Psystenance

Sustainability through the mind's eye

Posts Tagged ‘pollution’

Good ideas: Hybrid garbage trucks

Posted by Michael Druker on July 30, 2009

Hybrid buses seem to be all the rage these days in many cities — and including Grand River Transit. If hybrid buses make sense, then why are there no hybrid garbage trucks?

Especially when operating suburban-type routes, garbage and recycling trucks make very frequent stops. This means they lose quite a lot of energy to braking, which could and should be recaptured. From each of their frequent stops, they have to accelerate their massive weight — and here an electric motor would do a much better job than a diesel one, I would think.

As with buses, the hybrid drive should make the diesel engine last longer and of course improve fuel use. In addition, there is the significant external benefit of lower diesel emissions and, especially, less noise. Garbage trucks struggling to accelerate with their diesels is a truly awful sound in the mornings.

So hybrid power makes sense for garbage trucks at least as much as it does for buses. Why aren’t they on the roads, then? My uninformed guess is that it has to do with them being owned and operated by private companies as opposed to the public transit operators that buy hybrid buses. GRT’s hybrid buses cost around 50% more than the regular ones, and that probably has something to do with it as well.

Upon investigation: within the last year or two such trucks have appeared, not just in hybrid electric form, but also as hydraulic hybrids. The industry group Calstart has a Hybrid Truck Users Forum that is working on hybrid refuse trucks, and impending U.S. government emissions standards seem to be pushing manufacturers in this direction. New York City is trying out a few competing versions, and will probably set the example for others. With increased demand, competition and scale will drive down costs, and I suspect hybrid garbage trucks will become the norm for new purchases within a couple of years.

Posted in Miscellaneous | Tagged: , , , , , | 2 Comments »

Good ideas: Lawn-mowing bicycle

Posted by Michael Druker on July 28, 2009

Mower bike

Somewhere along Highway 8 between Cambridge and Hamilton, I thought I glimpsed a weird-looking old tricycle / lawn-mower. Using a bicycle to make it easier to mow with a reel mower seemed like a terrific idea. To my surprise I found that such a thing appears to have never been mass-produced. What I did find, however, was a gallery of such bicycle lawn mowers at TreeHugger. If you are handy then these are apparently not too difficult to construct.

Lawn mowers (and their small-engine ilk) are the sources of some of the most annoying but ubiquitous sounds in all places with lawns, so I am all for people replacing them with quieter bicycle mowers — or even just regular reel mowers. Of course, they also don’t stink up the neighborhood, and I suspect they’re probably a fair bit safer.

Posted in Miscellaneous | Tagged: , , , , , | 2 Comments »

 
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