Soomlase Juha Laitila 2007. aasta uurimustöös „Harvesting Technology and the Cost of Fuel Chips from Early Thinnings“ käsitletakse harvendusraiel kogutava küttelaastu tehnoloogiat ja maksumust. Uurimustöö tehti, kasutades olemasolevaid parameetreid ning mudeleid. Puistu, mis võeti arvutuste aluseks, pindala oli kaks hektarit ning saadud puitmass 60 kuupmeetrit. Keskmise eemaldatud puu ruumala oli 30 liitrit. Linnulennult puistust terminali oli 40 kilomeetrit. Kännuraha ei kasutatud arvutustes. Tuginedes uurimusele, siis küttelaastu maksumus oli 31,9 kuni 41,6 eurot kuupmeetri kohta või 14,9-19,4 eur/MWh, 40%-se laastu niiskuse juures. Olgu ka öeldud, et 2006 aasta seisuga oli laastu kasutamisel selle hind 11,95 eur/MWh Kasutati ka erinevaid raietehnikaid. Selgus, et laastu kogumisel antud parameetrite juures tuli odavam kasutada saemeest kui „harwarder“ (harvester ja forwarder) süsteemi. Hinnavahe oli peaaegu et kahekordne. Kuid ei t...
Student: Choose boilers for the district heating network (load duration curve d Calculate annual payments of loan and interests Calculate heat price for loan period, after loan period and for lifetim (Take into account capital cost and fuel Fuels wood chips and/or light fuel oil Boiler lifetime 15 years Loan period 6 years Discount rate 10% 4.5 4 Heating 3.5 Hot tap w 3 MW Total 2.5 ...
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...
ADVANCES IN TECHNOLOGY 1. My new cellular phone allows me to send text messages anywhere within the country and abroad. (communications) 2. Don't forget to turn on the modem if you want to go-online. (information technology) 3. The advent of endoscopic surgery has greatly reduced the post-operative recovery time of most patiens. (medical) 4. Supermarkets of the future will make use of scanners to read the contents of your trolley and total up your bill. (electronics) 5. Factories which rely on humans working on assembly lines are becoming a thing of the past. (industrial) 6. You would be quite astounded by the number of satellites orbiting the Earth. (space) 7. Not only would a solar powered vehicle be safe, it would also make use of one of the planet's greatest natural resources. (energy) COMPUTERS 1. I'm terribly sorry I'm late but traffic congestion...
SISUKORD ENERGY STORY................................................................................................................4 USES OF ENERGY............................................................................................................. 4 2.1 Uses of energy in homes...............................................................................................5 2.2 Types of energy used in homes.................................................................................... 6 2.3 Energy use in different types of homes........................................................................ 6 2.4 Commercial Energy Use...............................................................................................9 2.5 Industrial and Manufacturing Energy Use..................................................................11 2.6 Transportation Energy Use.................................................
How to produce bioenergy from agricultural resources without harming the environment Jürgen Aosaar Jaak-Albert Metsoja Ahto Oja BOVA cource on biogas from biomass March 3-7 2008 Tartu Deciduous tree species on abandoned agricultural land Current situation • The long term development plan of the Estonian energy industry foresees a reduction in the use of fossil fuels and an increase in the share of biofuels: by the year 2010 renewable energy must account for 5.1% of total energy consumption Current situation (2) • In Estonia we have abandoned arable land about 400 000 ha, part of it is overgrowing naturally, and another part has been afforested • For short-rotation forestry in Estonia, ecologically and economically the most suitable tree is probably grey alder, which is a highly productive and soil improving species Grey alder...
1·1 Chapter 1 Routine maintenance and servicing 1 Contents Air cleaner element renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 Fuel filter renewal - fuel injection engines . . . . . . . . . . . . . . . . . . . .36 Alternator drivebelt check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 Hinge and lock check and lubrication . . . . . . . . . . . . . . . . . . . . . . .31 Automatic transmission fluid level check . . . . . . . . . . . . . . . . . . . . .27 ...
Main Sights England is known for its many world-famous sightseeings and people all around the world come to see them. Some of them are even like symbols of England. The most famous ones are: Stonehenge is one of the greatest national icons of Britain. That prehistoric monument is located in the plain of Salisbury, in the county of Wiltshire in the south-west of England. It is built of 150 enormous stones which are set in a purposive circular pattern. Stonehenge was probably built to mark the longest and shortest day of the year because it lies on the line of the midsummer sunrise and the midsummer sunset. That would have enabled people to keep a record of changing of seasons. Although it is still unclear who built it. Hadrian’s Wall is an ancient wall which was built in 2nd century by Hadrian, the emperor of Rome from AD 117 to 138, and it marked the northern border of the Roman Empire in Britain. The wall was 80 Roman miles (117 kilom...
ELEKTROENERGEETIKA INSTITUUT Referaat Taastvad Energiaallikad Esitamise tähtaeg 14.04.2009 Õppejõud: Hannes Agabus Tudeng: Sergei Belosapko Nikita Naumov Tallinn 2009 Contents: 1. Renewable energy 1.1. Costs................................................................................................................... 2 1.2. Potential future utilization..............................................................................4 1.3. Why Don't We Use More Renewable Energy? ...........................................5 2. Energy Types 2.1. Wind Energy.......................................................................................................6 2.1.1. Annual Generation........................................................................................7 2.1.2. ...
,,Puud ja metsad on kõige kallim aare, mida loodus on inimesele andnud" (Plinius) Puitkütus M Maht õõtühikud, nendevahelised seosed. Olulisemad mõisted m3 kuupmeeter, tm (m3) tihumeeter üks m3 õhuvahedeta puitu. Võib arvestada koorega või koore- ta. Puidu ruumala (mahu-) ühik, millega arvestatakse ka puistu tagavara. rm ruumimeeter e riidakuupmeeter üks m3 puitu koos õhuvahedega (virnmaterjali mõõtühik). Selle asemel kasutatakse ka mõistet riidakuupmeeter ehk steer, pm e pm puistekuupmeeter - ühe m3 suuruses mahus (puistangus) vabalt sisalduv 3 puitkütuse (tavaliselt hakkpuidu) kogus. Soojushulk Energia 1 kJ (kilodzaul) = 0,239 kcal (kilokalor), 1 kWh = 860 kcal, 1 kcal = 4,178 kJ. 1000 kcal = 1,16 kWh. Võimsus (soojushulk ajaühik...
The Cataclysmic Death of Stars Republished from the pages of National Geographic magazine Written by Ron Cowen March 2007 Ever since he was a teenager, Stan Woosley has had a love for chemical elements and a fondness for blowing things up. Growing up in the late 1950s in Texas, "I did everything you could do with potassium nitrate, perchlorate, and permanganate, mixed with a lot of other things," he says. "If you mixed potassium nitrate with sulfur and charcoal, you got gunpowder. If you mixed it with sugar, you got a lot of smoke and a nice pink fire." He tested his explosive concoctions on a Fort Worth golf course: "I screwed the jar down tight and ran like hell." "kaboomWoosley", now an astronomer at the University of California at Santa Cruz, has graduated to bigger explosions--much bigger. Woosley studies some of the most powerful explosions since the birth of the universe: supernovae, the violent deaths of stars. The universe twi...
CHAPTER 1 GETTING TO KNOW THE TOEFL WHAT IS THE TOEFL? The TOEFL is a comprehensive English language examination required by more than 3,000 colleges and universities in the United States, Canada, and other parts of the world. In addition, foreign born professionals frequently need a TOEFL score for certification to practice their profession in the United States or Canada. The TOEFL is a timed test that consists of the three sections listed here. THE TOEFL Section 1 Listening Comprehension 50 questions 35 minutes Part A Statements 20 questions Part B Short Dialogs 15 questions ...
THE W R I T E R ' S JOURNEY M Y T H I C STRUCTURE FOR W R I T E R S THIRD EDITION CHRISTOPHER VOGLER S C R E E N W R I T I N G / W R I T I N G Christopher Vogler explores the powerful relationship between mythology and storytelling in his clear, concise style that's made i this book required reading for movie executives, screenwriters, playwrights, fiction and non-fiction writers, scholars, and fans of pop culture all over the world. Discover a set of useful myth-inspired storytelling paradigms like "The Hero's Journey," and step-by-step guidelines to plot and • character development. Based on the work of Joseph Campbell, The Writers Jour...
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Handbook of Meat Processing Handbook of Meat Processing Fidel Toldrá EDITOR A John Wiley & Sons, Inc., Publication Edition first published 2010 © 2010 Blackwell Publishing Blackwell Publishing was acquired by John Wiley & Sons in February 2007. Blackwell’s publishing program has been merged with Wiley’s global Scientific, Technical, and Medical business to form Wiley-Blackwell. Editorial Office 2121 State Avenue, Ames, Iowa 50014-8300, USA For details of our global editorial offices, for customer services, and for information about how to apply for permission to reuse the copyright material in this book, please see our website at www.wiley.com/ wiley-blackwell. Authorization to photocopy items for internal or personal use, or the internal or personal use of specific clients, is granted by Blackwell Publishing, provided that the base fee is paid directly to the Copyright Clearance Cent...
PRAISE FOR The 4-Hour Workweek "This is a whole new ball game. Highly recommended." --Dr. Stewart D. Friedman, adviser to Jack Welch and former director of the Work/Life Integration Program at the Wharton School, University of Pennsylvania "It's about time this book was written. It is a long-overdue manifesto for the mobile lifestyle, and Tim Ferriss is the ideal ambassador. This will be huge." --Jack Can eld, cocreator of Chicken Soup for the Soul®, 100+ million copies sold "Stunning and amazing. From mini-retirements to outsourcing your life, it's all here. Whether you're a wage slave or a Fortune 500 CEO, this book will change your life!" --Phil Town, New York Times bestselling author of Rule #1 "The 4-Hour Workweek is a new way of solving a very old problem: just how can we work to live and prevent our lives from being all about work? A world of in nite...
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