Solar cooker. 1)How can we make use of reflection to gather more solar energy ? We use black boxes to absorb heat energy and aluminium paper to reflect.

Slides:

Advertisements

Similar presentations

S2 Revision Heat. Temperature Temperature is a measure of the hotness or coldness of something and is measured in ˚C. There are three different ways that.

Advertisements

Solar Cooker. Introduction Nowadays, popularity of solar cooker is widespread from Europe to Asia. Our group wants to find out what the structure of the.

P1b(i) Keeping Homes Warm

Introduction People use solar cookers primarily to cook food and pasteurize water, although additional uses are continually being developed. Numerous.

APPLICATIONS OF HEAT TRANSFER

What size is your carbon footprint? Thermal Insulators and Conductors In this lesson you are going to learn about conductors and insulators. Can you remember.

Solar Cooker Mrs. McGuffey’s Science Class 2 nd Semester Project.

Radiation Infra-red radiation transfers heat between all objects. Infra-red radiation is an electromagnetic wave and can travel through a vacuum. Heat.

Methods of enhancing the collection of solar energy.

Use Me ! The Energy Which Never Ends !. Energy Crisis is the one of the major issues which influence our lifestyle. Its not pertaining to a particular.

4E( ) Chan man Hang(2) Chow Chui Shan(5) Lam Yuen Ching(10) Ma King Man(13) Yeung Po Yee(16)

Greenhouse Heating Requirements Greenhouse Management.

Chapter 2 Section 1  The sun provides nearly all of the energy which powers the atmosphere.  That energy comes to us in the form of electromagnetic.

Transmission of Heat.

Energy & Environment. This is the Focus point, where the rays are concentrated to. Parabolic Reflecting material is used to Concentrate the Rays This.

Solar energy is the heat which comes from the sun. It is very clean and non-polluting energy so that it is best for humans using. Actually, the energy.

Introduction of solar cooker……………………………………P.1 Principles of solar cooker……………………………………P.2- 3 Processes of making a solar cooker…………………………P.4-6 Introduction.

HEAT TRANSFER & The NATURAL GREENHOUSE EFFECT. TRAPPING HEAT  A “ greenhouse ” is any structure that is designed to take in the sun’s energy and trap.

Atmospheric Heating.

Solar Energy & Weather 6.4.7: Explain how solar energy affects Earth’s atmosphere and surface (land and water).

Solar Cooker Report” *Group 4. >Draft: Solar Cooker aluminium foil Plastic sheet Box Base Space Container.

content 1. Objective 2. Materials used 3. Design and construction skills 4. Application of physics principle in the design 5. Test of the cooker 6. Conclusion.

Energy & Environment. Concentrating the sun rays Converting the light energy into heat energy Trapping heat Using certain materials for their beneficial.

Bell Work What is specific heat? Take notes on video –Write at least 3 facts from the video.

Chapter Eleven: Heat 11.1 Heat 11.2 Heat Transfer.

How Switched On Are You? HEAT Radiation Reflection Absorption

Solar Energy Winds Convection Climate Zones global.

Sources of Energy Harnessing Solar Energy. Direct methods: Collecting solar energy as heat energy with the help of solar heaters and solar cookers. Converting.

Radiation, Conduction, Convection. Heat Transfer Processes 1._____________ - Sun heats Earth’s surface in the form of rays or waves 2._____________.

1._____gases that surround the Earth and keep it warm and wet 2._____layer that meteors burn up in 3._____bottom layer of the atmosphere RAP.

Mr. Fleming. The trapping of heat from the sun by gases in the Earth’s atmosphere. The major gas contributing to this process is Carbon dioxide gas.

The trapping of heat from the sun by gases in the Earth’s atmosphere. The major gas contributing to this process is Carbon dioxide gas. Greenhouse effect.

30 th April 2015 LO: To understand what affects energy transfer by radiation Radiation STARTER: If conduction and convection need particles to transfer.

Heat Transfer in the Atmosphere Essential Question: How is heat transferred in the atmosphere?

Insulation  To understand how insulation works. Double Glazing  Which of the statements about the double glazing are true?  Our windows will keep heat.

The Atmosphere Preview Section 2 Atmospheric Heating Concept Mapping.

What processes heat the atmosphere?

 Allow sunlight in but trap heat in (greenhouse effect). 2 nd most important!  Glass or plexiglass, double paned with air space between works best 

SOLAR COOKER REPORT.

Heat Transfer, Albedo, and the Natural Greenhouse Effect.

Big box Big box Small box Small box Black paper Black paper Aluminum foil Aluminum foil Plastic sheets Plastic sheets Sausage Sausage.

3.3 Radiation Can heat be transferred from the Sun to us through conduction and convection? What is radiation? No! Conduction and convection cannot transfer.

P.1 Book 1 Section 4.3 Radiation Frost Energy transfer by radiation Emission and absorption of radiation Check-point 4 Examples of heat transfer by radiation.

Atmospheric Heating Radiation Conduction Convection.

Name : Mrs. Bharati Vivek Gorwadkar Roll No.: 16 Subject: Science Topic: Heat Prof. Incharge: Prof. Rajendra Thigle.

Solar Oven Investigation How different linings affect oven performance.

We use a firm to make the shape of the solar cooker, it can reduce the heat loss by conduction, convection and radiation.

++Save money ﹏ the material we used were recycled one. ++Convenient ﹏ we do not need to look after it when heating the water. ++ Protect the environment.

CHAPTER 19 HEAT TRANSFER IN THE ATMOSPHERE. WHAT IS THE ATMOSPHERE? Earth’s atmosphere is heated by the transfer of energy from the sun. Some heat comes.

Sect. 2, Ch. 1.  How long does it take for the energy from the sun to reach Earth?

A presentation on Solar 6tem Hybrid Oven “Utilizing the power of light to bring change to our generation”

The Greenhouse Effect. A greenhouse is a building used to grow plants when the outside temperature is too low. The roof of the greenhouse prevents convection.

Black paper Aluminium Foil Staples Cling wrap Cardboard Metal box Heatproof mat Scissors.

Cardboard Aluminium can Aluminium foil Black paper Wrap.

Solar Cookers. People use solar cookers primarily to cook food and pasteurize water, although additional uses are continually being developed. With an.

Atmospheric Heating.

Physics Project Group members: Josephine Kwan(11) Wendy Lai(12)

Today’s Driving Question

Greenhouse effect The trapping of heat from the sun by gases in the Earth’s atmosphere. The major gas contributing to this process is Carbon dioxide gas.

Designing a Solar Cooker

Keeping hot water hot challenge.

Natural Sciences Grade 7

Atmospheric Heating Chapter 15 section 2

Thermal Energy on the Move

Solar Heater Guidelines

The Greenhouse Effect and Global Warming

Chapter Eleven: Heat 11.1 Heat 11.2 Heat Transfer.

Presentation transcript:

Solar cooker

1)How can we make use of reflection to gather more solar energy ? We use black boxes to absorb heat energy and aluminium paper to reflect solar energy onto a tin of water.

2)What kind of materials should be used to construct the body of the solar cooker?Why? Black box – Absorb more solar energy Aluminium paper – Reflect solar energy Glue – to stick the aluminium paper Tin – container of water

3)what other measure can help to reduce heat loss by conduction and convection? A polystyrene box reduce heat loss by conduction. It is an insulating box. A lid reduce heat loss by convection. Warm air can’t easily move upward to escape away from the box.

4)How can we make use of greenhouse effect to trap more solar energy? To trap heat energy making use of greenhouse effect. The radiation enters the box and warms up the air inside. This radiation can’t easily escape through the glass and is trapped inside the box. This keeps the boxe warm, so that the temperature of water will increase gradually under the sun.

5)How should the container of water look like? A aluminium can paint in black colour. It is because black colour surface is a good absorber of heat. Then, we can wrap the can with some cotton. It is because cotton can trap heat. Water is filled to ¾ of the can. So the water can heat up more quickly.

6) When and how the solar cooker should be used to enhance its performance? After 10 minutes, the sun made the air of solar cooker warm up. So the temperature of the water started increasing. At the end, the temperature of solar cooker increase 18 degrees.

Data recording Time/min Temperature/ o C Time/min Temperature/ o C

COMMENT We think this project is difficult. It is because we need so many material to make the solar cooker. Unfortunately, we have to make the solar cooker once again, because our solar cooker had been thrown away by somebody. Then, we have to do a lot of experiment, and we should discuss the result.

Group members : 4D (1, 8, 9, 16, 19)

The end