Connect with us

electric heater efficiency

Discussion in 'Home Power and Microgeneration' started by james, Nov 26, 2010.

Scroll to continue with content
  1. Curbie

    Curbie Guest

    Jim,

    The tree service a talked with dumps their load as needed when their
    truck-bed fills-up, a load will contain trees from two or three jobs -
    a mich-mash of tree varieties and I would have to take what they dump.

    The chipped material looked pretty good, although I think it would
    still take 2-3 years to fully compost.

    The logs where 1 to 5' long depending on diameter (they throw those
    into the truck by hand) so that timberjack looks like just the ticket,
    along with a small log-splitter and chain-saw. Since wood wouldn't be
    my primary heat source, I don't think it would take more than one or
    two loads.

    Curbie
     
  2. Curbie

    Curbie Guest

    Morris,
    Could you explain your thinking here, I don't understand how there
    could be different outputs for a solar, or gas, or wood furnaces given
    a particular house, doesn't the house's R (or UA) value plus
    infiltration determines its heat loss? How would the outside
    temperature and wind speed effect the same house differently based
    solely on furnace type?
    I'm using TMY data to estimate worst-case conditions, but am not
    comfortable with the notion of depending solely on a DIY solar heating
    system, I think the sun is dependable, but my DIY skills…

    Do you have an opinion on solar efficiency, I'm estimating using
    general efficiencies from BIS and yahoo's solar-thermal group which
    seems to suggest that both passive and active panels are about 50%
    efficient, although active systems can loose up to another 25% through
    heat fluid transmission. I'm looking at an active system due to a use
    for "summer heat".

    Curbie
     
  3. Bob F

    Bob F Guest

    The comforters do just fine, with no energy expense.

    I also have slept in my van up at the ski area where it probably gets into the
    teens or lower. With a foam mattress and my summerweight sleeping bag, and my
    heavy down bag to pull over me when I cool off, I sleep great. Insulation rules.
     
  4. Bob F

    Bob F Guest

    I've had thoughts that a specially designed "pellet" stove to handle larger
    chunks would make good use of chipped branches for "free" heating. Chipped
    branches are always available frre in this city. Of course, you'd need a system
    of pallet baskets and a way to move them around to handle and dry the chips.
     
  5. Bob F

    Bob F Guest

    Josepi wrote:

    Is there a reason all your posts show up twice?
     
  6. Curbie

    Curbie Guest

    z,

    It's not as wooded in Nebraska as it is by you, so I would be
    dependant on a tree service company to deliver bio-mass to make
    pellets, it seems to me the minute people figured out the bio-mass had
    value it would become a commodity like cooking oil has, for the
    bio-diesel folks.

    I'm mostly interested in the logs for back-up heat and bio-mass for
    compost and am not even particularly concerned about recovering the
    substantial heat generated by the aerobic decomposition of the
    bio-mass. Jean Pain's heating method.

    I wonder how much more heat bio-mass that was pelletized and burned in
    a pellet stove would generate than the aerobic decomposition of the
    same bio-mass when labor and pelletizer energy is considered. Just
    thinking about home-scale heating not a small commercial endeavor.

    Curbie
     
  7. Curbie

    Curbie Guest

    It seems to me that you're looking at a fuel density issue which seems
    like what is being accomplished by pelletizing and it seems like the
    same thing might be accomplished by pressing the bio-mass into
    pseudo-logs for a regular wood stove with something like a modified
    log splitter???

    When I looked at pellet stoves and pelletizers, the affordable
    pelletizers being talked about where mostly designed for food pellets
    that where fed with low carbon bio-mass and the high-carbon
    pelletizers I found suitable for wood chips seemed pretty pricey to
    me.
     
  8. Curbie

    Curbie Guest

    Morris,
    Ok, I'm following your thinking there.
    That would have to be a summer trip; I'm in the very west part of the
    state and am still trying to get by with only my motorcycle. I don't
    think I've ever been accused of having a lack confidence, but I am
    looking at an active system for "summer heat" use reasons and it seems
    to me that it may not be my skills as much as anything with moving
    parts can break or wear out.
    I agree that there are lots of people who don't want to see anyone
    helped and will trash any idea that isn't theirs, the solar-thermal
    group has its share of pin-heads as does any group, but there are some
    helpful ideas out there and like here, I read there every morning.

    I don't post much there because any help I could offer would be on
    concentration and what I know about collection comes from that group
    and BIS to begin with, and that group is mostly focused on collection,
    as am I now.
    There seems to be an on-going spiting match between the passive and
    active advocates on that yahoo solar-thermal group where both side
    think they have the right plan in all circumstances, and in all
    circumstances the other plan is wrong. They seem to believe that the
    square pegs and round holes are not an issue as much as the size on
    the hammer you're using is.
    In my view, the Energy-Star rating is more about helping consumers
    consume than helping consumers conserve.
    So far the whether has been nice, I don't expect that to last much
    longer.

    Thanks,

    Curbie
     
  9. Josepi

    Josepi Guest

    Not just twice...sometimes three and four times! Geeeshhh!

    Apparently my NNTP provider had some problems and were not sending out a
    confirmation code to my reader/poster. The usenet browser tries to post the
    same one again and again until it gets a confirmation. This used to happen
    frequently in Usenet groups years ago.

    My apologies for this. Irritating as hell for me too.



    Is there a reason all your posts show up twice?





    Josepi wrote:
     
  10. This also depends on the particular tariff of the electricity
    supplier. Lots of utilities price their second and third... tier
    winter residential electrical tariff very cheaply--resulting
    in electricity being competitive with other fuels for heating--
    simply so they can sell their baseload capacity.
    When propane prices shot up a couple years, heating with
    electricity was cheaper in many places.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-