Consider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = 50 W/m-K and a thickness L = 0.35 m, with no internal heat generation.
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- Discuss the modes of heat transfer that determine the equilibrium temperature of the space shuttle Endeavour when it is in orbit. What happens when it reenters the earths atmosphere?What are the important modes of heat transfer for a person sitting quietly in a room? What if the person is sitting near a roaring fireplace?2.34 Show that the temperature distribution in a sphere of radius . made of a homogeneous material in which energy is released at a uniform rate per unit volume , is
- Consider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = 60 W/m-K and a thickness L = 0.4 m, with no internal heat generation. T1- -T2 L Determine the heat flux, in kW/m?, and the unknown quantity for each case. Case T1(°C) T2 (°C) dT/dx(K/m) qf (kW/m²) 1 50 -20 -30 -10 70 i 160 40 -80 5 30 200 4-Consider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = 40 W/m-K and a thickness L = 0.3 m, with no internal heat generation. T1 -T2 L Determine the heat flux, in kW/m?, and the unknown quantity for each case. Case T1(°C) T2(°C) dT/dx(K/m) q (kW/m?) 1 50 -20 -233.333 9333.32 2 -30 -10 66.667 75466.67 3 70 117.85 160 6400 4 63.85 40 -80 3200 5 -30.15 30 200 8000Consider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = 40 W/m-K and a thickness L = 0.3 m, with no internal heat generation. -T2 L Determine the heat flux, in kW/m², and the unknown quantity for each case. Case T1(°C) T2(°C) dT/dx(K/m) q (kW/m?) 1 50 -20 i i 2 -30 -10 i i 3 70 i 160 i 4 i 40 -80 i 5 i 30 200 i
- Consider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = W/m-K and a thickness L = 0.4 m, with no internal heat generation. 60 T1 -T2 L Determine the heat flux, in kW/m?, and the unknown quantity for each case. Case T1 (°C) T2 (°C) dT/dx(K/m) 9 (kW/m²) 1 50 -20 i i 2 -30 -10 i i 3 70 i 160 i 4 i 40 -80 i i 30 200 iConsider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = 40 W/m-K and a thickness L = 0.4 m, with no internal heat generation. -T2 L Determine the heat flux, in kW/m2, and the unknown quantity for each case. Case T1(°C) T2(°C) dT/dx(K/m) 9% (kW/m²) 1 50 -20 i i -30 -10 i i 3 70 i 160 i 4 i 40 -80 i i 30 200 i LOConsider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = 40 W/m•K and a thickness L = 0.3 m, with no internal heat generation. L Determine the heat flux, in kW/m2, and the unknown quantity for each case. Case T1(°C) T2(°C) dT/dx(K/m) (kW/m²) 1 50 -20 i i 2 -30 -10 i 3 70 i 160 i 4 i 40 -80 i i 30 200 i
- 0/1 The thermal conductivity of Aluminum material at127°Cand 527 C are 240 and 218 W/m. K, respectively. Determine ko and B, constants for the used material. k=ko (1 + BT) is assumed with T in °C. 0/2 Heat is generated in a slab of 120 mm thickness with a conductivity of 200 W/m K at a rate of 106W/m. Determine the temperature at the mid and quarter planes if the surface of the solid on both sides are exposed to convection at 30°C with a convection coefficient of 500 W/m K. Also find the heat flow rate at these planes and the temperature gradients at these planes. 0/3 1. Determine the heat flow for (i) rectangular fins and (ii) triangular fin of 20 mm length and 3 mm base thickness. Thermal conductivity = 45 W/m K. Conwection coefficient h= 100 W/m K, base temperature = 120°C surrounding fluid temperature = 35°C. Determine also the fin effectiveness. 2. A circumferential fin on a pipe of 50 mm OD is 3 mm thick and 20 mm long. Using the property values and other parameters in 1,…Q: A large plane wall of thickness (L= 0.3 m), thermal conductivity (k = 40 W/m-°C), and surface area 0.4 m2. The left side of the wall is maintained at a constant temperature of 70°C while the right side loses heat to the surrounding air with heat flux q' expressed by: 1200k q = k+20L A- Find a relation to determine the variation of temperature in the wall. B- Determine the rate of heat transfer through the wall. C- Determine the temperature at the right side of the wall. wall T1= 70 °C L= 0.3mConsider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = 40 W/m-K and a thickness L = 0.3 m, with no internal heat generation. T2 L Determine the heat flux, in kW/m?, and the unknown quantity for each case. T1 (°C) T2(°C) dT/dx(K/m) 9 (kW/m?) Case 1 50 -20 i i 2 -30 -10 i 70 i 160 i 40 -80 i 5 i 30 200 i