A positive value for work indicates that work is done by the system on its surroundings a negative value indicates that work is done on the system by its surroundings. Work is done on the system when a pump is used to move the working fluid from one location to another. Work is done by the system when it is used to turn a turbine and thereby generate electricity in a turbine-generator. In dealing with work in relation to energy transfer systems, it is important to distinguish between work done by the system on its surroundings and work done on the system by its surroundings. It equals the product of the force (F) times the displacement (d).ĭetermine the amount of work done if a force of 150 lbf is applied to an object until it has moved a distance of 30 feet. Work is defined for mechanical systems as the action of a force on an object through a distance. This distinction between the forms of energy that are properties of a system and the forms of energy that are transferred to and from a system is important to the understanding of energy transfer systems. Part of such surroundings-defined work can have a mechanism just as for system-defined thermodynamic work done by the system, while the rest of such. Work is a process done by or on a system, but a system contains no work. Work is a form of energy, but it is energy in transit. Kinetic energy, potential energy, internal energy, and P-V energy are forms of energy that are properties of a system. Thermodynamics Directory | Heat Transfer Directory Work - Thermodynamic Properties - Thermodynamics
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