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  1. jcoots

    Solar Power Application - Need Help

    I have a potential application for solar concentrating power. It involves an intermitten use for the steam produced. However I am not knowledgable enough about the details to determine the feasibility of the project. I am looking for someone to talk to. Can anyone point me in the right direction.
  2. jcoots

    API Tank Jacking

    Thank you both for the response. JStephen, I was kinda thinking the same thing about the method not be significantly better. I have recently spoke with another prefessional in the industry about this and found that an international tank builder based in America researched into it a while back...
  3. jcoots

    API Tank Jacking

    Does anyone have any experience or knowledge of tank jacking in the USA. In my research so far, I've found companies who build tanks by starting with the top and jacking it up, placing the next shell ring under the top, jacking all that up, then the next lower ring and so on till they do the...
  4. jcoots

    Using a TRUSS as a WINDGIRDER

    Thanks for all the responses. IFRs, I will try the approach you mentioned of equivalent section modulus. In this case the wind girder would only be needed until we get the new roof on the tank. We thought about the guy wires but given the constraints around the tank and the access to the tank...
  5. jcoots

    Using a TRUSS as a WINDGIRDER

    I have to temporarily support the top of tank against wind buckling while we replace the roof. The tank is 220' dia and about 40' tall. I am trying to stay away from putting up a traditional windgirder b/c of cost and time. I'm thinking about modifying my tank scaffolding to act as a truss in...
  6. jcoots

    API TANK vs. Wind using Algor

    Thanks for your advice. I have uploaded the archive model. I haven't had time yet to try your suggestions. I hope to get to it this week. I do think all the load vectors are in the correct direction...
  7. jcoots

    API TANK vs. Wind using Algor

    Attached is a screen shot of the mesh I am using. This particular analysis I had a rectangular door cut out of the bottom. In this case there was a max of 3" deflection at the top, but still nothing close that I am expecting to see. I have not done a mesh sensitivity study. I have tried...
  8. jcoots

    API TANK vs. Wind using Algor

    I've been trying to model wind effects on an API 650 above ground storage tank. The model is simple enough and runs fine, however the results I'm getting are way off the mark. Has someone done this successfully before? I've got modeled a 60' diameter x 60' tall open top tank. I've got the...
  9. jcoots

    Superheater Evaluation

    What's your advice? I have a 100,000#/hr blr. operating at 225psi saturated. I am considering adding a superheater at 500 F. I am trying to calculate an expected horsepower increase by doing this. I do know efficiency will come into play at some point. I am thinking that I should use 2nd Law...
  10. jcoots

    How does an Engineer best serve his company?

    Wow, I appreciate all the input. And agree with most of it. And the answer to one of the obvious questions is 'No' this is not about me. This is about guy who I am a mentor to through a local eng. society. And to answer another question: the guy isn't being faced with this decision yet. It was...
  11. jcoots

    How does an Engineer best serve his company?

    Mechanical Engineer. He works for an industrial construction company in the Gulf South of USA. Their primary work is in the petro chemical industry. The engineering involves vessels, tanks, structures, some thermodynamics and fluids problems.
  12. jcoots

    How does an Engineer best serve his company?

    How does an Engineer best serve his company? I ask this in terms of possible career paths an engineer may take in one company. In this particular situation there is only one real engineer and several construction project managers, drafts people, and estimators. The engineer is young with only...
  13. jcoots

    Do I lose energy through this expansion process?

    Thanks for all the input. I've been out on vacation and holidays so thats why I haven't replied until now. First, thanks for the confirmation, insight, and suggestions. To 'rmw' the answer is a Sugar Factory. Currently they are running all their boilers into one header at 300 psi. The problem...
  14. jcoots

    Do I lose energy through this expansion process?

    I have a case where I have several boilers at 430(psi) @ 550(deg F) feeding into a high pressure header. I also have a few boilers at 275(psi) feeding into a low pressure header that feeds the factory equipment. I am considering joining the two headers having an expansion valve between the two...
  15. jcoots

    Fatigue Analysis Advice

    I am charged with designing support lugs for an ASME vessel for about 50,000 cycles of filling. This subject is not one I have any professional practice with but would like to learn. For this case, what would be the best route to take: is there a reference book that may help or would it be...
  16. jcoots

    IFR Pontoon Moment of Inertia - How to figure?

    Thanks for all the input. Your answers are about what I expected.
  17. jcoots

    IFR Pontoon Moment of Inertia - How to figure?

    I know it the weld area wasn't being considered, at least for this part. The number I am refereing to seemed to includ a few inches of plate in both directions from the corner, but I couldn't tell exactly how the number was derived. I'll see if I can find those calcs again and provide what info...
  18. jcoots

    IFR Pontoon Moment of Inertia - How to figure?

    I have come across some calculations for a floating roof recently and noticed that when analyzing/designing the pontoons the engineer used the Moment of Inertia of the Pontoon cross section when looking at the Pontoon bending. I found that the moment of inertia was calculated normally for a...
  19. jcoots

    API 650 Appendix E - How do you figure"Nh" ?

    I am looking to get some confirmation on the calculation for (Nh - the Product hydrostatic membrane force) in API 650 App. E I think it is the head pressure at the elevation in question divided by the thickness at that elevation. (Head Press/shell thk.) My second guess is that it could be...

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