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"energy sources" - 108 õppematerjali

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New energy sources

3% to over 20% Numerous awards including The Right Livelihood Award Renewable energy in world Investments 63 billion USD > 120 billion USD 20062009 Wind energy: 74 000 MW to 135 000 MW Solar energy: 5100 MW to 19 000 MW WHAT ARE THE ALTERNATIVES TO TODAYS SOLAR, WIND AND BIOMASS ENERGY SOURCES? Osmotic power How it works? Pressure created by osmosis powers turbines Where could be used Where fresh and salt water meet (creeks, fjords) Desalination plants Now Worlds first test factory in Norway Tofte (2009) Disadvantages Km2s of membranes needed Norway, Tofte Click to edit Master text styles Second level Third level...

Inglise keel
5 allalaadimist
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Energy - põhjalik referaat energiast

These different commercial activities all have unique energy needs but, as a whole, commercial buildings use more than half their energy for heating and lighting. Picture 2.5. How energy is used in commercial buildings Electricity and natural gas are the most common energy sources used in commercial buildings. Commercial buildings also use another source that you don't usually find used in residential buildings--district energy. When there are many buildings close together, like on a college campus or in a big city, it is sometimes more efficient to have a central heating and cooling plant that distributes steam, hot water, or chilled water to all of the different buildings. A district system can reduce equipment and maintenance costs, as well as save energy....

Inglise keele foneetika ja...
18 allalaadimist
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Wind energy vs oil shale

To: Environmental protection agency From: Subject: Wind power versus oil shale Date: September 22 Wind power vs oil shale Introduction The purpose of this report is to analyse if wind power is better than power which is produced from oil shale. The report is based on EWPA (Estonian Wind Power Association) article which is published on their web page. Wind power It is said that the wind power is the most expensive source of power, but this statement is not plausible, because the recourse -wind- is for free. Calculations have shown that if new oil shale blocks were built, it would cost 3473 million EEK in a year per capita. On the other hand, if wind power were renewed in similar amount, it would cost only 868 million EEK per capita in a year. It means that if the wind power were renewed, it would be 17 370 millions EEK cheaper. The fact that wind energy saves resources and produces neither dangerous...

Inglise keel
18 allalaadimist
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Renewable energy

Renewable energy uses natural resources that can be replaced or "renewed" without harming the environment and does not contribute to the greenhouse effect and global warming. Non-renewable energy Non-renewable energy comes from sources that can't be replenished in a short period of time. We get most of our energy from nonrenewable energy sources, which include fossil fuels such as oil, natural gas, coal and from nuclear energy. Unfortunately, burning fossil fuels produces greenhouse gases like carbon dioxide and methane which may cause global warming. Wind energy is the world's fastest growing energy technology. Most renewable energy comes either directly or indirectly from the sun. Hydroelectric energy is the oldest and largest source of renewable energy....

Inglise keel
12 allalaadimist
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Water creates energy

It is produced from moving water and from falls with the help of turbines and dynamos. Hydro-electricity has acquired great significance as a source of energy in the country in the present times and is being put to different uses. The following are the advantages of hydro- electricity in comparison with coal, oil and gas: It is the cheapest and the most various power of all the known energy sources . It is a renewable source of energy. Coal, Oil and Gas would be depleted sooner or later, but water shall remain ever to serve our and natures need. Water is an inexhaustible source of power. Thus, it is a reliable source of power. Hydro-electric stations have a long life. Most of the hydro-electric projects are constructed as multi-purpose projects. The other uses of hydro-electric projects, besides providing power and irrigation, are flood control,...

Inglise keel
5 allalaadimist
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Renewable energy

Renewable energy Meriliin Lend Estonian University of Life Sciences Tartu 2013 Topics Renewable energy Solar energy Wind energy Hydroelectric power Geothermal energy Biomass energy Renewable energy Renewable energy comes from sources that naturally renew, or will not run out in our lifetimes. Includes sunlight, wind, water, geothermal heat and various forms of biomass. Renewable energy cannot be exhausted and is constantly renewed. Does not harm the environment. Saves money. Solar energy Solar energy is the technology used to harness the sun's energy and make it useable. Every hour the sun beams onto Earth more than enough energy to satisfy global energy needs for an entire year. Solar energy use has surged at about 20 percent a year over the past 15 years, thanks to rapidly falling prices and gains in efficiency. Solar energy is inexhaustible. Noise free. Does not harm the environmen...

Inglise keel
6 allalaadimist
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Biogas – The source of future energy

Usage in Lighting: Biogas can be used in LPG-using lamps by burning directly and also by transforming into electricity. The efficiency level is low like 3% when burning. Preparing Hot Water: We can use biogas to provide hot water at home and industrial need and also for geyser and other water heater systems. Usage in Internal Combustion Engine: Biogas can be used in vehicles as an alternative fuel to common energy sources . Especially in Europe, this kind of applications is encouraged by several projects. Electricity Production: Especially in medium and large facilities, biogas is used in electric generators. The electric transformation efficiency of biogas is about 22%- 40%. Biogas as replacement of fuel Biogas is used as transportation fuel in a number of countries, but in Europe it has only reached a major breakthrough in Sweden. All of the biogas plants in Sweden...

Inglise keel
4 allalaadimist
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Green Energy presentation

(EEG)) · The Act came into force in the year 2000 · Initial spark of a tremendous boost of renewable energies in Germany · Proved to be the world's most effective policy framework at accelerating the deployment of renewable energy technologies · The Renewable Energy Act was the central political element of one of the greatest paradigm shifts since the start of the industrial revolution: the shift from fossil and atomic energy supplies to renewable energy sources . Freiburg · Freiburg is a 900 year old city of under 250,000 people, perched in the wine growing region of southwest Germany · Citizens have high environmental awareness · Sunniest Region in Germany, Making it the "Solar Capital" · The Heliotrope (the world's first energy self-sustaining solar building) Germany and the Kyoto Protocol · Sets binding obligations on industrialized countries to reduce emissions of greenhouse gases....

Inglise keel
7 allalaadimist
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Environment and renewable energy

How can we help bring about a change in behavior? * Renewable energy is the sun and the water that people use, but not yet so widely. Required on all homes, various stations, hypermarkets solar panels to use the potential energy, the stock of which is not completed within 5 billion years. * Renewable sources such as wind and solar are intrinsically unsuited to meeting the demand for continuous, reliable supply on a large scale – which comprises most demand in developed countries. The criteria for any acceptable energy supply will continue to be cost, safety, and security of supply, as well as environmental considerations. 2. How can we encourage sustainable development? * To encourage you in the following way. To allocate money for the construction of such stations to States that are unable to pay for expensive power plants. Permanent sponsorshi...

Inglise keel
1 allalaadimist
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Thoughts on Air Pollution Essay

Every time we breathe, we risk inhaling dangerous chemicals that have found their way into the air. Air pollution includes all contaminants found in the atmosphere. These dangerous substances can be either in the form of gases or particles. Air pollution can be found both outdoors and indoors. Pollutants can be trapped inside buildings, causing indoor pollution that lasts for a long time. The sources of air pollution are both natural and human-based. As one might expect, humans have been producing increasing amounts of pollution as time has progressed, and they now account for the majority of pollutants released into the air. Air pollution has been a problem throughout history. Even in Ancient Romepeople complained about smoke put into the atmosphere. The effects of air pollution are diverse and numerous. Air...

Inglise keel
3 allalaadimist
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Stress is a natural part of people

Negative stress can affect people`s ability to be positive. What are the main sources of stress for young people today? What can they do to cope with it? Millions of people around the world live in stress. In particular young people are more often a subject to stress. I want to talk about the stress that young people have. In general there are two types of stress: negative stress and positive stress. First type is the positive stress. It is very important in our life. Positive stress gives you the energy to throw yourself into something what you want to do very well. For example, approximation for exams. In this situation a student begins to learn diligently all materials that he didn’t learn before. On the other hand, we have negative stress too. This type of makes people nervous and they can’t be positive. Nowadays we have a lot of sources of stress. For instance: problems at s...

Inglise keel
6 allalaadimist
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Inglismaa

Mining in Britain has an ancient history. Salt mining, for example, dates back to pre-historic times. Today limestone, sandstone, salt, clay and gravel are found in Britain. Zinc, lead and gold are also mined. Gold is mined in Wales. The biggest coal fields are in Wales, Northern England and Scotland. Britain has the largest energy resources than any country in the EU, mostly in the form of oil and natural gas. Oil and gas are found in the North Sea. Other energy sources include coal and nuclear power. Some alternative energy sources, notably wind farms, are being developed n various parts of Britain. Economy The development of industry in Britain was a long process. Industrialization took place earlier and more rapidly than anywhere else because the existing conditions were favorable in England. In Britain there is a good system of internal waterways and canals, there are no physical barriers to trade and that made the transport...

Inglise keel
46 allalaadimist
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The bodyshop

Tartu Kivilinna Gümnaasium Liis Viljak 10b Bodyshop Company The Body Shop International plc is a global manufacturer and retailer of naturally inspired, ethically produced beauty and cosmetics products. Founded in the UK in 1976 by Dame Anita Roddick, we now have over 2,100 stores in 55 countries, with a range of over 1,200 products, all animal cruelty free, and many with fairly traded natural ingredients. We were the first international cosmetics brand to be awarded the Humane Cosmetics Standard for our Against Animal Testing policy. And we have our own fair trade programme called Community Trade, making us the only cosmetics company with such an extensive commitment to trading fairly. Community Trade now works with 31 suppliers in 24 countries, providing over 15,000 people across the globe with essential income to build their futures. The Body Shop is a leader in the trend towards greater corporate transp...

Inglise keel
18 allalaadimist
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rtf

Scotland

It is part of the United Kingdom, and shares a land border to the south with England. It is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the southwest. In addition to the mainland, Scotland consists of over 790 islands including the Northern Isles and the Hebrides. Edinburgh, the country's capital and second largest city, is one of Europe's largest financial centres. It was the hub of the Scottish Enlightenment of the 18th century, which saw Scotland become one of the commercial, intellectual and industrial powerhouses of Europe. Scotland's largest city is Glasgow, which was once one of the world's leading industrial metropolises, and now lies at the centre of the Greater Glasgow conurbation which dominates the Scottish Low...

Inglise keel
41 allalaadimist
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Lühendite seletus

AA Auto Answer AAA Authentication, Authorization and Accounting AAB All-to-All Broadcast AAC Advanced Audio Coding AACS Advanced Access Control System AAL Asynchronous Transfer Mode Adaption Layer AAM Automatic Acoustic Management AAP Applications Access Point [DEC] AARP AppleTalk Address Resolution Protocol AAS All-to-All Scatter AASP ASCII Asynchronous Support Package AAT Average Access Time AATP Authorized Academic Training Program [Microsoft] .ABA Address Book Archive (file name extension) [Palm] ABAP Advanced Business Application Programming [SAP] ABC * Atanasoff-Berry Computer (First digital calculating machine that used vacuum tubes) ABEND Abnormal End ABI Application Binary Interface ABIOS Advanced BIOS ABIST Automatic Built-In Self-Test [IBM] ABLE Adaptive Battery Life Extender + Agent Building and Learning Environment [IBM] ABM Asynchronous Balanc...

Informaatika
117 allalaadimist
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Piletid vastustega

Ticket No1 1)The characteristic is called output characteristic or volt-ampere charateristic of a Rectifier Diode. 2)Rectifier Diode. 3) A is called Anode and C is called Cathode. An Anode has positive potential and therefore collects electrons in the device. Cathode has negative potential and therefore emits electrons to anode. The symbol looks like an arrow that ponts from the anode to the cathode, and reminds that conventional current flows easily from the p side(anode) to the n side(cathode). BIASING. Forward biasing. If the current in a diode is too large, excessive heat will destroy the device. Even approaching the burnout current value without reaching it can shorten its life. Therefore manufacturer's data sheet specifies the maximum forward current, that diode can withstand. This average current IF is the rate a diode can handle up to the forward direction when used a...

Elektroonika jõupooljuht...
159 allalaadimist
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Aforismid (inglise keeles)

A generalist is ignorant from the point of view of a specialist and a specialist is stupid from the point of view of a generalist. 2. All great stupidity is created by geniuses. 3. All stereotypes are true; the fact that you recognize a slur proves that it isn't. 4. Anything you're afraid is true is true. 5. Before most people get to the point of being able to tell their ass from a hole in the ground they're already assholes and it's too late. 6. Concentrating on something important can make you lose track of your soap opera. 7. Debunking the bunk is everyone's responsibility. 8. Don't ask me to pay for anyone else's mistakes. I make enough of my own. 9. Even those who possess real magic must beware of being misled by "magical thinking." 10. Everyone knows what shit tastes like. 11. Exclusive occupancy of a private room is a basic human right. 12. Fair compensation for genius is wealth. 13. God's not perfect, so it's a pretty...

Inglise kirjandus
141 allalaadimist
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Itaalia referaat

Itaalia Vabariik Referaat Erik Salm Paide Ühisgümnaasium 2007 Itaalia Vabariik ISO 2-täheline kood: IT ISO 3-täheline kood: ITA Lipp: Vapp: Kaart: Geograafiline asend Itaalia Vabariik on riik Lõuna-Euroopas. Itaalia asub 800 km Vahemerre ulatuval saapakujulisel Apenniini poolsaarel. Põhjapoolne piirkond on mägine. Loodusliku piiri moodustavad Alpid. Maastik on suurte mägede ja sügavate orgude rohke. Itaaliale kuuluvad kaks Vahemere suurimat saart ­ Sitsiilia ja Sardiinia - ning hulk väiksemaid saari. Põhjas on Itaalial maismaapiir Austria (430 km), Prantsusmaa (488 km), Sloveenia (232 km) ja Sveitsiga (740 km). Rannajoone pikkus on 7600 km. Enklaavina asuvad Itaalia territooriumil iseseisvad San Marino ja Vatikani riigid. Satelliitfoto Itaaliast Faktid: Pealinn:...

Geograafia
145 allalaadimist
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IPCC summary

1.Radiative forcing is a measure of the influence that a factor has in altering the balance of incoming and outgoing energy in the Earth-atmosphere system and is an index of the importance of the factor as a potential climate change mechanism. 2.The three main things that alter the energy balance of the climate system are the changes in the atmospheric abundance of greenhouse gases and aerosols, in solar radiation and in land surface properties. 3.The two sources for the increased concentration of CO2 in the atmosphere are production, distribution and consumption of fossil fuels and as a by-product from cement production. 4.The two main sources of methane pollution are agriculture and fossil fuel use. 5.Volcanic aerosols are not included to the list because of their episodic nature. 6.The world's oceans absorb more than 80% of heat. 7.The total 20th-century rise is estimated to be 0.17...

Geograafia
5 allalaadimist
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Rootsi

1 Sissejuhatus.................................................................................................................................4 1.1. Rahvaarvu muutused:...................................................................................................5 2. Arengutase.............................................................................................................................. 7 2.1. Hinnaindeksid: ............................................................................................................ 8 3. Linnastumine...

Geograafia
45 allalaadimist


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