Solar Panels

Hello Guest,

A) Location if given is helpful for you:

You have not given your location - You can do this, by first registering, or do it in your reply post.

Once you have Registered, scroll down top lower right-hand corner of page, and click on "My Profile", enter your location, and the location auto-updates into every Post you make.

The reason for Location is simple: At present no reader knows where you are - you could be in Iceland, outer Mongolia, Easter Island, or some other remote place.

Your Location often determines who assists, if they are close to your location, they may know supplier of information required so much easier.

In your case, you are asking the impossible.

B) Insufficient Information Given:

You surely know the Actual details: Make/Brand,type of panel, angle of inclination, pointing in which direction, latitude and longitude, sunshine hours per year, climatic conditions, and so much more.

You have given no information except a physical size, and somehow you expect magical results.

We are not mind-readers, and have no way of assisting, unless the information is supplied.

Therefore, if you reply, with sufficient information, it may be possible to assist you.

Please reply here, at this Topic, thank you.

Kind Regards....

pending on where you live, solar energy gives 4 to 5 kw per m2.

so if you ad electro-solar panels too, then you will get ligthed the hotel by free.

and you will help to reduce global warming

congratulations

According to this: http://en.wikipedia.org/wiki/Solar_constant#Solar_constant, the figure should lie between 1300W/m² and 1400W/m². I would look askance at someone who claimed it was more.

Then look askance, he claimed more!! Wrongly of course!!

I found the following at Yahoo answers:-

Sun Power Per Square Meter

Q.Is there a limitation of power received per square meter of solar cell? If there is, how many kWh?

A.There are two limits. The sun only puts out so much energy per square meter. So if you depend on the sun shining on the solar collector directly (that implies without resorting to vast areas of mirrors or focusing arrangements), there the limit called the solar constant. It is measured by satellite to be roughly 1.366 Kwatts per square meter. It reduces when received through the atmosphere.

Good post Tom, direct and to the point. I have rated it so as well.

What Tom did not mention is that converting heat into electricity is a costly and lossy job.

Using your heat source correctly as he mentioned, will probably allow you to reduce overall costs to a reasonable level, without converting at all.....

Wind is the preferred method of producing electricity, but can also bring extra noise, which your guests will not find attractive.

Solar cells to electricity is still in its infancy and uneconomical for most people!!! It also needs a large collection area and that costs a bundle.....

A solar mirror can heat a coil of water-filled tubing into steam. The steam can power a steam engine to run a generator and make electricity. The used steam needs to be cooled in a condenser. By using a water bath condenser you would get hot water for other uses.

just provide me with ur location and i will provide you with a brand new idea (if yopur in dubai we can meet for further discussions)

1. No conversion of heat to electricity unless you can get 1000oC.

2. Heating the swimming poo reduces electrical costs significantly

3. Swimming pool provide heat storage which can then be used for heating air

4. Solar Panels/Photovoltaics will not work in Dubai, and especially in the other Emirates because of their rates...heavily subsidized STILL. I did a study for 129 bldgs and 1000sqm/bldg and without DEWA buying back - not worth it for storage. I usually recommended anyone else to move to the other Emirates or Oman and get FEWA or ADEWA electricity for less than half DEWA rates.

5. If you are a long way - 10Km and have to pave for the cable and substation, maybe you can afford.

6. Careful with Dubai Ideas many are talked but few have the economics.

TOM

You can pipe light into ballrooms and lobbies by several means....collect it anywhere, not just on the roof, and feed it though fiberoptic cables to bathrooms, kitchenettes, computer rooms, play rooms, indoor spas and pools. Fiberoptic may be a little too high tech...really good results can be had by literal "pipes", mirrored on the inside, and only a half meter or so in diameter which bring the outside to the inside. The illumiation is normally steadied by LED lighting which will supplement the natural lighting according to a sensor. Where the savings comes in that people won't bother to snap on a light when they can see perfectly well in the natural light.

Large fish tanks (VERY LARGE) placed in the sun were suggested once to help soak up hot daylight rays, and then release the gathered heat gently at night. Not quite sure if it would save much in hvac, but the naturalness of it appeals to me. Could store lobsters in there...grin!

Use of solar energy 'profitably' always seems to be an issue.

Where do you NEED heat? Using a Trombe wall will let you 'average' the temperatures large volume spaces. In 'hot' areas of the world, insulate/cover the wall during the day, and let it 'radiate' to the outside at night.

Put in parabolic collectors, and generate 'high quality' heat to generate cooling in an 'amonia absorbtion cycle' cooler. They tend to be heavy units, and the anhydrous amonia can be VERY toxic if not handled properly (spelled KILL PEOPLE). But it has been used for well over 100 years around the world in places with large cooling needs (ice houses, theaters, etc). Many commercial units are available world wide, but typically not using solar. (I am guessing most want it to run 7x24 and not 8 to 12hrs/day on the average)

High quality heat or steam is useful in chemical processes. Use direct heat for space heating. Thermal syphons are great to use to keep swimming pools warm if you can place the collectors below the level of the pool.

Use heat to 'dry wood'. Kiln drying wood is energy intensive. Solar panel provided heat is a good way to help dry wood. People all over the world use fires of scrap wood product so kiln dry wood, and those could be used for other purposes (MDF or chip board, paper, etc) if the wood was dried using solar.

Where I live they grow tobacco. In the fall the 'tobacco barns' light up and there is tobacco laced smoke that covers the country side. I wish some of these barns would move to solar instead of wood. But wood is the 'traditional' thing to do to dry the tobacco leaves before going to market.

For your hotel, if it is going to be remodeled, put in an under the floor 'heat' systeem, that uses hot water. Having a floor nicely heated when getting out of a bath, or plumb in 'towel heaters' into each room. Those are a couple of luxury things.

The 'light pipes' a different postere mentioned are great. The ones I have seen have a clear/translucent dome on the roof, and an internally highly polished 'stove pipe' of large diameter (250cm/10" or up) with a difuser on the bottom to help disperse the light at the recieving location. Need to make sure you don't get condensation or dust on the inside of the pipe or its optical efficiency would be reduced. You could use heliostats to increas the amount of light available for this purpose.

Yet another posting mentinoed fiber 'light pipes'. They to work well. Optically clear glass can allow he light to be 'piped' a long way, plastic absorbes much, but does work. The good thing is you could concentrate the light on the end of a LARGE bundle above and pipe it to wherever you need light. I think the economics might get in your way, optically clear fibers can get pricey. But it is worth looking into.

If it is cool in your area, keep any parking garage heated, so patrons won't need to get into a 'cold' car in the winter (or use amonia cycle chillers to keep it cool!)

Lots of luck and let us know what you do!