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An investigation into the efficiency of an immersion heater 2

Extracts from this document...

Introduction

Page:

Mohamed Hassan                student no: 20042512

An investigation into the efficiency of an immersion heater

Introduction:

        An emersion heater is primarily used to heat water. It does this by using electrical power and converting it into heat energy.

The amount of energy supplied to the emersion heater will be worked out using the formula: Voltage image05.png Current image05.pngTime.

The heat gained by the water was calculated by using the formula: Mass of water image05.png Specific heat  image05.png Temperature change.

This will then be used to calculate the efficiency of the heater. Efficiency is how good the item being tested is

...read more.

Middle

temperature of water after 2 minutes

To get a fair and average result I will change the type of wire I am using as well as the S.W.G of the wires but not the length of the wire so as to get a variety of results ands therefore see what wire is more efficient to use in the immersion heater.

Results:

Below are the tables of the results I got once I had carried out the experiment.

Constantan 28 S.W.G

Length

Voltage

(v)

Amps (c)

Time in water

Electrical energy

Initial temp (oC)

Final temp (oC)

Temp change (oC)

40cm

9.30

4.30

2 minutes

4798.8  

23

35

12

Nickel chrome 28 S.W.G

Length

Voltage

(v)

Amps (c)

Time in water

Electrical energy

Initial temp (oC)

Final temp (oC)

Temp change (oC)

40cm

10.27

2.05

2 minutes

2525.42

23

30

7

...read more.

Conclusion

 Things that I would change about this experiment if I  was to do it again would be that I would try more types of wires and a different variety of S.W.G s as there weren’t many different types of S.W.G s available at the science lab.

...read more.

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Here's what a teacher thought of this essay

3 star(s)

This report has an appropriate structure and the language used is good.
1. The plan is missing several sections including a variables and safety section.
2. The conclusion is very brief and does not use the data to back up the claim.
3. The report is missing an evaluation section.
***

Marked by teacher Luke Smithen 05/09/2013

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