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16528Re: [SB-r-us] Digest Number 2874

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  • Jim Carfrae
    Jun 30, 2014
    • 0 Attachment
      I'm sorry, but I'm away until Tuesday 1st July

      On 30 Jun 2014, at 09:39, SB-r-us@yahoogroups.com wrote:


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      >
      > Straw Bale Social Club Group
      >
      > 1 Message
      > Digest #2874
      >
      >
      > 1a
      > Re: May 2014 was hottest May on record by "Sherwood Botsford" sherwood.botsford
      >
      >
      >
      > Message
      > 1a
      > Re: May 2014 was hottest May on record
      >
      > Sun Jun 29, 2014 6:59 am (PDT) . Posted by:
      > "Sherwood Botsford" sherwood.botsford
      >
      > The ratio between available solar and available wind area depends a bunch
      > of factors.
      >
      > A: Size of unit.
      >
      > Solar power costs are fairly linear once you get above about one KW. If
      > going from 1 to 2 kw costs 2000 bucks, then so will the increase from 4 to
      > 5 KW. It also lends itself to incremental increases,.
      >
      > Wind power gets MUCH cheaper with larger units. Larger units are on larger
      > towers. Which are taller and get into the wind that blows with more
      > consistency.
      >
      > B: Location
      >
      > Where I live is, I think, class IV. Average wind speed of 4-5 m/s. It's
      > barely worth installing wind here unless you have to be off grid. South of
      > here, at Pincher Creek, the wind blows so hard and steady that local trees
      > are flagged -- branches only grow on the downwind side.
      >
      > We get pretty steady sun in summer. And often when it's bitter cold in
      > winter we have good sun for the few hours we have any sun. (Latitude 54
      > degrees)
      >
      > Wind and solar complement each other very well here. Winter is worst for
      > sun, but best for wind.
      >
      > ***
      >
      > Grid connection: We have a pretty good setup now for grid connected net
      > metering. If you are doing that, it makes the most sense to install as
      > much solar as you can afford, and optimize it for max production over the
      > year. (Solar is much cheaper per KW to install until you have run out of
      > roof.)
      >
      > Storage: There's the rub. At present storage starts to get unreasonable
      > when you are talking about more than a single day's power. Some of the new
      > technology involving flow through batteries (You have 4 tanks for
      > electrolyte, and they move through the battery by pumps.) decouple the
      > power rating and energy capacity. But such setups are large, expensive,
      > and you better be a good plumber.
      >
      > A breakthrough in storage that allowed you to store a week's worth of power
      > in a closet; one that maintained the charge for a couple months, and had in
      > indefinite number of charge/discharge cycles, and cost under $100/kWh to
      > install would change the world.
      >
      > Respectfully,
      >
      > Sherwood of Sherwood's Forests
      >
      > Sherwood Botsford
      > Sherwood's Forests -- http://Sherwoods-Forests.com
      > 780-848-2548
      > 50042 Range Rd 31
      > Warburg, Alberta T0C 2T0
      >
      > On 28 June 2014 14:26, ndgray@... [SB-r-us] <
      > SB-r-us@yahoogroups.com> wrote:
      >
      > >
      > >
      > > Somewhere I remember reading that one night's wind was worth three days of
      > > sun in your battery bank.
      > > I too remember those discussions. I wonder what those folks are thinking
      > > now that climate chaos is virtually undeniable, not that many don't still
      > > try. David Gray
      > >
      > > Sent from my iPad
      > >
      > > On Jun 26, 2014, at 3:44 AM, "Frank Tettemer frank@...
      > > [SB-r-us]" <SB-r-us@yahoogroups.com> wrote:
      > >
      > >
      > >
      > > Well stated, Derek. Thanks for bringing that up.
      > >
      > > One of my OCD traits has been to watch the weather, for the past fifty
      > > years.
      > > We've had a lot of trends to consider and observe.
      > >
      > > In the early seventies, solar heating was a daily possibility, all
      > > Winter long, after the cloudy period of November and December, during
      > > freeze-up. After freeze-up, all the moisture was "frozen" out of the
      > > air; it was clear, non-cloudy, and cold.
      > >
      > > In 1995, I had observed a change in the amount of Winter sunlight in
      > > Ontario Canada. I started telling inquiring minds to put their interest
      > > in wind power and less in solar power. I was predicting then, that the
      > > weather was becoming more and more unsettled, (windy), and less and less
      > > clear and sunny.
      > > Through the sixties , seventies, and eighties the trend was towards more
      > > and more cloud cover, through January into March. This had
      > > traditioonally been very cold and clear and sunny, with temps rising to
      > > -15 C in daylight, and -20c to -30C at night.
      > >
      > > It was easy to get most all our home electricity from photo voltaic
      > > panels all Winter, after freeze-up, when the air turned crisp, clear and
      > > cold.
      > >
      > > These current days it is very different. These days, it is mostly cloudy
      > > all Winter, and cloudy even in the Summer, here in the previously crisp
      > > and crystal-clear North Country.
      > > These days, we get over fifty percent of our household electrical supply
      > > from our 13' diameter wind turbine, and less and less from our 1800 watt
      > > photovoltaic array.
      > >
      > > /"Put your money in Wind, sonny-boy. But make sure that there tall tower
      > > is built stronger than you'd think"/.
      > > That's my "sage" advice of 2014.
      > >
      > > --
      > > Frank Tettemer
      > > Living Sol ~ Building and Design
      > > www.livingsol.com
      > > 613 756 3884
      > >
      > >
      > >
      >
      >
      >
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