A window in a tall building experiences a horizontal wind flow parallel to the surface at a velocity of 8 m/s. The windowmeasures 2 m high, 1.5 m wide and 6.5 mm thick. The transition from the building wall to the window glass surface isnot smooth. The window casement that surrounds the edge of glass pane is raised 10 mm above the surface of the glassand adjacent wall structure. Inside the building, the air temperature and heat transfer coefficient for the interior surfaceare 21 °C and 9 W/m² K respectively. The window has a uniform thermal conductivity of 1.4 W/m K. If the outdoor airtemperature is 5 °C, determine the rate of convective heat loss from the window. Develop a thermal resistance networkfor the window system. Please state and justify all assumptions. Neglect any conduction through the casement.Assume the following air properties: kair =0.0248 W/m K, v= 14.20 x 106 m²/s, Pr = 0.712.Outside Airu=8m/sT=5°CcasementglassInside2 mT=21°Ch=9W/m² K6.5 mm1.5 mCross SectionOutsideT=5°C

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Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.33P

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