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Author Topic: Mining and Solar Electricity  (Read 4333 times)
hulk
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May 23, 2014, 12:32:01 AM
 #41

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solar has had a more harmful impact on humanity overall [than nuclear].

To quote something I read somewhere:

Quote
feel free to convince me ... with some real numbers.

Why is solar more harmful then nuclear? They release less green house gas and no nuclear waste...

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May 23, 2014, 03:05:33 AM
 #42

Quote
solar has had a more harmful impact on humanity overall [than nuclear].

To quote something I read somewhere:

Quote
feel free to convince me ... with some real numbers.

Why is solar more harmful then nuclear? They release less green house gas and no nuclear waste...

Read message #23 in this thread, which sites a reference saying the following (in summary):

"On the basis of lifetime kWh out vs fossil fuel unit used to construct, nuclear plants put out more kWh than solar plants".

This may be true, but it ignores accidents, waste management, military deaths to protect, etc.

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May 23, 2014, 03:13:12 AM
 #43

Small-scale generators tent to be less efficient than large central plants.

However, large scale plants have to send the power longer distances.

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May 23, 2014, 01:45:23 PM
 #44

Quote
solar has had a more harmful impact on humanity overall [than nuclear].

To quote something I read somewhere:

Quote
feel free to convince me ... with some real numbers.
speechless

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May 23, 2014, 01:49:38 PM
 #45

Quote
solar has had a more harmful impact on humanity overall [than nuclear].

To quote something I read somewhere:

Quote
feel free to convince me ... with some real numbers.
speechless

Then you should be ready for this. https://bitcointalk.org/index.php?topic=619852.0
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May 23, 2014, 02:02:55 PM
 #46

Quote
solar has had a more harmful impact on humanity overall [than nuclear].

To quote something I read somewhere:

Quote
feel free to convince me ... with some real numbers.
speechless

Then you should be ready for this. https://bitcointalk.org/index.php?topic=619852.0
lol... just when i thought it couldnt get any better

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June 01, 2014, 01:27:31 PM
 #47

Bitcoin has gotten a lot of attention.But I wish people would stop wasting energy.
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June 01, 2014, 02:09:07 PM
 #48

How much would it cost to power the average PC 24 hours a day, 7 days a week using Solar ?
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June 02, 2014, 12:22:20 AM
 #49

How much would it cost to power the average PC 24 hours a day, 7 days a week using Solar ?

200W load
8760 hours
1752 kWh needed annually

New Jersey  1400kWh annually per fixed tilt kW of PV:  need 1.25kWpdc of PV / 0.8 DC:AC ratio (performance ratio) = 1.56kWpdc of PV
California 1600kWh annualy per fixed tilt kW of PV: need 1.37kWpdc of PV
Arizona 1800kWh annually per fixed tilt kW of PV:  need 1.215kWpdc of PV

Single Axis Tracking:  125% annual kWh compared to FT (fixed tilt) = 80% PV needed.  Not available for roof-mounted systems.
Dual Axis tracking:  140% annual kWh compared to FT = 70% PV needed.  Not available for roof-mounted systems


Capital Costs:  dependent on rebates offered by state, utility, etc.

For back of envelope, use $3000/kW installed for fixed tilt systems.  Add 25% for SAT, 40% for DAT (vendors can do the math, too.)

Leasing options:  too complicated (I don't know).

NOTE:  This assumes a grid-tied PV system.  For an off-grid system, more equipment, more complications, more cost, less reliability.





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June 02, 2014, 08:56:17 AM
 #50

Bitcoin has gotten a lot of attention.But I wish people would stop wasting energy.

I often hear this from nature activists and groups like that. Yes, mining coins (and by that, making transactions possible) does take a lot of energy. Yes, it was better if this didn't took as much energy as it does now, but you know this "difficulty" makes the coin gain value.

Now, the current system of banks. I think they use even more energy for ordinary transactions of money..

<< Curently quite inactive as I'm really busy in my private life. I will get back soon! >>
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June 02, 2014, 10:04:56 AM
 #51

I always wanted to use green energy simply to be independent. I don't mind paying for electricity but i want to have some backup in case a lightning strikes or something. I remember few years ago a substation transformer blew and we had no power for almost a day.


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September 15, 2014, 08:41:50 AM
 #52

Hi.  I need some experienced mining folks to give me some feedback.  I work for one of the largest residential solar installers in Arizona and we are also in California.  Our cash payment customers are getting their electricity between $0.04 and $0.06/kWh.  There's been a trend in solar to "oversize" systems by 20-30%.  By this i mean, if a customer is using 10,000 kWh/yr they may purchase a system that's generating between 12,000 and 13,000 kWh/yr.  Personally, I don't like to oversize systems because the "extra" electricity is sold back to the utility company at the end of the year at "wholesale" rates (read: less than what they are paying for the electricity).  It occurred to me that bitcoin mining may be a great way to go for some of these homeowners.  For example:  Over the course of a year the PV system overproduces 2,000 kWh of electricity.  As opposed to selling that electricity back to the utility company at say $0.04/kWh it may be better to drop off a "bit coin rig" at the customers house that's capable of using up the extra 2,000 kWh in the course of say a week.

Questions:
Is it feasible to install a rig of that size at someones home?
How many coins would it likely mint?
From your experience mining bitcoins would profit sharing with the home owner be preferable to say $0.07/ kWh?
Considering hardware costs, is this even a worthwhile endeavor?

I am here in Arizona also and heat would be an issue in the summer, so make sure to add the extra AC cooling needed to run the miner.

You could get away with a swamp cooler when its not the rainy season, but I am sure your customers would hate the heat they put out.

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September 15, 2014, 09:52:44 AM
 #53

I always wanted to use green energy simply to be independent. I don't mind paying for electricity but i want to have some backup in case a lightning strikes or something. I remember few years ago a substation transformer blew and we had no power for almost a day.

Just 1 day is not too bad, 3 days is worse!!
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September 18, 2014, 12:20:26 PM
 #54

Have yo guys checked out solarcoin?  They have a new thread up on here and are about to switch to pos.
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September 20, 2014, 03:59:02 AM
 #55

Bitcoin has gotten a lot of attention.But I wish people would stop wasting energy.

I often hear this from nature activists and groups like that. Yes, mining coins (and by that, making transactions possible) does take a lot of energy. Yes, it was better if this didn't took as much energy as it does now, but you know this "difficulty" makes the coin gain value.

Now, the current system of banks. I think they use even more energy for ordinary transactions of money..

but coin is heavier than paper money, and feel free to convince me money transaction costs more energy than mining coins.
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September 21, 2014, 10:10:07 PM
 #56

Bitcoin has gotten a lot of attention.But I wish people would stop wasting energy.

I often hear this from nature activists and groups like that. Yes, mining coins (and by that, making transactions possible) does take a lot of energy. Yes, it was better if this didn't took as much energy as it does now, but you know this "difficulty" makes the coin gain value.

Now, the current system of banks. I think they use even more energy for ordinary transactions of money..

but coin is heavier than paper money, and feel free to convince me money transaction costs more energy than mining coins.

Sure. Let's factor in everyone that is employed by the banking system - the energy cost of paying them and putting them in an office and making them productive workers and their car rides to and from work and their A/C and computers and all the rest - just as a start....
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