... and Eqs. 11 .22 and 11 .36a yield()c,o c,ih,i c,iTT 1 exp NTUTTε−==−−− (1) From Eq. 11 .1, () ()toochR 11 1 UA hA L hAηη′=++(2)With ()72DiRe 4m/ D 0 .12 kg /s/ 0.05m 19 6.4 10 ... = 4 .16 × 10 4 W/K( 410 K) = 1. 71 × 10 7 W. Hence, ε = (q/qmax) = (1. 254 × 10 7 W /1. 71 × 10 7 W) =0.735. With Cmin mixed and Cmax unmixed, Eq. 11 .35b gives NTU = 1. 54 and ()()422hminhA ... 19 0 W/K and Cmax = Cc = 420 W/K.Hence()()maxminh,ic,iqCTT190W/K10030K13,300W=−=−= and ε=q/qmax = 0.5 71. With Cr = Cmin/Cmax = 0.452 and using Eq. 11 .30b,minrrUA 111 0.5 711 NTUlnln1.00CC1C10.45 210 .5 710 .45 21 εε−−====−−−×−so...