A double-glazed window assembly consists of two glasses, each 6 mm thick, and an air gap of 6 mm thickness between these glasses. Ignore the radiation heat transfer, calculate the rate of heat transfer occurring in a day when the outdoor temperature is -5°C and the room temperature is 28°C. h =15 W/m?K, h2= 9 W/m?K, kcam=1.4 W/mk, knava=0.025 W/mk

A double-glazed window assembly consists of two glasses, each 6 mm thick, and an air gap of 6 mm thickness between these glasses. Ignore the radiation heat transfer, calculate the rate of heat transfer occurring in a day when the outdoor temperature is -5°C and the room temperature is 28°C. h =15 W/m?K, h2= 9 W/m?K, kcam=1.4 W/mk, knava=0.025 W/mk

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.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.13P: 1.13 If the outer air temperature in Problem is –2°C, calculate the convection heat transfer...

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1.13 If the outer air temperature in Problem is –2°C, calculate the convection heat transfer coefficient between the outer surface of the window and the air, assuming radiation is negligible.
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In a new residential project, you strongly believethat double-paned windows are ‘better’ than singlepaned windows. Compare the rate of heat loss betweensingle and double-paned windows (1.5 m x 1 m) if thethickness of each pane is (th = 0.4 cm) and (k = 0.9W/m.K). The indoor and outdoor temperatures are 18°C and 2 °C, respectively. Thickness of the air gapbetween the double-paned windows is (th = 1 cm), and(k = 0.022 W/m.K). Image credit: Windowwhirl
A double-glazed window assembly consists of two glasses, each 6 mm thick, and an air gap of 6 mm thickness between these glasses. Ignore the radiation heat transfer, calculate the rate of heat transfer occurring on a day when the outside temperature is -5 ° C and the room temperature is 28 ° C. h1 = 15 W / m2K, h2 = 9 W / m2K, kcam = 1.4 W / mK, khava = 0.025 W / mK
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