EARTH 101 Lecture Notes - Lecture 13: Solar Water Heating, Wind Turbine, Renewable Energy
16 Mar 2018
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13 - renewables 1: solar and wind power. Renewable energy - source that you can use without end. Energy - quantifies the amount of work that a certain force can do. stored - has the potential to do work. 1 newton = force required to accelerate 1 kg by 1 m/s2. 1 newton = force of gravity on an apple. Joule = amount of energy needed to apply a 1n force a distance of 1 meter. Energy required to lift an apple by 1 meter. We get energy in the form of electricity from the power company. Power = rate at which energy is used (unit = watt) Cost of a solar water heater system = ,000. Cost of a conventional gas/water heater = . Swanson"s law - price of photovoltaic modules tends to drop 20% for every doubling o cumulative shipped volume. China produces more pv power than any other country (nearly twice as much)
