rhino wrote on Dec 28^th, 2020 at 3:07pm:


So we have these solar cells that can reach 42% but the panels are somewhat less. Seems to be a lot of lost energy somewhere.

Bobby. wrote on Dec 28^th, 2020 at 4:10pm:


Doesn't that attract a forum wide ban?

Baronvonrort wrote on Dec 28^th, 2020 at 3:18pm:
You still arent getting it, further reading required for you.

rhino wrote on Dec 28^th, 2020 at 4:36pm:



It's you pots petal. They say the PV value is ~205 but cell value is up to 42%. So you can either explain the loss (interconnections, variability because of multiple junctions etc) or waffle. Or ignore it.

Merely parroting something, of which you have no understanding, just doesn't cut it.

"The fundamental (detailed balance) limit of the performance of a tandem structure is presented. The model takes into account the fact that a particular cell is not only illuminated by part of the solar irradiance but also by the electroluminescence of other cells of the set. Whereas under 1 sun irradiance a single solar cell only converts 30% of the solar energy, a tandem structure of two cells can convert 42%, a tandem structure of three cells can convert 49%, etc. Under the highest possible light concentration, these efficiencies are 40% (one cell), 55% (two cells), 63% (three cells), etc."

Detailed balance limit of the efficiency of tandem solar cells

https://ui.adsabs.harvard.edu/abs/1980JPhD...13..839D/abstract

"Where Does The 67% Of Energy Loss Go?

    47% of the solar energy gets converted to heat.
    18% of the photons pass through the solar cell.
    02% of energy is lost from local recombination of newly created holes and electrons.
    33% of the sun's energy is theoretically converted to electricity.
    100% total sun's energy."

"The record for a multi-junction cell is held by the University Of New South Wales (UNSW) in Sydney, Australia at 43% using a five cell tandem approach. However, the UNSW tandem cell is very expensive. In addition to the cost issue, there are other constraints that make the tandem cells complex. For example, all the layers must be lattice compatible with one another in their crystalline structure and the currents from each individual cell must match the other cells. Multi-junction cells are commercially used in only special applications because their expense currently outweighs any efficiency improvement. "

http://www.solarcellcentral.com/limits_page.html

lee wrote on Dec 28^th, 2020 at 4:02pm:


Well....ya see, Lee.  It goes like this.  What you are whingeing about Monk having done to you is exactly (sort of) what Bobby has done to Monk who inadvertently breached his ban here.  Bobby goads him some more, Monk responds, and is now banned Forum wide because Bobby went off squealling to FD/GMods.

How about you show some consistency, hey?  How about you get up Bobby for actually seeking (and getting) a Forum ban on Monk, as opposed to your situation, where Monk merely gave you a heads up, and did not seek to have you banned Forum wide?

Way past time the cultist mentality here broke down.

Aussie wrote on Dec 28^th, 2020 at 6:20pm:



Perhaps you could show this alleged whinging petal.

Aussie wrote on Dec 28^th, 2020 at 6:44pm:



Wait a minute -
apologise for lying

Reply #24 - Today at 7:27pm

lee wrote on Dec 28^th, 2020 at 6:48pm:


No...you were having a cry, you big girl's blouse and Monk has not done what he could have.  Yet here you are, in the place where a Mod of a crap MRB HAS done what you thought Monk had done to you, and you bleated to us.

Jayzuz.