Go Back   EcoModder Forum > Off-Topic > The Lounge
Register Now
 Register Now
 


Closed Thread  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 09-20-2018, 10:22 PM   #2951 (permalink)
Banned
 
Join Date: Feb 2018
Location: Brazil
Posts: 1,476
Thanks: 14
Thanked 363 Times in 327 Posts
It nearly cools itself, since the mini multi junction are part of the panel and not a tiny spot alone in other farend part like the zenith solar system. So the mini multijunction uses the 200 times larger panel area like a cooler.
And it's 200 suns concentration and not 1000 suns like Zenith Solar's system.

https://inhabitat.com/wp-content/blo...enithsolar.jpg

Zenith system uses water to cool, and so produces hot water for shower. They uses the heated water as part of the efficience calculation, leading to the "fake" claim of 72% efficience. The solar cell efficience it's a bit more than 40%, quite good, since it uses 1000 suns concentration and not just 200 suns.
But 1000 suns would require cooling help.
Welll, solar energy and hot shower source (help save electricity) it could be.

I asked your exact question to a company who created a similar concentrator to insolight panel, Morgan Solar, but that required tracking.



If Insolight could find way to create optical precise to 1000 suns concentration, and for viable prices for such opticals, they could have a chance. Maybe China production costs would be the key.

Quote:
Originally Posted by NeilBlanchard View Post
Does that concentration unit cool the PV cell(s)? Heat is the enemy of efficiency. There is an Israeli company makes this sort of collector - it uses the heat gathered, and cooling the PV keeps as much of the added efficiency as possible.

The thing is though, it all comes down to how much of the sun's energy you can gather - and that comes from the area the sunlight shines on.


Last edited by All Darc; 09-20-2018 at 10:43 PM..
 
The Following User Says Thank You to All Darc For This Useful Post:
aerohead (09-22-2018)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 09-20-2018, 10:41 PM   #2952 (permalink)
Corporate imperialist
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 11,266

Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Snow flake - '11 Nissan Leaf SL
SUV
90 day: 141.63 mpg (US)
Thanks: 273
Thanked 3,569 Times in 2,833 Posts
I will just take the solar panels that create the most W for the least $.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
 
The Following User Says Thank You to oil pan 4 For This Useful Post:
aerohead (09-22-2018)
Old 09-20-2018, 11:32 PM   #2953 (permalink)
Banned
 
Join Date: Feb 2018
Location: Brazil
Posts: 1,476
Thanks: 14
Thanked 363 Times in 327 Posts
Insolight marketing strategy focus on instalation cost, converters, roof stuff to add and fit the panels...
They said (but I found exagerated) that the panels today (average panels) cost only 20% of total cost. But I bet it cost at least 40%.

Smaller panels with more power require less roof work. But what about converters ?

Quote:
Originally Posted by oil pan 4 View Post
I will just take the solar panels that create the most W for the least $.

Last edited by All Darc; 09-21-2018 at 01:03 PM..
 
The Following User Says Thank You to All Darc For This Useful Post:
aerohead (09-22-2018)
Old 09-20-2018, 11:51 PM   #2954 (permalink)
Corporate imperialist
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 11,266

Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Snow flake - '11 Nissan Leaf SL
SUV
90 day: 141.63 mpg (US)
Thanks: 273
Thanked 3,569 Times in 2,833 Posts
Name brand grid tie inverters are cheap, like 10 cents a watt for multi kw units.
My outback sunny boy secure power supply is more like 30 cents a watt, depending on what size I get. Idk having all those solar panels and not being able to use any of the power being made by the solar panels when the power goes out seems dumb.
Mounting costs are totally dependent on your roof.
If you have a semi ideal roof, metal roof pointed south at a decent angle like I have, racking will cost almost nothing.
Single axis mounts add up to 20%, maybe up to 50%, but that's comparing panel mounts to really cheap 50 cent a watt panels.
2 axis mounts could double the cost.

On a terracotta roof, mounting is probably going to be the majority of the cost.

I'm going with huge panels, at least 325 watt. I saw some 470 watt panels I like.

There are so many panels at so many price points, you have "12v panels" which are small and cost around $1 a watt typically, they could use these panels as your example.
Small 100 panels are going to need a crap load of hard ware compared to the same power coming from 470w panels.

But know this, hardware and material costs like mounts, wire, conduit, batteries, fuel for a generator and labor always go up. Electronics, solar panels, charge controllers, inverters have been going down.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.

Last edited by oil pan 4; 09-21-2018 at 12:05 AM..
 
The Following 2 Users Say Thank You to oil pan 4 For This Useful Post:
aerohead (09-22-2018), Xist (09-22-2018)
Old 09-21-2018, 01:49 PM   #2955 (permalink)
Banned
 
Join Date: Feb 2018
Location: Brazil
Posts: 1,476
Thanks: 14
Thanked 363 Times in 327 Posts
Uhhn, almost like I imagined.
These Insolight guys will need to get better and lower cost opticals, and Chinese workmanship, and wait a bit until multi junction get somewhat cheaper (a new manufacturer technic using vapor deposition promisse lower cost in few years) to their concentrator get some sense on market.

Their optical system do not really replace tracking. The panel in a low angle to the sun get a smaller area of sun's cross section, since the sun light get more spreeded in a larger area (of the panel in low angle) than the area of the sun's cross section light. The photons get more spaced over panel's surface area.
The system helps a lot I bet, but not as much as a real tracking system. Do you agree ?

You ecomodder crew should start a school for investors, a science school. Or adviser...

I guess how many people are wise with money but not strong in science, and get fooled but many hoax of start-ups.

Do you remamber about a guy who collect a lot of money to start a company named Soylent ?

He used to say he found a cure to worldwide hungry, using aminoacids and carbohydrated and vitamins in powder, and some minerals, to produce a powder food that require just water, creating a kind of milk with all nutrients body needs.
But the idiot just mixed whey protein (from milk), Maltodextrin (from corn), and synthetic vitamins, and addedsome minerals.
He spoke like these proteins and carbohydrates come just from lab, with no need of farm or cow. And many people believed hin, sent money... In one picture of the webpage he was smilling similar to Steve Jobs look, even hair cut making hin look like Steve in early Apple days, and this got many dumb investors, I bet it got.

Last edited by All Darc; 09-21-2018 at 02:20 PM..
 
The Following User Says Thank You to All Darc For This Useful Post:
aerohead (09-22-2018)
Old 09-21-2018, 02:07 PM   #2956 (permalink)
Banned
 
Join Date: Feb 2018
Location: Brazil
Posts: 1,476
Thanks: 14
Thanked 363 Times in 327 Posts
Fast question: What about sunpower?
On Ebay there are good condition used panels with prices nearly like chinese panels, and Sunpower life span it's much higher (Sunpower said).

https://www.ebay.com/p/10pcs-of-SunP...d=263946836816


If sunpower last 3 times more (much less efficience degradation each year), the price in this sense it's reduced, but this for very long time consideration (a life maybe) and in 60 year something much better would have come out.
But used models in good shape are atractive in prices.

Here on Brazil people sell used things for high price, some people even try to fool other placing the price of a new, while on USA they give very nice prices for fast salles.

Last edited by All Darc; 09-21-2018 at 02:15 PM..
 
Old 09-21-2018, 02:24 PM   #2957 (permalink)
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 12,752

Acura TSX - '06 Acura TSX
90 day: 24.19 mpg (US)

Lafawnda - CBR600 - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - Dodge/Cummins - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Chevy ZR-2 - '03 Chevrolet S10 ZR2
90 day: 17.14 mpg (US)

Model Y - '24 Tesla Y LR AWD

Pacifica Hybrid - '21 Chrysler Pacifica Hybrid
90 day: 57.45 mpg (US)
Thanks: 4,316
Thanked 4,471 Times in 3,436 Posts
The US has less of a bargaining culture. Generally prices are as advertised, so that means sellers must list their best price from the beginning. Instead of haggling the price, we constantly have "sale" prices. It serves the same purpose as bargaining; to make the customer feel like they got a good deal.

I haven't been to Brazil, so I don't know if haggling is common in negotiating price. New vehicles and mattresses are 2 common items we still haggle the price for. I don't know why mattresses still carry such a high markup, and have salespeople we have to negotiate price with. Most all other goods have fixed prices with relatively low markup (profit margin).
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
 
The Following User Says Thank You to redpoint5 For This Useful Post:
aerohead (09-22-2018)
Old 09-21-2018, 03:12 PM   #2958 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,548
Thanks: 8,090
Thanked 8,880 Times in 7,328 Posts
I wish I could sell a used car for my asking price.

Energy Matters:FLAT PLATE VS. EVACUATED TUBE SOLAR HOT WATER COLLECTORS/

These evacuated tubes are more efficient (and expensive) than a flat plate collector. If these tubes were inclined on a N-S axis at an angle dependent on the latitude; and if they were spaced further apart, each with a reflective sleeve that rotates to maintain an orientation to the Sun — then they would be still more efficient.
__________________
.
.
Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________
.
.
Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
 
The Following User Says Thank You to freebeard For This Useful Post:
aerohead (09-22-2018)
Old 09-21-2018, 03:23 PM   #2959 (permalink)
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 12,752

Acura TSX - '06 Acura TSX
90 day: 24.19 mpg (US)

Lafawnda - CBR600 - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - Dodge/Cummins - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Chevy ZR-2 - '03 Chevrolet S10 ZR2
90 day: 17.14 mpg (US)

Model Y - '24 Tesla Y LR AWD

Pacifica Hybrid - '21 Chrysler Pacifica Hybrid
90 day: 57.45 mpg (US)
Thanks: 4,316
Thanked 4,471 Times in 3,436 Posts
I tried to give away toilets I had replaced once, and had no takers.

Then instead of calling them toilets, I called them thrones, and I got creative with marketing them. One of the Craigslisters was even inspired to write a poem based on my ad. They went in an instant.

Marketing is key.
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
 
The Following 3 Users Say Thank You to redpoint5 For This Useful Post:
aerohead (09-22-2018), niky (09-25-2018), Xist (09-22-2018)
Old 09-21-2018, 04:56 PM   #2960 (permalink)
Banned
 
Join Date: Feb 2018
Location: Brazil
Posts: 1,476
Thanks: 14
Thanked 363 Times in 327 Posts
The largest solar copncentrator in the world :

https://upload.wikimedia.org/wikiped..._in_Israel.jpg

But by looking the photovoltaic receiver, it looks to tiny, probable getting a concentration way higher than 1000 suns.

Can just water cool something like 10.000 suns of heat in such small space ?

 
The Following User Says Thank You to All Darc For This Useful Post:
aerohead (09-22-2018)
Closed Thread  Post New Thread


Tags
lies, opinion, reality, scam





Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com