NATS 1745 Lecture Notes - Lecture 1: Kilowatt Hour, Surface Mining, Electrical Energy
17 Feb 2016
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1. 1. 1 energy: the ability to do work eg, to make something move, or to provide heat. 1. 1. 3 energy is always conserved: in any process, input energy equals output energy. Chemical energy (from the bonds between atoms) Kinetic energy (from motion; increases with mass & speed) But, some forms of energy, like heat, are difficult to convert to other forms, so we must conserve/ration the useful forms. 1. 2. 1 power: the amount of energy produced (or used) in an amount of time (ie, power = energy/time). Energy: calories (c) or joules (j); 1c = 4200j. Power: watts (w); 1w = 1j of energy per sec; 1kw = 1000w. Energy: kilowatt-hour (kwh); the amount of energy used over a number of hours (1 kwh. 1. 2. 3 to make energy do work, it must meet a task"s power needs (ie, a required amount of energy is needed within a certain amount of time)
