Cian said his project had been a work in progress for five years so the results from the fair felt pretty great.
The project had been trying to design a new type of electrical generator, and this one was for a hydropower station.
"Probably the biggest thing I enjoy with these projects is the creation of something new and solving the problems that pop up."
Cian said technology was something he would like to pursue further, and next year he would be going down to Canterbury to study engineering. He wanted to thank Kilwell Fibretube for their support throughout his project.
Franken said this fair gave students a great opportunity to explore science and technology, with a degree of mentoring if required.
"It may encourage them to go into these fields at a tertiary level and hopefully from there on to careers."
Franken said the schools run their own competitions and then submit the best entries into this regional science fair.
The schools can then nominate the best of these entries for the national competition.
He said each of the schools that submitted students were required to supply a judge, and the rest of the judging panel came from Scion and other organisations.
"We would like to have a lot more senior students entering, and more Rotorua schools competing."