Posted by bw on February 11, 2009, 11:35 pm
>I live in California (San Fran area)
> My electrical usage (kWh) per month is as follows:
> 1011 Average (24 month)
> 627 Minimun over the last 24 months
> 1458 Maximun over the same period
> I have gotten 2 quotes for PV panels mounted to the roof and there were
> between 35k and 40k.
That sounds like a good deal. If you cut your usage by 4 you would only need
a system that costs 1/4 as much.
> I know I have asked ALOT, so if you can help with anypart, please let me
> know
> Thanks!
I can easily live on 250 kWh per month, and I don't really conserve.
Posted by Jim Wilkins on February 12, 2009, 12:03 am
> I can easily live on 250 kWh per month, and I don't really conserve.
145 KWH + 33 for hot water last month. I do conserve but also run some
machine tools occasionally.
Posted by daestrom on February 12, 2009, 11:56 pm
David Williams wrote:
> -> night, but it just isn't as comfortable. If our windows weren't
> -> sliders, I'd put an air conditioner in the bedroom and leave the
> main
> -> unit off a lot more. I've considered a mini split to take of the
> -> bedroom, but that's about the only way I can think of to reasonably
> -> handle the task. I don't really care if it is 78 or 80 during the
> -> day, I can get fairly cool under a fan. At night, though, that is
> -> something different.
> Why not have a fan in the bedroom? I have one that blows right down on
> the bed. Unless you're shy, of course!
For me, sleeping with a fan blowing on me causes my eyes to dry out (even
asleep). I wake up with burning sensation in my eyes that lasts all day.
I use a fan sometimes, but I have to aim it a bit 'southerly' to avoid my
face.
daestrom
Posted by Chris Hill on February 13, 2009, 2:28 pm
On Thu, 12 Feb 2009 17:45:13 -0600, david.williams@bayman.org (David
Williams) wrote:
>
>Why not have a fan in the bedroom? I have one that blows right down on
>the bed. Unless you're shy, of course!
I just don't care for a breeze blowing right on me. Different tastes,
I suppose.
Posted by ransley on February 14, 2009, 7:01 pm
> I live in California (San Fran area)
> My electrical usage (kWh) per month is as follows:
> 1011 Average (24 month)
> 627 Minimun over the last 24 months
> 1458 Maximun over the same period
> I have gotten 2 quotes for PV panels mounted to the roof and there were
> between 35k and 40k.
> So I have been doing some research. It looks like a very viable solution is
> using 1 or more parabolic troughs, heating oil, to create flash steam and
> then this would be powering a tesla turbine, which would then be attached to
> a brushless induction generator
> I have several issues that need to be resolved before I can start designing
> the system.
> Ideally, I would like to over produce during the day, and store in batteries
> and also feed into the grid.
> I would probably add the battery system in a later phase.
> I need to find out how large of a system I would need.
> I feel that if I spend a little more in the construction of the collector,
> it would well pay for it self later on. I would probably create a first
> layer mirror by having a polished piece of steel (4ftx8ft), silver plated.
> The steel would be fairly thin and therefore easy to work with. I feel that
> this would give me the highest effecienty. This would be using the lower
> portion of the parabolic curve and thus being faily flat with a focal point
> about 8"-12" above the bottom
> This would be enclosed in a glass topped case with the focal point aimed at
> the oil filled tube.
> -or purchase a trough if I can find one, which I have NOT been able to do.
> Any ideas where?
> What I need to do is to try to figure out the size of generator that is
> needed, how much power will be needed to produce the power I need, then
> working backwards, figure out the size of turbine I should be using, and
> then how many collectors I would need.
> I know that there are general guidelines and formulas to figure this stuff,
> but in all of my research, I have not been able to find this.
> A few other peices of info I also need are where would be a good starting
> point to have the plates for the turbine laser cut? I am feeling I probably
> will be settling on a disk radia of about 10", but need to figure out how
> many plates. from my research 10" will develope more HP at a lower RPM, yet
> have more torque. Hard to start though...
> I know I have asked ALOT, so if you can help with anypart, please let me
> know
> Thanks!
What do you run, I get by fine on 150- 175kwh a month when AC is not
on. You need to start by lowering consumption. PV and wind would be my
choise.
XML site map
> My electrical usage (kWh) per month is as follows:
> 1011 Average (24 month)
> 627 Minimun over the last 24 months
> 1458 Maximun over the same period
> I have gotten 2 quotes for PV panels mounted to the roof and there were
> between 35k and 40k.