Help: Solar Powered Fan

[TomP]

You just need to search for solar 16" dc fan.

Years ago there would be a simple answer to your question, as the supply was very limited. I did a cursory search and was amazed at the options. Yes you are going to have to roll the dice and just try something, as it is hard to understand your needs, system, and what you want to spend. You can get a 12" to 16" fan for 15$ to 379$ and CFMs and APM draw, and noise varies as well.

Now a lot of off gridders seem to have AC these days, or live in cooler areas. I am deep south no AC bodacious shade and solar array 200 feet from house for same reason. Fans i am familiar with. You can use 4" to 6" muffin fans for special situations. The 10/12" computer fans are excellent, cost effective, and a good AMP to CFM ratio.

Now you get into reliability. I have a fan similar to the one in the link, it is mounted in a screened box and sits in a window, 25 years ago this was one of the few options. High quality DC motor, lubricate it regularly and it Will last for decades.

In my search I now see the 12 V. car radiator fans, if I were in need,, I might try these, but you have no idea how much noise they make. Muffins noise, to me can be irritating, 12" computer fan is almost silent but have not stood up well, my old 16" fan is reasonably quite.

Now if you really really want to move air, find an efficient tiny inverter, and get a 9 blade DC ceiling fan that has a built converter. Yes I know this seems unpractical, DC to AC back to DC, but this fan moves 9000 CFMs at about 30 watts. http://www.solarpaneltalk.com/showth...YI-Ceiling-Fan This is best purchase I have made since my Crystal Cold Refrigerator.

http://www.backwoodssolar.com/catalog/fans.htm

[russ]

Best of wishes and luck to you and your wife Sunking!

[inetdog]

OK then I assume you only classify radiation as Alpha and Beta which I think are particulate matter aka ionizing radiation (Radioactive Material). As opposed to non ionizing radiation like Gamma, X-Ray, Light, and Microwave which are electromagnetic? Where does that leave Cosmic that pilots and astronauts are exposed too.

Been going through another crash course on radiation the last two months as my wife has been going through radiation treatments after breast cancer. Spending some time with her Radiologist talking shop. Strange discussing shop with two doctors talking to an idiot engineer.

There definitely is a difference between different forms of what we lump together as radiation. Particle radiation (particles with rest mass anyway ) and EM radiation from x-rays down through visible light to microwaves to LF radio. EM Radiation can be ionizing or non-ionizing. Particle radiation can be ionizing or non-ionizing too, (non-directly-ionizing for neutral particles, although a capture event has plenty of energy to create ions!)

To get into the nucleus of an atom you need to have really high energies and also hit the target head on. (The classic experiments that led to the understanding that there was a small concentration of matter and charge inside a cloud of electrons looked at backscattered x-rays and back-scattered particle beams.)

I do not call it nuclear radiation (either particle or photon) unless it involves the nucleus. The photon energies involved in PV are nowhere near that energy range.

Cosmic radiation's primary characteristic is high energy, but it can consist of either particle or EM radiation. Some types of cosmic radiation cause effects primarily by the secondary radiation they produce while slowing down in the atmosphere, the astronaut, or his surroundings.

I wish you and you wife the best, and fortunately radiation treatment seems to work equally well whether the patient or the family understand how it works. But IMHO it is more reassuring to know why the oncologist makes the treatment decisions he or she does.

[Sunking]

OK then I assume you only classify radiation as Alpha and Beta which I think are particulate matter aka ionizing radiation (Radioactive Material). As opposed to non ionizing radiation like Gamma, X-Ray, Light, and Microwave which are electromagnetic? Where does that leave Cosmic that pilots and astronauts are exposed too.

Been going through another crash course on radiation the last two months as my wife has been going through radiation treatments after breast cancer. Spending some time with her Radiologist talking shop. Strange discussing shop with two doctors talking to an idiot engineer.

[inetdog]

You do not have to bust a atom apart to move energy around or release it. It does no thave to be an unstable atom to release or transfer energy from one state to another.

X-rays are nuclear energy is it not? X-rays are man made with nothing more then a high voltage voltage ionizing an inert material, focus the bean at flesh and bones and that in turns knock off photons to strike a film or receiver device for you to see.

No, not nuclear energy. Elementary particle, sure, and quantum, but if you are just involving the electrons (as X-ray tubes do) then it is not nuclear.

(Used to be a high energy physicist, so I feel strongly about that stuff.)

[Sunking]

I sure hope not! There is a world of difference between the energy required to move some loose electrons around and the energy required to get into the nucleus of an atom.

You do not have to bust a atom apart to move energy around or release it. It does no thave to be an unstable atom to release or transfer energy from one state to another.

X-rays are nuclear energy is it not? X-rays are man made with nothing more then a high voltage voltage ionizing an inert material, focus the bean at flesh and bones and that in turns knock off photons to strike a film or receiver device for you to see.

[inetdog]

Solar PV cells are basically a closed loop nuclear reactor.

I sure hope not! There is a world of difference between the energy required to move some loose electrons around and the energy required to get into the nucleus of an atom.
Now in terms of incoming radiation (of any sort) knocking things around, yes there is a similarity. But the analogy of droplets of water activating a jet pump would be almost as good in that respect.

[OffGridMikey]

Exactly my thoughts

Sunking,

My thoughts exactly, wtf

[Sunking]

Solar Panels Observe photons from sunlight and generate energy in form of electricity for the home or any official building through the photovoltaic effect theory.

Complete rubbish you moron. Observe definition:

1. To conform one's action or practice to (as a law, rite, or condition) : comply with.

2. To inspect or take note of as an augury, omen, or presage .

3. To celebrate or solemnize (as a ceremony or festival) in a customary or accepted way.

4. To watch carefully especially with attention to details or behavior for the purpose of arriving at a judgment,

5. To make a scientific observation on or of

6. To come to realize or know especially through consideration of noted facts.

7. To utter as a remark

Solar PV cells are basically a closed loop nuclear reactor. When a photon of sufficient energy strikes the PV cell, it is absorbed and its energy "knocks" a loose electron from one of the silicon atoms, allowing it to flow freely. The internal construction of the PV cell is like a diode, in that there is a layer of "p" type silicon (that has a deficiency of electrons), sandwiched against a layer of "n" type material (that has an excess of electrons). Because of this construction, when an electron is knocked loose from the "n" type layer, it tends to flow in only one direction out the wire attached to this layer, then through an external circuit to do useful work, and back again into a wire connected to the "p" layer. In other words it is a closed loop nuclear reaction.

Observe that Moron.

[Alex75]

Help: Solar Powered Fan

Solar Panels Observe photons from sunlight and generate energy in form of electricity for the home or any official building through the photovoltaic effect theory.

Mod note no links

[OffGridMikey]

Check these out.

I need to run 2 Decent Fans completely of Solar Panels.

Also is it possible to run this without Inverter? Can I hook the motor up directly? If yes How?

Also I know that when there's no SUN there would not be any Ventilation, but that's the idea.

What kind of Panel would I need?

What kind of a Fan?

I want it to make a good breeze and not consume that much power.

I'm trying to save as much money as possible on this project...

Thank u!

http://www.12volt-travel.com/12-volt-fans-heaters-c-94.html

I use the 0.5amp units as they consume almost no power and have two speeds. I power these from a charge controller so I'm not sure how it would handle the higher voltage of the PV's but for $20 it maybe worth it to try.

[SunEagle]

UP I still need help can somebody provide me information how I can do this, so far I didn't get reasonable information

You can find a lot of different types of solar fans using google. Try "solar attic fans" and then look for the ones that the fan and pv panel are separate. That way you can mount the panel outside and install the fan inside.

I saw one on Amazon made by Rand Solar that was rated 27 watt and 1720 cfm and included a thermostat for about $250 including shipping. Keep looking and you will find others for close to $100 but I do not know how much air they will move.

[martybg]

UP I still need help can somebody provide me information how I can do this, so far I didn't get reasonable information

[russ]

Can somebody provide me with ebay links of what should I buy and no I'm not lazy I just wanna make sure i get what I have to

You attempt it first and post your results - then maybe someone will comment yes or no.

[martybg]

Can somebody provide me with ebay links of what should I buy and no I'm not lazy I just wanna make sure i get what I have to