The battery in an electric vehicle (EV) faces serious performance demands every time the driver steps on the accelerator or the brake. So after a number of years, when its capacity has dropped 20 to 30 per cent, it gets replaced.

But that retired battery can still function well in less demanding applications — like stationary energy storage systems of microgrids — where the fluctuations in power/energy and charge are much smaller.

Because the sun doesn’t always shine and the wind doesn’t always…

Some municipalities take a greener approach. Some burn the methane to produce electricity, but that’s an expensive process. Others use anaerobic digestion to break down food waste, but the value of the resulting compost isn’t high. 

Hyung-Sool Lee, director of the Waterloo…

Producing food consumes a lot of energy — and, as a result, creates a significant proportion of the world’s greenhouse gases. As the global population grows and the planet continues to heat up, it becomes more important than ever to produce food efficiently.

That’s why WISE member Keith Hipel, along with colleagues at York University and Queen’s University, recently scrutinized five different agricultural systems in coastal Bangladesh to compare energy efficiency and greenhouse gas emissions.

Trad…

An electric vehicle (EV) is only as good as the battery that powers it. Battery performance drives vehicle performance and reliability — and ultimately the willingness of consumers to trade their conventional car for an electric version. 

Various numerical models have been developed to predict the behaviour of batteries. But to be useful to EV designers, they have to reflect real-world conditions as accurately as possible. That’s where WISE researchers come in. 

A team headed up by mechanical…

To prevent global warming from reaching catastrophic proportions, we need to slash greenhouse gas emissions. The question is how. WISE researchers have a nano-sized solution: tiny balls that trap CO₂ emissions within smokestacks before they wreak climate havoc. 

For a number of years, investigators have recognized that porous carbon can adsorb CO₂. Now a team led by Waterloo’s Zhongwei Chen has developed a way to maximize that useful property. 

The researchers began by creating nanospheres…

When the three little pigs built their houses, their top priority was protection from a huffing, puffing wolf. But according to WISE member and civil engineer John Straube, the biggest concern when it comes to building performance is actually water.

In every climate zone on Earth, houses must be designed to handle moisture, whether it’s rain on the outside, condensation on the inside or leaks in the plumbing system. 

In August, Straube shared the latest research on moisture physics at the 2018…

Blockchain can do more than drive cryptocurrency transactions, according to WISE researcher Srinivasan Keshav. The computer science professor also sees opportunity to let small-scale energy producers sell green electricity to the highest bidder.

Currently, a homeowner with a dozen photovoltaic panels on her roof has only one option for selling the electricity she produces: to the local utility at a price established by government.

But as Keshav points out, lots of companies are keen to prove…

Electricity is often generated hundreds of kilometres from where it’s consumed. (Think offshore wind farms and remote hydroelectric dams.) The most efficient and economical way to move electricity over those kinds of distances is through high-voltage direct current (HVDC) transmission lines — so-called “power superhighways.” 

However, addressing faults like voltage or current spikes and short circuits is far more difficult in an HVDC grid than in a standard AC grid, because they travel so much…

As the electricity grid ages, blackouts become more likely. Placing sensors at strategic locations along transmission lines would allow grid managers to detect faults or fluctuations before they cause major headaches. However, powering those sensors with batteries would require replacing the batteries every couple of years — an expensive proposition when you consider the labour involved. 

That makes the idea of self-powered sensors very attractive. Once installed, they would keep working, year…