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The Remarkable Progress of Renewable Energy

Solar panels are usually able to process 15% to 22% of solar energy into usable energy, depending on factors like placement, orientation, weather conditions, and similar. The amount of sunlight that solar panel systems are able to convert into actual electricity is called performance, and the outcome determines the solar panel efficiency.

Solar electric systems have no moving parts, no high pressure steam, and no high temperatures. Turbines and high pressure steam systems require periodic maintenance and system shutdown. High pressure steam is dangerous.
They also provide little power too. 15 to 22% of sun's energy into electricity energy? I'm surprised Elon Musk isn't promising 150% efficient solar panels.
And high pressure steam is not particularly dangerous, if it's correctly managed.

Solar panels generate high voltages when exposed to sunlight, and cannot be switched off. This has resulted in the electrocution of installers and dismantlers of such systems.

Solar Panels (like high pressure steam, or indeed, like pretty much everything) are dangerous.

It remains a fact that solar power installations have killed more people just in the USA, just in the last twenty years, than nuclear power installations have killed worldwide in the whole of history - even if we accept the insane estimates of excess deaths from Chernobyl being touted by nutters like Greenpeace.

Nuclear power plants may of may not be "dangerous", but they're unavoidably less dangerous than any other way we have ever developed to make electricity.
 
I recently had a visit from a solar installation company. Despite that my house has no south-facing roof, my roof mainly has east and west sides, I was told that solor could on average provide all of my electrical needs. Basically make more than I need on sunny days and sell the excess to the grid, and buy it back at night with pretty much a net zero cost. I was unaware that solar had become so efficient.
It hasn't. They are lying.
 
I recently had a visit from a solar installation company. Despite that my house has no south-facing roof, my roof mainly has east and west sides, I was told that solor could on average provide all of my electrical needs. Basically make more than I need on sunny days and sell the excess to the grid, and buy it back at night with pretty much a net zero cost. I was unaware that solar had become so efficient.
It hasn't. They are lying.
To be fair, it's a very complex lie, and as a homeowner you can genuinely make savings - because the current market regulations mean that you will be subsidised by those electricity users who cannot or do not install home solar panels.

Mostly these are big commercial and industrial power users. The power companies are forced to buy your worthless solar power at a set rate, despite low (even negative) wholesale prices; Then they have to sell you expensive power at night time, usually at a retail flat rate that was set under the old regime when you were buying both expensive and cheap power.

All of this costs the utility a ton of money, and they recoup that by charging more to those non-residential customers.

It's a scam, but it's a scam in which both the installer and the homeowner are ripping off the electric company and/or the taxpayer. So you're not so much being scammed, as being asked to collude in scamming others.

Of course, it's not sustainable. The regulatory environment will eventually change, and you will be selling and buying electricity at the actual values at any given moment - which might well mean it's cheaper for you NOT to sell your excess generation to the grid, because the wholesale price when you have an excess will be less than $0.

You could put it in a battery instead; But then you have to pay for a battery. Which is likely more expensive than the electricity you could have bought instead. Particularly as it will need replacing at least every twenty years.

Right now, the renewable energy industry is funded by taxpayers money, and sustained by a round-robin of passing on hidden costs like a hot potato, until they land in Uncle Sam's hands, at which point they are paid for by the taxpayers.

It cannot last, but lots of folks will make a killing while it does. It's like bitcoin on steroids.
 
Actually, that isn’t necessarily true. Some states pay two prices a month, one infrastructure and one for energy usage.

The scam part is the math. A coworker showed me an estimate to digest. At the best of times, especially in cloudy Ohio, one breaks even when the panels have died. So in order to make it look better, they include absurd energy price hikes to show they are saving more money down the road by using solar. The increases just weren’t justifiable.

And then there is the issue of any guarantees of being paid for excess energy. This isn’t remotely warranteed. Without that, the time required to break even takes much longer.

There are some really disreputable solar contractors in the US. Leasing stuff out and making money on the loan interest.
 
It comes down to a lack o a national energy policy.

Leaving up to market forces results in a kluge.

If we expect to sustain economic growth as things are then there has to be a reliable energy supply.

All rotating electrical generators have a limited operating curve involving load, voltage, and output frequency. Solar electricity inverters do not have that problem. They can regulate from near zero to maximum load.


From the net modern reactors can regulate from 50 - 100% load.


About 25% of U.S. power plants can start up—going from being shut down to fully operating—within one hour, based on data collected in EIA’s annual survey of electric generators. Some power plants, especially those powered by coal and nuclear fuel, require more than half a day to reach full operations. The time it takes a power plant to reach full operations can affect the reliability and operations of the electric grid.

If it is a cold start nukes ca take a day. If the core is warm an hour or two. Nukes can idle.

There are predicable daily load changes versus time during the day. If you measure the voltage at a socket in your home you may see cringes throughout the day as local loads change.
 
And then there is the issue of any guarantees of being paid for excess energy. This isn’t remotely warranteed. Without that, the time required to break even takes much longer.
The more people there are generating solar power, the less that power is worth. It's already worth less than nothing in many places.

Why would people expect to be paid for something valueless, and for that payment to remain available to them forever?
 
My hope is that some day I'll be knocking down the house I grew up in on my parent's property (because I like the land better than my land) and put down a one story house with plenty of south-facing roof, heat-pump heat and AC and big batteries that can power the house though the night and extended rain days. I don't know how affordable or practical it would be but I'd like that.
 
My hope is that some day I'll be knocking down the house I grew up in on my parent's property (because I like the land better than my land) and put down a one story house with plenty of south-facing roof, heat-pump heat and AC and big batteries that can power the house though the night and extended rain days. I don't know how affordable or practical it would be but I'd like that.
I understand deep cycle marine batteries work quite well for home solar storage. Considering your location you should have access to lots of them on the used battery market.
 
Funny, Swiss just banned electric cars.

Not quite. Only considering bans on nonessential driving of EVs during winter elecrical power shortages. Strickly a limited emergency measure.
Those would be the power shortages due to reliance on gas, which is no longer available due to sanctions against Russia.

The reliance on gas was an inevitable consequence of building lots of intermittent power generation across Europe; When the wind doesn't blow and the sun doesn't shine (a common occurrence in wintertime), gas is the most effective way to fill the gaps.

Those power shortages are ultimately caused by trying to replace fossil power with intermittent renewables (which cannot actually be done) instead of nuclear (which could). Of course, the German insanity of closing nuclear plants at the same time has only made things worse.

The need for such "limited emergency measures" will continue to grow until people wake up and start building lots of nuclear power plants. I don't advise holding your breath.
 

And the fundamental flaw with such systems is the concept that you can buy it back as needed. The cost of providing grid electricity is a combination of the infrastructure costs and the fuel costs--they have been lumped as a single bill item but in reality solar has minimal effect on their infrastructure costs. Note that the majority of your electric bill actually represents infrastructure--and those costs won't go away as solar becomes more prevalent. Eventually we will have to stop forcing the utilities to eat these costs and solar suddenly becomes considerably more expensive than other sources of power.
You will not have to force the companies to eat those costs. Once they can get away with it they will pass those costs on.
 



Daily Insolation Parameters

Latitude: 40.780 Longitude: -73.970



Insolation at Specified Location

This web page produces a numerical table of sunrise, sunset, daily insolation at top of atmosphere, and sunlight-weighted cosine of the zenith angle at a single specified location. The produced table contains data for a single month, or if a month is not provided, data for a single calendar year. Latitude and longitude must be given in degrees and hundredths of degrees, not degrees and minutes. Default location is the Central Park weather station, New York City.

"Insolation" means sunlight received from the Sun at top-of-atmosphere. On a global annual basis, about 57% of insolation is incident on the Earth's surface. Clouds are the main cause of this decrease, but even clear sky will have some reduction. To determine incident sunlight at the surface, click to the "LINE PLOTS" web page, but there data is limited to monthly values on the Model's 4×3 degree resolution grid.


BYC January

Time Zone: Eastern Standard Time
(Longitudes -82.5 to -67.5) Sunlight
Weighted
Daily Cosine
Average of
Sunlight Zenith
Date Sunrise Sunset (W/m²) Angle
---- ------- ------ ------ -----
2012/01/01 7:20 16:39 154.47 0.350
02 7:20 16:39 155.14 0.351
03 7:20 16:40 155.87 0.352
04 7:20 16:41 156.65 0.353
05 7:20 16:42 157.50 0.354
06 7:20 16:43 158.40 0.356
07 7:20 16:44 159.36 0.357
08 7:20 16:45 160.38 0.359
09 7:2
Death Valley August

2012/08/01 4:54 18:53 452.99 0.739
02 4:55 18:52 451.61 0.738
03 4:56 18:51 450.19 0.737
04 4:57 18:50 448.75 0.736
05 4:58 18:49 447.27 0.735
06 4:58 18:48 445.77 0.734
07 4:59 18:47 444.24 0.732
08 5:00 18:46 442.68 0.731
09 5:01 18:45 441.09 0.730
10 5:02 18:44 439.48 0.728
11 5:03 18:43 437.83 0.727
12 5:03 18:41 436.16 0.726
13 5:04 18:40 434.46 0.724
14 5:05 18:39 432.73 0.723
15 5:06 18:38 430.98 0.721
16 5:07 18:37 429.20 0.719
17 5:07 18:35 427.39 0.718
18 5:08 18:34 425.55 0.716
19 5:09 18:33 423.69 0.714
20 5:10 18:32 421.80 0.713
21 5:11 18:30 419.89 0.711
22 5:11 18:29 417.95 0.709
23 5:12 18:28 415.98 0.707
24 5:13 18:26 413.99 0.705
25 5:14 18:25 411.97 0.703
26 5:15 18:24 409.93 0.701
27 5:15 18:22 407.87 0.699
28 5:16 18:21 405.78 0.697
29 5:17 18:19 403.67 0.695
30 5:18 18:18 401.53 0.693
31 5:19 18:17 399.37 0.690



as a rough estimate

Using 50w/m^2 at the surface, solar cell conversion deficiency = .2, and power conversion efficiency .5.

watts/m^ power genrated = 50w/m^2 * .2 * .5 = 5w/m^2 NYC



Solar-cell efficiency refers to the portion of energy in the form of sunlight that can be converted via photovoltaics into electricity by the solar cell.

The efficiency of the solar cells used in a photovoltaic system, in combination with latitude and climate, determines the annual energy output of the system. For example, a solar panel with 20% efficiency and an area of 1 m2 will produce 200 kWh/yr at Standard Test Conditions if exposed to the Standard Test Condition solar irradiance value of 1000 W/m2 for 2.74 hours a day. Usually solar panels are exposed to sunlight for longer than this in a given day, but the solar irradiance is less than 1000 W/m2 for most of the day. A solar panel can produce more when the sun is high in the sky and will produce less in cloudy conditions or when the sun is low in the sky, usually the sun is lower in the sky in the winter.

When it comes to regions, two important aspects that affect the solar PV industry's efficiency are the dispersion and intensity of solar radiation. These two variables vary greatly between each country.[1] The main global regions that get subjected to high radiations throughout the year are regions in Asia like the middle east, Northern Chile, Australia, China, and Southwestern USA.[1][2] In a high-yield solar area like central Colorado, which receives annual insolation of 2000 kWh/m2/year,[3] such a panel can be expected to produce 400 kWh of energy per year. However, in Michigan, which receives only 1400 kWh/m2/year,[3] annual energy yield will drop to 280 kWh for the same panel. At more northerly European latitudes, yields are significantly lower: 175 kWh annual energy yield in southern England under the same conditions.[4]
Schematic of charge collection by solar cells. Light transmits through transparent conducting electrode creating electron hole pairs, which are collected by both the electrodes. The absorption and collection efficiencies of a solar cell depend on the design of transparent conductors and active layer thickness.[5]

Several factors affect a cell's conversion efficiency value, including its reflectance, thermodynamic efficiency, charge carrier separation efficiency, charge carrier collection efficiency and conduction efficiency values.[6][5] Because these parameters can be difficult to measure directly, other parameters are measured instead, including quantum efficiency, open-circuit voltage (VOC) ratio, and § Fill factor. Reflectance losses are accounted for by the quantum efficiency value, as they affect "external quantum efficiency". Recombination losses are accounted for by the quantum efficiency, VOC ratio, and fill factor values. Resistive losses are predominantly accounted for by the fill factor value, but also contribute to the quantum efficiency and VOC ratio values. In 2019, the world record for solar cell efficiency at 47.1% was achieved by using multi-junction concentrator solar cells, developed at National Renewable Energy Laboratory, Golden, Colorado, USA.[7]


Solar panels are usually able to process 15% to 22% of solar energy into usable energy, depending on factors like placement, orientation, weather conditions, and similar. The amount of sunlight that solar panel systems are able to convert into actual electricity is called performance, and the outcome determines the solar panel efficiency.

Solar electric systems have no moving parts, no high pressure steam, and no high temperatures. Turbines and high pressure steam systems require periodic maintenance and system shutdown. High pressure steam is dangerous.
And yet at 2am in the morning the power output of your shiny 1GW solar array is 0W.
Solar is reliable yet intermittent. Granted the reliability is known.
 



Daily Insolation Parameters

Latitude: 40.780 Longitude: -73.970



Insolation at Specified Location

This web page produces a numerical table of sunrise, sunset, daily insolation at top of atmosphere, and sunlight-weighted cosine of the zenith angle at a single specified location. The produced table contains data for a single month, or if a month is not provided, data for a single calendar year. Latitude and longitude must be given in degrees and hundredths of degrees, not degrees and minutes. Default location is the Central Park weather station, New York City.

"Insolation" means sunlight received from the Sun at top-of-atmosphere. On a global annual basis, about 57% of insolation is incident on the Earth's surface. Clouds are the main cause of this decrease, but even clear sky will have some reduction. To determine incident sunlight at the surface, click to the "LINE PLOTS" web page, but there data is limited to monthly values on the Model's 4×3 degree resolution grid.


BYC January

Time Zone: Eastern Standard Time
(Longitudes -82.5 to -67.5) Sunlight
Weighted
Daily Cosine
Average of
Sunlight Zenith
Date Sunrise Sunset (W/m²) Angle
---- ------- ------ ------ -----
2012/01/01 7:20 16:39 154.47 0.350
02 7:20 16:39 155.14 0.351
03 7:20 16:40 155.87 0.352
04 7:20 16:41 156.65 0.353
05 7:20 16:42 157.50 0.354
06 7:20 16:43 158.40 0.356
07 7:20 16:44 159.36 0.357
08 7:20 16:45 160.38 0.359
09 7:2
Death Valley August

2012/08/01 4:54 18:53 452.99 0.739
02 4:55 18:52 451.61 0.738
03 4:56 18:51 450.19 0.737
04 4:57 18:50 448.75 0.736
05 4:58 18:49 447.27 0.735
06 4:58 18:48 445.77 0.734
07 4:59 18:47 444.24 0.732
08 5:00 18:46 442.68 0.731
09 5:01 18:45 441.09 0.730
10 5:02 18:44 439.48 0.728
11 5:03 18:43 437.83 0.727
12 5:03 18:41 436.16 0.726
13 5:04 18:40 434.46 0.724
14 5:05 18:39 432.73 0.723
15 5:06 18:38 430.98 0.721
16 5:07 18:37 429.20 0.719
17 5:07 18:35 427.39 0.718
18 5:08 18:34 425.55 0.716
19 5:09 18:33 423.69 0.714
20 5:10 18:32 421.80 0.713
21 5:11 18:30 419.89 0.711
22 5:11 18:29 417.95 0.709
23 5:12 18:28 415.98 0.707
24 5:13 18:26 413.99 0.705
25 5:14 18:25 411.97 0.703
26 5:15 18:24 409.93 0.701
27 5:15 18:22 407.87 0.699
28 5:16 18:21 405.78 0.697
29 5:17 18:19 403.67 0.695
30 5:18 18:18 401.53 0.693
31 5:19 18:17 399.37 0.690



as a rough estimate

Using 50w/m^2 at the surface, solar cell conversion deficiency = .2, and power conversion efficiency .5.

watts/m^ power genrated = 50w/m^2 * .2 * .5 = 5w/m^2 NYC



Solar-cell efficiency refers to the portion of energy in the form of sunlight that can be converted via photovoltaics into electricity by the solar cell.

The efficiency of the solar cells used in a photovoltaic system, in combination with latitude and climate, determines the annual energy output of the system. For example, a solar panel with 20% efficiency and an area of 1 m2 will produce 200 kWh/yr at Standard Test Conditions if exposed to the Standard Test Condition solar irradiance value of 1000 W/m2 for 2.74 hours a day. Usually solar panels are exposed to sunlight for longer than this in a given day, but the solar irradiance is less than 1000 W/m2 for most of the day. A solar panel can produce more when the sun is high in the sky and will produce less in cloudy conditions or when the sun is low in the sky, usually the sun is lower in the sky in the winter.

When it comes to regions, two important aspects that affect the solar PV industry's efficiency are the dispersion and intensity of solar radiation. These two variables vary greatly between each country.[1] The main global regions that get subjected to high radiations throughout the year are regions in Asia like the middle east, Northern Chile, Australia, China, and Southwestern USA.[1][2] In a high-yield solar area like central Colorado, which receives annual insolation of 2000 kWh/m2/year,[3] such a panel can be expected to produce 400 kWh of energy per year. However, in Michigan, which receives only 1400 kWh/m2/year,[3] annual energy yield will drop to 280 kWh for the same panel. At more northerly European latitudes, yields are significantly lower: 175 kWh annual energy yield in southern England under the same conditions.[4]
Schematic of charge collection by solar cells. Light transmits through transparent conducting electrode creating electron hole pairs, which are collected by both the electrodes. The absorption and collection efficiencies of a solar cell depend on the design of transparent conductors and active layer thickness.[5]

Several factors affect a cell's conversion efficiency value, including its reflectance, thermodynamic efficiency, charge carrier separation efficiency, charge carrier collection efficiency and conduction efficiency values.[6][5] Because these parameters can be difficult to measure directly, other parameters are measured instead, including quantum efficiency, open-circuit voltage (VOC) ratio, and § Fill factor. Reflectance losses are accounted for by the quantum efficiency value, as they affect "external quantum efficiency". Recombination losses are accounted for by the quantum efficiency, VOC ratio, and fill factor values. Resistive losses are predominantly accounted for by the fill factor value, but also contribute to the quantum efficiency and VOC ratio values. In 2019, the world record for solar cell efficiency at 47.1% was achieved by using multi-junction concentrator solar cells, developed at National Renewable Energy Laboratory, Golden, Colorado, USA.[7]


Solar panels are usually able to process 15% to 22% of solar energy into usable energy, depending on factors like placement, orientation, weather conditions, and similar. The amount of sunlight that solar panel systems are able to convert into actual electricity is called performance, and the outcome determines the solar panel efficiency.

Solar electric systems have no moving parts, no high pressure steam, and no high temperatures. Turbines and high pressure steam systems require periodic maintenance and system shutdown. High pressure steam is dangerous.
And yet at 2am in the morning the power output of your shiny 1GW solar array is 0W.
Solar is reliable yet intermittent. Granted the reliability is known.
Well, up to a point, and depending on climate.

You will get some power out of them most days, but if it's cloudy you'll get a lot less than if it's sunny. And, unlike sun angle, cloud cover doesn't vary predictably over time.

Solar is a little bit reliable, yet intermittent.
 
California senate transport committee passes solar parking canopy and highwayside law – pv magazine USA - "The bipartisan committee unanimously approved a bill to support tax credits for solar canopies over parking lots and along highways."

That's the California Senate Transportation Committee, by 11-0. Then the CA Senate Governance and Finance Committee, and then the CA Senate Appropriations Committee.
The bill includes two main provisions. First, it provides a sales tax exemption for the materials to build solar canopies over parking lots. Second, it requires the state to develop a plan to make its highway rights-of-way available for solar, energy storage and transmission infrastructure. By leasing state-controlled land along highways for solar power, California can earn revenue from lease payments and save money through avoided maintenance costs of leased areas.

Makes MUCH more sense than solar roadways.

Target's solar panel carports at California store may be a green model
  • Target has turned a California location into its most sustainable store.
  • Solar panels on the roof and carports will power the entire store, from its refrigeration to its heating and air conditioning.
  • It could become a new model for the national retailer, as it sets goals to reduce carbon emissions and works to signal to customers and investors that it’s serious about sustainability.

...
The panels, high above the parking lot, will produce enough renewable energy to power the entire store, from its refrigeration to its heating and air conditioning, the retail chain says. And the towering structures outside offer a striking visual clue into the environmentally conscious efforts going on inside the store.

In aisles with items like milk, ice cream and frozen pizza, refrigerators and freezers will use a natural refrigerant to cut back on emissions. All sales floor lighting has been replaced with LED, and back outside, customers who arrive in electric cars can charge them in the parking lot.

The Target location in Vista, Calif., about 40 miles north of San Diego, has become the company’s most sustainable store — and could become a national model for the retailer. Target previously installed solar panels on the location’s rooftop, which power a portion of the store.
 Climate of San Diego -- Mediterranean / semiarid -- mostly sunny summers. So it will get the most solar-panel electricity when it needs that electricity the most.
 
Maryland passes laws to expand community solar and energy storage - "A pair of bills have been approved by Maryland lawmakers to make permanent the state's community solar program and set a target of 3 GW of energy storage capacity by 2033."

From the text of MD H 910, "COMPETITIVE PROCUREMENT MECHANISMS TO REACH A MINIMUM OF 3,000 MEGAWATTS OF ENERGY STORAGE BY THE END OF DELIVERY YEAR 2033;"

That strikes me as a flub. Watts are an energy rate, joules per second, not an energy amount, what one would specify for energy storage. It would make more sense if that was some number of watt-hours.

From US Electricity Profile 2021 - U.S. Energy Information Administration (EIA) Maryland generates electricity at a rate of 4.3 GW and consumes it at a rate of 6.8 GW.
 
World's deepest wind turbine foundation installed off Scottish coast
SSE Renewables has announced the successful installation of a wind turbine foundation at a depth of 58.6 meters off the coast of Angus, Scotland.

Installation took place at the Seagreen wind farm, a project resulting from a £3 billion ($3.7 billion) joint venture between SSE Renewables and TotalEnergies.

It’s said to be the world’s deepest wind turbine foundation, topping a previous Seagreen record of 57.4 meters (approximately 188 feet) set in October 2022.

According to SSE Renewables, the foundation was transported to the project site on a barge operated by Seaway 7. The semisubmersible crane vessel, Saipem 7000, then lifted each of the 2,000-tonne turbine foundations into place.
"When complete, the 1.1GW Seagreen wind farm will be capable of generating around 5,000 GWh of renewable energy annually, enough to power more than 1.6 million UK homes."

That's an expected delivery rate of 0.57 GW, about half of the nominal capacity of 1.1 GW.

Seagreen Wind Energy - Home
 
Chile’s ambitious renewable energy goals
A report by Ember found that Chile hit its peak coal consumption in 2016. From 2000 to 2016 coal generation grew 258%, while related carbon emissions rose 165%. While the demand for electricity has risen 11% from 2016-2021, power sector emissions have fallen 6%. This is due to the 13 TWh of added wind and solar generation during this period. This emission reduction is expected to continue at an increasing rate, as this study estimated emissions reductions of as high as 27% in 2022.

Perhaps the most telling statistic in the transition to renewable energy in Chile is that for the first time in its history, Chile is generating more of its electricity from solar and wind than from coal.

From October 2021 to October 2022, Chile produced 27.5% of its electricity from solar and wind, whereas coal produced 26.5% of the electricity.


Can compressed air energy storage solve the long-duration dilemma?
Batteries are good for short-term storage, and they have gotten a lot of support.
But what about long-term storage? It is vitally needed to fully capitalize on renewable generation. Wind generally blows strongest during the night and in the early morning. It tends to be available mainly at off-peak times. The sun is more regular. The daylight hours can be predicted with more confidence. Solar provides plenty of power during the day but drops off as the afternoon progresses. Wind and solar often produce more power at certain times than can be consumed by the grid. A means of storing this excess energy is needed so it can be used when wind or solar energy may not be available.
CAES works by pumping air into a storage cavern, and then releasing it and running generators with it.
 
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