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Aryadi Suwono
Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung, Bandung
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Mechanical Engineering

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KAJI EKSPERIMEN OPTIMASI KOEFISIEN DAYA SKEA JENIS POROS DATAR DENGAN SUDU GABUNGAN SILINDER BERPUTAR DAN ROTOR SAVONIUS Soetanto, Maria F; Suwono, Aryadi; Darmanto, Prihadi S; Pasek, Ari D
Mesin Vol 19, No 2 (2004)
Publisher : Mesin

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Abstract

Horizontal Axis Wind Energy Conversion System (HAWECS) is more efficient than other Wind Energy Conversion Systems at the same condition [2,3]. Rotating cylindrical blade is taken as the substitute alternative to the airfoil blade considering that presence of lift force and its simple manufacturing production. The lift force generated by the rotating cylinder is known as the Magnus Effect [1,7,9]. The savonius rotor in this research is employed to propel the cylinder. This research conducted an experiment to optimize the energy conversion of a HAWECS which its blades consist of the combination of cylinder and savonius rotor. Two kind of blades were used in this experiment, i.e.blade with L/D (ratio of the length and diameter of cylinder) equals to 3 and 4. Three variations of wind velocities were used, i.e. 8.5 m/s, 9.7 m/s, and 10.2 m/s. Experimental results present that the blade with L/D ratio = 4 give more efficient than the L/D = 3, and the increase of power was reached if the wind velocity increases.
PERANCANGAN DAN STUDI KARAKTERISTIK PRFSSURIZER PADA UNTAI UJI NILO-1 UNTUK TEKANAN NOMINAL 6 MPa Suryanto, Hari; Suwono, Aryadi
Mesin Vol 11, No 1 (1996)
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Abstract

Pada reactor air bertekanan, pressurizer mempunyai peranan yang sangat penting diantaranya yaitu sebagai surge-tank untuk menampung perubahan volume dan sebagai pengendali tekanan pendingin primer pada berbagai kondisi perubahan beban reactor yang sangat erat kaitannya dengan system keselamatan. Pemahaman yang mendalam dari gejala yang berlangsung pada alat ini merupakan landasan utama baik untuk perancangannya maupun prediksi karakteristiknya terutama saat berlangsung kelalaian kondisi operasi dari reaktor. Untuk tujuan pemahaman tersebut dengan bertitik tolak dari persamaan kekekalan massa dan energy untuk volume atur serta persamaan tingkat keadaan dilakukan analisis untuk perancangan dan prediksi karakteristik sebuah model pressurizer yang bersesuaian dengan kondisi operasi untai uji NILO-1 pada tekanan operasi nominal 6 MPa. Melalui penerapan metode numeric untuk menyelesaikan persamaan differensial dilakukan simulasi kondisi operasi model pressurizer hasil rancangan termasuk respon waktu yang berlangsung pada saat mengalami kondisi operasi.
PREDIKSI TEKANAN UAP DAN VOLUME MOLAR SENYAWA HIDROKARBON DENGAN PERSAMAAN TINGKAT KEADAAN Ratnawati, Ratnawati; Suwono, Aryadi; Samudro, H.M
Mesin Vol 11, No 3 (1996)
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Abstract

Vapor pressures and saturated liquid molar volumes of hydrocarbons up to n-C16 were predicted using equations of states. The equations of states used were Redlich-Kwong (RK), Mohsen Nia et al.-Redlich-Kwong (MRK), Saave-Redlich-Kwong (SRK), and Peng-Robinson (PR). The calculated values were compared to the experimental data extracted from various sources. The results indicated that PR eos was superior among the others.
ANALISA PEMAKAIAN ENERGI PABRIK AMONIA Siswantyasmoyo, Siswantyasmoyo; Suwono, Aryadi
Mesin Vol 3, No 1 (1984)
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Abstract

Tulisan ini mengetengahkan hasil penelitian tentang pemakaian energi dari salah satu pabrik amonia yang ada di Indonesia. Cara penyajian dan metoda analisa yang diterapkan, diharapkan dapat digunakan sebagai landasan untuk tujuan manajemen energi di dalam pabrik.
SIFAT MAMPU NYALA DAN MASSA OPTIMUM REFRIGERAN CAMPURAN R-290/R-22 SEBAGAI ALTERNATIF PENGGANTI R-22 Pasek, Ari D; Suwono, Aryadi; Nugraha, Novianti; Rosyadi, Usman
Mesin Vol 22, No 2 (2007)
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Abstract

The limited application of ozone depleting substance (ODS) such as CFC and HCFC refrigerants has encourage researchers to find a new alternative refrigerant. Hydrocarbon refrigerant such as R-290 (propane) has been widely used because it is environmentally friendly, save energy, and drop-in substitute. However, hydrocarbon refrigerants are flammable and categorized as A3 class refrigerant, so that the application of the refrigerants are limited by safety standard. In this research, an effort to lower the flammability of R-290 has been carried out. Series of flammability test have been done to proof that the flammability of R-290 is reduced by mixing it with R-22. Mixture of R-290/R-22 at molar fraction 0.4/0.6, 0.5/0.5, 0.59/0.41 has Lower Flammability Limit (LFL) above 3.5%, so that it can be classified as A2 class refrigerant. The optimum refrigerant charges of the refrigerant mixtures that give the highest COP have also been investigated. The results show that the optimum refrigerant charge of the mixture is lower than R-22 but higher than pure R-290. The system COP of R-290/R-22 mixture is higher than that of R-22 but lower than R- 290 system.
STUDI EKSPERIMENTAL PROSES QUENCHING BERKAS PIPA PANAS SEBAGAI PEMODELAN PROSES REFLOODING TERAS REAKTOR NUKLIR Wasitho, Muhadi Ayub; Suwono, Aryadi
Mesin Vol 12, No 1 (1997)
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Abstract

To simulate the thermohydraulic characteristics of reflooding process of a nuclear core reactor during lost of cooling accident, an experimental study using a reduced model was carried-out. The core reactor model consists of a 50 mm tubular transparent shell made of quartz and a bundle of 4 zircaloy-4 pipes of equal diameter 10.7 mm which are equipped with electrical heaters in the inside. The configuration of pipe bundle is in-line with the distance between pipe axis is 14.2 mm. The pipes are identic to those usually used as nuclear reactor fuel claddings. The quenching process was done by flooding the pipe bundle from the bottom. The observation temperature drop of the pipes surface and temperature rise of cooling water for various wetting velocity, initial pipe temperature and cooling water were recorded and analyzed. The quenching phenomenon was also observed visually. The initial pipe temperature and wetting velocity range are 100 - 500 "C and 4 - 20 cm/s, respectively.
STUDI NUMERIK PENGARUH JUMLAH DAN PUNTIRAN SWIRLER VANES PADA ALIRAN MASUK TABUNG Parwatha, I Gede; Hartono, Firman; Pasaribu, Hisar M; Sardjadi, Djoko; Suwono, Aryadi
Mesin Vol 20, No 2 (2005)
Publisher : Mesin

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Abstract

Flow field at the inlet of a combustor under the influence of swirler vanes was investigated computationally. The isothermal flow was examined to predict the combustion stability. The simulations indicate different flow-field characteristics can be achieved under the same swirl number. In addition to swirl number, swirl velocity induces the existence of centrifugal force. This force affect velocity profile peak, static pressure profile, radially; and recirculation zone, axially.
ANALISIS TERMOHIDROLIK ALIRAN AIR PENDINGIN PADA BERKAS EMPAT PIPA PEMANAS SUSUNAN SEBARIS MENGGUNAKAN PAKET PROGRAM FLUENT V4.25 Nazar, Reinaldy; Suwono, Aryadi; Soelaiman, T.A Fauzi
Mesin Vol 11, No 3 (1996)
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Abstract

The FLUENT V4.25 program is the CFD (Computational Fluid Dynamics) simulation. It can be used for fluid flow and heat transfer analyses and others. Regarding the program, the test is needed to know the validity, to verify that the program will give good output. Based on the test using experimental data on four heated parallel rod bundles, the output FL UENT V4.25, it gave a good result, where the differences between calculation and experimental data are not significant. It is expected that the FLUENT V4. 25 program may achieve success in thermo-hydraulic analysis on other similar systems.
KAJI TEORIK KARAKTERISTIK PEMBAKARAN CAMPURAN BATUBARA-AIR (CBA) Suwono, Aryadi
Mesin Vol 8, No 1&2 (1989)
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Abstract

Melalui analisis termodinamika, karakteristik pembakaran campuran batubara-air (CBA) dengan contoh batubara dari Bukit Asam Tanjung Enim telah dikaji. Pengaruh konsentrasi terhadap nilai kalor ditunjukkan serta dibandingkan dengan bila batubara dari jenis standar. Demikian pula pengaruh suhu gas buang pembakaran terhadap kalor pembakaran dibahas.
PENGEMBANGAN PERANGKAT LUNAK UNTUK PENERAPAN TEKNIK PINCH DENGAN MELIBATKAN KENDALA RUGI TEKANAN Adriansyah, Willy; Suwono, Aryadi
Mesin Vol 11, No 2 (1996)
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Abstract

The existing software of pinch technique provide only the tool for the heat exchanger network design. To improve the reliability of the software, in particularly for retrofitting the existing system, several additional aspects need to be included. In this paper, an algorithm to determine the optimum condition of heat exchangers for a specified allowable head loss is proposed. With this new method, the retrofit design of an existing system can be done even by taking into consideration of using the existing fluid circulation systems (i.e. pumps and compressors). The proposed method of heat exchanger can also be used under the pressure drop constraints on both tube and shell sides.
Co-Authors A.A. Ketut Agung Cahyawan W Abdurrachim Abdurrachim Adriansyah, Willy Agus Hermanto Darmanto, Prihadi S Hardianto, T Hardianto, Toto Hari Suryanto Hartono, Firman Hidayat, Fery Indartono, Yuli Setyo Josito, H. M Kamajaya, K Muhadi Ayub Wasitho Nugraha, Novianti Parwatha, I Gede Pasaribu, Hisar M Pasek, A. D Pasek, Ari D Ratnawati Ratnawati Reinaldy Nazar Rosyadi, Usman S, Adolf Asih Sambodo, Amir Samudro, H.M Sardjadi, Djoko Simanjuntak, Toman S Siswantyasmoyo, Siswantyasmoyo Soelaiman, T. A Fauzi Soelaiman, T.A Fauzi Soetanto, Maria F Sularso Sularso, Sularso Tandian, N. P Tandian, Nathanael P Winarto Winarto