Archive for the ‘indoor solar lights’ Category

How can I utilize a solar panel to power up a light?

Tuesday, October 20th, 2009

I have a 450 watt light/lamp that I use for indoor gardening (this is a grow light). I want to be able to use the solar panel to convert the sun’s solar energy and be able to plug my 450 watt light/lamp to this solar panel. How would I accomplish this?
If you could also be specific in your answers ; how many watts in a solar panel should I be buying? I haven’t bought the solar panel yet.

I.E : Canadian Tire has a 10 watt solar panel for $90. Will this work? Check out the link.

http://www.canadiantire.ca/AST/browse/Green/EnergyConservation/RenewableEnergy/PRDOVR~0111895P/Eliminator%2BSolar%2BPanel%252C%2B10W.jsp

First, figure out how many hours you want to run the lamp. Lets say ten hours for a nice, round number. That times 450 watts gives us 4500 watts of required energy.

That little 10 watt panel would need to run 450 hours to give you that much energy. I would recommend getting a 450 watt panel which, if in full sunlight for 10 hours would give you the energy to power your light for ten hours at night.

You also need batteries that will store enough energy to power your light for the required time.

Now, here comes the expensive part. You will need 4500 Watt/hours, which when divided by 12 volts (car battery), means you need 375 Amp hours in battery capacity.

I use semi truck batteries which give you 200 Amp hours each at 12 volts. These run about $350 each.

And you need an inverter that provides at least 500 watts continuous power.

In summary. 450 Watt solar panel, 2x 200Ah semi truck batteries (or 4x 100Ah marine deep cycle batteries) and a 500 watt inverter.

If you want to save on batteries, I get them for $10 each. I go to semi truck repair shops and pay the core charge for sulfated batteries. Look for batteries with no outward, visible damage and that are less than a year old. I use a special battery restoring charger that brings them back into service. See link below.

What do you think of this story? What would your response to it be?

Saturday, October 10th, 2009

This story was made in1977.

The Nightmare Life Without Fuel

Americans are so used to limitless energy supplies that they can hardly imagine what life might be like when the fuel really starts to run out. So TIME asked Science Writer Isaac Asimov for his vision of an energy-poor society that might exist at the end of the 20th century. The following portrait, Asimov noted, "need not prove to be accurate. It is a picture of the worst, of waste continuing, of oil running out, of nothing in its place, of world population continuing to rise. But then, that could happen, couldn’t it?"

So it’s 1997, and it’s raining, and you’ll have to walk to work again. The subways are crowded, and any given train breaks down one morning out of five. The buses are gone, and on a day like today the bicycles slosh and slide. Besides, you have only a mile and a half to go, and you have boots, raincoat and rain hat. And it’s not a very cold rain, so why not?

Lucky you have a job in demolition too. It’s steady work.

Slow and dirty, but steady. The fading structures of a decaying city are the great mineral mines and hardware shops of the nation. Break them down and re-use the parts. Coal is too difficult to dig up and transport to give us energy in the amounts we need, nuclear fission is judged to be too dangerous, the technical breakthrough toward nuclear fusion that we hoped for never took place, and solar batteries are too expensive to maintain on the earth’s surface in sufficient quantity.

Anyone older than ten can remember automobiles. They dwindled. At first the price of gasoline climbed—way up. Finally only the well-to-do drove, and that was too clear an indication that they were filthy rich, so any automobile that dared show itself on a city street was overturned and burned. Rationing was introduced to "equalize sacrifice," but every three months the ration was reduced. The cars just vanished and became part of the metal resource.

There are many advantages, if you want to look for them. Our 1997 newspapers continually point them out. The air is cleaner and there seem to be fewer colds. Against most predictions, the crime rate has dropped. With the police car too expensive (and too easy a target), policemen are back on their beats. More important, the streets are full. Legs are king in the cities of 1997, and people walk everywhere far into the night. Even the parks are full, and there is mutual protection in crowds.

If the weather isn’t too cold, people sit out front. If it is hot, the open air is the only air conditioning they get. And at least the street lights still burn. Indoors, electricity is scarce, and few people can afford to keep lights burning after supper.

As for the winter—well, it is inconvenient to be cold, with most of what furnace fuel is allowed hoarded for the dawn; but sweaters are popular indoor wear and showers are not an everyday luxury. Lukewarm sponge baths will do, and if the air is not always very fragrant in the human vicinity, the automobile fumes are gone.

There is some consolation in the city that it is worse in the suburbs. The suburbs were born with the auto, lived with the auto, and are dying with the auto. One way out for the suburbanites is to form associations that assign turns to the procurement and distribution of food. Pushcarts creak from house to house along the posh suburban roads, and every bad snowstorm is a disaster. It isn’t easy to hoard enough food to last till the roads are open. There is not much in the way of refrigeration except for the snowbanks, and then the dogs must be fought off.

What energy is left cannot be directed into personal comfort. The nation must survive until new energy sources are found, so it is the railroads and subways that are receiving major attention. The railroads must move the coal that is the immediate hope, and the subways can best move the people.

And then, of course, energy must be conserved for agriculture. The great car factories make trucks and farm machinery almost exclusively. We can huddle together when there is a lack of warmth, fan ourselves should there be no cooling breezes, sleep or make love at such times as there is a lack of light—but nothing will for long ameliorate a lack of food. The American population isn’t going up much any more, but the food supply must be kept high even though the prices and difficulty of distribution force each American to eat less. Food is needed for export so that we can pay for some trickle of oil and for other resources.

The rest of the world, of course, is not as lucky as we are.

Some cynics say that it is the knowledge of this that helps keep America from despair. They’re starving out there, because earth’s population has continued to go up. The population on earth is 5.5 billion, and outside the United States and Europe, not more than one in five has enough to eat at any given time.

All the statistics point to a rapidly declining rate of population increase, but that is coming about chiefly through a high infant mortality; the first and most helpless victims of starvation are babies, after their mothers have gone dry. A strong current of American opinion, as reflected in the newspapers (some of which still produce their daily eight pages of bad news), holds that it is just as well. It serves to reduce the population, doesn’t it?

Others point out that it’s more than just starvation. There are those who manage to survive on barely enough to keep the body working, and that proves to be not enough for the brain. It is estimated that there are now nearly 2 billion people in the world who are alive but who are permanently braindamaged by undernutrition, and the number is growing year by year. It has already occurred to some that it would be "realistic" to wipe them out quietly and rid the earth of an encumbering menace. The American newspapers of 1997 do not report that this is actually being done anywhere, but some travelers bring back horror tales.

At least the armies are gone—no one can afford to keep those expensive, energy-gobbling monstrosities. Some soldiers in uniform and with rifles are present in almost every still functioning nation, but only the United States and the Soviet Union can maintain a few tanks, planes and ships—which they dare not move for fear of biting into limited fuel reserves.

Energy continues to decline, and machines must be replaced by human muscle and beasts of burden. People are working longer hours and there is less leisure; but then, with electric lighting restricted, television for only three hours a night, movies three evenings a week, new books few and printed in small editions, what is there to do with leisure? Work, sleep and eating are the great trinity of 1997, and only the first two are guaranteed.

Where will it end? It must end in a return to the days before 1800, to the days before the fossil fuels powered a vast machine industry and technology. It must end in subsistence farming and in a world population reduced by starvation, disease and violence to less than a billion.

And what can we do to prevent all this now?

Now? Almost nothing.

If we had started 20 years ago, that might have been another matter. If we had only started 50 years ago, it would have been easy.

I think it is a very mild projection i would have thought i might be much worse .

The aspects of a global nuclear war or the full effects of Global warming have not been included.

Such as rising seas ,which could displace millions of people ,moving them further in land ,to fight it out with the residents already there causing wide spread public violence.

Also global food and potable water shortage ,and we have since come up with many alternatives to producing power ,why did he leave out solar or wind power.

But then this story was from 1977,and even so Asimov is a master at imagining future happenings
I wonder what he would see today ,it will be a different story.
.———————————————————–
The solution to a world devoid of energy is to think backwards and improve upon it .This is what Permaculture is all about sustainable ideas from the past (only in the past can prove of sustainability be found )

So my response is teach the people about PERMACULTURE a way of life using ingenuity and innovation with limited technology or dependence on Government energy sources,derived from a collection of sustainable ideas from around the world coupled to present level of knowledge
ideally suited for those who want to get back to the country and build a auto sufficient situation for themselves and the family or a community .

People plant rather for the quality of life and to feed their families, than for the market ,so the motivation and the manner are totally different from ordinary agriculture .

Although the basic concept of Permaculture also applies to Organic and sustainable farming,

Utilizing soil management ,and mulching

The utilization of space is more concentrated ,thinking in cubic and vertical terms instead or merely horizontal on the plain ,

Having many principle to follow such as utilizing all resources and following and enhancing energy flows ,
for example the ditch around the house catches the rain water and leads it through the chicken house where it cleans and picks up the manure to deposit it in the vegetable patch

Permaculture means permanent agriculture
a concept put forward by Bill Mollison in the 60`s

Which offers practical solutions for energy systems ,infrastructure ,intelligent design in housing,
animal shelter ,water systems and sustainable agricultural practices.
With the world and it`s history as it`s source
From the chinampas of Mexico to the terraced gardens of the Andes.
From the dessert wadis to the steppes of Russia.
Covering all climatic conditions temporal, dessert, humid and dry tropics.
with chapters on soil ,Water harvesting and land design,Bio diversity
Earth working ,Spirals in nature,Trees and water ,utilizing energy flows,
Strategy for an alternative nation

including gardening tips,bio-gas,companion planting and ideas for structures ,how to cool down houses in hot climates ,how to warm up houses in cold climates with out using technology but rather by design.
————————————————————–
The Permaculture designers manual by Bill Mollison,which cost about 40 dollars.
and is the best all round book you can get,on Environmental design,.(tagiari publishing, tagariadmin@southcom.com.au)

Some other writers that are on the Internet are
David Homegrown
Larry Santoyo
Kirk Hanson

Masanobu Fukuaka has written ,
One-Straw Revolution
The Road Back to Nature
The Natural Way of Farming
Simon Henderson
and Bill Molisson.
there is a Permaculture Institute in Australia
there is also a Dry land strategy Institute in North America

Links to previous relevant answers
bio diversity

http://answers.yahoo.com/question/index;_ylt=AoHkf4Mao.pJn3xHi6xV1Pnsy6IX?qid=20070728220706AAmTdlT

organic pest control

http://answers.yahoo.com/question/index;_ylt=AhfcBgXmgqLHJDS.1hZOVA3sy6IX?qid=20070609070008AA35IZ5

growing your own

http://answers.yahoo.com/question/index;_ylt=AqLpdYrdelPnP0HiyH2wurjsy6IX?qid=20070528180353AAxQuAm

water harvesting

http://answers.yahoo.com/question/index;_ylt=AlhND.Nc1wg2D5AyfZU9NzDsy6IX?qid=20070504150425AAAwVwA

the rippling effect

http://answers.yahoo.com/question/index;_ylt=AvwaHVtzogdsI8MrfMcvhaHsy6IX?qid=20070706214424AAjgbuz

choosing a site

http://answers.yahoo.com/question/index;_ylt=An5GAG03Te7IFEFaD1XTwkfsy6IX?qid=20070711193404AAGQlW7

alternative solutions to Urban sprawl

http://answers.yahoo.com/question/index;_ylt=AksobeRFQTAnaaAr4FEBAiMAAAAA;_ylv=3?qid=20071013043017AA6wcWX

u heard of this new solar cell phone?

Saturday, October 10th, 2009

according to yahoo, China has developed a cell phone that could charge itslef when exposed to sunlight or just even indoor lights. its like 500 sumthin dollars but they are thinking about developing more models similar and better than it before like 2009. what do u think of this?

http://green.yahoo.com/index.php?q=node/497

yes i did herad it is a perfect idea it will cool because it will greener and also we wont have to worry about chargin it

What would be a great gift for that "special someone" who is not really "that bright"?

Thursday, October 8th, 2009

I was going to go out on a huge limb and purchase solar-powered, indoor xmas tree lights. In order for them to work, they need to be exposed to direct sunlight. How long before I get the irate, frustrated call?

POLL: Bacon •OR• Sausage?

HAH! That is funny!
Sausage

Do solar cells and panels run on artificial lighting as well?

Tuesday, October 6th, 2009

Are photovoltaic and solar cells the same? And same question… do they all run on indoor artificial light like calculators’ and watches’ do?

probably a little bit, but very poorly.

eg, if you had a 100w bulb, 5 feet away from a 1×1 sq ft panel, at 10% efficiency (it would really be far less), you’d get

100*0.1*1/(4*pi*5^2) =0.03 watts

that is, 100 watts in to produce 3/100 of one watt.
worse, that assumes 10% efficiency, which is likely higher than you’d really achieve.

Is anyone using small solar panels in their home with any practical results?

Friday, October 2nd, 2009

What about sources for straight forward solar powered products? Excluding toys, garden frogs and outdoorpath lights I have found few useful items for the home. What I have found are solar panels for under $100 each, inverters, rechargeable indoor lights and a few camping/RV products that are interesting. It seems to me that these could help me start to wean the family off the power company. I can’t afford to go cold turkey and cover my roof with solar panels and I don’t think the HOA would allow me to even if I could. Is anyone using solar on a small scale?

Solar panel technologys are advancing all the time. I could be wrong about this as it has been at least 6 months since I checked, but last time I checked, solar panels as we know them, the kind you put on your roof cant generate enough power to run a full household especially if you have kids, with various game consoles, TV’s, lighting, cooking, fridges and so on, not to mention power tools like the electric lawn mower or sander! That is to say, they cant generate enough power unless you are willing to spend considerable monies on the bestest most up to date ones and you have plenty of roof and garden space to mount them on. Actually, it would be cheaper just to pay the bills over the next 30 or 40 years at present prices than to do something like that.

However, other ideas are more reasonable, I have seen people mount rectulanguler plastic tanks on their roof, paint the outside of them a matt black, and put a transparent layer over them. This heats the water inside, saving them on heating costs for bathing and for heating the home in the evening. the most expensive part of this is getting it mounted and the pump to pump the water around the house.

Another alternative, is the geo thermal approach. That is the idea where you replace your radiators and heating system all together with a set of coiled pipes going through out your house. These pipes then lead out to the back garden under the ground about 3 or 4 feet. The idea being that the ground at that dept is always of a constant temperture no matter the weather, so if the house gets too hot the pipes (which are filled with a water/antifreese solution and are not connected to the water system) transfer heat out of the house and under the ground outside, but if the house gets too cold, the pipes take the heat from under the ground outside, and bring it into the house. This however will make any heating or air conditioning system almost useless as your house will always stay at the same temperature. Again you need a pump to pump the solution in the pipes it round the house.

how many have solar powered lights at home,and think that people….?

Wednesday, September 30th, 2009

how many people have solar powered lights at home.indoor use ones. with panels hardwired or not. ?
how many people here think we should invest more in that for ourselves,and do away with electricity bills?
just wondering if people actually considered the idea or actually went and did it,and saved a ton of money and that now they do not have to worry about a missed bill,and they have thier own back up emergency lighting..makes sense?
ok, i am even talking just saving Some money on electricity to cut costs as well.
1 room with it..or the whole house.
and i havent thought of back up heat,but they do have some pretty neat solar appliances as well..with no need to plug in..its amazing what we have at hand,to help,..and many dont take advantage of the free power. if no sun- they have battery storage,for that.depends what you buy.

I have several solar powered lights at home (outdoor ones) but I don’t have any indoor ones. I think it’s a great idea though. Any little thing that helps to save environment will pay off in the long run.

What would I need to run a laptop on indoor lighting (ie no batteries)?

Monday, September 28th, 2009

Does such thing exist? There are many watches and calculators that can run on indoor lighting and there are some heavier duty solar panels that could theoretically provide power to a laptop or computer if hooked up right. But can those same solar panels run on indoor (office/mall) lighting to power a laptop?

Grossly impractical. Laptops consume around 45-60 watts of electricity. Watches and pocket calculators consume a very minuscule amount (milliwatts?). There’s a reason why it works for those devices.

Even if you replaced carpet and walls with solar panels and turned on all the lights in the building, it would not adequately power one laptop.

Solar panels work best in direct sunlight (i.e. outdoors). Panels run in the thousands of dollars. Even a panel just to power a laptop will run $500.

If you ran you laptop nonstop 24/7 with the screen on for a whole year, it’ll only cost about $50 to the power company. 10 years break even if you try a solar approach. Still worth it for you?

what kind of solar light would I look for?

Saturday, September 26th, 2009

I have a chicken house. I need a 100 watt lamp indoor for light and I would very much like it to have a battery to store power. And as long as I am putting down my wish list, I would also like to have an outlet to plug another light or something else into. Any thoughts?

Maybe you can explain it better…do you mean that you want to run a 100 watt bulb and some other things powered by solar energy? And are you asking how you would go about accomplishing this?

Will a frensel lens generate heat if placed in front of direct indoor lighting?

Thursday, September 24th, 2009

If not, what is the difference between solar light, and say the light from a 100 W lightbulb, that causes the fresnel lens to generate heat when placed in the sun?

Well, a Fresnel lens concentrates light, but it’s not quite as drastic as say, a magnifying glass.

You have to remember, your eyes are incredible instruments, that coupled with your brain, kinda ‘even out" what are in reality, hugely different amounts of light.

My point is, the sunlight is MUCH more intense than artificial lighting.
Have a light on in your house during the day, with the blinds closed. When you open the blinds all the way, the sun is so bright compared to the lamp, that the lamp is irrelevant.
You only notice it, because it’s a different color temperature.

100 watts is not much at all. (I’m a filmmaker and photographer).
When they do nighttime exterior filming, it’s not unusual for them to use 50,000 – 100,000 worth of lights.
There is actually such a thing as an 80,000 watt light!!
That’s one bulb!
The point being, this is what it takes to light a particular area, not even to the same brightness that the sun does.

So, the short answer is; your 100 watt light is just super wimpy.
That’s why it doesn’t really generate any heat shining through the fresnel lens.