----- Original Message ----- From: <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Thursday, October 25, 2001 2:53 PM Subject: Re: [biofuel] running a house from a generator
> Hello everybody, > > My idea is like Krik's, to generate electricity on demand. This seems > to me somewhat more efficient then charging batteries. The problems > are known about low charging rates. But WHY do you want to charge > such a huge battery bank? It's too expensive I think! > If you would generate electicity only on need then you would avoid > any storage and converting losses also need of equipment. Two group > of consumers to be defined : small(-continous) and big(-occasionally). > The small users are supplied from a battery bank. They are e.g. the > lights, radio, TV, etc. You can also use low voltage (12-24) > appliancies. In this way you avoid the need of inverter... > If you are planning to switch a "big" consumer on, you have to start > the generator before which then gives you directly the 220-380V AC. > You may use a remote switchboard with some feedback from the > generator. While the generator is on it generates hot water and > charging the batteries for small consumers too. > So far is the idea. What has to be calculated is the energy balance > between hot water, direct AC and battery charging. But I assume that > this is a minor problem.. > > The only question for me is the start up procedure of a diesel > generator running on SVO. I read about the need of preheated fuel and > distributor. As a stationary generator I might manage to keep > everything warm until the next start. I suggest it would work that > way. Specially because I plan to run a big furnace (heated by straw > bales) parallel that would always give enough warmth for start up.. > > Any idea, suggestion, remarks, citicism are welkom! > > çkos > --- In [EMAIL PROTECTED], "kirk" <[EMAIL PROTECTED]> wrote: > > You run the alternator and charge batteries to provide only small > loads. You > > schedule your loads in other words. > > Washing machine is run when engine/alternator is run. This places > hot water > > demand in phase with generation, a good thing too. > > Don't forget-- not only are batteries unhappy with high rates, > depth of > > discharge is very critical too. It is a good idea not to exceed 50% > depth of > > discharge if you want long life from battery bank. > > Rate of charge changes with depth of discharge. You can charge > heavily at > > first. > > Net metering is the best way to go if the grid stays up. > > If you are off grid and want to use standard appliances a "48 volt" > system > > is normally the most cost effective. > > Infinite volts or infinite current is obviously wrong. You have to > choose an > > intersect where things trade off best. > > > > Kirk > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > Sent: Sunday, October 14, 2001 7:48 AM > > To: [EMAIL PROTECTED] > > Subject: Re: Re: [biofuel] running a house from a generator > > Sensitivity: Confidential > > > > > > 4.6 is not a lot but it should not take 46? > > to supply 10k per day > > > > > > From: "steve spence" <[EMAIL PROTECTED]> > > > Date: 2001/10/14 Sun AM 09:36:33 EDT > > > To: <[EMAIL PROTECTED]> > > > Subject: Re: [biofuel] running a house from a generator > > > > > > 4.6 if at 12volts. > > > > > > but that won't supply 50 kWh > > > > > > Steve Spence > > > Subscribe to the Renewable Energy Newsletter: > > > http://www.webconx.com/subscribe.htm > > > > > > Renewable Energy Pages - http://www.webconx.com > > > Mirror Site http://www.webconx.dns2go.com/ > > > [EMAIL PROTECTED] > > > (212) 894-3704 x3154 - voicemail/fax > > > We do not inherit the earth from our ancestors, > > > we borrow it from our children. > > > > > > ----- Original Message ----- > > > From: <[EMAIL PROTECTED]> > > > To: <[EMAIL PROTECTED]> > > > Sent: Sunday, October 14, 2001 9:24 AM > > > Subject: Re: [biofuel] running a house from a generator > > > > > > > > > > How many 900 amp batteries does it take to make 50 kw? > > > > > > > > > > From: "manuel cilia" <[EMAIL PROTECTED]> > > > > > Date: 2001/10/14 Sun PM 05:32:47 EDT > > > > > To: <[EMAIL PROTECTED]> > > > > > Subject: [biofuel] running a house from a generator > > > > > > > > > > I have been running my farm house from a generator/battery > setup for > > > over a > > > > > year now and it is great but not with out its problems. > > > > > > > > > > The average house energy efficient home will use between 6Kw > and 10Kw > > > per > > > > > day assuming your hot water is gas/solar and your cooking is > gas. > > > > > > > > > > The problem is with the batteries. A battery (deep cycle) can > only be > > > charge > > > > > up at 10% of its value without risking damage to them. > > > > > > > > > > You must remember that the batteries take all the load and the > > generator > > > > > simply charges the batteries. The power to house is supplied > through > > an > > > > > inverter. > > > > > > > > > > If you use 10Kw/day then you can only put in 1Kw per hour > into the > > > > > batteries, therefore at the quickest it would take 10 hours > to replace > > > what > > > > > you took out in that day. > > > > > > > > > > Therefore if your generator is any bigger than 1kw then you > are > > wasting > > > > > fuel. > > > > > A way to get around this problem is to have bigger batteries, > so if > > your > > > > > generator is rated at 5kw then you need 50kw of batteries > (very > > > expensive). > > > > > but you would only need to run your generator for 2 hours a > day. > > > > > > > > > > Remember just because the fuel is free we shouldn't waste it. > > > > > > > > > > Mani > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > > > > http://journeytoforever.org/biofuel.html > > > > > Please do NOT send "unsubscribe" messages to the list address. > > > > > To unsubscribe, send an email to: > > > > > [EMAIL PROTECTED] > > > > > > > > > > Your use of Yahoo! Groups is subject to > > > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > > > http://journeytoforever.org/biofuel.html > > > > Please do NOT send "unsubscribe" messages to the list address. > > > > To unsubscribe, send an email to: > > > > [EMAIL PROTECTED] > > > > > > > > Your use of Yahoo! Groups is subject to > > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > > http://journeytoforever.org/biofuel.html > > > Please do NOT send "unsubscribe" messages to the list address. > > > To unsubscribe, send an email to: > > > [EMAIL PROTECTED] > > > > > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > Please do NOT send "unsubscribe" messages to the list address. > > To unsubscribe, send an email to: > > [EMAIL PROTECTED] > > > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > > > > > > > > --- > > Incoming mail is certified Virus Free. > > Checked by AVG anti-virus system (http://www.grisoft.com). > > Version: 6.0.281 / Virus Database: 149 - Release Date: 9/18/2001 > > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > Please do NOT send "unsubscribe" messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > ------------------------ Yahoo! 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