Water Cooled Solar Cell Questions
Water Cooled Solar Cell Questions
(OP)
I am looking for the temperature of the effluent water after it cools the solar cells. Anyone have an equation or experience with this? Also, how much does maintenance on one of these systems cost. I have seen many on roof tops out here in California but a lot of them have the frosted over glazing and corroded lines what is the real life span of these systems. I asked these questions to a sales rep for an installer and I got unrealistic answers.





RE: Water Cooled Solar Cell Questions
That depends on what the design requirements are and the operating conditions; it's at least higher that the input.
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RE: Water Cooled Solar Cell Questions
RE: Water Cooled Solar Cell Questions
Here you have a dry system with decades of life expectancy and now you add a water systems that cannot possibly have the same life expectancy, costs more money to purchase, money to maintain, money to run, and brings corrosion to the electrical party.
If water made sense everyone would be using it. The government would be recommending it.
Run-a-way. Scream if it helps.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Water Cooled Solar Cell Questions
RE: Water Cooled Solar Cell Questions
TTFN
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Chinese prisoner wins Nobel Peace Prize
RE: Water Cooled Solar Cell Questions
RE: Water Cooled Solar Cell Questions
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: Water Cooled Solar Cell Questions
RE: Water Cooled Solar Cell Questions
TTFN
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Chinese prisoner wins Nobel Peace Prize
RE: Water Cooled Solar Cell Questions
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Water Cooled Solar Cell Questions
Here's the catch. Locations and times that are good for solar energy typically don't need heat in that place and time. When there's a ~kilowatt per square meter falling from the sky, then air conditioning is what's often required. There are exceptions of course, but the economics often become foolish.
More generally, the problem with overly-complicated, overly-expensive renewable energy systems is that the payback period often stretches out to multiple infinities. This is not only bad economics, it's also a sign that it's a waste of resources. Considering that the manufacturing sector is one of the largest sources of CO2, realize that the capital cost of the installation is roughly proportional to the environmental impact of the project. If you're trying to save money, while saving the planet, spending huge gobs of money at the outset is a bad first step.
Calculating the approximate energy captured by water cooling is trivial. You look up the data for the local solar incident (something one needs for any solar project), subtract the energy taken away as electricity (~20%?), guesstimate how much of what remains escapes through other loss mechanisms (assume half, plus or minus half, to start), and then use the well-known thermal mass of water to calculate the approximate temperature rise.
Another approach would be to find data for a comparable sized water heater solar panel. The missing ~20% of the energy for the electrical output is within the error bounds anyway.
RE: Water Cooled Solar Cell Questions
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Water Cooled Solar Cell Questions
ie increase in temperature the out put power drop very little,
about 85% of the sun light energy transfer to heat only 15% transfer to energy. normally the solar cell will be heat up to 50 degree C,
the environment temperature is 30 degree C,
the loss of power due to this temperature different is small.
therefore no need to spend money to cool down the solar by water.
sam wong
RE: Water Cooled Solar Cell Questions
TTFN
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RE: Water Cooled Solar Cell Questions
How's the reliability when all that water freezes solid?
This is like adding a mechanical piston operated oscillator to a microprocessor.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Water Cooled Solar Cell Questions
In many cases, that trade will not compute, but in some systems, it might be worth it, particularly if your cooling system is reasonably robust, and you cannot accept high failure rates on the electronics, which is often the case in military systems.
TTFN
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RE: Water Cooled Solar Cell Questions
large current will damage the shaded cell.
that why there are 3 bypass diod, one diod protect two role of cell.
all the information print in a pc of spec sheet.
read it then come to the point of reliability.
use the army term as shell.
RE: Water Cooled Solar Cell Questions
http://forums.whirlpool.net.au/archive/1609024
RE: Water Cooled Solar Cell Questions