ANALISIS KOROSI PADA RUANG BAKAR INERT GAS GENERATOR PADA MT. SAMBU

Agus Tri Handoko, 2018, NIT: 50134925. T, “Corrosion Analysis On The Inert Gas Generator Combustion Chamber On MT.Sambu”, Technical Thesis, Diploma IV Program, Merchant Marine Polythecnic Semarang, Material Adviser (I): Dwi Prasetyo, MM, M.Mar.E. Methodologi and Writing Adviser (II): Nur Rohmah, S.E., M.M. Inert gas generator is a device similar to boiler, where fuel is burned to make the flue gas containing oxygen less than 5%. Damage to the combustion chamber inert gas generator caused by several types of corrosion. Including: (1) intergranular corrosion, (2) crevice corrosion, (3) pitting corrosion (4) erosion corrosion. in MT. Sambu caused by intergranular corrosion corrosion factor so that the combustion chamber undergoes a change of shape (perforated) that resulted in sea water as a cooling medium on the wall scrubber into the combustion chamber so that there is no burning in the combustion chamber inert gas generator. The purpose of this research is, to determine what factors are causing the corrosion in the inert gas generator combustion chamber on MT. Sambu moreover, this research aims to determine what efforts are made to the inert gas generator combustion chamber is not quickly exposed to corrosion in the MT. Sambu. This research uses qualitative descriptive method and using data analysis technique strengths, weaknesses, opportunities, and threats (SWOT) is systematic identification of various factors to formulate strategy. Data collection is done by interview, observation, documentation, by observing at the overhaul time on MT. Sambu. After identifying the factors which causing acceleration of corrosion in the inert gas generator combustion chamber, so that causing corrosion on inert gas generator combustion chamber on MT. Sambu is: the fresh water flushing the valve is damaged, and the result showed factors which caused corrosion in the inert gas generator combustion chamber are the fresh water flushing was damaged and the less cooling air conditioning pressure of cooling jacket. The efforts which are done in order to make the inert gas generator combustion chamber corrosion on the MT. Sambu has good performance are to make the schedule for maintaining the fresh water flushing valve regulary. After stopping the operation of inert gas generator must be maintained regulary. Regular maintenance at fresh water flushing valve, and at the scrubber pump. Keywords: Corrosion, Inert Gas Generator, Combustion Chamber

Vaistinė augalinė žaliava natūraliose augavietėse ir pramoninėse plantacijose

Vytauto Didžiojo universiteta

AN IMPROVEMENT OF ARJUNA 1.0 CONVEYOR SYSTEM FOR 3D IRRADIATION

An improved design of the conveyor system of Arjuna 1.0 electron accelerator for 3D object irradiation has been done. The penetration of low energy electrons is less than 1 cm in the surface, causing a challenge for the irradiation process for sterilization of 3D objects. We design a conveyor that can be rotated 360o to irradiate objects evenly. The dimension of this conveyor is 1750 x 600 x 800 mm and the maximum diameter of the object is 7 cm. Based on the Frame Bending Stress analysis to calculate the strength of the conveyor frame, it is shown that the maximum displacement is only 0.029 mm, which is very small so it will cause no disturbance to power transfer from the motor to the conveyor. The normal stress (Smax) is 3.926 MPa and the bending stress for Smax (Mx) and Smax (My), are 2.391 MPa and 3.925 MPa respectively. We also calculate the stress analysis of the 3 mm-thickness of the motor mount and found that the Von-Misses Stress, first, and third Principal Stress are 4.425 MPa, 5.01 MPa, and 1.95 MPa respectively. These results confirm that the design and the material used for the conveyor are safe because the stress is very low than the material’s yield strength which is 207 MPa. The power needed for this conveyor is 0.01724 kW, with a maximum speed is 880 rpm. The new model of 3D conveyor has been constructed and can be implemented to ARJUNA 1.0 to irradiate objects on all its surface

Proceedings of the 3rd International Conference on Community Engagement and Education for Sustainable Development

This proceeding contains articles on the various ideas of the academic community presented at The 3rd International Conference on Community Engagement and Education for Sustainable Development (ICCEESD 2022) organized by the Universitas Gadjah Mada, Indonesia on 7th-8th December 2022.  ICCEESD is a biannual forum for sharing, benchmarking, and discussing HEI’s activities in developing Education for Sustainable Development towards community engagement. Education for Sustainability as a teaching strategy for resolving community challenges through formal, informal, or non-formal education is expected to benefit from various community service best practices by academics, researchers, and students. The 3rd ICCEESD has “Strengthening Education for Sustainability Towards Better Community Engagement” as its theme this year. It is expected that the 3rd ICCEESD will provide a forum for the presenters and participants to exchange best practices, policies, and conceptual implementation of Education for Sustainability towards better community engagement and explore ideas to address community needs.  Conference Title: 3rd International Conference on Community Engagement and Education for Sustainable DevelopmentConference Theme: Strengthening Education for Sustainability Towards Better Community EngagementConference Acronyms: ICCEESD 2022Conference Date: 7th-8th December 2022Conference Location: Grand Rohan Jogja Yogyakarta, IndonesiaConference Organizer: Universitas Gadjah Mada, Indonesi