Power is a measure of the rate at which energy is used. Thermal power is the term used to refer to the transfer of heat. Mechanical power is the term used to describe when work is being done.

EO 1.1DEFINE the following terms: e. Power

EO 1.2STATE the mathematical expression for: d. Power

EO 1.3For a mechanical system, CALCULATE energy, work, and power.

Power

Power is defined as the amount of energy used per unit time or rate of doing work. It has the units of watt, Btu, horsepower, or ft-lbf/sec.

Thermal Power

Thermal power is the measure of thermal energy used per unit time. It is the rate of heat transfer or heat flow rate. Examples of thermal power units are British Thermal Units (Btu) or kilowatts (Kw). Thermal power is calculated basically by the mathematical expression of:

Thermal energy and calculations of thermal power will be covered in more detail in the Fundamentals Manual for Heat Transfer, Fluid Flow, and Thermodynamics.