Your company has received complaints about condensation on the outside surface of their new model of refrigerator.
Question:
Your company has received complaints about condensation on the outside surface of their new model of refrigerator. The walls have fiberglass insulation with thickness L f in between two layers of mm thick sheet metal. For the insulation, kf WmK; for the sheet metal, km
WmK The operating manual suggests that the refrigerators internal temperature should be kept at C The heat transfer coefficients at the inner and outer surfaces of the wall are h in Wm K and h out Wm K respectively. The kitchen temperature averages C
In initial testing, you find that condensation occurs when the temperature of the outer surface drops below C
A Calculate the maximum heat flux through the refrigerator wall that will prevent condensation.
B Calculate the minimum thickness L f of fiberglass insulation needed to prevent condensation.
C If this thickness is used, determine the temperatures on both sides of the fiberglass layer.
Use L f cm if you could not solve part B
College Algebra
ISBN: 978-0134697024
12th edition
Authors: Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels