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Sun Volt Solar Blog

earth, the final frontier

Clean Energy, Clean Environment

We are at a cross roads in human history, we can choose to continue on as we have been, or we can make a change to improve our future and quite possibly the future for several generations to come. We are here to promote energy independence, a better environment with a higher return on investment for your hard earned money. It is what I believe in, it is why I am in the solar business.

A false sense of security

19 Nov 08 | Conservation, Environment

I continue to watch in amazement as fuel oil prices (and energy prices in general) plumet from there summer time record highs.  Home heating oil has decreased by nearly 38%, from $4.80/gallon to the current price of $3.018/gallon.

The reason given on most news channels is the demand dropping off due to the bad economy.  Maybe, but I have another theory.  Demand is off by roughtly 5.2% over the same period last year.  The price per barrel of oil has dropped from a high of $147/bbl to about $56/bbl today, or a decrease of 62%.

Something doesn’t quite add up here.  Perhaps it has something to do with the less than transparent oil hedge fund speculation.  In fact, the hedge funds came to light last summer, when congress considered banning the practice, but choose not to.  So what is a hedge fund?

That is an investment that is betting on the price of some comodity will go up.  The idea is to buy low, sell high.  With oil, that was a pretty safe bet until recently.  Some hedge funds completely collapsed, leaving investors holding the bag.

As oil prices began to fall toward the middle of July, these funds began to dump there crude holdings, thus, the market became very soft for crude which lead to the price collapse.  So, was the the end of high oil/gas prices?

No, most experts agree that oil prices will go back up, even before the economy begins to recover.  Indeed, OPEC has already cut production once to prop up prices.  That effort was ineffective, so no doubt they will try again at their next meeting.

In the grand scheme of life, spending money, especially large amounts of hard earned cash, is always somewhat difficult.  The exact perfect time to invest in a renewable energy system may never arrive.  After all, there are many other things to spend money on, a new car, a new bathroom or kitchen, that trip the the Bahamas that you always wanted to take.  However, wouldn’t it be nice to know that you are not being manipulated out of your money by wealthy hedge fund operators?  Wouldn’t it be nice to know that you are not dependent on buying oil from people who don’t like us?  Wouldn’t it be nice to know that you have lessend your impact on the environment, even if it did cost a little more in the short run?

In the coming months, we may be called upon to sacrifice for the good of our country.  The time has never been better to install a renewable energy system, what better way to support the local economy, create jobs, reduce imports, reduce the trade deficite, improve the environment and take back control of your life.

Related posts:

  1. Cheap oil=Less solar?
  2. The Truth about Offshore Oil Drilling
  3. Nice try big guy
  4. The power of Manure
  5. National Grid petitions to Raise Electrical Rates by 21.7 percent

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19 Nov 08 | Conservation, Environment | Comments (5)

Home Energy Assistance Program (HEAP)

18 Nov 08 | Commentary, Conservation, Environment

Most HEAP (programs) are designed purchase heating fuel for those who can’t afford to buy it on their own.

To this, we should all say “Thanks, but no thanks.”

On the surface, it seems like a really good idea. After all, nobody wants to decide between heating and eating.  No reasonable person would want to see somebody freezing to death. Low income families who can least afford to invest in energy conservation are particularly dependent on HEAP.  This situation just perpetuates the cycle.  Many low income families are renters, they cannot afford to do energy saving improvements to the dwelling that they occupy.  Since the land lord is not incurring the utility expenses, there is little incentive for them to take any action.

HEAP should be geared toward energy efficiency improvements, not just paying for oil, electric, or gas.  Land lords need to be encouraged to retrofit older buildings with energy efficient windows and doors, adding insulation, installing energy efficient lighting and heating equipment.  There are millions of old buildings in the US that could use upgrades, the completion of which would save enormous amounts of energy annually.  Those types of improvements will net the biggest bang for a buck.  Instead of buying oil for one season, the HEAP money will improve the conditions inside the building for as long as it is standing.

It is really nice to see the fancy new Zero Energy houses, that is the future.  At the same time, existing structures are, more than likely, not going to be replaced any time soon.  Most older structures can be made reasonably energy efficient at some expense.  This is a quick list of energy saving items that will quickly pay for themselves:

  1. Perhaps the easiest thing to do is to add blown in cellulose insulation to the attic.  The material for a 1500 Square Foot attic (to R-49) costs about $850.00.  Installation varies, but it should not be more than $4-500.
  2. Caulking, weather stripping and sealing.  Easy to do, should cost about $1-200 tops.
  3. Adding blown in cellulose insulation to walls.  More difficult than attic insulating as often access holes need to be drilled in the walls.  Material costs depend on the size of the house.  Total job costs between $4-7,000.  Also, if the house was previously insulated with blown in cellulose, the insulation has a tenancy to settle, so it may need to be “topped off”
  4. Replacement doors and windows.  Depending on the number and size of the windows and doors, can range from $4-15,000.
  5. Replacement of older furnaces and boilers.  Most furnaces over 20 years old are inefficient by today’s standards.  Replacement can save quite a bit of money on heating fuel costs.  Usually between $3-6,000 depending on size and make of new equipment.
  6. Installation of energy saving devices such as programmable thermostats, out door temperature resets for boilers, temperature controlled steam vents for steam radiators, etc.  These costs vary, but often the device will pay for itself within a year or two.

In addition to the tenants saving money on heating, the property owner will increase the value of the rental property by having a more energy efficient building.  In short, these energy saving upgrades will be a much wiser investment than simply buying oil.

Related posts:

  1. National Grid petitions to Raise Electrical Rates by 21.7 percent
  2. Renewable energy as an investment
  3. Waste not want not; The coming new energy age.
  4. Five Good Reasons to Install a Solar Energy System
  5. Radiant floor heating

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18 Nov 08 | Commentary, Conservation, Environment | Comments (2)

Research&Development of Solar Selective Coatings Pays Off

07 Nov 08 | General, Solar Electric

From just up the road a short distance, researchers at RPI (Rensselaer Polytechnic Institute) have discovered a process that greatly increases the absorption of sunlight by photovoltaic panels and allows those panels to use the entire solar spectrum from nearly any incident angle.

“To get maximum efficiency when converting solar power into electricity, you want a solar panel that can absorb nearly every single photon of light, regardless of the sun’s position in the sky,” said Shawn-Yu Lin, professor of physics at Rensselaer and a member of the university’s Future Chips Constellation, who led the research project. “Our new antireflective coating makes this possible.”

It is possible by using nano technology to create seven layers nano rods.  Each layer is designed to transmit a specific wave length (color) of light.  The result is an absorption efficiency of greater than 96%.  This is indeed great news for PV cell producers, as the current light absorption efficiency is about 67 percent for the typical PV panel.

The seven layers, each with a height of 50 nanometers to 100 nanometers, are made up of silicon dioxide and titanium dioxide nanorods positioned at an oblique angle - each layer looks and functions similar to a dense forest where sunlight is ‘captured’ between the trees.

The major implication for solar manufactures is smaller more powerful PV cells can be produced with less raw material.  Is this the breakthrough the solar industry has been waiting for?  Maybe.  In any case, it certainly seems like a step in the right direction.

The one problem I see with all of this is the efficiency of the photovoltaic cell itself.  A PV cell is essentially a large exposed transistor.  When a photon strikes a P-N junction, one of four things happens; it bounces off, it passes through to the other side, it gets converted to heat, or it knocks an electron free.  Of course the first situation is mostly cured by the selective coating.  The last situation is the desired outcome.  Conversion to heat remains a problem.

Currently manufactured PV cell technology has roughly a 15% efficiency from insolation rate to electricity production.  As we learned above, some of this efficiency loss is due to reflection of light from the surface of the PV cell.  A comparison of the total light reaching the PN junction (67% of the available sunlight) compared to the output of the PV cell, shows that the actual conversion efficiency of the PN junction is about 22%.  The remainder either passes through the PV cell substrate or generates heat.  The selective coating applied to a PV cell will increase the heat in the PN juction by 25-30%.

Heat is a major problem to semiconductors.  Heat reduces efficiency and lifespan of a traditional silicone based PV cell.  The computer industry has gone to great lengths to improve the heat tolerances of the semiconductors used in computer chips, therefore, this is not an insurmountable problem.  It does, however, need to be addressed in cells that will use the selective coating developed at RPI.

It will likely take several years for this technology to make it onto the general market.  In the mean time, every watt of installed PV is one less watt generated by fossil fuels.

Related posts:

  1. Solar Energy Consortium, Kingston NY
  2. Photovoltaic manufacturing starts in Kingston, NY

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07 Nov 08 | General, Solar Electric | Comments (0)

Five Good Reasons to Install a Solar Energy System

02 Nov 08 | Conservation, Environment, Solar Electric, Solar Hot Water, solar thermal

A friend of mine has a blog called “Today’s Green Construction.“  Todd is a principle engineer for a large construction company and when it comes to construction, he knows what he is talking about.  Recently, he wrote an article called “OPEC is the Best Reason to go Green,” which I thoroughly agree with.  That got me thinking about other reasons to go green and more specifically, to install solar systems.

So here they are, Five (really) good reasons to install a solar energy system:

  1. Energy independence.  No two ways about it, solar systems save energy.  If you heat your hot water with oil, propane, natural gas or electricity, you are almost certainly using fossil fuels.  Some percentage of that is likely to come from imports originating in countries that don’t like us, except for our money.  These countries include Saudi Arabia, Iran, Venezuela, and Russia.  The less energy we use from those source, the less petro dollars that will have to use against us.  My last customer stated “Every dollar that I don’t send to the middle east makes me happy.”  Amen, brother.
  2. Cost savings.  Saving energy means saving money.  With fuel prices rising, all energy costs are going up, even domestically produced natural gas.  Solar systems will pay for themselves many times over during their operating lifetime.  By installing solar equipment, expenses are fixed at their current levels, so as inflation and other economic pressures cause prices to go up, a homeowner that has solar installed will be paying the same price as before.  Remember when gas was $1.00 per gallon?
  3. Environment.  Saving energy also means reducing emissions.  This varies from fuel to fuel, but almost all fossil produce sulfur dioxide and nitric oxides, additionally, carbon monoxide, carbon dioxide, volatile organic compounds VOC’s and toxic metals can also be released into the atmosphere.  Reducing energy also means reduction in energy used to extract energy being used.  The fuel oil delivery truck uses diesel to bring the fuel to a building, that is energy used to supply energy.
  4. Green Jobs.  The more demand for solar (and other green) equipment, the more jobs will be created right here in the United States.  As a solar contractor, I only purchase equipment that is manufactured here.  Last summer, when my normal supply of solar thermal panels dried up, I could have purchased panels made in Israel.  I opted to wait for the US panels, even though it meant loosing business.  Not that I don’t like Israel, I just thought that there was a lot of transportation overhead involved with shipping a panel from half way around the world, and I would rather support the company making products that I know here in the US.
  5. The future.  The earth has a finite amount of oil and other fossil fuels.  Some of those fuel, like natural gas (which is mostly methane) does regenerate, but in much smaller amounts through landfills and large manure digesters.  Others, like oil and coal, do not replenish themselves.  Most geologists agree that we are approaching or have passed the peak oil point, which is the point where oil extraction begins to drop off as resources are depleted.  In order to maintain the society that we and our forefathers have built, a replacement energy system needs to be implemented, else we will find ourselves in a new dark age.  Some predictions are dire, but that does not have to come to pass.

These reason also apply to wind power, geothermal, tidal, and all other renewable energy sources.  Renewable energy is no longer alternative energy, it must grow into our primary energy source.

Related posts:

  1. Renewable Energy Business viability
  2. Is the Solar Energy field recession proof?
  3. Home Energy Assistance Program (HEAP)
  4. Cheap oil=Less solar?
  5. Membership in Solar Energy International

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02 Nov 08 | Conservation, Environment, Solar Electric, Solar Hot Water, solar thermal | Comment (1)