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windblown Newbie Joined: 25/03/2010 Location: United StatesPosts: 8
Posted: 05:37am 25 Mar 2010
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Hello fellow green power folks. Im new here to the forum and to green power. I have researched alot of info over the net. But I can not find an answer to this question I have. So here it is, Can I use a...
PACIFIC SCIENTIFIC MOTOR?
VOLTS-220 AMPS-12 HP.-3.2 RPM-3400 DUTY-CONT.
FIELD-PM. IP-20. ENCL-OPEN. WATTS-2386 FF-1
MODEL NUMBER-PWM3652-5458-2
I KNOW FROM MY RESEARCH THAT i TAKE VOLTS AND DIV. IT BY THE RPM'S. This gets 0.064. and if im correct next I would take 3400rpm and multiply the 0.064 to equal total volts. this is 115.6.
Can I use this motor? It was free. So no loss if I cant.Windblown
DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65
Posted: 05:44am 25 Mar 2010
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yes you need a fast blades...good job,
windblown Newbie Joined: 25/03/2010 Location: United StatesPosts: 8
Posted: 06:07am 25 Mar 2010
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Would it work for low to medium wind conditions or would I need to gear up? Thanks DTVWindblown
DTV004 Regular Member Joined: 30/04/2009 Location: United StatesPosts: 65
Posted: 06:24am 25 Mar 2010
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no no need for gears i thing you will have close to 50v on 200rpm so the blades need to be big and fast rpm don't waste the money on small blades the bigger the better ..good look.
GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127
The important aspect is the current. Without rewiring, the windings can only safely handle the full load current, without eventually burning out.
The power output is proportional to alternator rpm.
220V @ 3400rpm, gives 22VAC @ 340rpm. OK for a 24V battery, giving 12A. this equates to approx 250W, at the 340rpm.
these motors usually have samarium cobalt magnets, and have high temp ratings. Unfortunately, the rotor is a small dia, and usually has 4poles. mine have, not in a windmill, but in my collection of motors.
good for a smallish windmill.
Gordon.
BTW, I tried rewiring, and these have overlapping windings, so they need to be in series. Major work to rewire without independent rectification.
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KarlJ Guru Joined: 19/05/2008 Location: AustraliaPosts: 1178
Posted: 03:44pm 25 Mar 2010
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cool about 1/2 an F&P go for a 2-2.3m diameter and she'll hammer out 250W in reasonable windsLuck favours the well prepared
windblown Newbie Joined: 25/03/2010 Location: United StatesPosts: 8
Posted: 04:08pm 25 Mar 2010
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Thank you all for helping me figure out this motor. Love the forum.Windblown
windblown Newbie Joined: 25/03/2010 Location: United StatesPosts: 8
Posted: 09:32pm 30 Mar 2010
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Help. Going nutz. Im trying to figure this out...
(1)I have a avg. daily usage of 53.32kwh.
(2)What size inverter needed.
(3)How many batt's.
(4)And what kind of power do I need to keep batt's charged?
I may have the answers and just dont know it. Please help.Windblown
GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127
Posted: 10:00pm 30 Mar 2010
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I just don't get it.
Are people competing for the max avg power consumed award?
Do something about the consumption. Reduce it to about 10kWhr/day.
I know of a family with a disabled child, living OFF grid. They barely mannage on 4kW of solar and 2.5kW windmill, and 70kWhr battery, and backup generator. Approx $100,000 investment.
You are talking about a system 5X this size.
Learn to use less power is the start. You are not talking anything DIY.
Gordon.
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windblown Newbie Joined: 25/03/2010 Location: United StatesPosts: 8
Posted: 11:20pm 30 Mar 2010
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We run a oxygen concentrator 24/7 for disabled mom and dad and have a welding shop at home for our company thats why the hi 53.32 KwH usage. I would like to power the house, not all the equipment. Not looking to get off grid, just increase green power. Not competeing for anything, just keeping my parents around a little longer. Thank you. I need help with my origonal question, not a compitition.Edited by windblown 2010-04-01Windblown
GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127
Posted: 05:56am 31 Mar 2010
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Sorry to have a dig, but I did mention that the $100,000 system was for the needs of a disabled person.
You made no mention of your consumption breakdown, and I assumed the fig you gave, was for a home, as there was no other info. Maybe if you worked out the needs of the oxygen system, and put that up, then forum members may give a more favourable response.
I had an aunt 'rip' who was reliant on one of these units. I know how much power was needed at higher oxygen supply rates.
BTW. I think Karl, has answered your original question.
I would not run essential services from a battery. You may just need a grid connected solar for a start. On the windmill side, you may just be better to have a small battery, with small inverter, to power items that you can plug in as needed. It may not be viable to grid connect a small windmill system. 1kW is about the low limit for GTI viability. A 1kW fixed array solar can average approx 4kWhr per day, while a 1kW Windmill in OK location would tend to average approx 2.4kWhr/day. A windmill can perform better at a more windy site, as can a solar panel system on a solar tracker.
Any system you build yourself will help with reducing your green footprint. Solar will probably be a better investment, unless you have a favourable wind reigime. We don't tend to live in places with a good wind classification.
Gordon.
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windblown Newbie Joined: 25/03/2010 Location: United StatesPosts: 8
Posted: 04:40pm 31 Mar 2010
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Thank you GWatPE.
I would like to put the oxygen equipment on a solar panel dedicated to it only for more dependability. Mind you im not looking to get off grid just yet. The other normal daily appliances I would like on the wind generator/solar hybrid system.
Im doing this 1 step at a time as I learn more of what I can/can't do. I found this forum to have the best folks with knowledge higher then my own about going GREEN.
What am I going to need to get say 10 to 15KwH in a wind system? IE: Does it depend on how many batt's I have our the type of inverter I use? I've been able to calculate the wind/solar type I need for charging but can't figure out what size battery bank I would need.
Thank you again to all who helps.Windblown
GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127
Posted: 10:41pm 31 Mar 2010
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Is the equipment battery powered?? Battery operated medical equipment is normally low consumption, and non essential.
For say 15kWh loading.
I would not install a battery system, unless power outages are frequent and need to be considered. You would need to provide wind statistical data to confirm viability. You will need a 5-10kW windmill, with a Grid connected inverter, for an OK to Good wind site.
If you really want a battery system, then other factors like days of autonomy, recharging facilities for low wind conditions, etc etc have to be considered.
The system I mentioned above was similar to your requirements, and was 48V, and had 1200Ah battery. This has approx 2 days autonomy, and requires an auto start backup generator. You will need to spend a lot of $ on a system. I would not consider this DIY either.
You need to consult a firm in your area that does this sort of installation, as it really is beyond the scope of this forum.
Gordon.
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windblown Newbie Joined: 25/03/2010 Location: United StatesPosts: 8
Posted: 12:11am 01 Apr 2010
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Would like the batt. bank because of pwr outages that often occour here in heavy winds and rain storms. Figured that a good batt. bank would give me a good few hr's of pwr for the concentraters. I understand the wind generator parts, but I am unclear on a decent size bank and good quality inverter. Im working on converting from 110volt lighting in house to all 12volt to lower consumption.
So I guess for about 15KwH, What would be the best batt. bank size and inverter to atleast get us heading in the right direction? We can not do a grid tie at this point in time. All on social security. Windblown
KarlJ Guru Joined: 19/05/2008 Location: AustraliaPosts: 1178
Posted: 01:29pm 01 Apr 2010
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hmmmm I bought 7KW of batteries for a 48V system for $1/AH brand new VRLA type sealed lead acid.
I would think this is good for the odd outage but certainly not off grid setup.
another good option is a 2nd hand UPS, telco's use them and often found cheapish on ebay.Luck favours the well prepared
windblown Newbie Joined: 25/03/2010 Location: United StatesPosts: 8
Posted: 12:21am 02 Apr 2010
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Thanks Karlj. Just what im looking for. Windblown
MacGyver Guru Joined: 12/05/2009 Location: United StatesPosts: 1329
Posted: 06:41am 02 Apr 2010
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KarlJ
Okay, what's a 2nd hand UPS?
. . . . . Mac Nothing difficult is ever easy!
Perhaps better stated in the words of Morgan Freeman,
"Where there is no struggle, there is no progress!"
Copeville, Texas
Tinker Guru Joined: 07/11/2007 Location: AustraliaPosts: 1904
Posted: 02:18pm 02 Apr 2010
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UPS = uninterrupted power supply, used usually for computers to forestall short power outages & give the 'puter time to shut down properly.
2nd hand = not new Klaus
Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333
Posted: 04:25pm 02 Apr 2010
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Mac, you should have known that being an American term.
Tha Austrailian navy ues to call them "No Breaks" back in the early days.
The American navy use to call them UPS.
When on tasks together the Aussies use to find it comical when the USA Navy would loose contact and later a telex encripted message would report their problem was their "UPS was Down"
Due to the different terms used for the same thing it caused some confusion.
Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.
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