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A company, interested in the design of cups used for hot drinks, decides to manufacture a new cup, designed to keep the hot drink as hot as possible.

Extracts from this document...

Introduction

Investigation:

The Design Of A

Coffee Cup

Brief

A company, interested in the design of cups used for hot drinks, decides to manufacture a new cup, designed to keep the hot drink as hot as possible.

        Before making the new cup, they need to know the answers to the following questions:

  • In what ways can a cup of hot drink loose energy?
  • Which of these methods causes the drink to cool down quickest?
  • What is the best design to prevent heat loss?

Investigation

In our investigation we are going to investigate into the following

forms of heat loss:

  • Radiation
  • Convection
  • Conduction
  • Evaporation

Investigation:

The Design Of A

Coffee Cup

Radiation:

Aim

        Our aim in this experiment is to find ways to prevent heat energy escaping from a cup through radiation. We will investigate into and find ways of preventing radiation.

Research

        Radiation is the flow of atomic and subatomic particles and waves, such as those that characterise heat rays and x-rays. All matter is constantly bombarded with radiation of both forms from cosmic and terrestrial sources. Radiation is released when unstable nuclei decay. There are three main types of radiation Alpha Beta and Gamma. Alpha and Gamma radiation can be stopped by aluminium foil.

Apparatus

        In the experiment we will need:

  • Aluminium Foil
  • Kettle
  • Water
  • Thermometer
  • Stop clock
  • Beaker
  • Copper calorimeter

Investigation:

The Design Of A

Coffee Cup

Hypothesis

I predict that the aluminium foil will have a positive affect on the temperature of the hot water inside, keeping it warm.

...read more.

Middle

Graph to show the temperatures of the two cups during the experiment

Key =            ________  -  Aluminium Calorimeter

                ________  -  Control Calorimeter

Investigation:

The Design Of A

Coffee Cup

Evaporation

Aim

Our aim in this experiment is to find ways to prevent heat energy escaping from a cup through evaporation. We will investigate into and find ways of preventing evaporation.

Research

        Evaporation is the process by which the liquid rises into the air thereby loosing heat energy. A way of stopping evaporation is to place a polystyrene piece on top of the calorimeter, this will stop heat escaping.

Apparatus

        We are going to use the following pieces of apparatus:

  • Polystyrene piece
  • Kettle
  • Stop Clock
  • Thermometer
  • Copper Calorimeter
  • Water
  • Beaker

Hypothesis

        I predict that the polystyrene piece will have a large affect on the temperature of the water. I think that it will keep the liquid hotter for longer when compared with the control cup. This is due to the fact that the polystyrene piece will not allow any heat energy to escape from the drink keeping it cooler.

Investigation:

The Design Of A

Coffee Cup

Method

  • Boil water in kettle, and pour into both calorimeters
  • Start stop clock
  • Place piece of polystyrene on top of one cup
  • Measure begging temperature
  • Measure temperature every minute for the next 9 minutes
  • Measure finishing temperature after this

Diagram

Results table

Copper Calorimeter

Start Temp

1min temp

2min temp

3min temp

4min temp

5min temp

6min temp

7min temp

8min temp

Finish temp

Polystyrene Calorimeter

87

86 c°

85 c°

83 c°

80 c°

77 c°

73 c°

70 c°

68 c°

66

Control Calorimeter

87

86 c°

84 c°

80 c°

76 c°

71 c°

66 c°

62 c°

58 c°

55 c°

Investigation:

...read more.

Conclusion

Investigation:

The Design Of A

Coffee Cup

Final Cup Design

        The final cup design involves using the data from the previous experiments and coming up with the best design. This cup would also involve mixing designs from the previous experiments and mixing then all into one design that would keep heat as high and constant as possible fro as long as possible.

        1- The cup would involve using something to cover it to prevent evaporation which is, as we have proved, a factor of heat loss in a hot drink. We will use the polystyrene covers as we used in the previous experiment as this was proved to prevent heat energy being lost and kept the drink hotter for longer.

        2- Another design feature of the cup would be insulation to prevent the cup from loosing heat energy from conduction, which we have proved in previous experiment is a factor of heat loss in a hot drink. We will use as insulation in the form of wool surrounded by a tin.

        3-The last feature of design we will use is to prevent radiation into the cup. It is designed to prevent the hot drink loosing energy through radiation. We are going to use a covering of aluminium foil to stop the radiation. It will be wrapped around the tin can.

...read more.

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