John Lumkes, Purdue Ag and Bio Engineering, on Home Construction and Energy Use--Purdue News
September 8, 2008
Multicar garages, vaulted ceilings, in-ground swimming pools and kitchens the size of small cafeterias often are the kinds of features people want when they build homes. They might not give as much thought to energy efficiency, said a Purdue University agricultural engineer.
"Without adding much more to the cost of a new home, you can build a house that uses less than half the energy that it normally would," said John Lumkes. "You can often recoup the cost of making your home more energy efficient within the first five years."
Lumkes will share energy saving ideas during Energy Efficiency for Households, Farms and Small Business. The trade show and forum takes place from 2-7 p.m. EST Thursday (Sept. 11) at the White County Fairgrounds Community Building. The fairground is located a quarter mile north of U.S. 24 on County Road 25 in Reynolds.
July 21, 2016
The recent recall of hoverboards because of exploding lithium-ion batteries highlights the danger of overheating batteries. Amy Marconnet, an assistant professor of mechanical engineering, can speak about the effects of excessive heating in batteries. Marconnet (pronounced mar-co-nay) founded the Marconnet Thermal and Energy Conversion Lab, where researchers are dissecting the batteries and testing materials making up electrodes and a critical component called a separator. (A video is available at https://www.youtube.com/watch?v=qCTMA8sxZO0) Battery failures have been reported in products ranging from commercial airliners and laptops to hoverboards and cellphones. Chemical reactions in the batteries generate heat while discharging and charging. The separator is a layer of material between the positive and negative electrodes. When it fails due to high heat, the battery short-circuits and could explode.Read Full Story