Re: Solar boats and rickshaws a big hit
From: habshi (habshi_at_anony.com)
Date: 02/07/05
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Date: Mon, 07 Feb 2005 00:08:26 GMT
Type in solar rickshaw in google in images and you can see it
About the expedition
James Moss and his team are travelling across India in a solar powered
rickshaw. Watch his adventure and see his progress from his start
point in Delhi to his final destination in Udipaur.
In the early hours of the morning the family got up and went to see
some of the amazing sites of Delhi. They were incredible. We first
went to see a Jane temple. This was very interesting. To enter the
temple you had to remove your shoes and clean your hands. When we were
inside the temple most of it was not inside. It was open with an
enormous statue on the roof. The statue was of the God Jain Dharma,
which is one of their Gods.
After this we visited the tallest tower in Delhi. It was amazing.
Because of its size a lot of the tower had to be knocked down for the
aeroplanes because of its closeness to Delhi airport.
Next we returned to the hotel where we met Gulshan Capur who has
helped massively on the Indian side of the whole thing. He took us to
his workshop where the vehicle was after being taken out of the IIT
because it was shut on the holiday.
high view of rickshaw
We drove it up and down out side the road of the industrial estate. We
were all very excited about the idea of seeing the vehicle as we have
not seen it since it left England 2 months ago. We arrived and were
not disappointed when we saw the vehicle. It was going a lot faster
than we had expected and was great fun to drive. We have decided that
we will leave from Delhi on the early morning of the 5th. We will then
travel by truck to Jipur then put the buggy on the road and travel to
Udaipur via Kumblegar
for further information please contact:
Gordon Foat for general enquiries enquiries on 07771 895429, or by fax
01483 598804 or email gfoat@futureenergies.com
Raymundo came to the Big Green Gathering armed with an array of twelve
115 Watt solar panels (Solar Fabrik), effectively providing just over
1300 Watt (1.3 kiloWatt) of power during full sunlight. This amount of
power at 12 volts needs very careful handling and regulation. All the
cables and connections used need to be adequately rated, as at 12
volts 1kiloWatt equates to a current of just over 100 Amperes. Also
mounted on a 4 metre pole above the Raymundo vehicle an Air 403 wind
generator was rigged. This wind generator is capable of providing 400
Watts in strong wind and features an internal regulator and protection
against wind speeds which are too excessive. The wind generator
required guy wire stays fixed in four directions for safety.
The solar current thus generated was fed via a regulator into a bank
of 22 deep cycle 110 AmpereHour batteries. By rough calculation, this
bank of batteries when fully charged could power the 200 Watts of our
core network for around 77 hours continuously. This situation would
only occur if there was no wind or Sun for nearly 4 days, which was
highly unlikely where we were, high on the Mendip hills; although it
did rain an awful lot, which wasn't too helpful. Just in case, they
had another backup bank of batteries half the size, all charged on
wind and solar energy.
Running off the battery bank Raymundo have a 2.6 kiloWatt Trace
inverter (SW2612E), installed into the vehicle, which converts the 12
Volts dc (direct current) into 240 Volts ac (alternating current) for
powering ordinary UK household equipment. The 240 Volts ac was then
distributed to us and those around us needing power.
Once we have consulted the Raymundo crew, we will post circuit
diagrams here. Refer here for Air 403 wind generator wiring.
Earthing
Before turning on the inverter, the negative terminal of the
batteries, the earth outlet on the inverter and the chassis of the
vehicle are all connected together and then connected to a good copper
earth spike hammered deep into the ground. This ensures that they are
all at the same potential. The neutral outlet on the inverter is then
connected to the earth at the outlet of the inverter. The 240 Volts ac
is then fed through an RCD (Residual Current Device) rated at 30ms,
and an MCB (Miniature Circuit Breaker) rated at 15 Amps. This makes it
safe for use in a field.
The results
The iTrike worked very well indeed and we were able to provide mobile
Internet access over a large area of the festival site. We rarely lost
the connexion between the base-stations, and when we did, this was
largely due to passing too close behind a large obstruction, such as a
truck or marquee. So long as we stayed a safe distance of around 10
meters from anything large in between the wireless devices, we had a
good connexion. Mostly we were able to achieve the maximum speed for
802.11b networks of 11Mb/s , dropping to 5Mb/s on occasion. This was
no cause for concern
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