mechanical Engineering Reference Manual for the PE Exam, by Michael R. Lindeburg.
Difficult to explain the process on here, best if you got a hold of the above mentioned book....it is a great book and has heat exchanger design theory and practical examples.
You can design a heat exchanger for...
There seems to be a lot of HVAC jobs out there right now. There will always be industry (chemical, food processing, refineries) so I think that is a good area as well. As far as the future, I think that engineering in alternate energy sources is going to be big. I have several years of...