Brian,
Thanks for your kind words, it warmed a lot and with the right kind of energy. I am a very afraid of on site hydrogen from a security point of view. It would be a very big apparatus to control this and I think that it is too complicated for the common person. The grid is however a very good instrument for this and we can maintain industrial security, which I think is important. Otherwise, decentralization is the key to any solution and I know that most of the group members think so too. Hakan At 16:59 18/12/2003, you wrote: >Hakan, > >'No frill' grid connections would be welcome. In NJ, >net metering (in most of the U.S. also)is common for >pv systems. As it is right now, most pv system produce >too high voltage to be plugged into 120 outlets. We >are required to run the dc electricity through a dc >disconnect(code req'd), the inverter(sunny boy's 1800 >and 2500 watt most common), an ac disconnect(req'd). >It must be connected to your electric service >panel(where it is good to use an electrician) and then >must be connected to your meter. I like your 'no >frill' pv system better, but it will take more time to >work here. > >I agree with you that the grid is a great tool that >millions of mini-power plants can use. Most of the >people I speak with have a great desire to get >"off-grid" as a sense of independance. I agree in >theory, but that is just deriving from people wanting >to break away from polluting, costly centralized >utility power. think you hit the nail on the head >that the grid serves a great purpose. Different homes >have different resources. Some people won't be able to >generate enough electricity for themselves, while >others may have a surplus. Solar works during the day >so we need storage. I spoke with an electricician last >night and he believed that we will eventually all >produce our own elecricity off-grid and store it on >site in hydrogen fuel cells. I like the possibility of >using renewable energy to isolate hydrogen and also >like the use of hydrogen for longer term storage of >electricity. > >In NJ, state rebates pay for up to 70% of a solar >electric system and 60% of a winf electrci system up >to 10kw(dc) in size. It really makes solar and wind >much more affordable. Thanks for all of your articles >and other information > >Brian > >--- Hakan Falk <[EMAIL PROTECTED]> wrote: > > > > Brian, > > > > PV is getting more efficient and the 8-10% > > efficiency cheaper, so let us > > hope that we get the 60% price reduction on PV that > > is necessary for it to > > really take off. It should of course be combined wit > > easy "no frill" grid > > connections. It will make a lot of difference, but > > maybe not that much on > > solar AC with PV cells, that must be a low priority > > and thermal solar will > > be interesting. > > > > Did you read this that I posted a short while ago, > > > > Plug-in HVAC Cogeneration. > > ><<http://energy.saving.nu/plugin/hvacpump.shtml>http://energy.saving.nu/plugin/hvacpump.shtml>http://energy.saving.nu/plugin/hvacpump.shtml > > > > > > > > I also did this, which has to be revised and > > improved. It was written in a > > haste and need to be more descriptive, > > > > Moving energy/temperatures for HVAC. > > ><<http://energysavingnow.com/hvac/energymove.shtml>http://energysavingnow.com/hvac/energymove.shtml>http://energysavingnow.com/hvac/energymove.shtml > > > > > > > > Did not have too much feedback on it, other than the > > fair comment, of that > > the latter was unclear and not good. Geothermal, as > > you define it, is heat > > pump technology and the "geothermal" is only one > > part of this and because > > that the constant earth temperature is often at this > > optimum temperatures > > for heat pumps. It is a question of cost effective > > and balance. In an area > > like Florida or most of Spain, the air temperatures > > are most of the time in > > that range and to use the earth temperatures might > > not be cost efficient. > > In Sweden, you have to use "geothermal" for heat > > pumps, otherwise the heat > > pumps are not effective a large part of the year. > > > > As a solar installer, I like your comments on this, > > > > Plug-in Solar power. > > > <http://energy.saving.nu/plugin/pluginsolar.shtml>http://energy.saving.nu/plugin/pluginsolar.shtml > > > > and this, > > > > "The Grid". > > <http://energy.saving.nu/thegrid/>http://energy.saving.nu/thegrid/ > > > > Sorry if I take the opportunity, but it is always > > interesting with feedback > > that is other than my natural deficiencies in > > English, even if they are > > very valuable also. > > > > > > Hakan > > > > At 03:12 13/12/2003, you wrote: > > >Solar electric is becoming a little more efficient. > > >Sharp has a 185 watt panels that has cells w/ an > > >efficiency of 17.48% (the whole module is 14.23% > > >though) (yeah, I'm a solar electric installer). > > >Do any of you consider geothermal for heating and > > >cooling??? Relies on the constant temperature(about > > 55 > > >degreesF in NJ) that exists just a few feet in the > > >ground. In terms of energy input, the systems > > >advertise that they are 300% efficient. > > >--- Hakan Falk <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > > > >David, > > > > > > > > > >The last 20 years I bought an AC unit per year > > on > > > > average here in Spain, > > > > >always reversible to heat pump. I am a little > > bit > > > > lazy and found a very > > > > >good dimensioning method. Instead of > > calculating, I > > > > have used the known > > > > >margin of error in existing methods. > > > > > > > > > >I ask the sales person what he recommends. He > > will > > > > do some sort of > > > > >calculation and look in tables, then he would > > look > > > > at me with "the expert > > > > >look" and suggest for example 3,000 watt (never > > > > smaller), then I will look > > > > >equally seriously and buy the 1,000 Watt. He > > will > > > > always say that in that > > > > >case he cannot guarantee that it will work and > > I > > > > will always reply that it > > > > >doesn't matter. > > > > > > > > > >In the 20 cases I have never had a capacity > > > > problem. I had some problems > > > > >with functionality, but that is expected with > > AC > > > > units who have an average > > > > >life span of 8 years (rotary compressors). > > > > > > > > > >Hakan > > > > > > > > > > > > > > >At 20:15 12/12/2003, you wrote: > > > > > >Hi Hakan, > > > > > > > > > > > >I'm not familiar with any companies > > succeeding in > > > > this field. (except > > > > > >special projects companies working on gov't > > > > subsidized systems) > > > > > > > > > > > >I would like to see solar ac find some > > > > economically feasible > > > > > >markets. Will take some good engineering and > > > > creative thinking (to find > > > > > >the right market) > > > > > > > > > > > >David B. 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