Introduction:
Energy cannot be created or destroyed, but energy can be converted from one form to another. By design, an engineer creates an energy conversion system to change an input energy form into a desired output energy form. However, within a conversion system, input energy can be changed into less desirable forms of energy. Less desirable forms of energy conversion can occur due to resistance and friction, resulting in thermo energy conversion. Engineers strive to decrease undesirable energy conversions within a system, or energy losses, by planning with system efficiency in mind. Efficiency is the ratio of desired output energy compared to input energy.