Energy, Energy Transfer and Energy Analysis

Forms of Energy 

Macroscopic Form of Energy:

The energy which a body posses by its whole that it is measured with respect to some outside reference frame.

Microscopic Form of Energy:

The energy which is related to the molecular structure of a system and a degree of molecular activity. These energies are independent of the outside reference frame.

kinetic and Potential Energies:

Kinetic energy is defined as the energy related to motion of the body.

Potential energy is defined as the energy associated with the position of the body.

Total Energy of a System:

In the absence of magnetic, electric and surface tension effects, the total energy of a system consist of sum of internal, potential and kinetic energies.

Volume, Mass and Energy Flow Rate:

Volume flowing through area per unit time is called Volume Flow Rate.

Amount of mass flowing through a cross section per unit time is called Mass Flow Rate.

Energy associated with a fluid at mass flow rate is called Energy Flow Rate.

Mechanical Energy:

The form of energy that can be converted to mechanical work completely and directly by a device. Like kinetic energy, potential energy, pressure, e.t.c.

Energy Transfer by Heat:

It is a boundary phenomena in which energy transfer take place due to the difference in temperature of bodied. 

Energy Transfer by Work:

Energy transfer take place due to the force acting a distance.

Shaft Work or Mechanical Work:

Spring Work:

It is a mechanical work in which work is done due to spring.

First Law of Thermodynamics:

Law of Conservation of Energy states that;

Energy can neither be created nor be destroyed but it can be transfered from one form to another.