A double-glazed window consists of two sheets of glass separated by an L = 0.2-mm-thick gap. The
Question:
A double-glazed window consists of two sheets of glass separated by an L = 0.2-mm-thick gap. The gap is evacuated, eliminating conduction and convection across the gap. Small cylindrical pillars, each L = 0.2 mm long and D = 0.15 mm in diameter, are inserted between the glass sheets to ensure that the glass does not break due to stresses imposed by the pressure difference across each glass sheet. A contact resistance of R"t,c =1.5 X 10–6 m2 · K/W exists between the pillar and the sheet. For nominal glass temperatures of T1 = 20°C and T2 = 10°C, determine the conduction heat transfer through an individual stainless steel pillar.
Step by Step Answer:
Fundamentals Of Heat And Mass Transfer
ISBN: 9780470501979
7th Edition
Authors: Theodore L. Bergman, Adrienne S. Lavine, Frank P. Incropera, David P. DeWitt