The system under consideration is an electronic circuit

Assignment Help Mechanical Engineering

Reference no: EM13632222

The system under consideration is an electronic circuit board, oriented vertically in 27 degree C air. Due to electric resistance heating, the circuit board is dissipating a total of 22 Watts. It has dimensions of 16cm by 16cm and is insulated on the back side. The object of this problem is to minimize the temperature of the circuit board. This needs to be done by trying the following four things: (a) free (or natural) convection (b) forced convection (using a fan for flow) (c) free convection with fins (d) forced convection with fins Note: For the finned cases, apply rectangular pure aluminum fins, 3 mm thick, 1.5cm long, vertical, from bottom to top of the circuit board, neglect "contact resistance" and use the same convection heat transfer coefficient as for the "no fin" cases. Consider applying a single fin or more than one fin. You also do not need to consider radiation heat transger in the calculations. However, you should consider how the resuts for the no-fin cases might change if radiation heat transfer is included in the analysis Calculate the circuit board temperature for each case to see which option gives the best results.

Reference no: EM13632222

Questions Cloud

A refrigerator in a laboratory uses r-22 as the working : a refrigerator in a laboratory uses r-22 as the working substance. the high pressure is 1200 kpa the low pressure is

Two large parallel conducting plates are 21 cm apart and : two large parallel conducting plates are 21 cm apart and have charges of equal magnitude and opposite sign on their

A horizontal insulated cylinder has a frictionless piston : a horizontal insulated cylinder has a frictionless piston held against stops by an external force of 500 kn. the piston

Evaluate the practice of altering the alpha level so that a : evaluate the practice of altering the alpha level so that a two-tailed test will have a 5 rejection region on both

The system under consideration is an electronic circuit : the system under consideration is an electronic circuit board oriented vertically in 27 degree c air. due to electric

A rigid steel bottle v 025 m3 contains air at 100 kpa 300 : a rigid steel bottle v 0.25 m3 contains air at 100 kpa 300 k. the bottle is now charged with air from a line at 260 k

A classical system of n distinguishable non-interacting : a classical system of n distinguishable non-interacting particles of mass m is placed in a three dimentional harmonic

A mass density of 640 kgm3 the rotor turns at 120 rpm : an inventor has proposed a multi-blade wind turbine. the downwind rotor is to have a diameter of 12.2 m. each blade is

What is the minimum height you would have to place a solid : what is the minimum height you would have to place a solid ball of mass m and radius r i 2mr2 5 on a hill in order

User Account

All Pages