EPSC 181 Study Guide - Final Guide: Concentrated Solar Power, Passive Solar Building Design, Thermal Efficiency
Document Summary
Network through which power is generated, transmitted, a distributed to consumers. Depends on an object"s position in an electric field. Flow of electric charge across a certain element. Exists when there is a net movement of electric charge through a medium. Direction of current is always opposite the movement of negative charges. Current can be generated by particles of either charge. Power = rate of flow of energy. Resistance heating (loss of power due to resistance in the wires) Ohm"s law relates volts, amps and resistance of a wire (volts/ohms = amps) For a given power, higher volts requires lower amps. Power lost = resistance x current squared reducing current by increasing voltage lowers resistance loss in transmission. Hydro is greenhouse gas producing in the tropics/temperate areas due to methane in the reservoir. Reservoirs silt up, can re-mobilize soil contaminants, cause erosion downstream can interfere with fish spawning have a lifetime most available rivers already exploited.