ANALISIS VARIASI HELICAL BAFFLE PADA SHELL AND TUBE HEAT EXCHANGER BERBASIS COMPUTATIONAL FLUID DYNAMICS (CFD)

Alat penukar panas memiliki peranan penting di industri terhadap keberhasilan keseluruhan rangkaian proses. Penelitian terhadap desain heat exchanger dilakukan untuk mencapai kinerja heat exchanger yang paling baik dengan memvariasikan jarak baffle dan jumlah baffle. Penelitian dilakukan terhadap kinerja heat exchanger tipe shell and tube heat exchanger dengan variasi jarak baffle jenis helical dan laju aliran massa inlet di sisi shell. Penelitian ini dilakukan secara numerik dengan variasi jarak baffle : 0.15m, 0.1m, 0.075m, dan 0.06m dan variasi laju aliran massa inlet : 0.05kg/s, 0.1kg/s, dan 0.2kg/s. Susunan Tube yang digunakan adalah tipe steggered yang disusun secara triangle. Aliran bersifat parallel-flow dengan model viskos yang digunakan adalah turbulensi model k-ε realizable. Hasil analisa numerik menunjukkan nilai deviasi laju perpindahan panas fluida panas dan fluida dingin sebesar 0.07%. Hasil penelitian menunjukkan variasi jarak baffle 0.06m dengan laju aliran massa inlet fluida dingin 0.2kg/s memiliki nilai koefisien perpindahan panas total yang paling baik dengan nilai 469.05 W/m².K, dan nilai pressure drop paling baik adalah 0.62 pa pada variasi jarak baffle 0.015 m dengan laju aliran massa0.05 kg/s. ================================================================================================================== Heat Exchanger has an important role in industry for successfull processes. The researches of heat exchanger focus on enhancement of heat transfer coefficient. Meanwhile the minimum pressure drop is also required to guarantee the subsequent process. Generally, those to requirements a satisfied by the configuration of helical baffle. This work considers the helical baffle with different distance variation as well as mass flow rate inlet on the shell side. A CFD analysis is implemented for studying the variying distance of 0.15m, 0.1m, 0.075m, and 0.06m and with mass flow rate are 0.05kg/s, 0.1kg/s, and 0.2kg/s. The tube of staggered configuration is in triangular arrangement. In this research, turbulence model of k-ε realizable is used as a viscocity model, in parallel-flow configuration. The results show that the deviation value of heat transfer rate cold fluid and hot fluid is 0.07% refer to energy balance law, and the best value of heat transfer coefficient is 469.05 W/m².K for 0.06 m distance with 0.2 kg/s inlet mass flow rate and the best value of pressure drop is 0.62 Pa for 0.015 baffle distance with 0.05 kg/s inlet mass flow rate