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All Journal Jurnal Teknik Mesin Jurnal Pengabdian Masyarakat Bhinneka International Journal of Innovation in Mechanical Engineering and Advanced Materials Aceh International Journal of Science and Technology
Sudarma, Andi Firdaus
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health

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ANALISIS EFISIENSI KONSUMSI ENERGI LISTRIK PANEL SURYA UNTUK WARUNG UMKM DENGAN METODE INSTALASI ATAP LANGSUNG Saputra, Agung; Sudarma, Andi Firdaus
Jurnal Teknik Mesin ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ(Journal Of Mechanical Engineering) Vol 11, No 3 (2022)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v11i3.16248

Abstract

Energi listrik sangat penting untuk kebutuhan sehari-hari. Pemakaian peralatan elektronik pada saat ini terus meningkat, maka sangat berpengaruh terhadap konsumsi daya listrik yang besar. Dibutuhkan energi alternatif yang lebih ramah lingkungan, bersih, dan tidak terbatas, salah satunya yaitu energi surya. Pada penelitian ini akan menerapkan pembangkit listrik tenaga surya sebagai atap langsung pada warung UMKM, kemudian dilakukan tahapan perhitungan komponen PLTS, terlebih dahulu mengetahui beban yang digunakan pada warung UMKM. Selanjutnya melakukan analisis efisiensi dari masing-masing komponen PLTS termasuk efisiensi beban, dan analisis ekonominya. Parameter yang digunakan dalam pengambilan data yaitu input dan output tegangan, arus dari produksi PLTS, konsumsi beban, kemudian menghitung biaya Life Cycle Cost (LCC), biaya tarif listrik sistem Levelized Cost of Energy (LCOE), Pay Back Period (PBP), dan kriteria kelayakan investasi Net Present Value (NPV). Hasil dari perhitungan didapatkan total beban pada warung UMKM sebesar 1710 Wh, maka dibutuhkan panel surya sebanyak 6 buah dengan kapasitas 100 Wp jenis Polycrystalline, SCC tipe PWM dengan kapasitas 60 A, baterai dengan jenis VLRA 12V 200 Ah, dan Inverter jenis pure sine wave 1000 W. Pengujian selama 7 hari didaptakan efisiensi dari panel surya sebesar 7,92 %, SCC sebesar 69,99 %, baterai 72,35 %, inverter 95,92 %, dan produksi total energi listrik yang dihasilkan PLTS selama 7 hari didapatkan rata-rata sebesar 1,362 kWh dengan konsumsi beban harian rata-rata sebesar 1,392 kWh. Analisis ekonomi didapatkan biaya investasi (LCC) untuk lifetime sistem selama 20 tahun sebesar Rp.27.645.000, tarif LCOE harga listrik sebesar Rp. 2.781,14/kWh, dengan (PBP) selama 20 tahun, dan nilai dari NPV positif maka investasi yang dilakukan dapat dikatakan layak.
ANALISIS PERPINDAHAN PANAS ALAT PENUKAR KALOR SHELL DAN TUBE DENGAN FLUIDA KERJA AIR DAN HIDROKARBON MENGGUNAKAN METODE EFEKTIVITAS-NTU Lutfiansyah, Anggi; Sudarma, Andi Firdaus
Jurnal Teknik Mesin ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ(Journal Of Mechanical Engineering) Vol 11, No 3 (2022)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v11i3.16257

Abstract

Perkembangan teknologi pada bidang proses sangat dibutuhkan dengan adanya alat penukar kalor menjadi salah satu teknologi yang paling banyak digunakan untuk proses perpindahan panas. Alat penukar kalor shell dan tube (HE-101) memiliki peranan yang sangat penting terhadap keberhasilan rangkaian proses produksi pada unit penghasil kondensat. Penelitian bertujuan untuk mengetahui parameter perpindahan panas yang optimum dari alat penukar kalor shell dan tube secara aktual, membandingkan efektivitas aktual alat penukar kalor shell dan tube dengan hasil perhitungan dan menganalisis kemungkinan terjadinya penurunan kinerja. Metode yang digunakan dalam penelitian ini merupakan metode observasi, studi pustaka dan wawancara. Fluida panas yang berada pada shell yaitu hidrokarbon (C4+) sedangkan fluida dingin yang mengalir pada tube yaitu air. Dari analisis pada alat penukar kalor shell dan tube (HE-101) diperoleh hasil perhitungan untuk nilai koefisien perpindahan panas menyeluruh (U) 113,75 W/m2.oC, perpindahan panas di dalam shell (ho) 304,76 W/m2.oC, perpindahan panas di dalam tube (hi) 354,80 W/m2.oC, penurunan tekanan pada sisi shell (ΔPs) 1638,62 Pa, penurunan tekanan pada sisi tube (ΔPt) 21539,06 Pa, dan nilai efektivitas (ε) dengan menggunakan metode Number of Transfer Units (NTU) sebesar 36,96%. Dapat disimpulkan bahwa alat penukar kalor shell dan tube (HE-101) telah mengalami penurunan kinerja, sehingga perlu adanya pembersihan yang dilakukan pada alat penukar kalor shell dan tube HE-101.
ANALISIS STUDI KONSUMSI ENERGI SISTEM TATA UDARA PASSIVE CHILLED BEAM DAN ACTIVE CHILLED BEAM PADA GEDUNG PERKANTORAN DI INDONESIA Inayaturrakhman, Ikhsan; Sudarma, Andi Firdaus
Jurnal Teknik Mesin ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ(Journal Of Mechanical Engineering) Vol 12, No 1 (2023)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v12i1.16305

Abstract

Salah satu hal yang perlu diperhatikan dalam perencanaan sistem tata udara adalah tingkat konsumsi energi karena sistem tata udara merupakan penyumbang energi terbesar pada bangunan. Beberapa alternatif dihasilkan dari perkembangan teknologi sistem tata udara bisa menjadi pilihan untuk mendapatkan sistem tata udara yang optimal dan efisien dalam hal konsumsi energi, salah satunya adalah Chilled Beam. Penelitian ini bertujuan untuk mengetahui sistem tata udara yang paling efisien antara sistem Passive Chilled Beam dan Active Chilled Beam dibandingkan dengan standar nilai Intensitas Konsumsi Energi (IKE) gedung efisien di Indonesia. Analisis metode kuantitatif digunakan untuk mendapatkan nilai konsumsi energi pada kedua sistem tata udara dengan menentukan kriteria kondisi ruangan, melakukan perhitungan beban dan seleksi chilled beam dihasilkan beban pendinginan sebesar 753.14 kW. Berdasarkan pemakaian pada jam operasional kantor (08.00 – 17.00) = 9 jam maka didapatkan hasilnya bahwa sistem Active Chilled Beam memiliki nilai Intensitas Konsumsi Energi (IKE) yang lebih efisien yaitu sebesar 74.86 kWh/m2.tahun dibandingkan dengan sistem Passive Chilled Beam dengan konsumsi energi 98.04 kWh/m2.tahun.
Studi Numerik Pengaruh Geometri Supply Air Grille serta Variasi Kecepatan Udara Masuk Terhadap Distribusi Temperatur di Dalam Ruangan Terkondisi Sudarma, Andi Firdaus; Widianto, Fajar
Jurnal Teknik Mesin ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ(Journal Of Mechanical Engineering) Vol 10, No 1 (2021)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v10i1.10096

Abstract

– Sistem pengkondisian udara adalah fasilitas utama untuk menciptakan kenyamanan termal pada suatu ruangan. SAG memegang peranan penting dalam mengatur penyebaran udara. Dalam penelitian ini dua buah tipe SAG dengan geometri berbentuk linear dan square diteliti secara numerik. Kecepatan aliran masuk divariasikan pada besaran 1,6, 3,1 dan 4,6 m/s dipelajari untuk mengetahui pengaruhnya terhadap distribusi temperatur. Hasil dari simulasi ditampilkan dalam bentuk kontur temperatur pada bidang horizontal dan gradien temperatur pada posisi vertikal. Analisis dilakukan terhadap hasil untuk mengetahui distribusi temperatur dan besaran temperatur rata-rata guna terciptanya kenyamanan termal. Hasil simulasi menunjukkan bahwa SAG tipe square mampu mendistribusi temperatur lebih merata dibandingkan tipe linear. Hasil lainnya juga memperlihatkan bahwa kenyamanan diraih oleh tipe square pada laju aliran yang lebih rendah dibandingkan dengan tipe linear.
Heat Distribution Simulation in a Square Aluminum 7075 Plate Using Laplace Equation and MATLAB Pudjiwati, Sri; Sudarma, Andi Firdaus; Tarigan, Kontan; Khaerudini, Deni Shidqi; Djajadiwinata, Eldwin
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 6, No 2 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i2.25356

Abstract

The efficient management of heat transfer from aircraft engines to the wings is vital for maintaining thermal efficiency and structural integrity in modern aircraft design. Excessive heating of the wings, caused by engine-generated heat, can negatively impact aerodynamic performance and safety. This study focuses on analyzing heat distribution in a square aluminum 7075 plate to better understand heat transfer mechanisms. Using the Laplace equation, implemented through MATLAB (2023 Online Version), we aim to simulate and analyze heat distribution on the plate. The numerical method employed in this research involves solving the Laplace equation with Neumann boundary conditions, which represent insulated edges. The Liebmann method is used to iteratively reduce error to less than 1%. Simulations are conducted on an aluminum 7075 plate of dimensions 4x10⁻² m x 4x10⁻² m under various temperature conditions at the edges. Numerical results show that at the 9th iteration, the error reaches 0.71%, while MATLAB simulations yield an error of 0.4681% at the same iteration. The heat distribution across the plate is clearly visualized, and the analysis indicates that increasing the number of grids improves both the clarity and accuracy of the simulation results. In conclusion, this study demonstrates that applying the Laplace equation via MATLAB is an effective approach for analyzing heat distribution in aluminum 7075 plates. The results show that a finer grid resolution enhances accuracy, with a 101-grid system providing particularly clear and precise heat distribution patterns. These findings contribute to the optimization of thermal system designs, especially in aviation-related applications.
Performance Analysis of R600a as a Replacement for R134a in a Household Refrigeration System Sudarma, Andi Firdaus; Carles, Henry; Azhar, Azmi; Akmal, Muhammad; Sirait, Alfa Firdaus
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 14, No 2 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v14i2.32326

Abstract

This study evaluates the performance of a 50-liter mini refrigerator using R600a as an alternative to the factory-default refrigerant, R134a. The experimental setup included pressure gauges and digital thermometers to measure key parameters such as temperature and pressure at critical points in the refrigeration cycle. Tests were conducted under two scenarios: no-load and a 4 kg chicken meat load. Initially, the system operated with R134a at 16 bar and 20 g charge before being evacuated and recharged with R600a at the same pressure. Data was collected over a 10-minute period under stable conditions and analyzed using a P-h (Pressure-Enthalpy) diagram to determine enthalpy, refrigeration effect, compressor work, and coefficient of performance (COP). The effect of using R600a, efficiency increased 4% without load and 7% with load operation compared to R134a system. While COP actual has increased 5% and 10% respectively. The results indicate that R600a offers comparable performance to R134a while presenting potential advantages in terms of energy efficiency and environmental impact. These findings contribute to the ongoing evaluation of R600a as a sustainable replacement for R134a in household refrigeration applications.
STUDY OF FINITE DIFFERENCE METHOD IN HEAT FLOW SIMULATION OF TWO-CHAMBER THERMOS SEPARATOR MADE OF POLYPROPYLENE USING MATLAB APPLICATIONS Pandriana, Aap; Pudjiwati, Sri; Alva, Sagir; Tarigan, Kontan; Sudarma, Andi Firdaus; Khaerudini, Deni Shidqi
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 13, No 2 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v13i2.27803

Abstract

Heat transfer can be defined as transfer of energy from one area to another as a result of temperature differences in objects. This indicates heat transfer not only explains how heat energy is transferred from one object to another, but can also predict the rate of heat transfer that occurs under certain conditions. In this case, what is related to the heat flow model equation is two-chamber thermos separator where the separator is made of polypropylene. This separator functions to prevent the flow of heat from one side to the other side of the thermos tube. Polypropylene is included in the insulator category, although heat transfer still occurs. The heat transfer will be calculated using the finite difference method in parabolic partial differential equations using the Matlab application. The heat transfer process is assumed to occur by conduction, with a separator length of 1 cm. Assume the first side of the divider has a right temperature of 100°c, and the other side 20°c. The temperature point measured on the separator is located in the center of the separator. After completing the solution using the Matlab application with the finite difference method, a heat transfer flow simulation was obtained in the two-chamber thermos separator which shows the heat flow transfer at any time. At 0.1 seconds the temperature at T1 is 2.4°c, while at 10 seconds  is 65.9704°c. Then at 0.1 seconds the temperature at T4 is 0.48°c, while at 10 seconds 19.5436°c. The conclusion is in the separator of the two-chamber thermos there is significant heat flow from the side of the first tube to the other side.
STUDY OF THE NEWTON RAPHSON METHOD IN ANALYZING THE DEPTH OF FLUID FLOW IN THE WASTEWATER CANAL U RPS TKRO SMKN 1 CIRUAS USING THE MATLAB APPLICATION Susilo, R Dwi Pudji; Tarigan, Kontan; Sudarma, Andi Firdaus; Oktaviani, Ana Nur; Khaerudini, Deni Shidqi; Fitri, Muhamad
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 13, No 2 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v13i2.27624

Abstract

Abstract--Flow Depth can be defined as channel height or open channel flow depth, is an important parameter in hydraulic calculations and analysis. The depth of flow in the U channel (U channel) of the Student Practice Room (RPS) for Automotive Light Vehicle Engineering (TKRO) at SMKN 1 Ciruas often causes delayed flow congestion and full channels. Sometimes it is dry if only a few students carry out practical use of room practice and use of water and other waste. The aim of this research is to find a solution to this problem, namely by knowing the depth of flow in the channel so that in the future when designing waste water drainage channels it can be designed appropriately and in accordance with the volume of waste released. The method is to calculate the flow depth in the U channel using NEWTON RAPHSON numerical analysis and the Matlab application to determine the flow depth. The calculation result is the depth of water flow in channel U, with water flow discharge Q = 0.016 m3/s, Manning coefficient for roughness of channel walls and base n = 0.025, slope of channel bottom I = 0.003, and width of channel U B = 0.22 m, at The 11th and 12th iterations flow depth = 0.194864 m. The results of manual exact calculations in the 11th and 12th iterations, the error percentage is 0%, meaning that the flow depth is uniform at a water level of 0.194864 m. Calculations using the Matlab application obtained graphs and the iteration steps were slightly different in the 12th and 13th iterations, the flow depth results were the same = 0.194864 m. The initial guess at flow depth(h)=1, the percentage error is 25%, the uniform flow depth of the RPS TKRO SMKN 1 Ciruas U channel is 0.194864 m.Keywords : Depth of flow, NEWTON RAPHSON, Open Channel, U Channel, MATLAB
Characterization of Natural Fiber Reinforced Resin Composites and Glass Waste Powder for Brake Linings Fitri*, Muhamad; Sudarma, Andi Firdaus; Latief, Alfan Ekajati; Hamid, Abdul; Azis, Iqbal Lutfil; Surya Jati, Stenlly Damar
Aceh International Journal of Science and Technology Vol 14, No 1 (2025): April 2025
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.14.1.42585

Abstract

Currently, there are two types of brake linings in the market: asbestos brake lining and asbestos-free brake linings. The asbestos Brake lining was widely used due to durability, heat resistance and friction properties. In terms of price, asbestos brake linings are indeed cheaper than asbestos-free brake linings, However, they have negative impact on the environment and human health. In high enough concentrations, asbestos dust can cause Mesothelioma, a malignant tumor in the lining of the lungs). Therefore, it is necessary to find a substitute material for asbestos that is affordable but possesses similar characteristics to asbestos brake linings. While, the high production of salak in Indonesia has a side effect, i.e.: the large volume of waste in the form of peel and seeds of salak. If not utilized, of course this will become waste. Meanwhile, glass waste is an inorganic waste material that is very difficult to decompose and pollutes the environment. Meanwhile, glass waste is one of the inorganic waste materials that is very difficult to decompose and pollutes the environment. The aim of this study was to characterize composite resin materials reinforced with glass waste powder, Snake Fruit Peel Powder and teak wood sawdust as alternative brake lining materialsThe research was conducted through laboratory experiments, beginning with the manufacture of sample specimens, followed by measuring their density, hardness, and friction coefficient testing then compared to brake lining on the market and also based on the SNI 09-0143-1987 standard. The result showed, some of the investigated samples in this study meet the reqirement of SNI 09-143-1987, where the lowest Brinell Hardness number of the sample 120.33. There are 5 specimens of friction coefficient of the specimens are also fullfill the requirement.
Pelatihan Pengoperasian Mesin Pengurai Sabut Kelapa Di RPTRA Menara Kelurahaan Kembangan Selatan Jakarta Barat Subekti, Subekti; Indah, Nur; Pratiwi, Swandya Eka; Wahyudi, Haris; Anggara, Fajar; Sudarma, Andi Firdaus; Carles, Henry; Sari, Andarany Kartka; Suprihatiningsih, Wiwit
Jurnal Pengabdian Masyarakat Bhinneka Vol. 3 No. 4 (2025): Bulan Juli
Publisher : Bhinneka Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58266/jpmb.v3i4.250

Abstract

\ Proses pengolahan limbah sabut kelapa dengan menggunakan mesin pengurai sabut kelapa dapat memudahkan proses produksi. Hasil produksi dari penguraian sabut menghasilkan cocofiber dan cocofeat yang dapat di manfaatkan dalam berbagai macam produk seperti jok mobil, matras, keset, kerajinan tangan, papan serat, serta produk ramah lingkugan lainnya. Hal tersebut menunjukkan bahwa penggunaan produk-produk rumahan tidak hanya berasal dari bahan baku sintetis. Pemanfaatan sabut kelapa dengan sumber bahan baku yang relatif mudah didapatkan dapat membantu perindustrian ekonomi kecil dan menengah, dengan demikian pengabdian masyarakat melalui merancang mesin pengurai sabut kelapa menggunkan motor bakar bensin sebagai penggerak mesin untuk mempermudah proses penguraian sabut kelapa sebelum diproduksi. Sehingga tujuan pengabdian masyarakat dalam menanfaatkan limbah serabut kelapa menjadi barang dapat bernilai ekonomis sehingga dapat meningkatkan taraf hidup masyarakat sekitar. Kegiatan ini dilakukan dengan ceramah dan demo mesin pengurai sabut kelapa. Masyarakat yang akan terlibat dari kegiatan ini sekitar 40 orang yang diatur oleh RT/RW setempat, Kegiatan ini sangat diapresiasi oleh para peserta dimana hampir 88 % peserta memahami isi materi dan praktek Mesin Serabut Kelapa. Sedangkan untuk nilai terendah sekitar 72 % menyatakan bahwa kegiatan ini sangat diperlukan oleh para peserta dan berlangsung sukses dengan banyaknya pertanyaan dan saran agar kegiatan ini dilanjutkan.
Co-Authors Abdul Hamid Agung Saputra Anggara, Fajar Azhar, Azmi Azis, Iqbal Lutfil Carles, Henry Deni Shidqi Khaerudini Djajadiwinata, Eldwin Fitri*, Muhamad Inayaturrakhman, Ikhsan Latief, Alfan Ekajati Lutfiansyah, Anggi Muhamad Fitri Muhammad Akmal Nur Indah, Nur Oktaviani, Ana Nur Pandriana, Aap Pudjiwati, Sri Sagir Alva Sari, Andarany Kartka Sirait, Alfa Firdaus Subekti Subekti Surya Jati, Stenlly Damar Susilo, R Dwi Pudji Swandya Eka Pratiwi, Swandya Eka Tarigan, Kontan Wahyudi, Haris Widianto, Fajar Wiwit Suprihatiningsih