Biodiesel

You are currently browsing the archive for the Biodiesel category.

The truck has a bunch of systems: fresh water, waste water, propane, ac power, dc power.

We use a super quiet Honda generator to power the AC. Last week ours died ;explaining the morning start issues Monday and Tuesday. We bought a new generator. And the best thing is that this one weighs 1/2 of what the last one weighed!

I’m starting to question whether diesel was the way to go. I looked forever to find the right truck, and I paid a bit more than I would have for gasoline. Now it’s not too happy starting up in the cold.

Starting to wonder whether we can pull this off all winter. What we really need is an indoor parking space.

Compost

Some of you might have noticed we compost. I could write on and on about compost, but I’ll keep this first posting focused. Some of you may think compost is gross. I think it’s beautiful. It’s your proof that you’re getting just-cut food. And it represents our commitment to tread gently.

I was shocked when I first started getting into this to find that restaurants and other food service institutions do not compost. I just couldn’t believe it. Since then I’ve learned a thing or two. First, you wouldn’t believe how little organic waste many operations produce. Second, and more importantly, it’s a pain in the a$$ to compost.

First we tried to get it to farmers. They stopped receiving, something about it being too cold in the winter. Strange, since my experience with compost is that if you’re doing it right it generates heat that carries through the winter.

Second, I called Boston Public Works. Nothing. A phone number? Nope. A company that could help me. Nope. Dead end.

Third, I looked up compost-related terms on google maps. After calling a few dead ends I reached a Somerville-based organization that gave me the number for “Save that stuff.” I called them. The program sounded good. They said they would set me up. Bucket rental was something like $6/ month, OK. Then they tell me that it’s going to be $104 every X pick-ups. What? I actually was naive enough to think I might get paid for my compost. Crazy.

So we ended up packing it in Gordon’s car. He was nice enough to take it from us. Here we are, balancing the compost in his Jeep after clean-up.

 

For those interested in the details, here’s a quick summary of how these vegetable oil conversions work. Apparently the diesel engine can run on vegetable oil just fine, so long as it is (A) the right temperature (~150°F), and (B) doesn’t contain water or particles. It seems that (B) has more of an impact on the life of your fuel filters than anything. So here’s the layout:

  1. An oil tank is added to supplement the existing diesel tank. The oil tank typically has a heater inside or at the feed pump.
  2. A heater (typically a heat exchanger that uses the existing engine coolant) is connected in-line to heat the oil on the way to the engine
  3. Electrically-controlled switches are added between the tanks and the engine
  4. A bunch of hoses must be added. Hoses for the oil send and return (for some reason diesel engines send excess oil to the engine, the remainder is returned to the tank), hoses for the heat exchanger, extra hoses for the existing diesel fuel in order to run it through the switches
  5. A controller manages the switches and in some systems the heaters/ heat exchangers

People with these conversions typically fill both tanks (oil and diesel), start on diesel, use the controller (in the cab) to switch to oil after the engine has warmed up. It’s important that the oil be filtered of both water and particles.

Tags: , , ,