The calculation of overall heat transfer coefficient U using the equations previously presented can be rather tedious. Heat transfer specialists have computer programs to calculate…
Category: Mechanisms of Heat Transfer
For shell-and-tube heat exchangers with shell-side baffles, the shellside fluid flow is perpendicular to the tubes. In this arrangement, the outside film coefficient can be…
The outside film coefficient for a process coil in a liquid bath heater is the result of natural or free convection. Temperature variations in the…
The inside film coefficient represents the resistance to heat flow caused by the change in flow regime from turbulent flow in the center of the…
The overall heat transfer coefficient is a combination of the internal film coefficient, the tube wall thermal conductivity and thickness, the external film coefficient, and…
The temperature difference may not remain constant throughout the flow path. Plots of temperature vs. pipe length for a system of two concentric pipes in…
Most heat transfer processes used in production facilities involve combinations of conduction and convection transfer processes. For example, in heat exchangers the transfer of heat…
The transfer of heat from a source to a receiver by radiant energy is radiation. The sun transfers its energy to the earth by radiation.…
The transfer of heat within a fluid as the result of mixing of the warmer and cooler portions of the fluid is convection. For example,…
The transfer of heat from one molecule to an adjacent molecule while the particles remain in fixed positions relative to each other is conduction. For…