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PostPosted: Mon Oct 01, 2007 10:36    Post subject: boring Reply with quote

cant somone start a war or sumthing the forums are very boring at the moment need somthing to talk about.
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APOcalypse
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PostPosted: Tue Oct 02, 2007 06:01    Post subject: Reply with quote

There is nearly noone left who can start a war Wink

What's about 'German soccer girls are World Champion' Laola
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Nikoy
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PostPosted: Tue Oct 02, 2007 06:12    Post subject: Reply with quote

CNN news from yesterday late: A volcano erupted in Yemen - what about if it happens in your "backyard"?
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Pokel
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PostPosted: Tue Oct 02, 2007 09:51    Post subject: Reply with quote

I dont have a volcano in my backyard. Perhaps, in the meantime, someone is building one, but I dont think it is allowed to do so and hiding a volcano is not as easy as it sounds.
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Aurion
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PostPosted: Tue Oct 02, 2007 14:08    Post subject: Reply with quote

I don't think it makes that big difference whether the volcano is in your backyard or in your neighbours.
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Carboneater
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PostPosted: Tue Oct 02, 2007 14:20    Post subject: Reply with quote

Well, Aurion, the main difference is when it is in your backyard, you know you've hidden it there, and you know when it will blow. Your neighbours don't.
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Angron
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PostPosted: Tue Oct 02, 2007 16:22    Post subject: Reply with quote

if i had a volcano in my backyard i would use it to make sure i had a constant supply of hot water, i miss having a shower in the morn before college. stupid electrick meter!
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Neireh
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PostPosted: Wed Oct 03, 2007 06:05    Post subject: Reply with quote

a vulcano in the backyard? imagine the possibillities for making barbeque ^^
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Nikoy
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PostPosted: Wed Oct 03, 2007 08:40    Post subject: Reply with quote

Yeah, they actually do it on the Canary Islands or the Azores I am not sure where exactly...
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alphabravo
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PostPosted: Wed Oct 03, 2007 09:20    Post subject: Reply with quote

it provides about 95% of iceland's electricity as well (or maybe 100%)
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Ancient
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PostPosted: Wed Oct 03, 2007 09:27    Post subject: Reply with quote

into the realms of Geothermal Energy

Geothermal energy is derived from beneath the earth's surface. There are a variety of different thermal resources, each of which creates its own engineering challenge as to the way that the energy can be tapped. In some cases current technologies are not practical or economic for successfully extracting the thermal energy. To all intents and purposes geothermal energies are renewable because the latent quantities of energy are so large we cannot imagine them running out. The environmentally-friendly potential is enormous because, in principle, well designed plants could be cost effective and reliable as well as being clean in terms of emissions. Also they need not produce local environmental visual scarring. Unfortunately the emphasis is on the word 'potential' because much more research and development and capital investment is required to make a wide-scale success of some of these various sources.

Everywhere under the earth's surface there is hot material but it occurs in different forms and at very different depths. Four types of resource are recognised which could be used for substantial amounts of energy transfer and used, for example, to drive electric power stations, in theory at least. A fifth method can be used for smaller applications but, despite the modest energy transfers per installation, this method can be easily engineered and therefore is quite valuable in practice. These five resources are briefly discussed.

The main one, applicable to power generation, is referred to as the hydrothermal reservoir and this has some track record of success. The reservoir is water or steam at a high temperature and the way that the heat exchange is engineered depends on the temperature. It is the fact that the heat carrier (water) is already present (and water is very convenient to handle) which makes this source reasonably accessible. The steam, or hot water flashed to steam, is used to drive turbines to generate electricity.

The other three powerful resources are hot dry rock, geopressure brines and magma (molten rock) and although they have the potential to provide energy the current technologies are not sufficiently developed to make them commercially viable. It does not require much imagination to recognise some of the problems. For example the dry rock must be fractured and liquid forced through the cracks; the geopressurised liquids are rich in methane and exist at great depths; the magma is too hot for conventional processes to be used. It should be possible, eventually, to provide large proportions of our energy requirements using these sources but that state of affairs is a long way off.

The fifth and more modest resource is to extract heat from the ground just under the surface and this is a technique that has been used for ages. It relies on the sun's radiation warming the ground which then behaves as a giant storage medium. Where such heat at low temperatures is available at a shallow depth, a water-circulating scheme with heat pumps can be used to transfer the heat to where it is required. Applications include heating of houses, greenhouses etc but you've got to be lucky to have suitable back garden. As an added feature where heat pumps are used the heat transfer can be used in reverse so providing cooling in summer. This method of heat transfer is not suitable for large scale power generation and since it is dependent on the sun, its applicability is limited in cooler districts. Some installations are available in the UK, although we doubt it would be economical for an individual domestic plot, but may be cost-effective for small community schemes.

The environmental pollution caused by geothermal installations is small because there are few emissions. Visually a geothermal site need not be offensive because of its construction which only requires a small profile and can easily be screened, by trees for example. Nevertheless, there can be a few problems caused by solids produced where salts carried up in the water must be disposed of and there have been cases of subsidence due to the drillings. Perhaps the worst scenario is when magma has unexpectedly found its way to the surface through the drillings. None of these drawbacks are insuperable.

Successful schemes are in operation around the world and some have been continuously productive for about 100 years, although they tend to be located in specific areas. Fairly obviously, location is dependent on the amount of geothermal activity and its depth, something which is related to the earth's plate tectonics. Countries which have taken advantage of geothermal energy include the US, Italy, Germany, Switzerland, Belgium, Portugal, Iceland, Mexico, Canada and New Zealand. There are many more, the International Geothermal Association has more than 60 members [see the link]. Even the UK has three experimental sites in Southampton, Cleethorpes and Penryn although we cannot see geothermal energy becoming a large scale contributor of renewable energy here (wind, water and possibly solar being more likely contenders q.v.). Of the developing countries, maybe half of them have the potential to develop geothermal sites.

In summary, internationally the quantity of geothermal energy is virtually infinite and the environmental benefits are beyond reproach. Set against this are the disadvantages that considerable more Research and Development is needed to take advantage of the buried wealth and even when a commercially viable site is identified the initial investment cost can be a serious deterrent. Maybe if some of the multinationals who have the resources to invest in oil exploration could channel them into geothermal exploration, research and development we might see geothermal energy being tapped on a significant scale.

The first geothermal power station was built at Landrello, in Italy, and the second was at Wairekei in New Zealand. Others are in Iceland, Japan, the Philippines and the United States.

In Iceland, geothermal heat is used to heat houses as well as for generating electricity.

Renewable energy in Iceland has supplied over 70% of Iceland's primary energy needs since 1999[1] — proportionally more than any other country.[2] The remainder of its energy needs are produced from imported oil and coal. Iceland is at the forefront of renewable energy research and plans to become the world's first hydrogen economy, with all of their private automobiles, fishing boats, and public transportation running on hydrogen fuel.[3][4] This would make Iceland the first completely energy-independent country in the world, using 100% renewable energy sources.

Of the 99.9% of Iceland's electricity that is currently generated from renewable sources, 81% is generated from hydroelectric power; virtually all the remainder from geothermal power.[5] Geothermal sources are also used to heat 89%[6] of the households in Iceland, with the remaining being heated with electricity.

Because of the special geological situation in Iceland with the high concentration of volcanoes, geothermal energy is very often used for heating and production of electricity. The energy is so inexpensive that in the wintertime, some pavements in Reykjavík and Akureyri are heated.

In Iceland, there are five major geothermal power plants which produce about 26% (2006) of the country's electricity. In addition, geothermal heating meets the heating and hot water requirements for around 87% of the nation's housing.

In the year 2006, 26.5 % of electricity generation in Iceland came from geothermal energy, 73.4 % from hydro power, and 0.1 % from fossil fuels. [1]

Consumption of primary geothermal energy in 2004 was 79.7 PJ, or 53.4% of the total national consumption of primary energy, 149.1 PJ. The corresponding share for hydro power was 17.2%, petroleum 26.3% and coal 3%.
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Giner
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PostPosted: Wed Oct 03, 2007 13:10    Post subject: Reply with quote

So easy to press ctrl c and ctrl v.
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Nella
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PostPosted: Wed Oct 03, 2007 16:42    Post subject: Reply with quote

yeah in it
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tink
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PostPosted: Thu Oct 04, 2007 08:48    Post subject: Reply with quote

lord_foul. what a wast of time...... sad person
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Ancient
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PostPosted: Thu Oct 04, 2007 09:44    Post subject: Reply with quote

Times have changed, haven't they?....... read on:-)

CONGRATULATIONS TO ALL THE KIDS WHO WERE BORN IN THE

1940's, 50's, 60's and 70's !!

First, we survived being born to mothers who smoked and/or drank while
they carried us.

They took aspirin, ate blue cheese dressing, tuna from a tin, and
didn't get tested for diabetes.

Then after that trauma, our baby cots were covered with bright colored
lead-based paints.

We had no childproof lids on medicine bottles, doors or cabinets and
when we rode our bikes, we had no helmets, not to mention, the risks we
took hitchhiking

As children, we would ride in cars with no seat belts or air bags.

Riding in the back of a van - loose - was always great fun.

We drank water from the garden hosepipe and NOT from a bottle.

We shared one soft drink with four friends, from one bottle and NO ONE
actually died from this.

We ate cakes, white bread and real butter and drank pop with sugar in
it, but we weren't overweight because......

WE WERE ALWAYS OUTSIDE PLAYING!!

We would leave home in the morning and play all day, as long as we were
back when the streetlights came on.

No one was able to reach us all day. And we were O.K.

We would spend hours building our go-carts out of scraps and then ride
down the hill, only to find out we forgot the brakes. After running
into the bushes a few times, we learned to solve the problem .

We did not have Playstations, Nintendo's, X-boxes, no video games at
all, no 1000+ channels on sat/cable, no video tape movies, no surround sound,
no cell phones, no text messaging, no personal computers, no Internet
or Internet chat rooms..........WE HAD FRIENDS and we went outside and found them!

We fell out of trees, got cut, broke bones and teeth and there were no
lawsuits from these accidents .

We played with worms and mud pies made from dirt, and the worms did not
live in us forever.

Made up games with sticks and tennis balls and although we were told it
would happen, we did not poke out any eyes.

We rode bikes or walked to a friend's house and knocked on the door or
rang the bell, or just yelled for them!

Local teams had tryouts and not everyone made the team. Those who
didn't had to learn to deal with disappointment. Imagine that!!

The idea of a parent bailing us out if we broke the law was unheard of.
They actually sided with the law!

This generation has produced some of the best risk-takers, problem
solvers and inventors ever!

The past 50 years have been an explosion of innovation and new ideas.

We had freedom, failure, success and responsibility, and we learned

HOW TO
DEAL WITH IT ALL!

And YOU are one of them!

CONGRATULATIONS!

You might want to share this with others who have had the luck to grow
up as kids, before the lawyers and the government regulated our lives
for our own good.

and while you are at it, forward it to your kids so they will know how
brave their parents were.
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