hi hanson
well,i was a final year undergrad student last year-:),i did my graduation project with a fire-fighter robot,we made it.
i don't know about the microscale heat transfer,i just i was thinking to design the vortex tube and when i found that u asking about a topic in the heat transfer i wanted to tell u,cuase i heared about a master study had been made about the vortex tube,its simple yes to design,but it hase many info u have to know to do it effective.
also u could get a pretty air conditioner without high consumption of power,no fereon,no moving parts,compact,so if u studied it u could do it more reliable than the air window conditioner.
i was confused like u last year when i began my project,but our prof gave us a topic and we searched in this topic till we get what we want to do,so may ur prof would help u giving u a topic,or ur school friends may had any ideau talk with them.
use the net search of course also,it would help u choosing a good topic,but 1st find the topic and after go with search-:),then if ur inetersting in microscale do a search and begin ur project.
sorry if i talked a lot-:)-wish u the best-thanks