Recent content by circus

  1. circus

    My 2nd solar furnace just finished with video.

    Larger surface area doesn't collect more heat, it's transfers more heat to the air. Runs cooler so less conductive and radiant loss, boosts output.
  2. circus

    My 2nd solar furnace just finished with video.

    I suppose if all the doors and windows were left open for two day the bottles would freeze and I'd have a hell of a time reheating but that would be the least of my problems. Burst water pipes. The water bottles are in the living space buffering the temp swings. Days are 80 instead of 95...
  3. circus

    My 2nd solar furnace just finished with video.

    Roof overhang, an awning and deciduous trees keep them shaded. The glancing sun angle also produces little heat. The first year I did seal the plastic to the vents with magnetic strips but found it was not needed.
  4. circus

    My 2nd solar furnace just finished with video.

    My different take on solar hot air. No fans, thermal mass, high temperatures, ducting, electricity, nightly heat loss, monitoring. Only problem was the temperature swings, tired of only wearing underwear when -10° outside, solved with 1500 two liter water bottles (thermal mass) stacked against...
  5. circus

    Solar panel

    Yes but it would have to be a completely separate system sharing only the battery.
  6. circus

    Solar panel

    There is no maximum that I know of, within reason. Too much solar would just be wasted.
  7. circus

    The Big Misconception About Electricity

    But if not confined by the math and tools, strictly for engineering purposes, having ones mind blown is fun. Eric Dollard
  8. circus

    Solar Porch Air Flow

    A valve made of a plastic shopping bag covering a screen would suffice. Automatically prevents cold drafts whenever the porch is cooler than the house. Day or night. The lower one is the most important. Close the window if you want.
  9. circus

    Solar Porch Air Flow

    No need for ducting, natural convection will take care of it. Do you plan any flap valving to stop reverse convection?
  10. circus

    Have a question about passive solar heating placement

    For whoever is thinking about building a collector it's better to have lots of air flow. Cooler collectors radiate less. The 155° mentioned on the video was silly wasteful. A couple degrees above room temp is ideal.
  11. circus

    Have a question about passive solar heating placement

    Not much heat. Poorly. It sucks. Badly. Inadequate. Lousy. Unzulänglich. Awful. Dismal. Abysmal. Terrible.
  12. circus

    Have a question about passive solar heating placement

    Not much heat, but in Wisconsin the humid air comes from the south, Gulf, and isn't very cold. Bitter cold comes from the north, Canada, and is dry. Heaters works the best when needed the most.
  13. circus

    Have a question about passive solar heating placement

    Been using passive solar for years https://diysolarforum.com/threads/heating-my-shed-office-off-solar.30381/page-2#post-370259
  14. circus

    The Big Misconception About Electricity

    Wouldn't be the first time humans exploit "it" without understanding what "it" is. Until then, clumsy nonsensical models is the norm. Makes you wonder what other phenomena is out there that we're oblivious to.
  15. circus

    Battery Prices Rising - Should I buy now?

    Buy now or later? Will the price go down from expiring patents and shipping problems solved or go up from printing press inflation? My guess is both. Save your money and keep your options open.
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