P1b Keeping Homes Warm

Energy Loss from a House Saving Energy

(Homework (30mins approx P1b Keeping Homes Warm ENERGY FOR THE HOME Payback Time and Energy Efficiency Copy and complete the table below: (4 marks) Insulation Cost Annual Saving Payback Time (Yrs)  Loft Insulation £400 £80   Double Glazing £2,000 £50   Cavity Wall Insulation £600 £60   Draught Excluder £40 £20   Which type of insulation costs the most? Which type of insulation is the most effective? Which type is the most “cost effective”? Which type pays for itself after 40 years? (4 marks) An ordinary light bulb is 8% efficient. If it uses 1,000J of electrical energy how much energy is wasted as heat (3 marks) A gas boiler wastes 260J for every 1,000J of energy it is supplied with. What is the efficiency of this appliance? (3 marks)How could the waste energy be reduced? (1 mark) Total 15 marks (Homework (30mins approx P1b

P1b Keeping Homes Warm17/05/2010James Ferguson Claydon High School1Copy and complete the table below:4 marksP1b Keeping Homes Warm ENERGY FOR THE HOMEHomework 30mins approxPayback Time and Energy Efficiency5yrs40yrs10yrs2yrsDouble GlazingWhich type of insulation costs the most? Which type of insulation is the most effective? Which type is the most “cost effective”? Which type pays for itself after 40 years? Loft InsulationDraught ExcluderDouble Glazing4 marks© 2006 James FergusonP1b Keeping Homes Warm17/05/2010James Ferguson Claydon High School2An ordinary light bulb is 8% efficient. If it uses 1,000J of electrical energy how much energy is wasted as heat?  1 mark 1 mark 1 markTotal 3 marksP1b Keeping Homes Warm ENERGY FOR THE HOMEHomework 30mins approxPayback Time and Energy Efficiencywaste energy = 1,000 - 80waste energy = 920J© 2006 James FergusonP1b Keeping Homes Warm17/05/2010James Ferguson Claydon High School3A gas boiler wastes 260J for every 1,000J of energy it is supplied with. What is the efficiency of this appliance?

P1b Keeping Homes Warm17 May 2010James Ferguson Claydon High School1Keeping Homes WarmMr Ferguson Year 10 GCSE (Higher) ENERGY FOR THE HOME OCR Gateway Science Suite Lessons 3-4 (P1b)17 May 2010© 2006 James FergusonP1b Keeping Homes Warm17 May 2010James Ferguson Claydon High School2IndexThermograph Energy Loss for a House Saving Energy Way of Saving Energy Payback Time Conduction Convection Radiation Energy Efficiency Energy Efficiency CalculationsP1b Keeping Homes Warm17 May 2010James Ferguson Claydon High School3ObjectivesInterpret data and calculate cost savings of different energy-saving strategies. Explain in the context of the home: Conduction Convection Radiation (absorption and emission) State and use the equation for energy efficiency.P1b Keeping Homes Warm17 May 2010James Ferguson Claydon High School4ThermographsThermographs are pictures which represent temperature using colours. White is the hottest Blue is the coldestP1b Keeping Homes Warm17 May 2010James Ferguson Claydon High School5Energy Loss from a HouseRoof 25%Walls 35%Floor 15%Doors 15%Windows 10%P1b Keeping Homes Warm17 May 2010James Ferguson Claydon High School