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Thermodynamics: Mechanical Energy

Mechanical energy is a form of energy that can be converted into mechanical work. An example of mechanical energy is the energy of steam that is used to move the turbines within a power plant. Both kinetic energy and potential energy are forms of mechanical energy. Also, even though pressure itself is not a form of energy, the forces of pressure acting on a fluid can produce mechanical work. To calculate mechanical energy per unit mass refers to the equation below. Equation 1 is a form of Bernoulli's equation.

Mechanical energy equation due to pressure (1)

P = Pressure

ρ = Density

v = velocity

g = gravitational constant

z = fluid head


To calculate the power in relation to mechanical energy equation 2 would be used.

Mechanical power equation due to mass flow rate (2)

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