MAKING ELECTRICITY
Living in a city we just plugged into the socket on the wall. I
think I took electricity for granted, sure we got a power bill
every now and then but I never worried about where it came from.
Sailing around the world I was conscious of electricity but after
all I was on a yacht. In our little "Gadget Hut" (We have given our
survival hut this nickname because "Gadget" was a favorite husky
dog with Mawson's men) we need electricity for lights, the radio,
the CD player, the tape player, the telephone, the computer and the
microwave. Generating electricity requires a source of energy. We
can use the wind, the sun or fossil fuel as energy sources. We have
equipment with us to use all three sources. Right now because it is
still light for a good portion of the day we are using solar
energy. We have Solarex panels on the side of our hut. The sun
shines on them and they convert energy of the sun to electricity
which is stored in batteries so we can use it when we need it.
TECHNICAL DETAILS OF SOLAR PANELS
If you are studying solar energy then these details may be of
interest to you. I have two Solarex MSX-77 panels. They are 77 watt
modules and have dual voltage capability. 36 semicrystalline solar
cells are arranged in two 18 cell strings. Combined in series,
these strings produce 12 volts. The strings terminate in a junction
box and can be reconfigured in parallel, or on- site, to produce a
6 volt output. This arrangement also allows bypass diodes to be
placed every 18 cells (2 per module) improving reliability and
performance in higher voltage (24V and above) systems. This is the
latest technology in polycrystalline silicon photovoltaics and the
largest solar cells in commercial production. They also have the
highest power and charging current (4.56 amps) of any 36 cell PV
module on the market today. The Solarex company claims they have
had no failures reported since the first module was delivered in
1987. That was a big reason why I chose to take them to
Antarctica.
TECHNICAL DETAILS OF BATTERIES
I have three "dryfit Sport-Line" 90amp hour, 12 volt gel batteries.
I used this brand of batteries on my yacht, "Buttercup" when I
sailed single-handed around the world. They were great so I chose
them for Expedition Ice-Bound. They are completely sealed and can
work even in extreme situations like being upside down when
"Buttercup" rolled degrees in the Southern Ocean near Cape Horn.
"Dryfit Sport-Line" is the first sealed battery that uses the
Sonnenschein technology of immobilised gel electrolyte. I like them
because they can't leak acid and don't have to be filled with water
from time to time. That could be a real problem down here.
THE RADIO AND THE MICROWAVE
The big excitement this week was hooking up our radio receiver. We
really brought it along as an emergency transmitter but we thought
it might be fun to get some news of the world. From about 11 p.m.
until 4 a.m. it is sort of dark. The moon's out and we can see the
stars. The night allows radio signals to reach areas far greater
than what they can in the daytime. We heard stations in Sydney,
Melbourne and Auckland, New Zealand. The New Zealand station was a
talk-back show. It was just after midnight and the presenter gave
his telephone number on air. I turned on the electricity and picked
up my COMSAT phone in a briefcase (an Inmarsat M communications
system) and gave him a call. At first he thought we were joking
about being in Antarctica but eventually we convinced him that we
were serious. He was quite impressed to have a live via satellite
call from the windiest place on earth. We told him all about
Telecom New Zealand and how they are bringing news of our adventure
to New Zealand schools. The microwave sounds like a modern luxury
for two people living in a survival hut but when you consider how
much fuel you use in cooking every day, especially baking bread you
can see why it makes sense. We get the sun's energy to make
electricity. The heavy, bulky liquid fossil fuel which we had to
transport from Australia we are saving for when there is no
sunshine. Using the microwave is quick, it uses sunshine and
there's no pollution. Before we left Sydney we figured out the
amount of fuel we would need to cook every day and compared it to
using the microwave for a good part of our cooking. We still have a
kerosene stove like I had on my yacht and we do use it but we
really like the microwave.
WINTER AND THE CHANGES
We had another blizzard. For eight days we were stuck inside
"Gadget Hut" with temperatures outside around -18 Celsius and 75
knots of wind. The visibility at times was only a few metres with
drifting snow. We were getting low on water and decided to try and
get out to the lake were we have been collecting water. The wind
got down to 50 knots and the wind chill was -40 so tried it and we
were able to get a bit of water. We did it as a training run more
than anything else and we learned quite a lot. Mostly we learned
that we'll only be able to get water from the lake for another week
or two. Yesterday when the sun was shining we went back to the
lake. The ice is now about 45 centimetres thick and I had to use a
big mattock instead of the ice axe that I had been using to chop
down through it. Today is the mildest it has been in almost two
weeks. It was -8 Celsius outside when we woke up today. If you want
to know what it's like in "Gadget Hut" look inside your freezer at
home (unless you have a frost-free type). See how the frost extends
out from the walls of the freezer--well everywhere there is
aluminium inside our hut looks like that. The frost is almost 3
centimetres thick. The frost is even growing on the carpet we put
near the bunk to insulate us from the frost. We are starting to get
worried about what it is going to be like in winter when the
temperature gets to -31 Celsius. We ripped all the carpet down and
we've lined the inside all around our bunk with timber and
high-density foam. We did that two days ago and it seems to be
working.
ANOTHER WINTER WORRY
There is moisture under our mattress and we couldn't work out where
it was coming from. We thought it might have been dampness from the
trip down on "Spirit of Sydney." We took the mattress outside, took
the cover off it and tried to dry it. The very next morning the
moisture was back. We think its condensation from our bodies going
down through the mattress. We are wondering what is going to happen
during the winter.
SEALS ARE ARRIVING, THE PENGUINS ARE LEAVING
When we arrived in January there were lots and lots of penguins
down here, Adelie penguins. One penguin stayed near our hut for a
few days when we first put it up but he eventually found a friend.
They joined the rest of the penguin colony. Most of them have gone
now but there are still a few around. Margie and I are a little
concerned about three penguins who seem to be moulting. They hide
behind some rocks about five metres from our hut. Every day they
seem to lose more and more feathers. We're not sure what's
happening to these three. You'd think that they would have finished
moulting when all the others did. I'll keep you informed. There
were a few seals here when we came but now there are about 115
seals in Boat Harbour. They are all Weddell Seals which are large
seals up to about 3 metres and 500 kilograms. They just lounge
around on the ice of Boat Harbour. We go over and have a look at
them every day we can get out. A lot of them have wounds and look
like they've been fighting. Their mouths are bleeding too. We've
seen then chomping on the ice.
THANKS FOR ALL THE E-MAIL
I haven't got enough electricity to answer all of you individually
but I'll use this journal to answer as many questions as I can. I
hope that you send e-mail back and forth between schools and make
this Antarctic adventure something we all share. I'd like to say
that I'm amazed that schools from North Rockhampton, Geelong, Hill
End and Alice Springs School of the Air and reading ICEJOURNAL.
Keep those electronic postcards coming. Miranda Public School asked
some questions about electricity that I hope I've answered this
week. Several schools including Clovelly Primary, Woolooware and
Millthorpe asked about where we store our "waste." HERE IS THE
ANSWER TO THIS POPULAR QUESTION. We have black plastic drums that
are made for industrial hazardous waste. We have two of them in the
small room that I mentioned a few weeks ago when I wrote about
taking a shower (see ALONE WITH THE PENGUINS, Taking a bath). There
is a board in the annex at sitting down height with two holes in
it, one is labelled "pee" and the other "poo." Beneath each hole is
a black drum. The The penguins and seals don't take such care of
the environment but we are the visitors and we care about their
environment. We will take all the drums of solid waste back to
Australia. The liquid waste will be put in the sea. The Antarctic
treaty permits both types of waste to be put in the sea but we
wouldn't want to do that. Our Antarctic bases don't do it either.
If you ask a question and I don't answer it directly it may be
because I've answered it in this journal or in a previous one. Or
maybe the question is too hard and I don't know the answer yet. One
school asked what I'm going to feel like when it's dark for ten
weeks during the winter. The answer is....coming in the winter when
I actually live through that darkness. Right now I'd just be
guessing. I've read many books about explorers who lived in
isolation. I wanted to experience it myself. I'll let you in on all
the secrets. Keep reading ICEJOURNAL. Oh, I want to tell you about
Mary Ann. She works in my office in Sydney. I've asked her to type
up a list of my e-mail postcards and put them on ICEBOUND.BB so you
can all see the schools and their electronic addresses. I'll get
her to include PowerNet Keylink, Nexus and New Zealand schools.
Soon we should be adding Japan and the United States to our e-mail
ICEBOUND club.
Keep warm,
Don
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