How Biodiesel Works" If you've read or watched the news lately, you've probably come across some article, snippet or sound bite related to oil and oil prices. Even in your daily routines, there's a good chance of someone mentioning it. Whether it's in automotives, economics, history, geography or politics, oil has managed to filter into almost every aspect of our daily lives. All of this talk about oil sparks continued interest in gasoline alternatives. Lost in the mix are the biofuels, fuels made from biological ingredients instead of fossil fuels. In this article, we'll take a closer look at biodiesel, one of the major biofuels. Generally speaking, biodiesel is an alternative or additive to standard diesel fuel that is made from biological ingredients instead of petroleum (or crude oil). Biodiesel is safe and can be used in diesel engines with little or no modification needed. Photo courtesy U.S. Biodiesel isn't just a catch-all term, however.
Build a Simple Solar Heater After walking into my workshop one December morning and feeling a bone-chilling 10 degrees, I decided to install a heating system. Given the rising costs of propane and my family’s environmental concerns about using nonrenewable fossil fuels, a solar solution seemed fitting. I’m a retired aircraft engineer, but you don’t need a similar background to tackle this project. In fact, a solar air heater built into new construction or added to an existing building can be an easy and inexpensive heating solution. Following the simple principles and plan outlined here, you can heat your workshop, barn or even your home with free heat from the sun. I reviewed many solar collector concepts and decided to install a thermosiphon air collector on the south wall of the workshop. To minimize costs, I integrated the collector with the structure and used readily available materials. How It Works The thermosiphon collector consists of clear, corrugated polycarbonate panels fastened to 2-by-6-inch studs.
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