Use wasted energy from your chimney and send it back to your house

Use wasted energy from your chimney and send it back to your house

Why do you build a fire? Probably to warm the house, and because it looks pretty cool. But what about all that wasted energy that exits the chimney as heat and burned up biomass. How about harnessing that energy and storing it? Yep, I want to turn your chimney into a personal power plant that can help keep your electricity bill down.  Or even better, you might be able to make some extra power and sell it back to the grid and make some side cash.  Think Stirling Heat engines.

Let’s first examine how much energy is stored in wood.  The Sustainable Energy Development Office (SEDO) states that wood has about 4.5 kWh per kilogram.

So how much electricity to run a house?  Obviously this depends on the homeowner, but a good estimate is about 50 kWh per day.

So if we were to burn 10 kilograms of wood in the fire place, you could almost live a whole day on that!  Now as an engineer, I realize that 100% efficiency is impossible, especially for the conditions your fireplace is in.  But, we could take some of that energy and suck it back to the power grid.  Your going to burn that wood anyway, might as well go a little green with it.