A 10 ft long double pipe heat exchanger consisting of a 1 in sch40 (1.315 in OD, 1.029 in ID) inner pipe within a 4 in sch 40(3.998 in ID) outer pipe uses chilled water to cool hot glycerin(the water flows in the annulus and glycerin in the inner pipe).The pipes are constructed of AISI 302 stainless steel. The meanvelocities of the water and glycerin are 4 ft/s and 1.3 ft/s,respectively. If the average bulk temperatures of the water andglycerin are 45 â—¦F and 180 â—¦F, respectively, compute the overallheat transfer coefficient based on the outer area of the 1 indiameter pipe. Neglect fouling.
