Important :
This section addresses home use only with small installation of less than 1 kW.
to collect wind power you need to have wind at sufficient speed .with Motorwind power generation starts with 2 m/s wind speed but it starts to be economically viable for winds of at least 4m/s if you are concerned by pay back time .
Motorwind technology only transform into electricity the wind energy available on the site .
choose a Motorwind setting with a power always lower than your daily need because you must use all the electricity produced .
you can save it for few hours but not for weeks.
the electricity production is only for home usage and does not have the regulators necessary to make the Motorwind and grid frequencies compatible .
you do not have to get approval from power company to use Motorwind .
you can share the power produced with other homes if you wish only by using your own electric cables .
If you need to interconnect to the grid you can use existing tie grid inverters(like sunny boy)
A tie grid inverter is only interesting for large systems because of the large number of batteries needed otherwise.
How to calculate .
the unit used by power company is the kWh = 1 unit .
for an output of 50 watts during 24 hours the energy collected will be : 50 x 24 = 1200 watt /hour = 1.2 kW/h
for an output of 50 watts during 16 hours the energy collected will be : 50 x 16 = 800 watt/hour = 0.8 kWh
if you have stored in a battery 1.2 kWh it means that you can light up a light bulb of 20 watts during 60 hours
or a fridge or TV set for 24 hours
or a 100 watt light bulb for 12 hours
or a 600 watts heater for about 2 hours .
if you have a 12 Volts battery that can deliver 90 amperes hour it means that the energy stored is : 90 amp x 12 volts = 1080 watts/h = 1.08 kWh
if you connect in parallel 2 x 90 amp batteries the energy stored will be : 1.08 kWh X 2 = 2.16 kWh |
WHY USE MOTORWIND
conventional wind turbines are designed for large electricity production and therefore occupy large areas of land and can only operate in places where the wind speed is in average 10m/s .conventional wind turbines can only operate for winds between 10m/s and 25 m/s .
Motorwind has been designed to operate with low wind speed (above 2 m/s) and be installable anywhere due to the modularity .
the size of Motorwind can be adapted to the available space and the energy required .the design simplicity and components used make the installation and maintenance very easy for anyone .the simplicity allows very low manufacturing costs and therefore very low retail price .by using different shapes Motorwind can adapt to the environment . |
Questions you need to ask yourself to decide what type of installation you need
A) why do i want to install a Motorwind ?
because i want to do my share in reducing global warming
because i am not connected to any grid and therefore have no choice
because in my area there is so much wind that it is pity not to collect that energy
because i want to be energy independent
because i can save money
B) what is my consumption.
if my monthly bill is about 50 kWh (approx 6 US$ or 50 HK$ or 5 euro ) that means my daily need is approx 1.5 kWh .
i need approx 4 square meter of turbines (80 turbines = 4 x 20 turbines sets item B ) if the wind average is about 4m/s
i need approx 1.5 square meter of turbine (30 turbines = 2 sets of item B ) if the wind is about 5 to 6 m/s
i need approx 0.4 square meter of turbine (1 set of 8 turbines item A ) if the wind is about 10m/s
if my monthly bill is about 250 kWh(approx 30 US$ or 250 HK$ or 25 euro ) that means my daily need is approx 8 kWh .
i need 5 times more than the above .
C)what is my peak consumption
you can calculate by adding each appliances power but the easier will be to read your meter at 1 hour hour time difference during your peak hour .
this will decide the DC/AC converter power needed .
if for example you want to use Motorwind to keep a light on 24 hours a day (watch tower or surveillance camera for example ) then a 150-300 watt (item D) will be enough .
if you want to power only the lights in the house with a peak hour of 1 kW then you need 1 set of 0.8 - 1.2 kW dc/ac inverter(item E) .
if you want to power everything with a peak hour at 4 kW then you need a 4 sets of 0.8 - 1.2 kW dc/ac converter(item E)
D) what is the wind speed in average ?
between 0 and 2 m/s :
between 2 and 4 m/s :
between 4 and 6 m/s :
between 6 and 10 m/s :
more than 10 m/s :
How to measure the wind speed ?.
if you do not have a wind speed tester an easy and cheap way to measure it is :
take a piece of cardboard (carton) about 30 cm X 15 cm . stick a coin of 1 HK$ or quarter US$ with tape on the bottom.
hold gently the top side and face the wind .if the bottom of the cardboard move up making an angle of about 30 degrees then the wind is about 2.5 m/s
if the angle is about 45 degrees then the wind is about 4.5 m/s
if the angle is 80 to 90 degrees then the wind is about 6.5 m/s and above
please note in the same time the wind direction .you will need it to install Motorwind in the right direction. |
