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Thanks Zekeman, I think that's the same conclusion I came to. What I am trying to understand is what is going on in 3D. Conduction longitudinally doesn't happen in a matter of seconds. For example, at t=30s the outside diameter temperature is up around 450 DEG F at z=1" (longitudinally along...

Three questions 1) why do you need temperature -time response (transient)-->I don't think that it is appropriate to assume 2D steady state. The reaction begins at one and continues until the end, much like a strip of paper burning. 2) where doers this air gap come from? -->The air gap comes...

First off, for the record I used to work for a HX manufacturer....... I agree too, P&F is the way to go. It has been a few years since I was involved heavily with HTX's, but if the vendor recommends a glueless option, I highly recommend the glueless option. Some of the older P&F gasket...

Sorry for my delayed response. On the outside of my cylinder I know the surface temp as well as the surrounding environment temp. Using these I can calculate q, the rate of HT. Therefore I am looking at the boundary conditions of the outside environment and the cylinder surface. Between...

Hi everyone. I am trying to model my design and could use some help. I have a cylinder that has a exothermic chemical reaction occurring within it. On the ID of the cylinder there are 3 layers of insulation. The OD is exposed to amb air. I have started to model it but I am having difficulty...

Thanks for the info skearse! That makes a lot of sense. From know on in my vocabulary I will refer to the the respective items correctly. I am all for global standards.

Thanks a lot for those links Joe. Insult you are correct I used 14psi originally more for making calcs easier, but also as you said, I am not at sea level. For here its ~14.3 Also, is pressure safety valve the correct term? I have always called them pressure relief valves. Is this to...

Thanks for the feedback insult. Last night while brushing my teeth I suddenly realized what was going on, I am always amazed at the simple little things that are easily overlooked. Sometimes its best to go back to the basics and go over that stuff.

After going through many threads and from my previous knowledge I have a good idea of what is going on, but I would like some concrete calculations to back me up. I am designing a very simple pressure relief valve. It consists of a spring, a disc, and a nozzle. The spring and disc experience...

Thanks for the comments everyone. My apologies, I am having trouble with attaching my diagram to explain better. Any ideas on optimal geometry in terms of curved top vs. flat top design? Convex vs concave? Based on my knowledge, if I think about the product in terms of a pressure vessel with...

Since your last post said you are taking the FE in a month, you are likely taking it this Saturday or next I assume. At this point I would say that you still have time to cram a lot of studying in, if you can afford the time from work. I hope you got one of the thick FE study guide books, just...

I searched around and couldn’t find anything, my apologies if this has already been posted. Does anyone know any good resources that cover optimal sheet metal geometry? My application involves something similar to the bottom of a soda can. It is about the same size as the soda can, only...

No,it's not Honeywell, but thank you for the advice. I have a contact inside Honeywell, maybe I could use that in the future.

I really appreciate you feedback and insight. It is interesting to learn your views on the industry and your forecast of what is next to come. Ingles es mi primer idioma, pero Ud.tiene razon, necesito eletrear mejor en mis comunicaciones. (English is my first language, but you are correct, I...

i must be confused... What you are describing sounds a lot like my original idea. Thanks for the input.

Thanks for the advice kevin. The issue with a spring-actuated mechanism is teh cost, that of which i am trying to get down. The application is for a product will only be used once. During usage if teh pessure builds too high, this would relieve pressure. Becuase of its one time usage over a...

Thanks, I really appreciate the responses and differing opinions out there.

I have always been interested in Energy since i began my engineering studies bakc in college. I currently have a a position with an aerospace company I enjoy, but in teh long run, ie- 3 years from no maybe, I woudl be interested in getting into a career of engergy engineering. Ideally I would...

for anyone else stumbling upon this thread unfamiliar with wind power- http://www.windpower.org/en/core.htm pretty comprehensive

I agree that we need to be mindful of the "big picture" when engineering solutions to teh problems we encounter. Sure you are not going to sell design A that costs 300% more than design B just because design A reduces energy consumption by 10% over design B, but we need to keep in mind that it...