Energy and the Environment CHEN HONG E-mail:chong@fudan.edu.cn Phone:021-65642526 复旦大学环境科学与工程系 Department of Environmental Science and Engineering, Fudan University
Energy and the Environment CHEN HONG E-mail: chong@fudan.edu.cn Phone: 021-65642526
Energy conservation a Penny Saved Is a penny earned The oil not taken from the earth One less barrel of oil is used to No emissions to foul the environment heat your home You save money in the bargain It is better to save a barrel of oil than to find a new one 复旦大学环境科学与工程系 Department of Environmental Science and Engineering, Fudan University
Energy Conservation A Penny Saved Is a Penny Earned One less barrel of oil is used to heat your home The oil not taken from the earth No emissions to foul the environment You save money in the bargain It is better to save a barrel of oil than to find a new one
Energy efficiency The addition of insulation to the outside walls of a house Use of fluorescent rather than incandescent Lower the thermostat setting Some temperature reduction can often be tolerated without undue discomfort, but carrying this approach too far may mean that saving energy carries with it a sacrifice of comfort on the part of the home occupants This element of sacrifice may appear in many situations Walk or ride a bicycle rather than driving a car Hanging the laundry out to dry rather than using a clothes dryer 复旦大学环境科学与工程系 Department of Environmental Science and Engineering, Fudan University
Energy efficiency The addition of insulation to the outside walls of a house Use of fluorescent rather than incandescent Lower the thermostat setting Some temperature reduction can often be tolerated without undue discomfort, but carrying this approach too far may mean that saving energy carries with it a sacrifice of comfort on the part of the home occupants. This element of sacrifice may appear in many situations. Walk or ride a bicycle rather than driving a car Hanging the laundry out to dry rather than using a clothes dryer
he Principle of Energy Conservation Energy conservation 1850-1975 energy consumption increased exponentially In 1970s, projection prediction 4.3%a year, 160Q Btu by 2000 1996,938QBtu/yr Oil embargo in 1973, the cost of energy rose very steep The increased fuel costs coupled with federally-sponsored energy conservation programs and help from public utilities and various community organizations have provided the incentives, education, and means for a significant drive toward a reduction in the use of energy The remarkable achievement In 1973 the ratio of energy consumption to gDP was 27X Btu/s 1990. decreased to 20X103 Btu/S 复旦大学环境科学与工程系 Department of Environmental Science and Engineering, Fudan University
Energy Conservation The Principle of Energy Conservation 1850-1975 energy consumption increased exponentially In 1970s, projection prediction 4.3% a year, 160QBtu by 2000 1996, 93.8 QBtu/yr. Oil embargo in 1973, the cost of energy rose very steeply. The increased fuel costs, coupled with federally-sponsored energy conservation programs and help from public utilities and various community organizations have provided the incentives, education, and means for a significant drive toward a reduction in the use of energy. The remarkable achievement: In 1973 the ratio of energy consumption to GDP was 27×103 Btu/$. 1990, decreased to 20×103 Btu/$ ≠
Main attention will be given to house hold use Buildings and appliances now use about 38% of the total energy consumed in Us, industry uses another 36%, and transportation 26% Se ource Use Natural Gas Electricity Fuel oil LPGa Space heating 3.32 0.39 0.58 0.28 Water heating 1.15 0.36 0.13 0.05 Appliances 0.37 1.67 0.05 Air-conditioning 0.62 Refrigerators Lighting al PGi stands for liquefied petroleum gas, most commonly propane, Source: Energy Information Administration, Washington, D.C. U.S. Department of Encrgy. 2004 复旦大学环境科学与工程系 Department of Environmental Science and Engineering, Fudan University
Main attention will be given to house hold use. Buildings and appliances now use about 38% of the total energy consumed in US, industry uses another 36%, and transportation 26%