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Index » Regional/Local » USA/Canada » Solar / Wind / Geothermal / Efficiency Energy Page: 1, 2, 3 ... 38, 39, 40  Next
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rhahl

rhahl Avatar



Posted: Apr 17, 2021 - 7:19am

Solar-to-Hydrogen Tech Sees "Remarkable" Efficiency Jump

https://spectrum.ieee.org/energywise/energy/renewables/solar-to-hydrogen-remarkable-efficiency-jump
 
Here comes hydrogen as a serious fuel. One trouble is it leaks right through most pipe materials.
R_P

R_P Avatar



Posted: Feb 17, 2021 - 11:27am

Energy "independence"
The crisis highlighted a deeper warning for power systems throughout the country. Electric grids can be engineered to handle a wide range of severe conditions — as long as grid operators can reliably predict the dangers ahead. But as climate change accelerates, many electric grids will face novel and extreme weather events that go beyond the historical conditions those grids were designed for, putting the systems at risk of catastrophic failure.

westslope

westslope Avatar

Location: BC sage brush steppe


Posted: Feb 17, 2021 - 7:48am

500 Walmarts forced to close due to the weather?   

Now we know that storm is serious!  
westslope

westslope Avatar

Location: BC sage brush steppe


Posted: Feb 17, 2021 - 6:59am



 Proclivities wrote:


 westslope wrote:
Texas wind turbines freeze as Texas orders rolling black outs

Huh!?!!   

Should we Canadians order care packages of white lithium grease and send them to Texas? Or do Texans need lessons in risk management? 

I would really like somebody familiar with the technology of these wind turbines to explain to me how they managed to freeze. I do not recall wind turbines in cold oceans such as the North Atlantic freezing.

 
Apparently, wind turbines used in predictably-cold locations can have heating systems installed in them for their gearboxes and other components.  The present temperatures in many parts of Texas are well below normal ranges for those areas, such an idea may never have come up for them.

Somewhat interesting article:  Wind Energy in Cold Climates
 

Thanks Proclivities.   The Natural Resource Canada ministry website is informative.  I have learned a lot about wind turbines and Texas grid management over the past couple of days.  

I gather that wind turbines can be cold weather-proofed like just about everything else.

Some US pundits appear to have a negative view of Texas management.  According to Julian Lee at bloomberg.com, Texan politicians may be blaming green energy but apparently conventional sources were impacted even harder.   

Blame Texas Exceptionalism For This Crisis, Not Green Energy
 - Julian Lee, Bloomberg
It’s time the state prepared its power supply for more cold winters.


Two reflections:

1.  Given the numbers I am hearing/reading, Texas did a bad job of risk management.    People died.  

2.  When are supposedly educated, bright Americans going to take anthropogenic climate disruption seriously?  
haresfur

haresfur Avatar

Location: The Golden Triangle
Gender: Male


Posted: Feb 15, 2021 - 10:41pm



 Proclivities wrote:


 westslope wrote:
Texas wind turbines freeze as Texas orders rolling black outs

Huh!?!!   

Should we Canadians order care packages of white lithium grease and send them to Texas? Or do Texans need lessons in risk management? 

I would really like somebody familiar with the technology of these wind turbines to explain to me how they managed to freeze. I do not recall wind turbines in cold oceans such as the North Atlantic freezing.

 
Apparently, wind turbines used in predictably-cold locations can have heating systems installed in them for their gearboxes and other components.  The present temperatures in many parts of Texas are well below normal ranges for those areas, such an idea may never have come up for them.

Somewhat interesting article:  Wind Energy in Cold Climates
 
I read Texas has a nuke shutdown, too. You would think those things could stay warm enough.

ScottFromWyoming

ScottFromWyoming Avatar

Location: Powell
Gender: Male


Posted: Feb 15, 2021 - 9:01pm



 Manbird wrote:


 westslope wrote:
-Texas wind turbines BAND NAME freeze as Texas orders -rolling black outs BAND NAME



 


Manbird

Manbird Avatar

Location: Oroville, Ca
Gender: Male


Posted: Feb 15, 2021 - 5:31pm



 westslope wrote:
-Texas wind turbines BAND NAME freeze as Texas orders -rolling black outs BAND NAME

Huh!?!!   

Should we Canadians order -care packages BAND NAME of -white lithium grease BAND NAME and -send them to Texas BAND NAME Or do -Texans need lessons BAND NAME in risk management? 

I would really like somebody familiar with the technology of these wind turbines to explain to me how they managed to freeze. -I do not recall BAND NAME wind turbines -in cold oceans BAND NAME such as the -North Atlantic freezing BAND NAME.

 


ScottFromWyoming

ScottFromWyoming Avatar

Location: Powell
Gender: Male


Posted: Feb 15, 2021 - 1:25pm



 Proclivities wrote:


 westslope wrote:
Texas wind turbines freeze as Texas orders rolling black outs

Huh!?!!   

Should we Canadians order care packages of white lithium grease and send them to Texas? Or do Texans need lessons in risk management? 

I would really like somebody familiar with the technology of these wind turbines to explain to me how they managed to freeze. I do not recall wind turbines in cold oceans such as the North Atlantic freezing.

 
Apparently, wind turbines used in predictably-cold locations can have heating systems installed in them for their gearboxes and other components.  The present temperatures in many parts of Texas are well below normal ranges for those areas, such an idea may never have come up for them.

Somewhat interesting article:  Wind Energy in Cold Climates
 

I imagine the ramifications of even a little more ice on one blade than another could be catastrophic.
Proclivities

Proclivities Avatar

Location: Paris of the Piedmont
Gender: Male


Posted: Feb 15, 2021 - 1:09pm



 westslope wrote:
Texas wind turbines freeze as Texas orders rolling black outs

Huh!?!!   

Should we Canadians order care packages of white lithium grease and send them to Texas? Or do Texans need lessons in risk management? 

I would really like somebody familiar with the technology of these wind turbines to explain to me how they managed to freeze. I do not recall wind turbines in cold oceans such as the North Atlantic freezing.

 
Apparently, wind turbines used in predictably-cold locations can have heating systems installed in them for their gearboxes and other components.  The present temperatures in many parts of Texas are well below normal ranges for those areas, such an idea may never have come up for them.

Somewhat interesting article:  Wind Energy in Cold Climates
westslope

westslope Avatar

Location: BC sage brush steppe


Posted: Feb 15, 2021 - 8:28am

Texas wind turbines freeze as Texas orders rolling black outs

Huh!?!!   

Should we Canadians order care packages of white lithium grease and send them to Texas? Or do Texans need lessons in risk management? 

I would really like somebody familiar with the technology of these wind turbines to explain to me how they managed to freeze. I do not recall wind turbines in cold oceans such as the North Atlantic freezing.

R_P

R_P Avatar



Posted: Aug 6, 2020 - 7:41pm

China poised to power huge growth in global offshore wind energy
islander

islander Avatar

Location: Seattle
Gender: Male


Posted: May 20, 2020 - 7:18am



 Red_Dragon wrote:


 islander wrote:

Interesting, but there just isn't much energy available in a system like that. Triboelectrics had a bit of a burst a few years ago, but energy yields are tiny.  I spend a lot of time managing people's expectations for solar as it is now, I can't wait to see what I get when they find this article. 

 

To whom should I send it? 

 
info@dev.nul

Red_Dragon

Red_Dragon Avatar



Posted: May 20, 2020 - 6:52am



 islander wrote:

Interesting, but there just isn't much energy available in a system like that. Triboelectrics had a bit of a burst a few years ago, but energy yields are tiny.  I spend a lot of time managing people's expectations for solar as it is now, I can't wait to see what I get when they find this article. 

 

To whom should I send it? 
islander

islander Avatar

Location: Seattle
Gender: Male


Posted: May 20, 2020 - 6:43am



 Red_Dragon wrote:
 
Interesting, but there just isn't much energy available in a system like that. Triboelectrics had a bit of a burst a few years ago, but energy yields are tiny.  I spend a lot of time managing people's expectations for solar as it is now, I can't wait to see what I get when they find this article. 

Red_Dragon

Red_Dragon Avatar



Posted: May 20, 2020 - 5:16am

New solar panels created by Chinese researchers take energy from the friction of falling raindrops, as well as the sun, so it’s an effective source of renewable energy all year round.
Red_Dragon

Red_Dragon Avatar



Posted: Jan 2, 2020 - 3:48pm

Update On Wind Turbines and Birds
ColdMiser

ColdMiser Avatar

Location: On the Trail
Gender: Male


Posted: Nov 22, 2019 - 6:50am



 cc_rider wrote:


 haresfur wrote:


 cc_rider wrote:


 haresfur wrote:
a friend worked for a company that had a very efficient generator for turning heat from a solar tracking mirror into electricity. the cool thing was that it could use any heat source so they could park the mirror at night over a gas flame and continue to generate

the company failed because of cash flow, not because of the technology
 
The idea is pretty simple: use focused solar energy to heat water (or other carrier: I've heard liquid sodium is ideal) to make super-heated steam to power turbines. At night just use a gas burner or excess heat from a cement kiln or whatever.  The big solar arrays I've heard about have a problem with too much heat. They have to de-focus the mirrors to keep from burning up the piping.

A big problem is birds, though. As you get closer to the 'furnace', the solar rays get more focused, i.e. hotter. Apparently it'll vaporize anything that gets too close. Your Thanksgiving turkey is ready in three seconds flat though.
c.

 

Actually, the neat thing was that their system was much simpler. The sunlight was focused onto a linear-drive Stirling engine. Basically a shaft held by bearings that looked like the inserts for 45 records (I assume everyone here are old farts and I don't need to explain what those are). In a nutshell, the heat drives the shaft back and forth through a coil, generating electricity. The parts were simple enough that they thought they could repurpose a closed auto manufacturing plant for production. If I recall, their biggest unit was 3 kW.

I can't remember the conversion efficiency, but it was significantly higher than photovoltaic panels and didn't use fancy silicon. Also solar panel efficiency degrades with time. The tradeoff is having the disk reflector and having to keep it tracking the sun.

They were selling units to the military as generators using diesel as the heat source. More efficient than conventional generators. Not that the price is significant to them, but it turns out driving fuel trucks around a war zone is a dangerous job and the less fuel you move, the safer your troops. As a sideline, they could essentially run the system in reverse as a refrigerator. You can get people to stay hydrated with 30 C water but it's really hard to get them to drink 40 C water.

The boss was trying to set up systems in little villages in Bangladesh. One person power companies that could make a living charging cell phones, etc.
 Sounds really cool. It's a shame it's so hard to get alternative energy projects going. To be fair, they require a big initial investment.
c.


 
Good point, you can lead a horse to water but you can't make him pay for the drink

cc_rider

cc_rider Avatar

Location: Bastrop
Gender: Male


Posted: Nov 21, 2019 - 1:05pm



 haresfur wrote:


 cc_rider wrote:


 haresfur wrote:
a friend worked for a company that had a very efficient generator for turning heat from a solar tracking mirror into electricity. the cool thing was that it could use any heat source so they could park the mirror at night over a gas flame and continue to generate

the company failed because of cash flow, not because of the technology
 
The idea is pretty simple: use focused solar energy to heat water (or other carrier: I've heard liquid sodium is ideal) to make super-heated steam to power turbines. At night just use a gas burner or excess heat from a cement kiln or whatever.  The big solar arrays I've heard about have a problem with too much heat. They have to de-focus the mirrors to keep from burning up the piping.

A big problem is birds, though. As you get closer to the 'furnace', the solar rays get more focused, i.e. hotter. Apparently it'll vaporize anything that gets too close. Your Thanksgiving turkey is ready in three seconds flat though.
c.

 

Actually, the neat thing was that their system was much simpler. The sunlight was focused onto a linear-drive Stirling engine. Basically a shaft held by bearings that looked like the inserts for 45 records (I assume everyone here are old farts and I don't need to explain what those are). In a nutshell, the heat drives the shaft back and forth through a coil, generating electricity. The parts were simple enough that they thought they could repurpose a closed auto manufacturing plant for production. If I recall, their biggest unit was 3 kW.

I can't remember the conversion efficiency, but it was significantly higher than photovoltaic panels and didn't use fancy silicon. Also solar panel efficiency degrades with time. The tradeoff is having the disk reflector and having to keep it tracking the sun.

They were selling units to the military as generators using diesel as the heat source. More efficient than conventional generators. Not that the price is significant to them, but it turns out driving fuel trucks around a war zone is a dangerous job and the less fuel you move, the safer your troops. As a sideline, they could essentially run the system in reverse as a refrigerator. You can get people to stay hydrated with 30 C water but it's really hard to get them to drink 40 C water.

The boss was trying to set up systems in little villages in Bangladesh. One person power companies that could make a living charging cell phones, etc.
 Sounds really cool. It's a shame it's so hard to get alternative energy projects going. To be fair, they require a big initial investment.
c.


haresfur

haresfur Avatar

Location: The Golden Triangle
Gender: Male


Posted: Nov 21, 2019 - 12:49pm



 cc_rider wrote:


 haresfur wrote:
a friend worked for a company that had a very efficient generator for turning heat from a solar tracking mirror into electricity. the cool thing was that it could use any heat source so they could park the mirror at night over a gas flame and continue to generate

the company failed because of cash flow, not because of the technology
 
The idea is pretty simple: use focused solar energy to heat water (or other carrier: I've heard liquid sodium is ideal) to make super-heated steam to power turbines. At night just use a gas burner or excess heat from a cement kiln or whatever.  The big solar arrays I've heard about have a problem with too much heat. They have to de-focus the mirrors to keep from burning up the piping.

A big problem is birds, though. As you get closer to the 'furnace', the solar rays get more focused, i.e. hotter. Apparently it'll vaporize anything that gets too close. Your Thanksgiving turkey is ready in three seconds flat though.
c.

 

Actually, the neat thing was that their system was much simpler. The sunlight was focused onto a linear-drive Stirling engine. Basically a shaft held by bearings that looked like the inserts for 45 records (I assume everyone here are old farts and I don't need to explain what those are). In a nutshell, the heat drives the shaft back and forth through a coil, generating electricity. The parts were simple enough that they thought they could repurpose a closed auto manufacturing plant for production. If I recall, their biggest unit was 3 kW.

I can't remember the conversion efficiency, but it was significantly higher than photovoltaic panels and didn't use fancy silicon. Also solar panel efficiency degrades with time. The tradeoff is having the disk reflector and having to keep it tracking the sun.

They were selling units to the military as generators using diesel as the heat source. More efficient than conventional generators. Not that the price is significant to them, but it turns out driving fuel trucks around a war zone is a dangerous job and the less fuel you move, the safer your troops. As a sideline, they could essentially run the system in reverse as a refrigerator. You can get people to stay hydrated with 30 C water but it's really hard to get them to drink 40 C water.

The boss was trying to set up systems in little villages in Bangladesh. One person power companies that could make a living charging cell phones, etc.
cc_rider

cc_rider Avatar

Location: Bastrop
Gender: Male


Posted: Nov 21, 2019 - 9:02am



 haresfur wrote:
a friend worked for a company that had a very efficient generator for turning heat from a solar tracking mirror into electricity. the cool thing was that it could use any heat source so they could park the mirror at night over a gas flame and continue to generate

the company failed because of cash flow, not because of the technology
 
The idea is pretty simple: use focused solar energy to heat water (or other carrier: I've heard liquid sodium is ideal) to make super-heated steam to power turbines. At night just use a gas burner or excess heat from a cement kiln or whatever.  The big solar arrays I've heard about have a problem with too much heat. They have to de-focus the mirrors to keep from burning up the piping.

A big problem is birds, though. As you get closer to the 'furnace', the solar rays get more focused, i.e. hotter. Apparently it'll vaporize anything that gets too close. Your Thanksgiving turkey is ready in three seconds flat though.
c.

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