EGEE 102 Energy Conservation And Environmental Protection Introduction Course Objectives The objective of the course is to apply energy efficiency concept in day to day life in order to save Money and Energy and thereby protect the Environment By obtaining necessary knowledge and information on the main operating principles of devices appliances that are in common use and information on which to make the right decision in selecting the most energy efficient and economical choice EGEE 102 Pisupati 2 Day to Day Energy Use EGEE 102 Pisupati 3 What is Energy Energy is a property of matter that can be converted into work heat or radiation EGEE 102 Pisupati 4 Energy Scale BTU One BTU is the equivalent to the energy required to raise the temperature of one pound of water by one degree Fahrenheit ENERGY SCALE EGEE 102 Pisupati 5 1022 Btus Energy Scale Annual energy from sun reaching earth 1020 1018 1016 World annual energy consumption U S annual energy consumption 1014 1012 1010 10 8 10 6 10 4 10 2 10 0 World per capita annual energy consumption U S per capita annual energy consumption Energy in one gallon of gasoline Average daily human food intake Energy needed to raise the temperature EGEEpound 102 Pisupati of one of water by one degree Farenheit 6 Energy Source Fuels Classification Non renewable limited in quantity or depleting Fossil Fuels Coal Natural Gas Petroleum Oil Shale Tar Sands Nuclear Fission Renewable unlimited by rate of use or non depleting Solar Hydro Wind Tidal Biomass Nuclear Fusion EGEE 102 Pisupati 7 World Fossil Fuel Distribution EGEE 102 Pisupati 8 Environmental Issues Energy and Environment Greenhouse effect and global warming Ozone Layer Destruction Acid Rain Formation Radiation and Health EGEE 102 Pisupati 9 Fundamental Forms of Energy Mechanical Potential and kinetic Heat Radiant Sun Light Electrical Chemical Food we eat and a tank of gasoline Nuclear Nuclear Reactor Bombs used in war EGEE 102 Pisupati 10 Energy Measurement Units BTUs Calories calories kWh Joules One can be converted to another if the conversion factor is known EGEE 102 Pisupati 11 Conversion Factors 1055 Joules 1 Btu 1 Calorie 1 000 calories 1kWh 3 412 Btus EGEE 102 Pisupati 12 Energy Transformations Chemical to Electricity Chemical Energy Oil Chemical to Electrical Energy Sound and Light Kinetic Energy Chemical energy toEGEE Work102 Pisupati 13 Energy Conversion Devices Energy Input Energy Output Hair Dryer Lawn Mover Trees Solar Automobile EGEE 102 Pisupati 14 Power Energy or work Power Time Energy is the capacity to do work Power is the rate at which work is done Unit 1 watt 1 J s 3 412 Btu h EGEE 102 Pisupati 15 Unit of Power is watt W defined as 1 Watt 1 J s ft lb 1 hp horse power unit 550 S I x I x R I2 R EGEE 102 Pisupati 16 Illustration 1 On a winter day a home needs 1 x 106 BTU of fuel energy every 24 hours to maintain the interior at 65 F At what rate is the energy being consumed in watts Energy Power Time EGEE 102 Pisupati 17 Recall that Watt J s and 1 055J 1 BTU 1 x 106 BTU 1055J 1 h 24 h 1 BTU 3600s J 3 J 12 200 12 2 x 10 12 2 kW S S EGEE 102 Pisupati 18 Illustration A 100W light bulb is left accidentally on overnight 8 hours How much energy does it consume And how much money does this cost if electricity cost 10 cents per Kilowatt hour EGEE 102 Pisupati 19 Energy Use Power x Time of Power Use 100W 8h 800Wh 0 8kWh Cost of the Energy Energy Used x Cost of Unit of Energy 0 10 0 8kWh 0 08 1kWh EGEE 102 Pisupati 20 Calculation of Money Made Person Wage Rate power Hours Total Worked Amount time Energy A 7 h 10 70 B 20 h 10 200 C 50 h 20 EGEE 102 Pisupati 21 Calculation of Your Energy Consumption List the appliances that you use at home Note down their power consumption and estimating the time of usage calculate approximate energy consumption for a month Electric bulbs number of bulbs Refrigerator Washer Dryer Dishwasher etc EGEE 102 Pisupati 22