Optimization of Heat Transfer Area and Steam Requirement in Multiple Effects Evaporator for Concentration of Juice in Sugar Factory

<strong>ABSTRACT.</strong> In maintaining the existence of sugar factories that exist and are still actively operating in Indonesia, efforts should be made to carry out intensification extensification. terms process, it is necessary periodically evaluate performance process tools, especially those require utilities so effective efficient. The making passes through six stages, namely: milling, purification, evaporation (evaporation), cooking, screening, packaging processes or final stage. a crucial determines success entire because juice concentrated from 11% 64%. evaporator designed use multiple effect increase value steam economy. research objective optimize number effects minimum total cost. To achieve this goal, survey factory obtain valid data. Furthermore, mathematical model compiled based on principle mass heat balance then software program optimization solution can done accurately. conclusions drawn as follows: for flow rate 125,000 kg/hour with concentration feed temperature 100<sup>o</sup>C, optimum conditions obtained annual production cost IDR. 22,090,361,779.00 which owned by 4 effects, area = 2,443.81 m<sup>2</sup>, economy 3.98 demand 26,028.2 kg/hour. common Indonesia.