A airplane layer of coal of thickness together = 1 m experiences uniform volumetric generation at a price of q = 20 W/m3 due to slow oxidation that the charcoal particles. Averaged over a everyday period, the optimal surface of the layer transfers heat by convection come ambient air because that which h = 5 W/m2 ∙ K and also T∞ = 25°C, while receiving solar irradiation in the quantity Gs = 400 W/m2. Irradiation native the setting may it is in neglected. The solar absorptivity and also emissivity that the surface space each together = ε = 0.95.

You are watching: A plane layer of coal of thickness l

\"*\"

(a) create the steady-state kind of the heat diffusion equation because that the layer of coal. Verify that this equation is satisfied through a temperature circulation of the form T(x) = Ts + qL2/2k (1-x2/L2) native this distribution, what deserve to you say about conditions in ~ the bottom surface ar (x = O)? map out the temperature distribution and also label an essential features.

(b) achieve an expression because that the rate of warmth transfer by conduction per unit area at x = L. Applying an energy balance to a control surface around the peak surface the the layer, attain an expression for Ts. Evaluate Ts and T(0) for the prescribed conditions.

See more: 'Bachelor In Paradise' Preview: Alexis Bachelor In Paradise '?

(c) everyday average values of G s and h count on a variety of factors such together time the year, cloud cover, and wind conditions. Because that h = 5 W/m2 ∙ K, compute and also plot Ts and also T (0) as a duty of Gs for 50 ≤ Gs ≤ 500 W/m2. Because that Gs = 400 W/m2, compute and plot Ts and T (0) as a role of h for 5 ≤ h ≤ 50 W/m2 ∙ K.


distribution The native \"distribution\" has several interpretations in the financial world, many of castle pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are amongst the most...

Students also viewed this Mechanical engineering questions


From
the data in Table 15.2, what can you say in general about the proportion of saturated to unsaturated mountain in fat and oils? check out Answer
What can you say if (a) 3x + 4 ? 6x ? 3,(b) 2x + 7 > 13 > 3x ? 4? check out Answer
A resource of irradiate is monochromatic. What can you say about the photons emitted by this source? check out Answer
Verify that this map is an isomorphism: h: R4 M2Ã2 given by view Answer
What can you say about the collection (an in each of the following cases?(a) (b) (c) watch Answer