energy in the home

energy in the home - By the end of this unit you should :1....

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By the end of this unit you should :- 1. Know that energy is required for heating, lighting and operating appliances. 2. Know that energy can be supplied from electricity,gas oil, or solid fuel. 3. Know that the cost of home heating depends on the fuel and installation costs. 4. Know that the cost of running an appliance depends on the power.
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5. Know that energy costs can be calculated from the difference between two meter readings. 6. Know that energy losses cost money. 7. Know that energy can be lost by convection ,conduction and radiation. 8. Know that heat loss can be cut down by insulation, double glazing, and draught excluders. 9. Know that heat waste can be cut down by for example using showers instead of baths.
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10. Know that many appliances use thermostats to keep a steady temperature.
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These are the four main activities that people use energy for in a house.
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1. By looking at the picture shown, list the number of ways in which energy is used. 2. Which appliances use the most energy?
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Energy can be supplied to the home in three ways. 1. Electricity :- this is brought to us from power stations.It comes via pylons and underground cables. 2. Gas :- this comes from the north sea.It is pumped along pipelines to gas stations. 3. Solid fuel :- this is the form of coal, wood or peat.Coal is mined and peat is cut from the ground.
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Most houses use either 1. Gas central heating. 2. Electric central heating. 3. Gas fires. 4. Electric fires.
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Hot water 20% TV 10% cooking 10% Room Heating 65%
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The next slide shows the uses of energy in the home. The uses are :- 1. Hot water 20%. 2. T.V. ,lights etc. :-5%. 3. Cooking :- 10%. 4. Room heating :- 65%. Think of other appliances and add them to the diagram.
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We see from the pie chart and previous slides that :- 1. More than two thirds of energy is used for heating and lighting. 2. This energy can come from coal , gas, or electricity. The following table compares the cost of installing and running the three different types of fuel.
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2 Bedroom flat without cavity wall insulation Solid fuel Mains gas electricity installing Running Cost per year £1400 £1200 £800 £300 £240 £210
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Once you have copied the previous slide, copy and answer the Following questions.
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This note was uploaded on 11/08/2011 for the course PHYSICS 121 taught by Professor Richardvanfleet during the Winter '09 term at BYU.

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energy in the home - By the end of this unit you should :1....

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