I understand you're looking for detailed information on the , specifically regarding item or problem "16" (likely Chapter 16 or Problem 16).
[ q = U \cdot A \cdot \text{LMTD} ] [ A = \frac{q}{U \cdot \text{LMTD}} = \frac{313,500}{300 \times 40} ] [ A = \frac{313,500}{12,000} = 26.125 , \text{m}^2 ] I understand you're looking for detailed information on
[ \Delta T_1 = T_{h,in} - T_{c,out} = 120 - 80 = 40^\circ C ] [ \Delta T_2 = T_{h,out} - T_{c,in} = 70 - 30 = 40^\circ C ] Here, (\Delta T_1 = \Delta T_2), so LMTD = (40^\circ C) (special case). 000} = 26.125