Issue 20, 2007

Science Centres: Energy

Wave energy device hits the water

Biogas power made easy

Flaxroots approach to infrastructure

Flaxroots approach to infrastructure Inside the wharenui at Pōhatuiri Marae discussing renewable energy and efficiency options. Last year, the Pōhatuiri Marae Trust approached NIWA about renewable electricity solutions for their marae near Waitomo. "We asked ’electricity for what?’," says NIWA energy research engineer Rilke de Vos.
Biogas power made easy Stephan Heubeck, NIWA, with the biogas-powered generator. (Photo: Rupert Craggs, NIWA) NIWA research is demonstrating how easy it is for farmers to generate electricity from biogas. A simple DIY job It took less than two hours to convert an off-the-shelf generator to run on biogas at Dexcel’s Scott Farm, near Hamilton in the Waikato. Equipment with a total load of 9–10 kW ran happily for over two hours on electricity from the generator. And, unlike petrol or diesel, there was almost no black soot or odour.
Wave energy device hits the water The proof-of-concept device (one-quarter size) hanging upside down. (Photo: Robert Stuart, IRL) Wave energy device upright in the water during Lyttelton sea trials.