Fundamental Principles:Work, energy and power

Work, energy and power

Work is done (or energy is transferred) when an object is moved against a force, and is defined as:

Fundamental Principles-0010

Fundamental Principles-0011

In the Imperial fps system expression 1.5 gives a unit of ft lb f. For metric systems the unit is cm kg f. The SI unit of work is the joule, where 1 J = 1 N m (= 1 m2 kg s−2). Table 1.8 compares these, and other, units of work.

Power is the rate at which work is performed:

Fundamental Principles-0012

Related posts:

Control principles for variable speed pumping:Methods of controlling a rotodynamic pump
Variable speed drives:Power drive systems
Health and safety:Dust risks, Dust emission and Dust as a health hazard.
First approximation design methods:Operating point and Solids loading ratios.
Operating problems:System components
Operating problems:Filters and Material degradation
Control components in a hydraulic system:Hydraulic fuses.
LINES, FITTINGS, AND SEALS:LINES, FITTINGS, AND SEALS
Pressure and flow:Flow measurement.
Pressure regulation:Relief valves,Non-relieving pressure regulators and Relieving pressure regulat...
Air Compressors, Air Treatment and Pressure Regulation:air treatment
ENERGY TRANSFER BY HEAT,WORK,AND MASS:FLOW WORK AND THE ENERGY OF A FLOWING FLUID
ENTROPY:ENTROPY BALANCE
FORCED CONVECTION:GENERAL THERMAL ANALYSIS
FORCED CONVECTION:THERMAL BOUNDARY LAYER

Leave a comment

Your email address will not be published. Required fields are marked *