Calculation of Heat Exchanger as Demineralized Water Cooler in C3W

Sri Wuryanti, Rama Prasetyo H.

Abstract: The cooling system in a steam power plant is a closed-process cooling system that uses a heat exchanger with a cheap heat receiver transfer medium such as seawater. The closed cooling system heat exchanger has problems, namely frequent tube leaks and decreased effectiveness. This condition is fascinating to re-analyze by studying and calculating essential variables in the heat exchanger. Heat Exchanger (HE), a demineralized water cooler in the C3W system, uses a shell and tube heat exchanger. This heat exchanger, on the shell side, is passed by demineralized water fluid with an input temperature of 37 ? C and an output temperature of 30 ? C, and on the tube side, is passed by seawater fluid with an input temperature of 28 ? C and an output temperature of 31 ? C. The design standard will refer to the dirt factor value. HE is critical in the process that occurs in the plant, so it needs good design. This design will be carried out by calculation and simulation methods. The design standard refers to a dirt factor value of 0.0015 and a pressure drop of 10 psi (TEMA standard). The design calculation produces a dirt factor value of 0.0015 with a pressure drop of 6.32 psi (shell side) and 3.17 psi (tube side).

Keywords: C3W system, cooler, demineralized water, heat exchanger, seawater