When you have a spreadsheet full of data, and you’re doing recursive calculations, make sure that your units are right. Also that your formulae are all correct. Making sure that your initial calculation is correct also helps. I’ve been working on a heat exchanger for the last 14 hours.
But it finally converged, and the delta T is right now, and my tubes actually exist (ok, they aren’t standard, but they do exist!!!)
I thought that I’d be able to work from 8 til 10 and get a good bit of writing done. Not so much… it’s now 2 and I’m still not nearly done writing. But most of my sample calcs are in the document.
This report is due in less than 36 hours, and I really still have a lot to do. I don’t know how I’ll get it all done. Skipping Law tomorrow might be a good option. The really hard part for me right now is the writing part.
Why did I chose a floating head heat exchanger?? Well… it’s the one in the example and so the only one I really know how to do the calculations for?? Oh, and it’s easier to clean!!
But a REAL reason?? I don’t know. How much detail am I supposed to go into about the pieces of a heat exchanger? should I be including diagrams, or do I assume that the person reading this report knows what a 4 pass exchanger is??
I also have to write up something on safety. It will probably go something like this:
The external surface of the heat exchangers are likely to be hot, with temperatures reaching up to 107ºC. Although the heat exchanger will be covered with insulation to reduce the heat loss to the environment, there should still be signs near all exchangers reading “Caution: Hot” to ensure that all workers in the plant are aware of the burn hazard.
I think I’d feel better if I had more time. But I don’t. I think I can spend 10 of the next 36 hours sleeping… I should be able to finish everything if I do that…. I guess it’s time to find out.