Answer Happy

After thermal resistance is found use that to find the power
generation to maintain the temperature of 200C. Then
get estimated efficiency. Complete FBD.
Protect Air Contains air maintaned at 200°2. inner part of air fryer made of stainless steel (1=15 whil) diameter.22m and thickness .olm. inner part of Fryer has .02m thick insulator (K=. 035 W/mc). outer temp is "20°º°C. Depth is alm. At = 180°C a thermal resistance inner 1r) X₁ = 22m In R₁ = X₂=23 m 2zKL K=15 W/m/°L L=. IM R₁: in (-²²) outer layer) V₁ = 23 2R (15) (1) X=25 K = 035 w/m³c Liilm R₂= In (125) 27 (1075)/21) R₁ + R₂ = Rrorat 4.7164 x 10²³² + R = 3.796314प ८ fate To maintain air temp at 200°C. Heat transfer rate would be 47.417 b) Heat Flow AT R Q = 180°C 3.7769147 Q = 47.41 J 3.791598- °C/W) Final FBD O R₁ = 4.7164 x 15²³ 02/w R₂= 3.79 1598 °Y/w