Category: Heat transfer

Heat Exchangers, their Applications and Selection Parameters

A brief overview of Heat Exchangers Temperature can be defined as the amount of energy that a substance has. Heat exchangers are used to transfer […]

Shell and Tube Heat Exchanger

Shell and tube heat exchanger consist of a series of tubes. One set of these tubes contains the fluid that must be either heated or […]

Double Pipe Heat Exchanger

Double pipe heat exchanger is the simplest exchangers used in industries. On one hand, these heat exchangers are cheap for both design and maintenance, making […]

Fouling Factor

The performance of heat exchangers usually deteriorates with time as a result of accumulation of deposits on heat transfer surfaces. The layer of deposits represents […]

Atmospheric And Solar Radiation

The sun is our primary source of energy. The energy coming off the sun, called solar energy, reaches us in the form of electromagnetic waves […]

Kirchhoff’s Law

What is Kirchhoff’s Law? To understand Kirchhoff’s law let us consider a small body of surface area As , emissivity ϵ, and absorptivity α at […]

Absorptivity, Reflectivity, and Transmissivity

A brief discussion on Absorptivity, Reflectivity, and Transmissivity of radiative heat transfer Everything around us constantly emits radiation (for heat transfer), and the emissivity represents […]

Blackbody Radiation

A body at a temperature above absolute zero emits radiation in all directions over a wide range of wavelengths. The amount of radiation energy emitted […]

Reynolds Number

The transition from laminar to turbulent flow depends on the surface geometry, surface roughness, free-stream velocity, surface temperature, and type of fluid, among other things. […]

Laminar Flow and Turbulent Flow

If you have been around smokers, you probably noticed that the cigarette smoke rises in a smooth plume for the first few centimeters and then […]