Your Questions About Solar Powered Fan

Linda asks…

Im building a two story building in Ghana, West Africa.. It needs to be solar powered.?

Each floor is about 1500 sq ft. We are needing the power for lighting. (not much, just enough to see ok.) Two electrical ovens, a few small fans and other small appliances for laptops and such.. Id like to know what kind of solar panel i should use and the costs of it.. It is for a non-profit org im trying to get up and running called Impact Project Ghana. Were hoping a green company will help by donating them but if not we will have to purchase them ourselves.. Thank ya much!!

ssadmin answers:

Most modern systems are grid tied and therefore can effectively use the grid as a 100% efficient battery and peak power usage isn't an issue. However, it's probably likely that you're talking about a gridless solution which would require batteries and all the lights and appliances should be 12V light and appliances in order to avoid the loss of energy through an inverter, an inverter can be as bad as 60% efficient. Lead Acid batteries which are the least expensive are about 50% efficient at charging. Solar panels typically produce 17 VDC even though they are rated as 12V panels, such a voltage can damage the batteries so a charge controller is needed to regulate the charging. If you can convert anything to something other than solar than you should do so. There are kerosene refrigerators which is usually the most important item for medications and food. It is possible to run such refrigerators on solar power but you would need to use oil as the transfer fluid because 450 Fahrenheit is needed for the refrigeration cycle. You would probably also need a molten salt thermal storage unit for such high temperatures though an insulated tank might work.

Good luck.

Helen asks…

hey i need a cool experiment quick, any suggestions?.?

hey can everyone plz help me find a thing to do for my science experiment plz i need a cool, easy and fun one cause last year i done a solar powered fan and no-one showed up at my table 🙁 lol i was so sad :/ plaz help me find one cause its due tommoroow i searched on the web for like 2 hours but none seemed to work for me help!

ssadmin answers:

Try the web page below for heeps of ideas

Michael asks…

Where can I buy a low voltage solar panel?

For a project at school we have to devise a experiment using solar power. I'm going to connect a solar panel (aorund 3volts) to the motor of one of those cheap plastic hand-held fans. Does anyone know where I can buy a solar panel near Parramatta or Bondi?

ssadmin answers:

Simpe any marine store carries trickle charge solar panel,,,,,,,,,works on ervrthing.

Donna asks…

What do you think? The too-good-to-be-true products which promise something like taking off…?

…ten years from your face
and one product which I bought into claiming to keep your car's interior cool using a small fan which is solarpowered and left clipped to your car's window. It was a piece of junk. Even so, do you think the people who come up with these crazy gadgets make enough money on them that it doesn't matter if they eventually have to pull the “invention” off the market?

ssadmin answers:

I fell for the car fan also…..Seems you had to NOT use it if there was going to be rain that day!! How dumb!!!..I sent it back with a very large note stating that they should stop carrying this product, that it should be taken off the market….etc…….at least I felt good writing and sending it in!! LOL

These so called ‘inventors' may make some money, but not much if the firms sellling their junk have to keep making refunds!!!!!!! So maybe it's a '50/50′ type of thing………

As for taking ten years off your face, which product are you referring to? I am a retired makeup artist and really get a kick out of how women, and men, too, abuse their skin for years with too much sun, alcohol, etc., then expect a quick fix; well, ‘there ain't none!!!”……..but I”d like to know which one it is, and if you bought it?????? Thanks!!!

Charles asks…

I took out a solar power strip from my calculator, how do i use it for a mini fan?

I took out a solar power strip from my calculator, how do i use it for a mini fan? its just the strip alone, do i just stick wire onto it and plug it to my HOMEMADE fan?

ssadmin answers:

The solar strip should have two wires. But it is really small and only designed to generate the power needed by a calculator (which is almost nothing.)

So, your home made fan should be a very small and low voltage DC permanent magnet motor. But I think you will find that it is undersized to drive even a small motor, much less with a fan load.

You can characterize the solar cell by connecting a volt meter across the cell and reading the open circuit voltage. Then measure the current using the same connections to the solar cell. This will provide open circuit voltage and short circuit current.

Now, your motor has to be rated for the same voltage and require less current than the cell can provide.

Good luck.

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