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THERMAL EFFICIENCY ANALYSIS ON THE STEAM POWER PLANT IN NII TANASA BY USING A TWO-SEMESTER DIRECT METHOD WITH A CAPACITY OF 2 x 10 MW Hasanudin, La; Saefuddin, Laode; Lolok, Agustinus; Balaka, Ridway; Adnal, Adnal; Imran, Al Ichlas; Kadir, Kadir; Kadir, Abd; Aminur, Aminur
Jurnal Fokus Elektroda : Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali) Vol 4, No 3 (2019): Jurnal Elektroda Vol 4 No 3
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/jfe.v4i3.10259

The thermal efficiency of a steam power plant is very important to know because it involves the initial input of a steam supply that will turn a turbine. This is done to analyze how much thermal efficiency is used in the generation system, so that it can be seen the continued use of the generation system, which is influenced by the value of the Net Plant Heat rate (NPHR). The purpose of this study is to analyze the thermal efficiency of the steam power plant. The method used is the direct method, using a two-semester system namely: semester one (January-June) and then taking months that represent or tend to be stable data, as well as the second semester (July-December). Analysis results In the case study of a steam power plant in Nii Tanasa, the average thermal efficiency value was 17.09%, while in the second semester the analysis of thermal efficiency values was obtained an average value of 15.54%. This value still tends to be low at a capacity of 100 MW, so it is necessary to evaluate the value of the Net plant heat rate (NPHR), especially the type of fuel used, because the calculation on thermal efficiency is strongly influenced by that value.Â Key words: NPHR, Efficiency, Semester, steam, thermal

THERMAL EFFICIENCY ANALYSIS ON THE STEAM POWER PLANT IN NII TANASA BY USING A TWO-SEMESTER DIRECT METHOD WITH A CAPACITY OF 2 x 10 MW Hasanudin, La; Saefuddin, Laode; Lolok, Agustinus; Balaka, Ridway; Adnal, Adnal; Imran, Al Ichlas; Kadir, Kadir; Kadir, Abd; Aminur, Aminur
Jurnal Fokus Elektroda : Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali) Vol 4, No 3 (2019): Jurnal Elektroda Vol 4 No 3
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/jfe.v4i3.10259

The thermal efficiency of a steam power plant is very important to know because it involves the initial input of a steam supply that will turn a turbine. This is done to analyze how much thermal efficiency is used in the generation system, so that it can be seen the continued use of the generation system, which is influenced by the value of the Net Plant Heat rate (NPHR). The purpose of this study is to analyze the thermal efficiency of the steam power plant. The method used is the direct method, using a two-semester system namely: semester one (January-June) and then taking months that represent or tend to be stable data, as well as the second semester (July-December). Analysis results In the case study of a steam power plant in Nii Tanasa, the average thermal efficiency value was 17.09%, while in the second semester the analysis of thermal efficiency values was obtained an average value of 15.54%. This value still tends to be low at a capacity of 100 MW, so it is necessary to evaluate the value of the Net plant heat rate (NPHR), especially the type of fuel used, because the calculation on thermal efficiency is strongly influenced by that value.Â Key words: NPHR, Efficiency, Semester, steam, thermal

Kajian Intensitas Radiasi Matahari Bulanan Untuk Pemanfaatan Energi Surya di Sulawesi Tenggara Endriatno, Nanang; Sudarsono, Sudarsono; Sudia, Budiman; Imran, Al Ichlas; Aminur, Aminur; Aksar, Prinob; Salimin, Salimin
Jurnal Fokus Elektroda : Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali) Vol 7, No 1 (2022): Jurnal Elektroda Vol 7 No 1
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/jfe.v7i1.23117

Data potensi matahari dapat membantu dalam perancangan panel surya, alat pengering dan teknologi lain yang memanfaatan energi matahari. Penelitian ini bertujuan untuk mengetahui intensitas radiasi total matahari tahunan dan rata-rata tiap bulan di Provinsi Sulawesi Tenggara. Metode yang digunakan adalahÂ pembuatan peta batas kabupaten dengan software google earth pro, kemudian berdasar peta batas tersebutÂ dibuat peta koordinat dengan menggunakan software QGIS, kemudian memilih koordinatÂ pada tiap kabupaten untuk menentukan intensitas radiasi matahari berdasarkan data yang diambil dari database online National Aeronautics and Space Administration (NASA). Data radiasi matahari yang diambil merupakan rataÂ rata radiasi selama 22 tahun dari Januari sampai Desember.Â Lokasi yang dianalisis di Provinsi Sulawesi Tenggara yaitu; Kabupaten Buton, Buton Utara, Konawe Selatan, Konawe, Kolaka Utara, dan Kota Kendari.Â Hasil analisis menunjukkan intensitas radiasi matahari pada tiap Kabupaten yaitu:Â intensitas rata-rata tiap bulannyaÂ mempunyai pola yang berbeda,Â yaitu maksimum pada bulan maret yaitu 228.8 W/m2 dan oktober 274.2 W/m2 terjadi pada kabupaten Buton.Â Untuk nilai radiasi rata-rata maksimum 22 tahun terdapat pada Kabupaten buton Â yaitu 228,7 W/m2 dan minimum pada Kabupaten Kolaka Utara yaitu 207,3. W/m2. Sementara kabupaten lain, Buton Utara: 21.1 W/m2 , Konawe Selatan 221.1 W/m2, Kendari 211.8 W/m2, Konawe 207.8 W/m2, Kolaka Utara 207.3 W/m2.

Analisis Sifat Mekanis dan Sifat Fisis pada Komposit Serat Sabut Kelapa Serat Bambu Matriks Epoxy Sebagai Material Bumper Mobil Saputra, Reynaldi; Kardiman, Kardiman; Santoso, Deri Teguh; Imran, Al Ichlas
Jurnal Rekayasa Mesin Vol 17, No 1 (2022): Volume 17, Nomor 1, April 2022
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v17i1.3014

Material komposit merupakan material yang tersusun dari dua gabungan atau lebih material, yang mana menghasilkan suatu material baru dengan sifat-sifat material yang lebih baik dari material dasar sebelumnya. Penelitian ini bertujuan untuk menganalisis sifat mekanis dan sifat fisis serat sabut kelapa serat bambu matriks epoxy sebagai material bumper mobil. Komposit dibuat menggunakan lima variasi fraksi volume yaitu 5% serat sabut kelapa: 15% serat bambu: 80% matriks, 10% serat sabut kelapa: 10% serat bambu: 80% matriks, 15% serat sabut kelapa: 5% serat bambu: 80% matriks, 0% serat sabut kelapa : 20% serat bambu : 80% matriks dan 20% serat Sabut kelapa: 0% serat bambu: 80% matriks dan karakteristik sifat fisis meliputi data densitas, swelling, dan serapan air. Hasil pengujian sifat fisis komposit pada swelling, dan serapan air menunjukkan bahwa komposit yang dibuat telah memenuhi klasifikasi JIS A5908, sedangkan densitas komposit masih belum memenuhi klasifikasi JIS A5908. Hasil pengujian tarik pada komposit menunjukkan bahwa nilai kekuatan tarik maksimal yang paling besar diperoleh pada fraksi 20% serat bambu : 0% serat Sabut kelapa : 80% matriks dengan nilai 95,578 MPa, yang mana diikuti penurunan kekuatan tarik pada fraksi volume 5% serat sabut kelapa: 15% serat bambu: 80% matriks, 10% serat sabut kelapa: 10% serat bambu: 80% matriks, 15% serat sabut kelapa: 5% serat bambu: 80% matriks, dan 20% serat sabut kelapa: 0% serat bambu: 80% matriks Komposit yang dianalisis masih layak digunakan sebagai material pembuat bumber mobil karena kekuatan tariknya tidak kurang dari standar bumper mobil yaitu 8,09 MPa.

Perancangan Rangka Sepeda Gunung Menggunakan Software Autodesk Inventor Imran, Al Ichlas; Aminur, Aminur; Aksar, Prinob
Dinamika : Jurnal Ilmiah Teknik Mesin Vol 15, No 2 (2024):
Publisher : Jurusan Teknik Mesin, Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/djitm.v15i2.49017

Sepeda gunung banyak diminati karena desainnya yang menarik dan kegunaannya yang cocok untuk medan terjal dan curam. Rangka sepeda gunung harus sangat kuat untuk menanggung beban di berbagai kondisi medan. Penelitian ini menggunakan perangkat lunak Autodesk Inventor untuk merancang rangka sepeda dengan mempertimbangkan variasi beban yang sesuai dengan rata-rata berat manusia. Hasil analisis menunjukkan tegangan Von Mises maksimum 102,9 MPa, perpindahan maksimum 0,02816 mm, dan faktor keamanan minimal 2,43. Faktor keamanan pada titik acuan dengan tegangan tertinggi jauh melebihi batas desain yang diizinkan sehingga desain ini dianggap aman.

Studi Penurunan Tekanan Akibat Aliran Melalui Katup Arfan, Arfan; Salimin, Salimin; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 5, No 3 (2020): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The purpose of this study was to determine the effect of flow rate (Q) on pressure drop (ΔP) and to find out how much pressure drop value (ΔP) and loss coefficient (k) occurred in valves. The method used is an experimental study, using a series of test installations. In this study the free variables used were the flow rate that passes through the valve pipe, for bound variables are reynolds number (Re), loss coefficient (K) and pressure decrease (ΔP). Based on the results of the study, it can be concluded that the greater the discharge of outflow (Q) the smaller the value of pressure reduction (ΔP) that occurs, and vice versa. The pressure drop value (ΔP) obtained at the valve opening was 16.6% for each point of ΔP1-2, ΔP1-3, ΔP1-4, ΔP1-5 of 18846.1 Pa; 19129.2 Pa; 20506.1 Pa; 20897.0 Pa. While the amount of friction coefficient value (hf) obtained at the valve opening is 99.6% for each point hf2, hf3, hf4, hf5 which is 0.188 mH2O; 0.263 mH2O; 0.338 mH2O; 0.414 mH2O. Keywords: Valve, Discharge, Head Loss, Pressure Drop

Rancang Bangun Bilah Taperless Jenis Horizontal Axis Wind Turbin Untuk PLTB 500 Watt Dengan Airfoil NACA 6412 Menggunakan Software Qblade Usman, La Ode; Balaka, Ridway; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 2 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Energy demand in Indonesia generally continues to increase due to population growth, one of the most widely used energies is wind energy. The research objectives are to determine the geometry of the blades, design and manufacture the blades suitable for use in moderate winds and to determine the power generated. The research started from determining the geometry of the blades for medium speed wind, then making the blades and then testing the blades. The geometry of the blades formed is tapertlles blades of the horizontal axis wind turbine type NACA 6412 airfaoil using Qblade software. The blade is designed with a blade radius of 0.774 m, the chord is 0.0999 m using mahogany wood material. The manufacturing method used is the manual method with the help of machine tools. The blades are tested for equilibrium, then mounted on the tower, 10 meters high to take the data. The test results show that the blades that have been made work well and produce an average power per second of 58.29 Watt, 90.82 Watt, and 102.00 Watt, for three days of testing.Keywords: Tuperless blades, airfoil naca 6412, qblade, horizontal axis wind turbines, mahogany wood.

Perancangan Alat Angkat (Dongkrat Bold) Elektrik Anwar, Muh. Syahrul; Sisworo, Raden Rinova; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 7, No 2 (2022): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The jack is one of the modern technologies that is used to facilitate work during the process of lifting heavy loads so that heavy loads will be easily lifted according to the desired needs. The purpose of this research is to know the designer of the electric lift (bold jack) and to know the designer of the gearbox/gear holder and the motor mount. This research method design design, calculate the load, calculate the torque and power transmission, . In this study, it produces 5880 joules of work with a force of 14700 N, has a dc motor with 400 watts and a rotational speed of 700 rpm with power transmission that occurs ivn some parts of the motor at 700 rpm, reducer at 480 rpm, sprocket 345.6 rpm and what happens to the jack is 57.6 rpm with a chain speed of 1.645 m/s and the allowable shear stress is 0.00019 Mp and the equivalent load is 113.37 or 5142 kgf.Key words : Formulation, clove oil. engine performance

Pengaruh Media Perendaman Komposit Rami Poliester Terhadap Kekuatan Tarik dan Kekuatan Bending Fadli, La Ode Muammar; Sudarsono, Sudarsono; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 4, No 2 (2019): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The purpose of this research is to know the influence of water absorption withfreshwater soaking media, and seawater to tensile strength and bending powerof ramie-polyester composite. The ramie-polyester composite research is madeby the method of hand-lay-up with a fiber-matrix fraction of 30:70 %. The specimen is made according to the ASTM D 638-01 tensile test Standard and ASTM D 9002 standard bending test. The Immersion test with freshwater soaking media, and seawater for 7 days. The tensile test and bending test is done for conditions before immersion and after immersion. The research results showed that the value of absorption specimen freshwater tensile test is 6.2948 %, and seawater is 5.1579 %. While freshwater bending test specimens are 6.2937 % and soaking water is 5.1575 %. The highest tensile strength was on the specimen without immersion 18.266 N/mm2 and the lowest tensile strength is on the freshwater soaking specimen of 11.303 N/mm2. The highest bending strength was on the specimen without immersion 40,120 N/mm2 and the lowest bending strength is on the freshwater soaking specimen of 18,082 N/mm2. Keywords: composite, ramie, polyester, water absorption, tensile strength andbending.

Pengembangan Desain Kompor Gasifikasi Top Lith Up Draft (TLUD) Syahrir, Muhamad Ashar; Mangalla, Lukas Kano; Imran, Al Ichlas
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 6, No 3 (2021): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

The use of environmentally friendly stoves in the household sector can be an alternative to overcome the limited use of kerosene and the constrained supply of LPG. The purpose of the study was to develop a gasification stove design with the concept of Top Lith Up Draft on several variations of the column, namely without columns, column 2 holes and column 4 holes using cashew shell fuel which produces optimal gas fuel. The research method is the Top Lith Up Draft method, which is a gasification process semi-gasifier technology method that can produce fewer emissions that can harm human health. The results obtained indicate that the development of the TLUD gasification stove design from several variations of the column functions well. The gasification testing process carried out for the three variations of the column used resulted in good temperature values, namely for variations without a temperature column of 829 , column 2 holes of 935 , and column 4 holes of 934 . The best column variation is the 2 hole column with the highest temperature value of 935. Kata kunci: Gasification, TLUD, cashew shell, efficiency.

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