Task 01 An industrial freezer is designed to operate with an internal air temperature of -20 0C  when the external air temperature is 25 0C  and the internal and external heat transfer coefficients are 12 W/m2K  and 8 W/m2K  , respectively. The walls of the freezer are composite construction, comprising of an inner layer of plastic ( k=1 W/m.K , and the thickness of 3 mm) , and an outer layer of  stainless steel  (k=16 W/m.K  , and thickness of 1mm). Sandwiched between these two layers is a layer of insulation material with k=0.07 W/m.K and the thickness of 195mm. Find the overall heat transfer coefficient and determine the heat transfer through the industrial freezer.

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Q: 1. If the thermal conductivity increase the heat transfer coefficient wi

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Q: QUESTION 41 A domestic refrigerator with inner dimensions of 0.7 m by 0.7 m at the base and height 1…

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Q: In steady state, the heat transfer coefficient "k" is L=0.5 m Left face temperature of infinitely…

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Q: QUESTION 8 A 1m by 2m glass wool insulation wall (k=0.036 W/mK) with a thickness of 5cm has an…

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Q: a) A 50 mm diameter carbon steel tube (ρ = 7833 kg/m3; Cp = 465 J/kg.K, k = 54 W/mK) at an initial…

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Q: Chilled pharmaceutical is transported through a steel pipe ( k= 15.0 W/m.k) with an inner diameter…

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.