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Title: A concrete wall of a cold storage room measures 3.0 m high, 5.0 m wide, and 20 cm thick. The inside ... Post by: Chery on Nov 30, 2016 A concrete wall of a cold storage room measures 3.0 m high, 5.0 m wide, and 20 cm thick. The inside wall is to be covered by a layer of wood in order to reduce the rate of thermal energy flow through the wall by 90 percent. The inner surface of the wooden wall is maintained at -10°C and the outer surface of the concrete wall is at 20°C. The thermal conductivities of concrete and wood are 0.80 W/m ∙ K (concrete) and 0.040 W/m ∙ K (wood). What should be the thickness of the layer of wood?
A) 60 mm B) 70 mm C) 80 mm D) 90 mm E) 100 mm Title: Re: A concrete wall of a cold storage room measures 3.0 m high, 5.0 m wide, and 20 cm thick. The ... Post by: noreyaga on Nov 30, 2016 Content hidden
Title: Re: A concrete wall of a cold storage room measures 3.0 m high, 5.0 m wide, and 20 cm thick. The inside ... Post by: Chery on Jan 13, 2017 I needed this so much, thanks
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