CR4 - The Engineer's Place for News and Discussion ®


Previous in Forum: Overvolting 12v 300 Watt Immersion Element   Next in Forum: keshefoundation.org Free Energy Plasma
Close
Close
Close
17 comments
Guru
Popular Science - Weaponology - New Member Popular Science - Cosmology - New Member

Join Date: Feb 2011
Posts: 6922
Good Answers: 208

44% Efficiency Solar Cells?

05/01/2014 8:46 AM
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".
Guru

Join Date: Mar 2007
Location: at the beach in Florida
Posts: 17942
Good Answers: 1029
#1

Re: 44% efficiency solar cells?

05/01/2014 8:56 AM

....at concentrations exceeding 1,000 suns....

__________________
Life is like riding a bicycle. To keep your balance you must keep moving. A.E.
Register to Reply
Guru
Engineering Fields - Mechanical Engineering -

Join Date: Sep 2009
Posts: 1657
Good Answers: 70
#2
In reply to #1

Re: 44% efficiency solar cells?

05/01/2014 11:31 AM

Interesting, so they use a magnifier to intensify the light and focus it onto a solar cell then capture 44% of the available energy? I wonder if you could use fiber optics and 'sunflowers' to alter the shape and look of solar energy.

I am not up to speed on solar, how much of an improvement is this?

Drew K

__________________
Question: What is going on with the American's Government? Response: Who is John Galt?
Register to Reply
2
Guru

Join Date: Mar 2007
Location: at the beach in Florida
Posts: 17942
Good Answers: 1029
#3
In reply to #2

Re: 44% efficiency solar cells?

05/01/2014 12:22 PM
__________________
Life is like riding a bicycle. To keep your balance you must keep moving. A.E.
Register to Reply Good Answer (Score 2)
Guru

Join Date: Mar 2007
Location: at the beach in Florida
Posts: 17942
Good Answers: 1029
#4
In reply to #3

Re: 44% efficiency solar cells?

05/01/2014 12:34 PM
__________________
Life is like riding a bicycle. To keep your balance you must keep moving. A.E.
Register to Reply
Associate

Join Date: Apr 2014
Posts: 43
Good Answers: 1
#10
In reply to #4

Re: 44% efficiency solar cells?

05/02/2014 1:06 AM

A total waste of money!

Register to Reply
Associate

Join Date: Apr 2014
Posts: 43
Good Answers: 1
#9
In reply to #2

Re: 44% efficiency solar cells?

05/02/2014 1:05 AM

Concentrating light means cooling is required normally. A big deal

Boeing has long made a 43% efficient cell - for NASA as no one else can afford it.

From the lab to the field for the consumer is a long way!

The average efficiency for a silicone cell today is in the 15 to 20% range.

Register to Reply
Guru
Engineering Fields - Retired Engineers / Mentors - New Member

Join Date: Dec 2006
Location: Brecksville, OH
Posts: 1556
Good Answers: 18
#5

Re: 44% Efficiency Solar Cells?

05/01/2014 4:10 PM

What is the maximum available Solar Energy Intensity at ground level. That defines the maximum energy EVER recoverable. The numbers are (I believe) on the Internet and quite low making installations of excessive size necessary for cheap power. Of course, solar is practical for small energy consumption devices.

__________________
"Consensus Science got us into this mess, then why can't it get us out?" : Rephrase of Will Rogers Comment
Register to Reply
Guru

Join Date: Mar 2007
Location: at the beach in Florida
Posts: 17942
Good Answers: 1029
#6
In reply to #5

Re: 44% Efficiency Solar Cells?

05/01/2014 4:47 PM

Average over the entire earth = 164 Watts per square meter over a 24 hour day...or direct sunlight at the earth's surface when the sun is at zenith is about 1050 W/m2, but the total amount (direct and indirect from the atmosphere) hitting the ground is around 1120 W/m2.[3] In terms of energy, sunlight at the earth's surface is around 52 or 55 percent infrared (above 700 nm), 43 or 42 percent visible (400 to 700 nm), and 5 or 3 percent ultraviolet (below 400 nm).[4] [5] ....

http://en.wikipedia.org/wiki/Sunlight

__________________
Life is like riding a bicycle. To keep your balance you must keep moving. A.E.
Register to Reply
Associate

Join Date: Apr 2014
Posts: 43
Good Answers: 1
#8
In reply to #5

Re: 44% Efficiency Solar Cells?

05/02/2014 12:57 AM

Between 800 and 1000 watts per m2

Register to Reply
Guru
Popular Science - Weaponology - New Member

Join Date: Jan 2013
Posts: 613
Good Answers: 15
#7

Re: 44% Efficiency Solar Cells?

05/01/2014 10:45 PM

Pay the money, do the R&D and be open minded as to the materials and the required locations, and higher efficiencies are possible.

In my neck of the earth, there are big open spaces (32 degrees south lat). At the end of the day, there is a balance between initial install cost, PV life, purpose and place. My initial PV had a nominal 11% efficiency and cost $9 a watt in 1988 dollars. (See solar train entering a tunnel in the south island of New Zealand - part of a 40,000km world marathon run not yet finished! But it worked .. running at 60 volts with lead acid battery backup).

My latest PV costs around 50 cents / watt. I guess the efficiency is around 15%. Fortunately I have space to collect that 1000 watts/sqm ... but admittedly, not very efficiently.

__________________
DY
Register to Reply
Guru

Join Date: Jun 2010
Location: srilanka
Posts: 2728
Good Answers: 5
#11

Re: 44% Efficiency Solar Cells?

05/02/2014 1:46 AM

What will be the efficiency of PV panel in the form of a sphere on which direct as well as indirect sunlight from any direction can fall?.

__________________
pnaban
Register to Reply
Associate

Join Date: Apr 2014
Posts: 43
Good Answers: 1
#12
In reply to #11

Re: 44% Efficiency Solar Cells?

05/02/2014 2:32 AM

Lousy - only a small percentage would be aimed at the sun at any time.

Register to Reply
Guru

Join Date: Jun 2010
Location: srilanka
Posts: 2728
Good Answers: 5
#13
In reply to #12

Re: 44% Efficiency Solar Cells?

05/02/2014 2:57 AM

Light reflected in polished surfaces facing other directions of the globe will add to the output.

__________________
pnaban
Register to Reply
Associate

Join Date: Apr 2014
Posts: 43
Good Answers: 1
#15
In reply to #13

Re: 44% Efficiency Solar Cells?

05/02/2014 3:31 AM

How much? It is nothing in relation to a properly aimed cell and the cost goes way up.

Solyndra was going down that road.

Register to Reply
Guru

Join Date: Apr 2014
Posts: 1876
Good Answers: 67
#17
In reply to #11

Re: 44% Efficiency Solar Cells?

05/02/2014 4:56 AM

Pretty good if it's a Dyson Sphere.

Register to Reply
Guru
Popular Science - Weaponology - New Member Safety - ESD - New Member Hobbies - Fishing - New Member

Join Date: Sep 2006
Location: Near Frankfurt am Main, Germany. 50.390866N, 8.884827E
Posts: 17908
Good Answers: 196
#14

Re: 44% Efficiency Solar Cells?

05/02/2014 3:29 AM

Being a positive type of Guy and simply assuming that this report has a lot of truth in it for the moment, I can only applaud and hope that they will be available soon....perhaps with water cooling to up the efficiency even further and to increase the usable life span.....

Such a development is sorely needed......hopefully the price will be right.....

__________________
"What others say about you reveals more about them, than it does you." Anon.
Register to Reply
Associate

Join Date: Apr 2014
Posts: 43
Good Answers: 1
#16
In reply to #14

Re: 44% Efficiency Solar Cells?

05/02/2014 3:38 AM

A boss from years back used to make the comment, "Wish in one hand and do #2 in the other - come back and tell us which fills up first".

There have been no real economical advances in solar PV efficiency for years - none on the horizon either. Reports like this one are from people trolling university research dept web sites.

Register to Reply
Register to Reply 17 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".
Copy to Clipboard

Users who posted comments:

agua_doc (1); Andy Germany (1); Don from Oz (1); Drew K (1); europium mkII (1); pnaban (2); russ1 (6); SolarEagle (4)

Previous in Forum: Overvolting 12v 300 Watt Immersion Element   Next in Forum: keshefoundation.org Free Energy Plasma

Advertisement