Posted by: Li Ling Young | February 16, 2013

Seasonal energy

When Bill McKibben‘s ideas about eating local swept the state about ten years ago, Nik and I jumped right in.  I have a tremendous feeling of gratitude when I sit down to a meal and I can look over the table at foods of which I know the provenance.  I am grateful for the expertise our farmer has, and the work he puts into growing our food big and healthy and beautiful.  Within the food is captured the good conversations we have when we go down to the farm to pick up our vegetables.  Part of our meal is the time I spend outside in the quiet, sunny, wide open farm, selecting my vegetables, picking some of them off the bush.  By eating local we’re also employing our neighbors, which in turn keeps our community healthy with good paying, skilled jobs.  We’re sustaining farming so there will continue to be farms, and the land will continue to be a working landscape.  It’s not too far fetched to say that by eating local I’m keeping our piece of the country from turning into parking lots and my neighbors into cashiers.

We have a membership in a community supported farm.  Our subscription buys us a once-weekly share of vegetables, which we go to the farm to pick up.

We have a membership in a community supported farm. Our subscription buys us a once-weekly share of vegetables, which we go to the farm to pick up.

Eating local immediately turns into eating seasonally.  After the abundance of August, eating local suddenly seems to be all about what’s not available: lemons, asparagus, strawberries, spinach…  So eating seasonally becomes another exercise in gratitude.  Everything we have in November (beets, cabbage, butternut, potatoes, carrots…) is such a miracle.  I love digging around in the produce drawer and finding a mealful of veggies months after our last visit to the farm.  The thing that strikes me most about eating seasonally isn’t so much how hard it is, but how easy it is to eat without principle.  In fact we eat mostly non-locally and non-seasonally.  Grocery store shopping is all about a strict separation between your consciousness and the origins of the food.  The uniformity of grocery stores and of food products obscures everything about where food comes from, how it’s grown, who grows it, how it gets to you.  The abundance of acres-big supermarkets quiets the mind’s curiosity about limits: geographical, seasonal or otherwise.  And yet, when we ran out of carrots in June  I did not put them on the shopping list.  California carrots are always just down the road at the 24-hour supermarket.  But I knew, just around the agricultural corner, our farm share would one day include some slender, fresh-skinned, neon-colored new carrots.  Could we wait..?   Yes, we can wait!  With gratitude all is possible.

And so it is with energy that comes out of a wall socket.  The modern electric grid is all about consistently supplying 120 volts of electricity 24-7: no blips, no brownouts, no shortages, outages or limits of any kind.  There is no rhythm to using grid electricity: no batches or bucketfuls, no deliveries or open hours, no budget, no end…  Or so it seems.  As with all systems, the way we use electricity has evolved in response to the way it is supplied, and the expectations around what constitutes quality energy evolves in response to how we use electricity.  If electricity were only available for 12 hours every day (a situation I think would work just fine for most people), there would never be little electric appliances that set themselves back to a zero state every time they lose power (those blinking electric clocks are tiny billboards saying “We feel entitled to unlimited, uninterrupted electricity.”)  It is very easy to use electricity thoughtlessly.  Americans wanted an energy system without limits.  Careful what you ask for.mban2099l

A troubling question to consider is, if your system does not limit your consumption is it ok to use as much as you can?  With food maybe the consequences of doing so are clearly unethical: wasted food is firmly linked in our imagination to hungry people in…  Ethiopia… or somewhere.  With energy, if you don’t use it, or if you use a lot of it, does that affect your neighbors or someone in another country, far away?  There aren’t kWh lying, uneaten on the plate.  Is it wasted?  Would it just have sat in the outlet, waiting for the next time if you don’t use it?  If we use electricity, does that mean someone, somewhere else can’t?  One of the visionaries of energy conservation, Linda Wigington, observed that we act as though the only consideration in how much energy we use is whether we can pay for it; that there is no ethical implication to using energy.  Wait… is there?

In a way that I find peculiar to consider, we manage to have an element of seasonal energy eating in our household energy consumption.  What I mean by that is there are limits imposed on our energy consumption that arise from environmental conditions.    The way that we use energy responds to these conditions.  It’s only seasonal in the sense that the constraints are sometimes related to time, but it’s not seasonal in the sense that it’s annually cyclical or related to the growing season.  Instead of treating energy as a limitless commodity available in whatever quantity we want at a moments notice any time of day, night or season, we sometimes consider when we use energy so that we can use it in a way that takes advantage of our local energy environment.  We choose this seasonality.  We are grid-connected and we could just let the electricity flow out of the outlet without consideration to what, how or when we are doing it.  That would be much the easiest way to do everything.  But we have the tools, knowledge, curiosity and motivation to do otherwise, so sometimes we eat local energy.

The first seasonal energy eating I took note of was right after we installed our solar PV system.  We weren’t yet metering the electricity, so anything we generated was sent to the electric utility without being counted.  At the time I thought it best that we use that electricity while it was being generated, rather than let it disappear onto the grid, and then have to use the same electricity later (for a need that would have to be satisfied eventually).  I talked about that in the post Getting the Big, Fat Pig of a Water Heater to Fire.

Here are three of my solar cookers in side-by-side tests.  I have to orient them to the sun every hour or so.

Here are three of my solar cookers in side-by-side tests. I have to orient them to the sun every hour or so.

My favorite seasonal energy eating is solar cooking.  I’ve got several different kinds of solar cookers, and when it’s sunny out I try to put our evening meal out to cook by 10 am.  This takes a lot of advance planning, which means I have to watch the weather report so I can have the raw meal ready in the morning on a sunny day.  It also takes some attention throughout the day because my cookers need to follow the sun across the sky, which means I have to rotate them manually.  I can do solar cooking in the winter on a really bright day, but the cooking window is small, so the meal has to be one that will cook quickly.  Supermarket energy is easy.  Seasonal energy eating takes planning, time, dedication.

Drying laundry outside takes more time, can't be done any ol' day, and leaves heavy clothes a little dampish.

Drying laundry outside takes more time, can’t be done any ol’ day, and leaves heavy clothes a little dampish.

A very gratifying form of seasonal energy eating is drying our clothes outside.  We discovered the electric dryer adds a third to a half to our normal daily electric use, and became much more motivated to hang our clothes to dry.  That was all well and good in the summer when we could dry our clothes pretty much whenever we wanted.  Come fall our clothes came off the line smelling like woodsmoke.  In the dark part of winter there just wasn’t any outdoor drying happening.  We’re now into the sunny part of winter and Nik has started hanging the clothes out.  We can dry a load in one full sunny day, except the jeans are a little damp and they need a few minutes in front of the woodstove to finish them off.  And that’s even with the clotheline on the shady side of the house!  It does take about 20 minutes to hang a load on the line and about 5 minutes to bring it in.  It only takes about 40 seconds to load the dryer.

Our electric utility keeps track of how much electricity we generate and stores it as a credit on our electric account.  We can only keep the credit within the last twelve months.

Our electric utility keeps track of how much electricity we generate and stores it as a credit on our electric account. We can only keep the credit within the last twelve months.

We are now faced with a particularly strange form of seasonal energy.  We’ve made it through the darkest part of the year.  Our electricity generation from the solar electric system is on the upswing.  Our electricity use will decline a bit as we use electric lighting less and dry our clothes outside more.  And we’ve got a huge credit on our electric bill.  Due to some great, progressive regulations in Vermont we get credited at a higher rate than we pay for electricity.  As a result, and also as a result of just having a very large PV system, and being generally energy misers, we have racked up a big credit with our electric utility.  And now we know we’re not going to use it all, because from here on out, barring a strange meteorological event like the volcano eruption of 1885, the credit is just going to get bigger and bigger.  After twelve months we start to lose the credit.  It’s really just never going to get used, by us that is.  So, is it ok to start using electricity like there is no tomorrow?  If Linda Wigington is right, it’s unethical to use electricity profligately, even if it’s free!  Yet, that’s our electricity that we made, without polluting, on our very own roof.  It’s ours… Or is it, after we have fed it onto the grid?  It’s a puzzle for sure.  We don’t really have a way to use all that electricity, so it’s not really a question of going to the dark side entirely.  It’s more like, is it ok to boil a whole kettle of water when we only want one cup of tea? – And I don’t mean that metaphorically!

Posted by: Li Ling Young | February 15, 2013

Circus buried in the walls

Yesterday I had an opportunity to have a look at a very old Burlington house in the middle of a rehabilitation project.  The interior has been gutted and a very patient carpenter is slowly rebuilding everything from the bathroom floor to the bedroom ceiling, which drops about 8 inches from front to back.  In the attic apartment the inside of the walls were strangely colorful.  I didn’t have a chance to examine them until all the business was done, but what I discovered is that the boards had giant circus advertisements glued to the inside.  Sadly they were in tatters, and they’ll probably end up getting buried back in the wall when the project is done.

IMG_2789

IMG_2792

IMG_2791

IMG_2790

Posted by: Li Ling Young | February 9, 2013

The Furnace Is Gone

This house was in pretty good shape when we bought it.  There had been some unfortunate indoor painting, but the previous owner had kept good records and appears to have cared for the house well.  A sticker on the furnace showed decades of annual maintenance visits.  A furnace that is cleaned and tuned each year not only operates cleanly and efficiently but also has somebody keeping an eye on the condition of the furnace.  The burner had been replaced in the last few years.

Oil burner

Old furnace, new burner

Our long term plan did not involve fossil fuel, so the furnace was to be no more than a bridge while we figured out our dream heating system.  We bought the house with half a tank of home heating oil.  That gave us a timeline for getting something new in place.  I didn’t want to buy any more fuel but the cheapskate in me also didn’t want to leave unused the fuel we already had.  I hoped, but couldn’t really know, that the half-tank would last us through the heating season after the insulation improvements.

In August the local woodstove shop had a sale, so we went down and talked to the folks at the Chimney Sweep.  Since we were asking some pretty penetrating questions our salesperson handed us off to the guy who knows the most.  Indeed he had many good insights and helped us select a stove that would burn cleanly and could heat the house.  With our woodstove in place by mid September we felt certain we could stretch the oil out to last the whole season.  We broke in the stove, but mostly used the furnace to heat the house on the chilly-but-not-cold days of fall.

Both Nik and I know lots of people in the heating and cooling business.  I called up my favorites, Vermont Energy Contracting and Supply, to schedule a clean and tune.  These guys treat their employees well and have made a specialty out of high end systems.  It’s run by a couple of cerebral guys: a refreshing alternative to the blockheads one sometimes finds in the plumbing-related industries.  They’re busy people and I couldn’t get on their calendar until late in November.

After almost 3 months of using the oil furnace, the maintenance technician came out to have a look.  He discovered that the refractory chamber, where the burner shoots the flame, had collapsed.  Bummer.  Furnace totally unusable.  And since we had no intention of heating with that furnace in the long run there was no question of getting it repaired.  The furnace was 40 years old and we we should have expected something like this.

oil pump and meter

Leroy pumping oil out of the tank while his helper removes the fill pipes

The folks at Vermont Energy Contracting and Supply connected us with a guy who removes oil tanks in his spare time.  They are big, so you really need a pro, and I was later to find out that they are considered hazardous waste, so you need a pro.  Leroy Brace showed up around 3pm with a helper.  They pumped the fuel oil out of the tank and measured it.  We had just enough oil in there that the value of the oil would cover the cost of removing the tank.  Leroy takes care of all that, so it’s “free” to us.  They were very careful not to spill any of the oil, which is good because that would have made the house smell like oil for years.  They removed the fill pipes in the garage.  Next I knew they were maneuvering the tank, whole, through my kitchen.  Still no spills.  Outside they strapped the tank to a trailer, settled up and drove away.  Done before dark (remember, it’s December on the 45th parallel).

Good-looking 40-year old furnace.

Clean on the outside, dirty on the inside. You know this is a well-maintained furnace because the stickers show decades of regular tune ups and the service technician has left an extra belt for the next time the blower belt blows.

Now we have an empty corner where once the oil tank lived.  Also, it’s now possible to insulate that corner.  Nik got inspired by the sight of an empty corner, so a couple of days later he and one of his colleagues spent an afternoon getting the furnace and ductwork out.  That didn’t go so clean.  The inside of 60 year old ductwork is pretty cruddy.  So, now we have a lot more space in the basement, more room overhead, a fossil-fuel-free house and no heating system.

Oil furnace heat exchanger

Here’s the heat exchanger from inside the furnace ready to be hauled away.

Woodstove, it is your hour.  We have been heating since November with the woodstove.  For the most part we’re comfy.  We’ve developed a good system involving the kids doing the clean, safe work and the adults doing the stuff that’ll wreck your lungs and burn the hair off your arms.  This isn’t the way we want to heat our home over the long term.  We’re working on an automated heating system that will do everything except keep the house comfy during the coldest times of the year.  Fortunately, that’s when the woodstove really shines, so our two heat sources will work nicely together.  We look forward to consuming less wood, making less smoke in the neighborhood and having less cleaning and hauling.  But for this year, with sunny days ahead and  the end of the heating season in sight, I think we’ll make it, even without the furnace.

« Newer Posts - Older Posts »

Categories