Hey, time traveler!
This article is published at 23/7/12 (2523 days ago)
Therefore, the information in it may no longer be up to date. WINNIPEG —
On a hot summer afternoon, watching the light come out of the sidewalk, it is clear that asphalt is common in road and sidewalk construction and is very good at capturing heat.
In fact, in wet July or August, the weather may become as hot as 60 degrees Celsius.
Keep in good condition after sunset.
This pushed up the temperature of the city covered with black material, increased energy demand, air
Cost of air conditioning, air pollution, even heat
Related diseases and mortality
Engineers have long recognized the problem, the so-called "heat island effect", and have made a lot of efforts to alleviate the unpleasant consequences of the problem.
For example, it is recommended that the City paint all black surfaces White or plant more trees.
Recently, however, experts at the Worcester Institute of Technology and the University of Rhode Island have suggested that we take a different approach to view heat
The absorption capacity of asphalt is not a burden, but an asset that has not yet been developed.
Although we don't think so often, what is it doing when asphalt is heated
Solar energy is being collected.
Given the large surface area covered by North America's average urban roads and parking lots, this is the massive amount of free electricity that is currently being lost.
Therefore, the best way to deal with over-heated asphalt may not be to fight against over-heated asphalt
Reserve the power, but try to capture it for production use.
Since 2010, researchers at the two schools have been trying different ways of using this solar energy.
Energy supply, such as laying a series of pipes under the surface of the street.
These pipes can eventually be used to heat the water and then deliver it to the surrounding building or fill it up with other liquids that turn into steam to drive the steam turbine to generate electricity, power the street lamps and other uses.
Engineers in Spain are also using similar heat pumps and energy storage facilities to use trapped heat to keep roads warmer than freezing in winter to prevent ice from forming on the surface.
Such breakthroughs can not only improve traffic safety, but also mean reducing the amount of salt needed for Frost. As extreme temperature changes that cause cracking will be mitigated, the cost of street maintenance may be reduced.
Asphalt is cheap and cash.
Poor cities that are already struggling to pay their bills, they may be hard
To justify spending money on alternative paving materials that cost more.
Therefore, capturing the heat generated by asphalt may ultimately be the most realistic solution to this challenge.
This may also be the most sustainable approach.
Asphalt, after all, is recyclable and a relatively eco-friendly product.
Some estimate that half of North America's cities are covered by sidewalks.
It's just for one purpose: traffic, taking up a lot of space.
Supporting our road network with energy
With the infrastructure, our street and parking lot will serve double traffic/Energy --
It is much more efficient than adding space in the suburbs to lay solar panels or build another power station.
Finally, unlike other solar systems that mainly operate only during the day, asphalt is an incredible insulator, which means that asphalt continues to provide useful power even when it is backward in the day.
As Canada grows longer in summer, it will become even more important to develop new, affordable measures to cool our cities and save energy.
Whether these types of systems are feasible and cost-effective remains to be seen.
But further research is worth it.
Successfully completed, using this power can cool the surface of the street at the same time and send the Heat to a useful place.
Reduced the island effect;
The service life of the cool road surface is longer;
Free and clean solar energy will help to carry out beneficial activities and reduce the need to build energy elsewhere.
In the end, the best way to beat the heat might be to have it work for us.
Benjamin Gillis graduated from the University of Manitoba in political economics with a focus on urban development and energy policy.
He served as an urban development consultant in Winnipeg. —