Cylindrical pillars similar to those of .22are positioned
Chapter 13, Problem 13.106(choose chapter or problem)
Cylindrical pillars similar to those of 4.22are positioned between the glass sheets with a pillar-to-pillar spacing of W. The inside surface of oneglass sheet is treated with a low-emissivity coatingcharacterized by ?1?0.05. The second inner surfacehas an emissivity of ?2?0.95. Determine the ratioof conduction to radiation heat transfer through asquare unit area of dimension W?Wfor W?10,20, and 30 mm. The stainless steel pillar is located atthe center of the unit area and has a length ofL?0.4 mm and diameter of D?0.15 mm. The con-tact resistances and glass temperatures are the sameas in 4.22.
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