35 research outputs found
Analisa Konduksi Panas Dua Dimensi pada Functionally Graded Materials (FGMs) Menggunakan Metode Elemen Hingga (FEM)
No full textSeiring dengan kemajuan dunia industri, seperti industri penerbangan,
kesehatan, kimia, elektronik, dan lain sebagainya, kebutuhan akan material
komposit semakin meningkat untuk memenuhi permintaan pasar. Hal tersebut
dikarenakan material komposit memiliki rasio beban dan berat yang tinggi dan
ketahanan fatik yang baik. Namun demikian, keperluan terhadap material yang
memiliki sifat-sifat ketahanan terhadap temperatur tinggi, ketahanan terhadap
oksidasi juga meningkat. Functionally Graded Materials (FGMs) adalah kelas
material maju dari material komposit yang memiliki sifat material yang bervariasi
dari satu titik ke titik lainnya. Sifat tersebut terbentuk dari dua atau lebih fase
konstituen dengan gradasi dan sifat material khusus. Pada penelitian ini akan
dilakukan analisis dua dimensi konduksi panas dalam FGMs menggunakan
Metode Elemen Hingga (FEM). Tiga model gradasi sifat FGMs diteliti dalam
studi yaitu Polinomial, Eksponensial dan Trigonometri. Respon temperatur dari
FGMs dengan menggunakan ketiga model gradasi tersebut dibandingkan dan
dianalisa. Distribusi temperatur optimum tiga model yang dibangun dengan
perangkat lunak ANSYS.
Jika ditinjau dari variasi FGMs yang digunakan untuk permasalahan
konduksi panas, variasi trigonometri dihasilkan hasil yang baik. Misalkan pada
geometri silinder berlubang, nilai temperatur rata-rata yang didapat sebesar
�=30,3447 . Pada geometri persegi sebesar �=46,0835 . Dan pada
geometri rumit sebesar �=25,2129 . Kemudian jika ditinjau dari performa,
pada geometri silinder berlubang variasi kuadratik dengan jumlah nodal 1379,
didapatkan waktu pengerjaan selama 434,6 s. Pada geometri silinder berlubang
variasi eksponensial, waktu pengerjaan selama 435 s. Dan pada geometri silinder
berlubang variasi trigonometri, waktu pengerjaan selama 444 s. Pada geometri
persegi, didapatkan waktu pengerjaan yang rata-rata sama yakni selama 37 s. Dan
pada geometri rumit didapatkan waktu pengerjaan yang rata-rata sama juga yakni
selama 35 s. Dan yang terakhir jika ditinjau dari efisiensi, hasil dari FEM sangat
mendekati hasil dari metode analitik. Misalkan pada geometri silinder berlubang
variasi kuadratik dengan jumlah nodal 761, didapatkan rata-rata nilai error sebesar
0,0019. Pada geometri silinder berlubang variasi kuadratik dengan jumlah nodal
883, rata-rata nilai error sebesar 0,0013. Dan pada geometri silinder berlubang
variasi kuadratik dengan jumlah nodal 1379, rata-rata nilai error sebesar 0,0012.
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Along with the progress of the industrial world, such as aviation industry,
healthcare, chemical, electronics, etc., the n
eed for composite materials is
increasing to meet market demand. This is because composite materials have a
high load and weight ratio and good fatigue resistance. However, the need for
materials with high temperature resistance properties, resistance to o
xidation also
increases. Functionally Graded Materials (FGMs) are advanced material classes of
composite materials that have material properties that vary from one point to
another. These properties are formed from two or more constituent phases with
grada
tions and special material properties. In this research will be conducted two
-
dimensional analysis of heat conduction in FGMs using Finite Element Method
(FEM). Three models of gradation of FGMs properties were studied in the study
of Polynomial, Exponenti
al and Trigonometry. The temperature response of
FGMs using the three gradation models is compared and analyzed. The optimum
temperature distribution of three models built with ANSYS software.
When viewed from the variations of FGMs used for heat conduction
problems, trigonometric variations yielded good results. Suppose that in the
cylinder geometry of the hole, the average temperature value obtained for
T = 30,3447 oC. On a square geometry of T = 46,0835 oC.
And on the complicated geometry of T = 25,2129 oC.
Then, in terms of performance, the
cylindrical geometry of quadratic variation with the number of nodal 1379,
obtained the processing time for 434.6 s. In hollow cylindrical geometry of
expone
ntial variation, the processing time is 435 s. And on the cylinder geometry
of the variation of trigonometry, the working time is 444 s. In rectangular
geometry, the average working time is reached for 37 s. And in the complex
geometry obtained the average
workmanship time is also equal for 35 s. And
finally, in terms of efficiency, the results of FEM are very close to the results of
the analytic method. Suppose that in the cylindrical geometry of quadratic
variation with the number of nodal 761, obtained a
n average error value of
0.0019. In the cylindrical geometry of quadratic variation with the numeral
number 883, the average error value is 0.0013. And on the cylindrical geometry of
quadratic variation with the numal number 1379, the average error value is 0.0012
PERFORMA MATERIAL DALAM MENYERAP PANAS DI RUSUN POLITEKNIK KELAUTAN DAN PERIKANAN SORONG
No full textMaterial peredam panas merupakan material alami atau sintetis yang diaplikasikan untuk menahan temperatur tinggi. Pada aplikasi sipil, guna mendapatkan kenyamanan dalam melakukan aktivitas sehari-hari material peredam panas banyak dipilih oleh karena kemampuan material tersebut. Di alam, banyak terkandung material peredam panas misalkan tanah, bebatuan mineral, dan lain sebagainya. Raw material tersebut, nantinya akan diolah atau dimanfaatkan langsung untuk diaplikasikan sebagai material peredam panas. Kota sorong merupakan sebuah kota yang memiliki kondisi paling kritis dan telah menjadi tantangan penting bagi banyak kota dalam permasalahan pulau panas perkotaan. Kondisi tersebut memacu timbulnya sebuah fenomena Urban Heat Island (UHI). Dalam upaya untuk mengurangi panas yang ditimbulkan, digunakan berbagai macam material untuk diaplikasikan di beberapa hal. Material tersebut diantaranya Material Beton Cor, Material Aspal, Material Tanah. Dalam penelitian ini, performa material dalam mengurangi panas ditentukan untuk ketiga material tersebut. Alat ukur yang digunakan adalah alat ukur yang umum digunakan untuk mengukur temperatur. Pengukuran dilakukan mulai dari pagi sampai malam. Hasil yang didapatkan bahwa material beton cor memiliki performa lebih baik dibanding dengan material jenis lain jika diaplikasikan sebagai atap dalam mengurangi panas. Sedangkan material aspal merupakan material yang baik jika diaplikasikan sebagai material jalan. Dengan temperatur rata-rata yang dihasilkan masing-masing material pagi = 〖32.5〗^0 C, siang = 〖60.2〗^0 C, sore = 〖34.7〗^0 C, dan malam = 〖31.0〗^0 C dan pagi = 〖30.0〗^0 C, siang = 〖33.4〗^0 C, sore = 〖29.4〗^0 C, dan malam = 〖28.5〗^0 C.</jats:p
Material Performance to Reduce the UHI (Urban Heat Island) Phenomenon at Deo Airport, Sorong City
No full textDomine Eduard Osok Airport is a Class I Airport in the city of Sorong which is experiencing quite rapid development. This fairly rapid development has made airport managers think of ways to be able to provide maximum service to airport users. One of these services is to reduce the occurrence of the Urban Heat Island (UHI) phenomenon in the airport area by placing several types of materials around the airport. Several types of heat-absorbing materials are natural or synthetic materials that are used to withstand high temperatures. Nature provides a choice of materials that can be applied in this effort. Raw materials contained in nature will later be processed or used directly as an effort to reduce heat. The city of Sorong is a city that has problems with the occurrence of the UHI phenomenon because recently it has experienced an increase in population. To reduce the heat generated, various materials are used to be applied. These materials include Cast concrete, Asphalt, Soil, and Paving Materials. In this study, the material performance in reducing heat is determined for the four materials. The measuring instrument used is a measuring instrument commonly used to measure temperature. Measurements were made from morning to night. The results obtained are that cast concrete material has better performance compared to other types of materials when applied as a heat-absorbing material in buildings. Meanwhile, paving material is a good material if applied as a road material. With the average temperature produced for each material morning=25.20C, afternoon=26.20C, afternoon=26.60C, and night 25.90C and morning=32.70C, afternoon=33.90C, afternoon=29.00C, and night 28.8 0C
Effect of High Temperature Heating on Chemical Compounds in Magnesium Composite Materials
No full textThe development of magnesium composite-based seawater battery anode technology is actively pursued, especially in its ability to transmit and store electrical energy. However, many overlook the possibility that significant temperature changes during the process may lead to chemical compound alterations, potentially affecting the battery's performance. Therefore, this research examines the changes in chemical compounds in magnesium composite-based seawater battery anodes caused by high temperatures. In this study, the synthesis process of magnesium composite material composed of MgAlSnMn with variations of Manganese (wt.-%) 14.8, 15, 15.2, 15.4, 15.6. Then it was milled for 60 minutes. Next, the materials were pelletized using a manual compacting machine with a diameter and compressive strength of 10 mm and 150 kg/cm2 respectively. After that, all materials were sintered at 7500C with a muffle furnace for 60 minutes. In this study, XRD equipment was utilized to determine chemical compound changes. The results indicate that magnesium composite materials undergo significant chemical compound alterations at high temperatures, including MgO (Magnesium Oxide Periclase), Al18Mg3Mn2, and the remaining Al elements. This could potentially disrupt the performance of seawater batteries when applied. It is hoped that further research will be conducted in the future to enhance the quality and performance of the product
Analysis of the Mechanical Properties of Natural Composites Matoa Tree Wood as the Foundation for Environmentally Friendly House Piles
No full textComposite materials, in simple terms, are materials that have a multi-phase system composed of reinforcing materials and matrix materials. Composite materials are divided into two types, namely synthetic composite materials and natural composite materials. Wood is a natural composite material consisting of a reinforcement and a matrix. The wood of the matoa tree (Pometia vinnata) is known for its good mechanical strength. The comparison of compressive mechanical strength in this study was conducted on matoa wood and ironwood tree wood (eusideroxylon zwageri). This was performed as supporting data in the discussion of natural composite materials of matoa tree wood as the foundation for environmentally friendly house piles. The results obtained were matoa wood and ironwood, respectively A1 = 6.07e^(-07) MPa, A2 = 1.11e^(-06) MPa, and A3 = 2.09e^(-06) MPa and B1 = 1.17e ^(-06) MPa, B2 = 2.13e^(-06) MPa, and B3 = 4.02e^(-06) MPa. These results indicated that the resistance to mechanical compression test of ironwood tree was greater than matoa tree. However, when it was seen based on the perspective of the impact on the environment, Matoa tree has environmentally friendly properties that are effective and efficient. This is supported by the nature of the matoa tree which is easy to cultivate and its roots do not damage other plants
KUAT TARIK BAJA TULANGAN POLOS (STUDI KASUS: PT. GHODY BIMANTARA MANDIRI)
No full textPT. Ghody Bimantara Mandiri adalah perusahaan yang bergerak di bidang pekerjaan secara umum, mulai dari perencanaan sampai kepada pelaksanaan dan bergerak di semua pekerjaan proyek konstruksi, baik bangunan gedung maupun bangunan sipil. Dalam sebuah pengerjaan pekerjaan sipil, baja tulangan banyak diaplikasikan terutama baja tulangan polos. Dalam salah satu pekerjaan, terdapat sebuah permasalahan yang membuat besi beton polos tersebut harus diujikan ulang guna mengetahui kualitas besi beton yang digunakan. Peneliti bertujuan untuk membantu menganalisis kualitas besi beton polos yang digunakan oleh perusahaan untuk mengerjakan salah satu proyek pembangunan sebuah tempat pengolahan limbah. Dalam penelitian ini, sampel yang digunakan diambil dari sampel baja tulangan yang digunakan dalam kegiatan proyek pembangunan WWTP (Wastewater Treatment Plant) PT. Etika Dairies Indonesia, pembangunan pasar modern, dan renovasi rumah. Selanjutnya dilakukan pengujian sifat mekanis yaitu pengujian tegangan leleh, pengujian kekuatan tarik dan pengujian regangan terhadap masing-masing benda uji. Kemudian dilakukan uji kesesuaian masing-masing sampel berdasarkan persyaratan SNI 2052-2017. Hasil menunjukkan nilai kuat tarik pada masing-masing sampel yang didapat yakni 600,86 , 597,99 , dan 598,84 . Hal tersebut menunjukkan sampel yang diujikan menggunakan uji tarik telah memenuhi standar SNI 2052-2017, sehingga layak digunakan untuk proyek yang akan dikerjakan.</jats:p
IDENTIFIKASI TERJADINYA OVERFLOW PADA FUEL OIL PURIFIER DI MT. OLYMPUS 1
No full textABSTRAKSI
Rezza Satria Putra, NIT : 52155842.T, 2019, “Identifikasii Terjadinya Overflow pada FO
Purifier di MT. Olympus 1”, skripsi Program Studi Teknika, Program Diploma
IV, Politeknik Ilmu Pelayaran Semarang, Pembimbing I: Sarifuddin, M.Pd,M.
Mar.E. , Pembimbing II: Henny Wahyu., M.Pd
Purifier diatas kapal merupakan salah satu mesin bantu yang memiliki peranan
sangat penting untuk memisahkan bahan bakar dari air, lumpur dan kotoran. Tujuan
penelitian ini adalah untuk membahas hal-hal yang menyebabkan terjadinya overflow pada
FO purifier, mengetahui dampak yang menyebabkan overflow purifier dan upaya
mengatasi terjadinya overflow pada purifier. Kegunaan dari bahan bakar yang sudah bersih
ini adalah untuk mendukung pengoperasian dari mesin diesel dalam menghasilkan
pembakaran yang sempurna, sehingga kerusakan pada mesin akibat penggunaan bahan
bakar yang tidak bersih dapat dikurangi.
Dalam hal ini penulis menggunakan metode Fish bone dan Fault tree analysis,
dimana metode ini adalah untuk mencari sebab-akibat dari permasalahan dan mengambil
beberapa faktor yang lebih dominan untuk dianalisa menggunakan FTA untuk mencari akar
permasalahan dan bagaimana mengatasinya.
Hasil yang diperoleh dari penelitian ini menunjukan bahwa penyebab terjadinya
overflow adalah terjadi kotornya bowl, kebuntuan pada nozzle pada bowl body dan
rusaknya Main Seal Ring dapat berdampak buruk terhadap kerja dari purifier. Ini ditandai
dengan tidak normalnya proses purifikasi pada MFO purifier yang mengakibatkan bahan
bakar bersih tidak keluar melalui pipa keluaran bahan bakar bersih, yang sering disebut
juga dengan overflow. Untuk mengatasi permasalahan diatas cara melakukan pembersihan
serta perawatan secara periodik/berkala terhadap bowl dan nozzle tersebut betul-betul
dijaga terutma kebersihannya dari lumpur pada bowl dan kerak-kerak yang dapat
menimbulkan kebuntuan pada nozzle, apabila terjadi kebuntuan pada nozzle, apabila terjadi
kebuntuan maka segeralah dibersihkan dan dirawat, dan mengganti Main Seal Ring dengan
yang baru sebelum jam kerjanya.
ABSTRACT
Rezza Satria Putra, NIT: 52155842.T, 2019, "Identification of Overflow Occurrence in
FO Purifier in MT. Olympus 1 ", Mini thesis of the Technical Study Program,
Diploma IV Program, Semarang Shipping Science Polytechnic, Advisor I:
Sarifuddin, M.Pd,M. Mar.E. Advisor II: Henny Wahyu., M.Pd
Purifiers on board are one of the auxiliary machines that have a very important role
to separate fuel from water, mud and dirt The purpose of this study is to discuss things that
cause overflow in the FO purifier, find out the impact that causes overflow purifier and
efforts to overcome the occurrence of overflow in the purifier. The usefulness of this clean
fuel is to support the operation of the generator engine in producing perfect combustion, so
that damage to the engine due to the use of non-clean fuel can be reduced
Considering the importance of function FO Purifier for quality of Lubricating main
engine so this machinery must be treat as well as procedure. In this case the author uses the
method fishbone and fault tree analysis, where this method to find the cause and effect of
the problems and factors more dominant to be analyzed by using the analysis of fault trees
to find out and how to overcome them.
The results obtained from this study show that the cause of overflow is bowl
dirtyness, deadlock on the nozzle in bowl body and wear of the Main Seal Ring can
adversely affect the work of the purifier. This is indicated by the abnormal purification
process in the MFO purifier which results in clean fuel not coming out through the clean
fuel output pipe, which is often referred to as overflow. To overcome the above problems
how to do cleaning and maintenance periodically / periodically against th
e bowl and nozzle is really maintained especially cleanliness of the mud in the
bowl and crust which can cause deadlock on the nozzle, if there is a deadlock at the nozzle,
if there is a deadlock then immediately cleaned and treated, and replaced the Main Seal
Ring with new ones before working hour
Sebaran Suhu Permukaan Laut Teluk Bone Pada Tahun 2021 Menggunakan Citra Satelit Terra Modis
No full textABSTRAKSuhu permukaan laut merupakan salah satu parameter oseanografi yang sangat penting bagi kehidupan organisme di lautan. Sama seperti daratan, kehidupan laut juga memerlukan panas untuk dapat menjaga keberlangsungan hidup. Oleh karena pentingnya suhu permukaan laut, penelitian ini bertujuan untuk mengetahui sebaran suhu permukaan laut dengan menggunakan citra satelit Terra Modis pada perairan Teluk Bone secara spasial dan temporal. Data yang diolah merupakan data suhu permukaan laut tahun 2021 yang diperoleh dari sensor satelit Terra MODIS level-3 yang diunduh dari NASA (OCEAN COLOR atau link http://modis.gfsc.nasa.gov/data, kemudian pengolahan data citra dilakukan menggunakan perangkat lunak SeaDas dan ArGIS dengan tahap pengambilan data dengan studi kasus di Perairan Teluk Bone. Berdasarkan hasil penelitian, sebaran suhu permukaan laut tertinggi berada pada November berkisar antara 29,36º-34,52ºC dengan nilai rata-rata 30,83ºC dan suhu terendah berada pada Agustus berkisar antara 26,64º-32,32ºC dengan rata-rata SPL 28,70ºC. Hasil tersebut menunjukkan bahwa sensor satelit Terra MODIS, telah memberikan hasil baik pada data suhu permukaan laut selama tahun 2021. Tiap bulan suhu permukaan laut mengalami kenaikan dan penurunan, hingga puncaknya masing-masing terjadi pada bulan November dan Agustus.Kata Kunci: sebaran suhu permukaan laut, suhu,Teluk Bone, Terra MODISABSTRACTSea surface temperature is one of the most important oceanographic parameters for the life of organisms in the oceans. Just like land, marine life also needs heat to be able to maintain its survival. Because of the importance of sea surface temperature, this study aims to determine the distribution of sea surface temperature using Terra Modis satellite imagery in the waters of Bone Bay spatially and temporally. The data processed is sea surface temperature data for 2021 obtained from the Terra MODIS level-3 satellite sensor downloaded from NASA (OCEAN COLOR or link http://modis.gfsc.nasa.gov/data), then image data processing is carried out using a SeaDas and ArGIS software with data collection stage with case studies in Bone Bay Waters. Based on the research results, the distribution of the highest sea surface temperature is in November ranging from 29.36º-34.52ºC with an average value of 30.83ºC and the lowest temperature is at August ranges from 26.64º-32.32ºC with an average SST of 28.70ºC. These results show that the Terra MODIS satellite sensor has provided good results on sea surface temperature data for 2021. Every month sea surface temperatures experience increases and decreases, until the peaks occur in November and August respectively.Keywords: sea surface temperature distribution, temperature Bone Bay, Terra MODI
Study of mechanical properties of fiberglass polymer composite material mixed with west papua-indonesia sago palm fiber
No full text601-610West Papua has been one of the largest sago-producing regions in Indonesia, with sago trees primarily used for daily needs by
the community, including house walls, roofs, and food. Composite materials have taken various forms, including fiber, sheet, and
particle reinforced, or self-reinforced polymer matrix, ceramic matrix, or metal matrix composites. This research focuses on
polymer composite materials composed of natural and synthetic fibers combined using an epoxy resin. The materials used include
sago midrib fiber, fiber glass type Woven Rofin 600 (WR), and a resin-catalyst solution (Epoxy Resin type BQTN-EX 157,
Hardener type MEPOXE). An alkaline solution of NaOH and H₂O at 4.5% and the percentage volume of matrix material with sago
sheath fiber, each sample being 95%:5%, have been applied. Matrix variation has been explored in this study. Results have shown
that the composite material combining natural and synthetic fibers with matrix variation has exhibited a low tensile strength of
36,560 J and a high tensile strength of 66,440 J. The impact strength for the composite material combining natural and synthetic
fibers with matrix variation has been found to be low at 10.87 J and high at 15.3 J
Pengenalan Produk Printer 3D sebagai Alternatif Pengolahan Sampah Botol Plastik (PET) di SD Impress 5 Pulau Raam Sorong Kepulauan
No full textThe waste problem is endless, especially non-organic waste. Garbage that has been collected and not managed properly can cause big problems. Raam Island is one of the areas in the city of Sorong that is constrained by waste problems. Many non-organic wastes cannot be resolved. It is a challenge for academics to be able to help solve. In this activity, one of the efforts made was the socialization of the existence of a method that can be applied to reduce non-organic waste. One of them is the introduction of 3D printer products processed from polyethylene terephthalate (PET) non-organic plastic waste. Plastic non-organic waste of Polyethylene Terephthalate (PET) is waste produced from drink bottles, such as mineral water bottles. Knowledge of non-organic waste processing techniques needs teaching from an early age. Therefore, socialization activities are carried out starting from the elementary school level. This activity resulted in the additional insight that there is a new method for processing non-organic plastic waste, especially the type of Polyethylene Terephthalate (PET) often used in everyday life. Based on survey results, data was generated that this activity was very beneficial for the surrounding community. It is hoped that after this activity, the surrounding community can start not directly disposing of drink bottle waste but could collect it and then process it into useful products
