Temperature at Junction

Temp at junction 2K K, &,A Hi H2 100°C T = ? steady state H,=H2 30°C H,= KA(100-T) l H2= 2k 2A (T-30) 1/2 KA (100-T) = 8 KA (T-30) P l 100-T=87-240 340 = 9T T= 340 = . 37.7°C a 100°C ? A KI K2 3k A o'l l =? ans: K, K2 =1:3 K1 =1/3 K2 K2= 3k,

K,A (100-T) 3K A (T-0) = a 1 100-T =3T 4T=100 T= 25°C 90c H, K,A,P 2K,Ail 20°C T H3 K,2A,I H2 H1+H2+H3= 70°C Ecurrent at junction=0 KA (T-90) K(2FDKK2A(T-70) + f + 2KA(T-20) =0 h T=90+2(T-T0)+2(T-20)=0 T-90+2T-140+2T-40=0 5T=90+140+40 ST= 270 T= 72 270 - 54°C S