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Power & Energy
Forum Anyone using alternative energy in their home
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  • Replies 4 replies
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  • alternative_energy
  • management
  • power_management
  • power_distribution
  • Technology
  • power_conversion
Related

Anyone using alternative energy in their home

Catwell
Catwell over 15 years ago
I remember, when I was younger, a friend of mine had a solar panel on his roof. I always thought it came in handy, provided a lot of power, saved the day in power outages, but I was wrong. My friend told me, it only gave the house a few minutes of power for only a few small devices during blackouts. That was 20 years ago, is in home generation worth it today?
 
Solar panels are more efficient today, batteries are more dense, turbines, geothermal solutions, and more, all exist for our homes. I've read of attempts to make several homes completely green, it seemed like a good effort. After they sink hundreds of thousands of dollars into making the experimental house greener, does it pay for itself, ever? My electric bill is about 80 dollars a month.  In comparison, the $100,000 spent to make a house use less electricity is equivalent to 104 years of my $80 a month. And I would have to pay all that up front.
 
But perhaps it's more about making a statement. Like voting for a third party in the USA, or diving a an expensive hybrid. It's saying, we want less dependence, we want to give back. Maybe someday less expensive solar panels will adorn all of our roofs.
 
 
 
For those who actually use alternative energy solutions, is there a lot of maintenance associated with the equipment?

Cabe
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  • Jorge_Garcia
    0 Jorge_Garcia over 15 years ago

    I agree with Enrico,

     

    Building your own PV cells is a major pain, they are EXTREMELY fragile, look at them the wrong way and they break.

     

    I think that a good experiment would be to see just how much power we can get from a PV cell by implementing an MPPT algorithm and solar tracking versus a stationary cell. My gut tells me that implementing those systems would improve the overall efficiency of the array(Obviously the MPPT hardware as well as the tracking setup consume energy however I don't think a carefully designed system would produce let power then a stand alone cell so at least some improvement would be observed).

     

    I've been wanting to perform such an experiment, but at the moment I don't have the means. The issue I see with the MPPT is that you control the input of a converter block to present an ideal load to the cell, the control loop will do whatever it takes to keep the solar cell producing peak output power therefore at the output we will have widely varying voltage(current) which wouldn't be easily usable. My solution to this would be to interface the output of the MPPT to a buck-boost topology converter(ZETA, SEPIC, Cuk, Buck-Boost, etc.) which would deal with the varying output of the MPPT.

     

    With a stable DC voltage an additional inverter would allow for the AC conversion. Obviously there are three stages here so the overall system efficiency would probably be in the 70-85% range(I don't know where I'm getting the numbers from my gut I guess)

     

    It's just an idea, and there are people much smarter than myself on this forum so I'm sure there will be lots of better suggestions.

     

    My 2 cents,

     

    Jorge Garcia

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  • Jorge_Garcia
    0 Jorge_Garcia over 15 years ago

    I agree with Enrico,

     

    Building your own PV cells is a major pain, they are EXTREMELY fragile, look at them the wrong way and they break.

     

    I think that a good experiment would be to see just how much power we can get from a PV cell by implementing an MPPT algorithm and solar tracking versus a stationary cell. My gut tells me that implementing those systems would improve the overall efficiency of the array(Obviously the MPPT hardware as well as the tracking setup consume energy however I don't think a carefully designed system would produce let power then a stand alone cell so at least some improvement would be observed).

     

    I've been wanting to perform such an experiment, but at the moment I don't have the means. The issue I see with the MPPT is that you control the input of a converter block to present an ideal load to the cell, the control loop will do whatever it takes to keep the solar cell producing peak output power therefore at the output we will have widely varying voltage(current) which wouldn't be easily usable. My solution to this would be to interface the output of the MPPT to a buck-boost topology converter(ZETA, SEPIC, Cuk, Buck-Boost, etc.) which would deal with the varying output of the MPPT.

     

    With a stable DC voltage an additional inverter would allow for the AC conversion. Obviously there are three stages here so the overall system efficiency would probably be in the 70-85% range(I don't know where I'm getting the numbers from my gut I guess)

     

    It's just an idea, and there are people much smarter than myself on this forum so I'm sure there will be lots of better suggestions.

     

    My 2 cents,

     

    Jorge Garcia

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