ANALISIS PENGARUH PENAMBAHAN PLENUM CHAMBER PADA DESAIN SISTEM VENTILASI DAN SALURAN UDARA KAMAR MESIN KAPAL FERRY RO-RO 100 M

Abstract

The engine room ventilation system is very important to maintain the temperature in the comfort zone of the engine room. Plenum chambers are mostly applied to ventilation systems and air ducts in land-based buildings. Numerical method was used to investigate the flow characteristics with the addition of plenum chamber in the engine room air duct using Ansys 18.1 software. The air capacities obtained were 85,095 m3 /h for the main engine, 14,720 m3 /h for the auxiliary engine, and 9,501 m3/h for the emergency auxiliary engine. The air duct design separates the portside and starboard side, resulting in a blower capacity of 60,000 m3/h. The 3D modeling design included in the analysis of the Computational Fluids Dynamics (CFD) method shows that the Plenum chamber can help homogenize the flow. With the k-epsilon turbulence model, visualization of streamline velocity, velocity before and after entering the plenum chamber and visualization of pressure along the air duct were obtained. The results with the addition of plenum chamber the air flow rate at inlet 1 increased by 0.0604 kg/s, the average velocity increased by 0.11 m/s and the maximum velocity increased by 1.006 m/s. And with the addition of the plenum chamber, the turbulence kinetic energy (TKE) value ranges from 1.98e-03 m2/s2 to 1.82e+02 m2/s2, smaller than the TKE value of the air duct without a plenum chamber, which ranges from 1.76e-03 m2/s2 to 1.97e+02 m2/s2