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re: "zero-energy houses"
31 may 2004
joe bramblett, kd5nrh wrote:
>>>a typical "zero-electrical-energy house" can be expensive, with
>>>a $40k pv system. has anyone ever built a true zero-energy house,
>>>if we include fossil fuels
>>
>> that's easy! just place it in a location where you don't need
>> heating! 8*}
>
>welcome to central texas.
sounds like a start, but do the pvs produce as much energy
as the gas or propane water heater uses? fsec estimates no,
even if it's a solar water heating system with fossil backup.
a house might easily use 20 kwh/day of gas for water heating,
ie it might have a 4 kw array just for that energy, or an
ac desuperheater (although they do not seem to be part of
the "zeh" program.)
nick
tired of iraq? do something about it. learn to halve your energy use
while having fun with math and science.
join solar guru steve baer and pe drew gillett and phd rich komp and
me for an all-day workshop on solar house heating and natural cooling
strategies ("hvac nonsense") on july 9 in portland, or--see page 25 of
http://www.ases.org/conferences/2004_call_for_papers/solar2004_prelim_program.pdf
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