A pile of biomass (1.6 m deep, with a thermal conductivity of 0.41 W/mK) has been semi-buried in the ground. You may treat the pile like a 1-D slab. The top of the pile is exposed to ambient air at 23ºC with a convection coefficient of 13 W/m2K. The bottom of the pile always remains at the ground temperature (15ºC). Microbial activity in the pile is producing heat at a constant rate of 15 W/m3. What is the top surface temperature of the pile at steady-state?.

Q: A copper rod has an initial length 5.0 cm and a thermal expansion coefficient of 16 x 10-6 /K. It is…

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Q: The thermal conductivity of a sheet of rigid, extruded insulation is reported to be k = 0.029 W/m-K.…

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Q: HEAT CONDUCTION ON PLANE WALLS 15. A composite slab is made from three layers of 15 cm, 10 cm and 12…

A: Givenlayer 1t1=15cm =0.15mk1=1.45W/mK  with A1=60%k2=2.5W/mK   with A2=100-60=40%layer 2t2=10cm…

Q: Calculate the convection heat transfer coefficient value on the outer surface of the insulation to…

A: The environment air temperature is, T0=30°C The thickness of the insulating material is, L=4 cm The…

Q: Two walls of a stol composed of insulating materia (k=0.25 KJ/hr-m-°C) with 15 cm thick and concrete…

A: Given   For insulating material Thermal conductivity, k1 = 0.25 kJ/hr.m.K…

Q: A cylindrical steel tank with a diameter of 3 m and height of 4.4 m is used to store chilled water…

A: Given:  r = d/2 = 3/2 = 1.5 m H = 4.4 m h = 15 W/m2K

Q: To increase the rate of heat transfer from a device, which has 0.1 m² of exposed surface, you added…

A: Given data: Area of exposed surface = A = 0.1 m2 Length of fin = l = 4 cm = 0.04 m Diameter of fin =…

Q: 6/20 The force P is applied to (a) the 60-lb block and (b) the 100-lb block. For each case,…

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Q: 1. Judging  from its unit W/m.K can we define thermal conductivity of a  material as the rate of…

A: 1. We can not define thermal conductivity as the rate of heat transfer through the material per unit…

Q: Q5) Consider a wall-mounted power transistor that dissipates 0.18 Wof power in an environment at…

A: The convective heat transfer is defined as the enhancement of conduction by virtue of convection.…

Q: Q1 A composite house wall is constructed from 1.2 cm layer of fiber insulating board, an 8.0 cm…

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Q: 3 cm thick has a constant temperature of 400 ° C while the temperature of the other surface is kept…

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Q: A cold-storage room is constructed of an inner layer of 11 mm of pine with thermal conductivity of…

A: Given:- Length of pine(thickness) Lp=11mm=0.011m Length of concrete(thickness) Lc = 75mm=0.075m…

Q: b) The fuselage of an aeroplane consists of the following three layers: the outer layer made from…

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Q: Two parts and label (A) & (B) Solve carefully! Question : The roof of a car in a parking lot absorbs…

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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.