北师大版高中英语必修三Unit 9 Lesson 3 Clean Machines 教学课件.ppt-(纯ppt课件,无音视频素材)

1、Unit 9 Lesson 3 Clean machines Clean Machines Clean MachinesIs your car clean?Is your car clean?What is most important,if you live in a big modern city?Many would answer the car.You will find it difficult to go to work or move without a car.More and more families have their own cars in order to make

2、 life more convenient,but have you ever thought about what would happen to the city?The more,The more,the better?the better?Test your knowledge about cars.Name Type StyleEnergyAdvantages Disadvantages Are you interested in cars?If so,how many different types of cars have you seen or you know about?T

3、alk about cars in your group.Talk about the car you know best in your group.The following questions and the key words in Exercise 2 are for your reference.1.What type of car are you going to talk about?2.What do you think is the most important to a car?3.What are the main kinds of fuel used for cars

4、?4.Is the fuel used for the car you are talking about favorable?5.Whats the problem with the fuel now?Have you got any idea to improve a car?Speak it out and share it with your friends.Name of the carConditionsProblemsYour ideaYour friends ideaLook at the following picture.Whats it?Have you ever hea

5、rd of a solar car?Read the interview.Maybe you will find something special.Read the interview to learn about the solar car racing and remember to collect information.Questions/ProblemsAnswers/Solutions1 What is a solar car?2 Solar cars are clean and safe.3 When did Marie Logan begin to design solar

6、cars?4 Six.A car which uses suns energy for power.Why are people interested in solar cars?At university.How many races has Marie Logan taken part in?Questions/ProblemsAnswers/Solutions5 Where did the race Marie liked best take place?6It did in four days7 What has Marie been doing recently?8 What els

7、e has Marie been doing?9It ran across the whole of Australia from North to South.How long did the race take?Building a new car with a team from Queensland University.Writing a book about solar carsWhats the main problem with solar cars?They are too slow or unreliable.What do you think of the solar r

8、acing car?Would you like to have a try to design one of your own?Improve your former design.Name of your carType Former design(Problem)New design(Improvement)Reason for improvementDescribe your design of a new car to your friends and listen to their suggestions.NameOpinionSuggestionsGoodProblemHow t

9、oReason If you are really interested in solar car racing,read more about solar car racing.What is a solar car?Solar Car A solar car is a light weight,low power vehicle designed and built with a single purpose in mind-racing(or raycing,a combination of race and ray from the sun).Similar to an Indy or

10、 Formula One race cars,solar cars do not represent a practical means of transportation.They have limited seating(usually one,sometimes two people),they have very little cargo capacity,and they can only be driven during the day.They do,however,offer an excellent opportunity to develop future technolo

11、gies that can be applied to practical applications.Solar vehicles representing five college teams left Cal State-Sacramento on Tuesday morning at the start of a six-day,670-mile race to Los Angeles.They reached Stanford via Vallejo,the San Francisco-Oakland Bay Bridge,a foggy San Francisco and Highw

12、ay 280.Read to learn about solar car racing.Known as the Brain-Sport of our time,the World Solar Challenge entrants will traverse more than 3,000km of the Australian continent from tropical Darwin to balmy Adelaide,in cars powered by nothing more than the sun The Challenge,to design and build a car

13、capable of crossing Australia on the power of daylight,comprehends the most innovative research and development of alternative transport technologies.The World Solar Challenge attracts teams and individuals from corporations and universities all over the worldSolar car races were led across the firs

14、t-day finish line by the Western Washington Universitys Viking XX,a sleek car under a slanted array of solar cells like a roof of shiny blue tile.The Viking,which reached Stanford with an elapsed driving time of 4 hours,27 minutes,placed fifth internationally in the World Solar Challenge in Australi

15、a last November.The cars are powered by the sun,but the race itself is powered by the organization and dedication of college students.It started with the Stanford Solar Car Project,a loose collection of 40 or so students who have so far built two solar cars with a little faculty advice and a lot of

16、hard work.Graduate student Dave Caditz spearheaded the idea of a race that would zig-zag across California and inspire the publics interest in alternative-powered vehicles.The 8th World Solar Challenge will depart Darwin on Sunday 25 September 2005.Scrutineering commences on Thursday 22 September,an

17、d most teams spend at least a week in Darwin preparing for departure.The World Solar Challenge is a celebration of achievement,of courage and the application of scientific knowledge in the field of solar technology.This is the adventure of young people not only dreaming of a safer,smarter,greener wo

18、rld,but of skilled young enthusiasts working to make it a reality.The American Solar Challenge The American Solar Challenge(ASC)is a competition to design,build and rayce solar-powered cars in a cross-country event.In 2005 there will be a special edition of ASC,the 2005 North American Solar Challeng

19、e.Teams will compete in a solar vehicle rayce from United States through Canada!In 1997,UniSA,Seaton High School,Fremont-Elizabeth City High and Annesley College formed the South Australian Solar Car Consortium.The aim of the Consortium was to help students design,build and race solar cars in the Wo

20、rld Solar Challenge.A solar car races down the street in the World Solar Challenge.Held every two years in Australia,the race began in 1987 and was the worlds first solar car raceThe History of Solar Car Racing Hans Tholstrup and Larry Perkins pioneered solar car racing when they completed an epic S

21、olar Trek from Perth to Sydney(Australia)in 1983.What followed was a series of solar car races designed to increase public awareness.The 1987 Australian World Solar Challenge saw 23 participants inaugurate the first such race,followed by the European Tour de Sol,the American Tour de Sol,and the SUNR

22、AYCE.Some spectacular corporate and college vehicles adorned these early races and are pictured below.How to Design a Solar CarHow to Design a Solar Car If you are interested If you are interested in solar car racing,in solar car racing,please read the please read the following to learn how followin

23、g to learn how to design a solar car.to design a solar car.Designing and Building a Solar CarRead and learn how to make a solar car.Designing and building a solar car is an enormous project that can take up to two years to complete.Energy Flow for a Solar CarEnergy flow diagram for a solar car The s

24、unlight hits the cells of the solar array,which produces an electrical current.The energy(current)can travel to the batteries for storage,go directly to the motor controller,or a combination of both.The energy sent to the controller is used to power the motor that turns the wheel and makes the car m

25、ove.Driver ControlsSolar cars do have some of the standard features found in conventional cars,such as turn signals(front&rear),brake lights,accelerator(gas pedal),rear view mirrors,fresh air ventilation,and usually cruise control.Electrical System The heart of a solar car is the electrical system w

26、hich is made up of batteries and power electronics.The electrical system controls and manages all the power that enters and exits the systemDrive Train The drive train will consist of the electric motor and the means by which the motors power is transmitted to the wheel causing the vehicle to move.M

27、echanical Systems They are designed to minimize friction and weight while maintaining the strength needed to handle the various road conditions.Solar Array The solar array is the vehicles only source of power during the cross-country Rayce.Body&Chassis The most distinctive part of solar cars are the bodies.The sleek and exotic shapes are eye catching.Now you have a solar racing car!Why not try your solar car?Thank you