I need MATLAb programming for above example . I do not want any theory or numeri

Question

I need MATLAb programming for above example . I do not want any theory or numerical explaination

11. A typical 1 -in solid wood core door exposed to winter conditions has the characteristics shown in the accompanying table. Assume an inside room temperature of 70°F and an out- side air temperature of 20°F, with an exposed area of 22.5 ft2. (a) Determine the inside and outside temperatures of the door's surface. (b) Determine heat loss through the door. Resistance U-factor hr-ft-F/Btu Btu/hr-ft-.F Items 1. Outside film resistance (winter, 15-mph wind) 2, 1 -in solid wood core 3. Inside film resistance (winter) 0.17 0.39 0.68 5.88 2.56 1.47

Explanation / Answer

(a) The MATLAB code is

%Defining input variables

%Air inlet and outlet temperatures

Tain = 70;

Taout = 20;

%Resistances

Rin = 0.68;

Rout = 0.17;

Rw = 0.39;

%Area of the door surface

A = 22.5;

%Inside temperature of the door's surface

Tin = Tain - (Tain - Taout) * Rin / (Rin + Rw + Rout)

Tout = Tout + (Tain - Taout) * Rout / (Rin + Rw + Rout)

The answers are

Tin = 42.581 F

Tout = 26.855 F

(b) The MATLAB code for calculating heat loss through the door is

Q = (Tain - Taout) * A / (Rin + Rw + Rout)

The answer is

Q = 907.258 BTU / hr

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