemical Engineering and Kent "Power" handbooks have an abundance of information on CO2 however to understand the information, knowledge of thermodynamics is essential. Even if you can procure handouts from CO2...
To minimize condensation, reduce the air flow from the AC so that it runs for a longer period of time. Frequent cycling the AC "on" and "off" does not allow enough time to reduce condensation. Obviously there are other factors such as having too much outside air and too much water vapor from...
If your company is strap for money, instead of purchasing a new tank, look a second hand tank but beware of past experiences and of deleterious details on inpection reports on that tank. For second hand tanks, I would research second hand Propane pressure vessels which are abundant for purchase.
TugboatEng- Your idea is viable but for convection to be effective I would leave gaps on the bottom and top of the sheet metal and the spacer holding the sheet metal to the bulkhead should be fire rated. A similar idea is adopted in the National Fire code, NFPA 96 for commercial cooking...
I do not want to nitpick but I could not help it when I noticed that when using to top drawing as a reference, the front drawing is upside down while the right side drawing is correct.
Assuming you had courses in thermodynamics, and transfer and physics, you will first assume no heat transfer to the surrounding of the tank and no gain in the heat absorb by the tank wall. The equations to consider include the mass flow rate of the fluid entering and exiting the coil, the first...
