Q1) The rear window of an automobile is defogged by attaching a thin, transparent, film-type heating...
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Q1) The rear window of an automobile is defogged by attaching a thin, transparent, film-type heating element to its inner surface. By electrically heating this element, a uniform heat flux may be established at the inner surface. What is the electrical power that must be provided per unit window area to maintain an inner surface temperature of 15C when the interior air temperature and convection coefficient are 25C and 10 W/m.K and the exterior (ambient) air temperature and convection coefficient are -10C and 65 W/m.K? The window glass's thickness and conductivity are 4 mm and 1.4 w/m.k, respectively. What would be the inner surface temperature if there is no electrical heating element? Q1) The rear window of an automobile is defogged by attaching a thin, transparent, film-type heating element to its inner surface. By electrically heating this element, a uniform heat flux may be established at the inner surface. What is the electrical power that must be provided per unit window area to maintain an inner surface temperature of 15C when the interior air temperature and convection coefficient are 25C and 10 W/m.K and the exterior (ambient) air temperature and convection coefficient are -10C and 65 W/m.K? The window glass's thickness and conductivity are 4 mm and 1.4 w/m.k, respectively. What would be the inner surface temperature if there is no electrical heating element?
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