Loft Insulation Assesment

Topics: Thermodynamics, Heat, Temperature Pages: 5 (518 words) Published: December 4, 2014
﻿PART 1 | Research and collecting secondary data

PART 2 | Planning and collecting primary data
Loft Insulation Experiment
Hypothesis
The thicker the insulation the less the heat is lost.
Variables
Independent variable
I am going to change the amount of layers of insulation and the material of the layers.

Dependent variable
I am going to observe the change in temperature when the container is covered with one layer, 2 layers and 3 layers.

Controlled variable
I am going to keep the amount of water and container the same. I am also going to make sure each layer of materials gets the same amount of time.

Things Needed

Material
Its Use
Risk

Hot water(100ml)

To be able to measure the rate of heat of the water with the thermometer. You might end up spilling the water and burning yourself.

Measuring cylinder

To measure the volume of water.
Easily breakable.
Thermometer
To measure the temperature of the water.
The glass thermometer might fall and break so clean it up quick or more risks can happen. Stopwatch
To insure that each layers of materials have the same amount of time to reduce the rate of heat The timer might also fall and break which means it would not work properly. 4 Metal Containers
To hold the water.
The metal container is malleable so it might fall and someone could step on it and sharp edges.

Layers of Insulation

To reduce the rate of heat or in other word keeping the water warm. You could tear it easily so don’t stretch it.

Lid

To make sure no heat escapes from the container.
Might break and sharp edges.

Method
1. First warm up the water in the kettle. Then you get the four containers; wrap each container with a different material (only one layer).

2. Measure the boiled water in the measuring cylinder (only 100ml). After you have measured put 100ml in each container. 3. Measure the temperature of each container (each should be the same but measure them anyway). Write down the material and the starting temperature for each one. 4. Close the lids and get your stop watch, time 5 minutes.

5. When 5 minutes have gone, measure the temperature of the water again. This is the ending temperature write this next to the material and starting temperature. 6. It should look like this so far. Remember to add a column for the difference between the temperature at the beginning

One layer
Material
Start temp.
Finish temp.
Difference temp.
Cloth
--
--
--
Newspaper
--
--
--
Felt
--
--
--
Bubble wrap
--
--
--

7. Repeat 1-6 but now use two layers of the material on each metal container. 8. Repeat 1-6 again but this time use three layers of the material on each metal container. 9. You now probably have 3 tables like the one above for: one layer; two layers; and three layers. Now we just need to put all these tables into one like the one below.

Layers of Insulation
Change in temperature (c*)

Start temp.
End temp.
Difference
Cloth

Newspaper

Felt

Bubble wrap

Results
Layers of Insulation
Change in temperature (c*)

Start temp.
End temp.
Difference
Cloth
50

50

Newspaper

Felt

Bubble wrap