Welcome to this months issue of "DC supply".
month we look at free power and how for a reasonable cost, we can
electrical supplies in an environmentally friendly manner and keep those
bills to a minimum if not eradicate them altogether.
and solar energy are rapidly becoming more popular with the advances in
and solar panels. Indeed if properly utilised, it is perfectly feasible to
entire house using one or a combination of these two elements.
is no doubt that electrical energy now has a more promising future in
too. Recent reports suggest that a new vehicle being developed in the far
can reach speeds in excess of 120km per hour and last for approx 300km on
Charge a vehicle of this nature with solar power and wind generators
and the fuel
could run into thousands of dollars per year.
look at our two feature articles for an examination and practical solutions
electrical power generation from two of the most prolific and FREE
the wind and sun.
you enjoy this months publication and would like to take the opportunity to
you all a very happy Christmas and a prosperous new year. We hope you have
our content this year and look forward to helping you get the best from
supplies in 2002.
Editor: Alan Fidler.
Alan is the owner and manager of CBC Design, a leading battery management
company based in the UK. He has worked in the industry for over seventeen
years and has designed charging equipment and battery monitors for some of
the world largest companies.
ARTICLE: Free Power Sources. Author: Alan Fidler.
know how many of you have looked at your electricity bills and
how nice it would be not to have to pay them, I know I have. So is
practical way of generating enough electrical energy to run an entire house
become of thing of the past?.
reality it is practical albeit expensive to begin with in some cases. There
of difficulties to overcome as well as planning and building regulations to
before one can even begin looking at the actual installation. You may
permission from your local authority to install masts and turbines.
off, how will we generate enough energy to run those appliances we all
upon and how can the excess be stored so it can be re-used as and
first thing to do is to decide what we use as our primary power source.
include wind and solar primarily. In some countries, solar energy
more abundant that wind energy whilst in others the opposite may be so.
how much of each is available is the first consideration then.
have decided upon our primary power source which will be one of the
or a combination of the two, we need to measure our daily electrical energy
so we can calculate how much energy we need to generate.
notes over the course of a week or two on every electrical appliance used
how long. This will help build an accurate consumption record.
next course of action is to contact a local company who supply wind
products and cost the installation as a whole. Get as much advice as
from them along with a detailed specification for the solar panels and
generators. They should be willing to help you design an efficient design
harnesses as much power as you require, subject to budgetary restraints
local planning restrictions.
absence of wind and sun your electrical supplies will be derived from
that have stored up excess energy generated beforehand. Your
therefore include, solar panels and or wind generators, a
or number of voltage regulators to maintain the batteries in a fully
state when supplies are abundant and inverters to convert your
supplies into the useable AC your appliances require. You may even
a standby-diesel generator for emergency use.
conservation is important too. Use as many energy efficient appliances
can to reduce your daily consumption and remember to turn off items
unoccupied rooms, particularly lights which are regularly ignored.
on an installation of the type mentioned above could run into
dollars but the potential savings over a number of years should outweigh
initial purchase costs by a considerable margin. Of course the
are substantial too not to mention the sheer satisfaction derived from
having to pay those electricity bills.
have the space and the finances required, it is perfectly feasible to
reliable electrical supplies in your own back yard that can meet the
of your entire property. If you have mechanical and electrical skills,
design your own wind generators and install solar arrays yourself
reduce initial costs too.
ever source you decide to use, it is not only possible to generate
own electrical supplies but highly desirable in an age in which fossil
rapidly losing face on a planet suffering from the effects of
*** NEW! 12 and 24V DC 60 Watt lamp dimmers ***
Dims single or
multiple lamp assemblies with a maximum rating of 60 watts!
can be adjusted from a dim glow to bright light!
use reduces battery power consumption and increase lamp life!
Go to http://www.cbcdesign.co.uk/chargers/dimmer.html
and take a look at the
in more detail NOW!.
ARTICLE: Wind Generators. Author: Alan Fidler.
generators are very useful in the right environment. It the UK, there is
generate electricity on most days, if not all year and they are becoming
popular on houseboats and narrow boats to boot.
typical generator includes a propeller connected to a wind turbine that
energy. The electricity generated is then regulated by an appropriate
circuit and stored in batteries or used by connected appliances.
speed is generally limited using a slipping clutch to prevent
failure. The assembly is normal mounted atop a metal pole or mast
fixed to a suitable surface using a bracket and a number of securing
wires. A secure
method is obviously very important if the installation is to withstand
of wind when the propeller speed will of course be at maximum.
are available in a variety of ratings depending upon the application in
are designed to function. Smaller units can supply up to 100 watts of
energy per hour
per day. Larger 1KW, 1.5KW, 5KW or even 10KW units are also available
the cost can be as high as $20,000 dollars for the larger model. A 100W
could cost anything from a few hundred dollars upwards.
yourself versions are also a possibility using simple components
hardware and automotive stores. See http://www.lookout2000.com/windpower
detailed plans on how to construct your own high power wind generator. Self
wind generators have several advantages including ease of maintenance,
manufacturing costs and the sheer pleasure of building your own unit.
course efficiency is an important first step in getting the best from any
you should do as much as you can to reduce your energy costs before
a wind generator of any description.
many energy efficient items as possible and consider fitting sensors to
appliances in unoccupied rooms. Once you have mastered energy conservation
easily calculate how big your generator and battery installation needs to
important to size the installation so that you generate more electricity
if you are to avoid potential problems.
will be days of course when the wind speed is just too low to generate much
of energy but most generators will function in a wind speed of 10mph or
deliver some power to the batteries or loads. Of course, it stands to
generator must not draw power from the batteries at very low speeds so
diodes will be required between the batteries and regulated supply to
detailed description of a typical installation is beyond the scope of this
it has at least opened your mind to the possibilities that wind generators
Realise that a 12V 100A alternator connected to a suitable impellor can
as much as 1200W per hour or 28,800watts per day. That's enough power
the lights in most houses with a little bit to spare for your back-up
several generators at once along with suitable batteries and
inverters and you
be entirely self sufficient and never pay an electricity bill again.
NEW! 12 and 24V DC Low Battery Alarm ***
your vehicle batteries from deep discharge with a low battery alarm.
Easy to Fit, Easy to Use and inexpensive!
Designed to protect batteries in cars, trucks, boats and mobile homes!
Built in warning sounder!
Goto http://www.cbcdesign.co.uk/battalarm.html and
download a data sheet or
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Questions from Ben Crizeman! What does "Float
The output of most mains powered battery chargers is isolated with respect
the output is floating at a specific potential and this is referred to as
voltage. A 12V lead-acid battery is float charged at 13.6VDC @ 20oC.
Question2! Can a floating output be earthed?
In some applications, the output negative must be earthed to meet the
particular specification but specialist knowledge is required to safely
that is designed to be fully isolated from the input supply.
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