Strength of polymeric foam composite reinforced oil palm empty fruit bunch fiber subjected to impact load M Yani, M A Siregar, B Suroso, Arnita Iop Conference Series Materials Science and Engineering, 2019 The subjects of this study were polymeric foam (PF) composites reinforced oil palm empty fruit bunches (OPEFB) fiber to dynamic load. OPEFB is waste of Palm Oil Mill which large number. This waste is seen has good potential to be harnessed and developed to become the engineering materials. This composite is processed with mixing of polyurethane (PU) and polyester resin. The paper aims to find the density of PF composite reinforced OPEFB fiber and to investigate the mechanical properties due to dynamic load. The specimens were prepared following the ASTM D1621-00 impact test standard. The method of making the test specimen is done by casting. The ratio of PU and mixing of polyester resin and OPEFB is 45 %: 65%. The results are gotten density 630 kg/m3, at a level test of 0.5 m the magnitude of the tension that occurs is 226.68 kPa, the average energy absorbed is 75.20 Joule and at the level test of 1m, the magnitude of the tension is 261.43 kPa, the absorbed energy is 184, 68 Joule.
Convective heat transfer of nanofluids TiO2/Thermo Oil XT 32 in concentric tube heat exchanger B Suroso, S Kamal, B Kristiawan, H Irawansyah, B S Wibowo, M Yani Iop Conference Series Materials Science and Engineering, 2019 This research was conducted to examine the heat transfer characteristic of nanofluids TiO2/Thermo XT 32 oil on a concentric tube heat exchanger. TiO2 nanoparticles with nominal diameter of 21 nm were dispersed in Thermo XT 32 oil as base fluid at three different particles concentration of 0.1%, 0.3%, and 0.5%, respectively. A straight horizontal stainless-steel tube of 1.2 m length, 0.012 m inner diameter, and 0.022 m outer diameter were used as a test section. Collecting data by varying the temperature of the heat transfer nanofluids and nanoparticle volume fraction. Nanofluids prepared using the method of two steps without the addition of a surfactant by using a magnetic stirrer for 1 hour then ultrasonic cleaner for 3 hours. The results of research conducted, the coefficient convection heat transfer of nanofluids TiO2/Thermo XT 32 oil increases along with the addition of fraction volumes; this is due to the increased thermal conductivity of the fluid as well with the rise of temperature against nanofluids TiO2/Thermo oil XT 32. So it is very worthy of nanofluids applied in industries related to heat transfer processes.
