• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6
7. 7
7
8. 8
8
9. 9
9

# Investigation into the Effectiveness of Insulation at Preventing the Loss of Thermal Energy from the Home.

Extracts from this document...

Introduction

Investigation into the Effectiveness of Insulation at Preventing the Loss of Thermal Energy from the Home Aim I intend to find out which insulation is most effective at preventing thermal energy transfer in the home and also which is more cost-effective. I.E. which costs less to buy but makes a larger reduction in your heating bill. Introduction Thermal energy is usually transferred by:- Conduction: This is where thermal energy is conducted through a material. It does this because on one side of the material the air is hotter than on the other side. So, the thermal energy is conducted from an area of warm air to an area of cooler air. Materials that are good electrical conductors also tend to be good thermal conductors, like; Gold, Silver and copper. These will all readily conduct thermal energy as well as electrical energy. Materials like wood, that don't conduct electricity, are also poor conductors of thermal energy. Evaporation This is where the molecules of water that are hotter than the air outside the water rise up out of the liquid as a gas. These molecules take some of the thermal energy of the liquid with them so, evaporation can cool down the water. This also work on our body, as we sweat and the sweat evaporates our body is cooled by the evaporation because the thermal energy of our body is taken in the molecules of sweat. Convection This is where the hotter water molecules of water will rise up to the top of the container and the cooler molecules sink to the bottom. This happens because as molecules become hotter the also become less dense so they will rise to the top, and the cooler particle will sink to the bottom to take their place. The heat energy from the hotter molecules at the top will escape by evaporation in a liquid. This does not only happen in liquids, it also happens in air so the majority of the thermal energy will be lost from the top of the container or through the roof of the house. ...read more.

Middle

So, all that the foam floor insulation will be near is the cooler water particles at the bottom of the beaker. Also, only about 15% of the energy that is lost from our homes is lost through the floor. Obviously the control experiment should be the worst because it has no insulation at all. Apparatus I will use the following apparatus:- * Beaker * Boiling Water * Kettle * Thermometer * Card * Carpet tile * Foam * Stop clock Method I will first set up all of the apparatus shown in the preceding diagrams. I will then boil the kettle and pour the water in the beaker being aware of the safety that is involved with boiling water. I will make sure that the kettle and the beakers of boiling water are in the middle of the table and not on the edge where they can be easily knocked off; it would also be a good idea to have a sign or some sort of notification that boiling water is being used so people will be more careful around it. I will use 200cm3 of water; this will be measured using the scale on the side of the beaker. I will start the clock when the temperature drops to 85oc so this way, if any of the water is below what it should be it won't matter because I will have to wait for all if the experiments to cool to 85oc (this way it will be a fair test). When the clock is started I will take the temperature of each experiment individually at one minute intervals for ten minutes. To try to increase the accuracy of the investigation I will repeat each experiment so I have two results, I will then find the average of these results so they will be more accurate and there will be less anomalous results shown on my graphs. ...read more.

Conclusion

Because of this, the carpet may have radiated the heat that it was storing away from the beaker. If I did this experiment again I could use white carpet tile or even foam as the wall insulation, this would greatly increase the accuracy of my results. Another error that could have caused anomalous results was the fact that the beakers could have been made by different manufacturers and had different compositions. This could have made the glass conduct thermal energy more easily or radiate heat more easily then others. This would cause results that were not consistent. Next time I do this experiment I will ensure that all of the beakers are from the same manufacturer or I could even use the same beaker, though this would be time consuming. Also loose fitting insulation that is where the insulation doesn't completely touch the beaker all the way around. For example if the lost insulation foam wasn't touching the beaker all the way round water could evaporate and the accuracy of the experiment would be compromised. Also if the carpet tile was a loose fit around the beaker, thermal energy could be conducted out of the glass, wouldn't get trapped in the air in the carpet and would go straight into the atmosphere and cause inaccurate results. If I did this again I would make sure that all of the insulation was a snug fit. There could have been errors in the double glazing because in real, modern double glazing in homes the air is sealed, air tight low pressure gas. Because it wasn't sealed around the top air could escape with thermal energy causing erroneous results. Also the fact that there was no low pressure gas present would have affected the accuracy of the experiment. This would be very difficult to simulate in the lab without using actual double glazing. Though I could make it more air tight by putting a Vaseline seal around the top of the beakers but under high temperatures this could melt. ?? ?? ?? ?? Physics Coursework - William Eardley 11.1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related AS and A Level Energy, Respiration & the Environment essays

1. ## To make sure we have plenty of energy in the future, it's up to ...

4 star(s)

The mirrors are called heliostats and turn to face the sun all day long. The light is reflected back to the top of the tower in the center of the circle where a fluid is turned very hot by the sun's rays.

2. ## The Effectiveness of Different Solutions to Prevent or Treat Malaria

4 star(s)

Chloroquine is a complicated compound with still an unclear way of how it works. What do we know is that inside the red blood cells, the malaria parasite must corrupt the hemoglobin for the gaining of essential amino acids, which the parasite requires to construct its own protein and for energy metabolism which is essential for it to grow.

1. ## An investigation into the distribution of adult and juvenile limpets on a rocky shoreline.

Press the Ran# button 3.Then press the = button 4.Use this number to measure the limpet on the tape 6. Now take the 0.25m2 quadrat and place it along the starting point of the tape measure, then use the previously generated number from a calculator to flip the quadrat

2. ## Why the Body Needs Energy? Every living cell within the ...

pressure of the blood forces the atria shut (producing the heart sound 'lub', this sound occurs when the pressure opens the semi - lunar valve and the blood passes into the aorta and the pulmonary arteries. Diastole is when the ventricles relaxes, however the pressure in the ventricles falls below that in the arteries.

1. ## Weed study. Dandelions - descrption and characteristics. Investigation to dandelion distribution.

Such competition affects plant succession. Competition is also apparent in such ecosystems as agricultural fields. Many weeds are better able to use water and minerals than are the crop plants with which they grow. Consequently, farmers must employ various methods of weed control in order to check the spread of weeds.

2. ## Yeast Coursework

First I will place the polystyrene cup inside a plastic beaker that will make it more stable. A polystyrene cup is used because it insulates water inside it, making it lose temperature more slowly, meaning that it will be easier to keep at a constant temperature.

1. ## Bats investigation

When it was possible to see further than my hand at arm's length, a sign on the wall advertised the three types of bat living in the Twilight Zone. Three ... .the tourist guide and the website had only advertised two.

2. ## Investigation into how Lichen growth is affected as you move further away from a ...

9am Tuesday morning when the traffic would be expected to be the same and when the weather would be similar. I chose to do this as the weather could affect my findings as the sites could have changed and also if I visited the sites in different weather conditions then there would be different risk assessments to consider.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to
improve your own work