Navitron Renewable Energy and Sustainability Forum

Announcements & News => Media Watch => Topic started by: stannn on March 30, 2020, 04:44:47 PM



Title: Vertical PV.
Post by: stannn on March 30, 2020, 04:44:47 PM
I’ve not seen this before.
https://www.pv-magazine.com/2020/03/30/french-german-alliance-for-vertical-pv/


Title: Re: Vertical PV.
Post by: Barrie on March 30, 2020, 05:00:23 PM
Shouldn't they be fitting mirrors to the backs of the ones opposite  :hysteria

Sorry, very old forum joke......


Title: Re: Vertical PV.
Post by: djs63 on March 30, 2020, 05:36:20 PM
The article mentions “lots of space for cattle” but they would demolish everything whilst having a good scratch...


Title: Re: Vertical PV.
Post by: billi on March 30, 2020, 07:11:13 PM
good joke , Barrie , made me smile  :)

Anyway , when it comes to PV and land-use , i prefer the higher mounting idea , and grow things underneath , reduce tractor size (if a tractor is needed ) , and sure cattle are ambitious , to farm between PV

But  , i still think we do not need to cover farmland with PV , but if its done , it should be in a way, that the farmer ,  needs attraction to grow food and electricity

https://www.pv-magazine.com/press-releases/agrivoltaics2020-conference/


Title: Re: Vertical PV.
Post by: RIT on March 30, 2020, 09:40:58 PM
I guess it resolves the current issue seen where all the current deployed PV output peaks at the same time of day due to its south-facing deployment. So far the only PV time of day fee structure I have seen is the Octopus one aimed at consumers, but I would guess that commercial operators would also pay a premium for the generation that is outside of the 'standard' PV curve, especially if they are powering a 24-hour process such as H2 production.


Title: Re: Vertical PV.
Post by: oliver90owner on March 31, 2020, 12:49:21 AM
Perhaps the french still refer to bovine, ovine, wife, children and anything else they might own, as cattle?


Title: Re: Vertical PV.
Post by: billi on March 31, 2020, 03:04:45 AM
that was .... spot on.... political correct, Oliver ....  ;D whistle


Title: Re: Vertical PV.
Post by: M on March 31, 2020, 07:20:40 AM
Quick check and it seems vertical PV generates approx 70% of 'ideal pitch', so this idea seems pretty interesting as it might be simpler than overhead PV. No idea which is better, but having multiple solutions can't be a bad thing, and generating leccy at farms seems like a good way to earn extra income, and hopefully encourage BEV tractors etc..


Title: Re: Vertical PV.
Post by: HalcyonRichard on March 31, 2020, 07:55:21 AM
Quick check and it seems vertical PV generates approx 70% of 'ideal pitch', so this idea seems pretty interesting as it might be simpler than overhead PV. No idea which is better, but having multiple solutions can't be a bad thing, and generating leccy at farms seems like a good way to earn extra income, and hopefully encourage BEV tractors etc..

Does that 70% take into account that the panels generate when irradiated from the front or back ? i.e. can be orientated to maximise dawn/dusk production. And may have a flatter longer peak for production.


Title: Re: Vertical PV.
Post by: Nickel2 on March 31, 2020, 08:45:08 AM
We have heard of see-through window PV film that lets enough light through to work by etc. If the back-to-back panels were a clear glass sandwich rather than black plastic backed, would enough solar energy penetrate to generate power from illuminating both sides of each panel?
From the wavelength to output graphs it can be seen that the bandwidth is quite broad across the visible light spectrum, tapering steeply at the blue end, less so towards the red end.
If panels were made that were sensitive to full-on sun one side, and residual sun the other, they would become more efficient. A suitable gap between panels would be needed for convective cooling.


Title: Re: Vertical PV.
Post by: bxman on March 31, 2020, 10:48:17 AM
I think the point is that they are" bifacial n-PERT solar cells" and absorb photons from both sides at the same time .
with the vertical mounting they are intended  for generation at both ends of the the day and not at mid-day  when conventional panels are generating at their maximum .


Title: Re: Vertical PV.
Post by: M on March 31, 2020, 11:35:35 AM
Quick check and it seems vertical PV generates approx 70% of 'ideal pitch', so this idea seems pretty interesting as it might be simpler than overhead PV. No idea which is better, but having multiple solutions can't be a bad thing, and generating leccy at farms seems like a good way to earn extra income, and hopefully encourage BEV tractors etc..

Does that 70% take into account that the panels generate when irradiated from the front or back ? i.e. can be orientated to maximise dawn/dusk production. And may have a flatter longer peak for production.

Hiya that's just 'normal' PV mounted vertically and south facing, for Germany (the UK) and northern France, so I'd expect bi-facial to do better than that v's normal panels, but I've no idea if the percentage changes with bi-facial v's bi-facial.


Title: Re: Vertical PV.
Post by: Philip R on March 31, 2020, 07:40:58 PM
I thought I saw the late Steve McQueen aka Sgt Hilts, jumping over the fence on a triumph Motorcycle, escaping into Switzerland! (I Know, this is not southern Germany.)

Barrie, most of the forum members present now would not understand the bit about the mirrors. It was no joke at the time, never seen so much vitriol on the subject.

Saying that, The bi-facial panels might work quite well amongst some scatterred aluminium clad reflective buildings.
Philip R.