Off-grid living for low EMF; zonnepanelen, windenergie, e.d.
woensdag, 07 maart 2018 - Categorie: Artikelen
Een aantal interessante verhalen, onder meer de volgende titels en één van de verhalen:
Moving Off-grid for Low EMF — An Overview PDF
How to go Off-Grid Fast and Simple PDF
Living on 12 volt Solar — Part 1 (Introduction) PDF
Living on 12 volt Solar — Part 2 (Electrical System) PDF
Living on 12 volt Solar — Part 3 (Appliances) PDF
Living on 12 volt Solar — Part 4 (Misc. Info) PDF
Questions and Answers about Low-Voltage Off-Grid Living PDF
Managing a 12 volt Solar System PDF
Low EMF Solar Charge Control Using a Voltage-controlled Switch PDF
Choosing and Using a Generator PDF
Protecting LED Lights from Overheating PDF
How to Wash Clothes Without Electricity PDF
Zero-fume Gas Stove Enclosure PDF
Cooking Without Electricity PDF
Desert Moon House: A Super-Low EMF Solar Electric System PDF
No Electricity in the House PDF
Life in a Less-Toxic Off-Grid Travel Trailer PDF
Going Off-grid Safely on 48 Volt (external link)
Disconnecting an Existing House from the Grid PDF
Solar Energy Can Be a Health Hazard
Keywords: solar power, wind power, inverters, dirty electricity
Generating electricity from the sun and the wind is gaining popularity. In many
parts of the world, governments encourage their citizens, businesses and schools to
put solar panels on their roofs, and wind farms are sprouting up in many places.
Some of these technologies are unfortunately a health hazard to people who have
electromagnetic hypersensitivity (EHS). These are people who get sick from
electromagnetic radiation in very small amounts, such as that which comes from
cell phones, computers and other electronic appliances.
There are studies that suggest that radiation of the type coming from solar electric
systems (some of which have been dubbed “dirty electricity”) may have long-term
health effects on healthy people as well, and may cause hyperactivity (ADHD) in
school children. In the following, we will look at the problems with solar and
wind generators, and how one can use them without compromising health.
Putting solar panels on the roof of one’s home, business or school is a good way to
provide an alternative to polluting conventional power plants. However, people
with electromagnetic hypersensitivity may not even be able to enter or be around
such a building. Since some of the milder symptoms of this syndrome are
common and non-specific, such as headaches and restlessness, a person using the
building may not even know his or her symptoms are caused by the solar system.
Modern solar systems use components that radiate radio frequency
electromagnetic radiation, which can cause the symptoms. The main problem is
the inverter, which is a device that takes the electricity from the solar panels and
turns it into alternating current (AC) and puts it out on the electrical grid. The
inverter generates radio frequency radiation. The wires connected to the inverter
act as antennas, so the radiation may be picked up hundreds of feet away from the
inverter. There have been cases where a solar-electric system became a problem
for an electrically sensitive person living next door.
There may be other troublesome components in a solar system as well, especially
in systems that use batteries. These systems may use the batteries to power the
building during a power outage, though in most cases they are used when the
house is in a remote rural area where there is no electrical service.
Today’s battery systems usually use technologies that are more efficient at
charging the batteries, but which also emit radio-frequency radiation. These
technologies are called Pulse-Width-Modulation (PWM), Maximum Power Point
Tracking (MPPT) and other names.
It is easy to demonstrate that the solar system generates dirty electricity. One
method is to take a simple AM radio, set the dial at the lowest frequency and hold
the radio near the solar panels or wires. A lot of static and buzzing should be
heard, which goes away when taking the radio well away from the building.
Another method is to buy a Stetzer meter and plug it into any outlet fed by the
solar system. The instrument will probably go off the scale.
It is possible to use solar-electric systems without this radiation, but they are not
suitable for most people. One will have to do like the off-grid pioneers did in the
1970s and 1980s, using 12 volt DC electricity with no inverter, and just a simple
charge controller. There are people doing it (including this author), but it is a
significant lifestyle change. Hopefully future generations of inverter design will
be better, though it will be very difficult to fully remove this radiation.
For ultra-low EMF solar systems, see www.eiwellspring.org/offgrid.html
Harvesting electricity from the wind is typically only practical for people living in
rural areas. A wind system takes up a lot of space and requires more maintenance
than a solar system. They are also noisy, which can be bothersome to sensitive
people. A few models can be mounted on a house, which is a very bad idea as it
will then magnify the vibrational noise.
Almost all residential-size windmills use an inverter to produce AC electricity. If
connected directly to the grid and placed far from the house (a minimum of 100
yards) it may be okay for an electrically sensitive person, but this has not been
tested. Even if the wind generator is placed far from the house, it could be a
problem if it is connected to the house wiring, as the wire will act as an antenna
for the inverter.
For remote houses with DC battery systems, it may be doable, but there are a
series of untested issues regarding radiation from rectifiers, voltage regulators and
transformers. This author is not aware of any EHS person who has tried it.
Wind farms are very different from residential-size wind generators. Their blades
rotate much slower, so they do not appear as noisy, but they can put out a lot of inaudible vibrations (infrasound), which makes a few people sick. People with
EHS appear to be particularly susceptible.
Big wind turbines almost all use a very big inverter, which can pump a lot of dirty
electricity onto the local grid and into the soil as ground currents.
People with hypersensitivities should probably not live closer than a mile (1.6 km)
from large wind turbines.
Solar hot water systems
A solar hot water system takes the heat of the sun and warms up bath water and
sometimes even heats up a house. These systems usually have a solar collector on
the roof that heats up a liquid, which is then pumped to a storage tank for later use.
The main issue with these systems is the pump, which can be a problem for people
who are electrically sensitive. It is a small pump, and may be no more bothersome
than a refrigerator. If placed in a separate building or in a corner of a larger home,
it may be just fine. Some systems have the pump run on DC electricity directly
from a solar panel, which is not an improvement to using a regular AC pump.
Some poplar DC pumps are actually worse.
It may be possible to get solar heated water without any electricity at all. These
systems are called “thermosiphon” types, and use a storage tank mounted on the
roof, with a solar collector placed below the tank. These systems are especially
popular in third-world countries and Australia, but are best suited for climates with
only mild frosts.
What to do?
It is not easy being green and sensitive. Many “green” technologies are not safe
for people who are chemically or electrically sensitive. Some examples beyond
this article are hybrid cars and most low-energy light bulbs. So what is a greenminded
sensitive person to do? Fortunately, there are safe options, which are
simple and with no up-front investments.
Some electrical utilities are investing in large solar plants and wind farms, even in
states that traditionally have not been friendly towards the environment. Some of
these utilities may offer their customers their green electricity at a premium price,
to support the construction of more solar and wind plants. In some states, there is
no longer a monopoly on selling electricity, and there are now companies offering
electricity generated with renewable energy.
In areas where there is no choice, one could still purchase solar credits from
nationwide vendors. They will generate the electricity from a plant somewhere in
the country – it doesn’t really matter where it is anyway. Just beware that some of
these vendors are unscrupulously selling electricity from existing plants, especially
using hydro power, so the premium does not go to any new solar or wind plants,
but directly into their pockets.
Of course, buying green electricity from the power grid does not give one the
same bragging rights as a roof filled with solar panels, but it all helps just the
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