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All Journal Rotasi Jurnal Simetris SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Rekayasa Mesin Jurnal Mechanical Jurnal Teknik Mesin Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin Jurnal Gema Ngabdi Techno Jurnal Karya Pengabdian Teknik Mesin Energy, Materials and Product design Jurnal Pengabdian Masyarakat Bangsa

M. Mirmanto, M.

Teknik Mesin Universitas Mataram

Author-ID : 557707

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences

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Peningkatan Kualitas Gabah Melalui Penggunaan Mesin Pengering Berbasis Energi Terbarukan di Desa Kekeri Kabupaten Lombok Barat Nusa Tenggara Barat Syahrul, Syahrul; Mirmanto, Mirmanto; Sinarep, Sinarep; Sujita, Sujita; Pandiatmi, Pandri
Jurnal Pengabdian Masyarakat Bangsa Vol. 2 No. 4 (2024): Juni
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v2i4.918

Kegiatan ini bertujuan untuk meningkatkan kualitas gabah melalui penggunaan mesin pengering yang berbasis energi terbarukan di Desa Kekeri Kabupaten Lombok Barat Nusa Tenggara Barat. Metode yang digunakan meliputi sosialisasi dan demonstrasi penggunaan mesin pengering. Demonstrasi mencakup pengoperasian mesin, perawatan, serta pemanfaatan limbah pertanian sebagai sumber energi panas. Selain itu, penyuluhan dilakukan untuk memberikan pemahaman mendalam tentang manfaat dan cara penggunaan mesin pengering dalam meningkatkan kualitas dan efisiensi pengolahan gabah. Kesimpulan yang diperoleh menunjukkan bahwa penggunaan mesin pengering signifikan dalam meningkatkan kualitas gabah, mengurangi risiko kerusakan fisik dan kontaminasi, serta meningkatkan efisiensi waktu pengeringan. Teknologi ini juga membantu petani mendapatkan produk gabah berkualitas tinggi yang memiliki daya saing lebih baik di pasaran, serta mendukung keberlanjutan lingkungan dengan pemanfaatan energi terbarukan.

Simulasi karakteristik mesin termoakustik pembangkit listrik dengan penambahan model kerugian minor dari dua segmen konis Nurpatria, N.; Mirmanto, M.; Padang, Y.A.; Nurchayati, N.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 14, No 2 (2024): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v14i2.845

Acoustic energy output level from regenerator segment of a thermoacoustic engine model is attenuated along it’s loop due to several conditions including minor losses. This article discusses the result of Delta EC simulation of a thermoacoustic engine model acting as simple electric power generator that inserted with two conical segments. The cone segments are capable to lower the energy loss which in turn improve the overall performance of the engine in term of nett heat to acoustic energy conversion efficiency. Combined acoustic energy loss induced by both cones is equivalent to 4.94 watts minor losses. At this condition, regenerator segment amplifies the incoming acoustic energy flow of 57.02 watt up to 93.57 watt, which is equals to 36.55 watts acoustic amplification. It leads to increasing of overall engines heat to acoustic efficiency into 14.05%, which is 1.29% higher than those at the case of without cones. This engine performance improvement addressed to smoother streamline of working fluid flow inside the loop.

UNJUK KERJA DISTILLER TENAGA SURYA SISTEM KONTINUE DENGAN BERBAGAI JUMLAH KACA PENUTUP Mirmanto, Mirmanto; Wirawan, Made; Sayoga, I Made Adi; Abdullah, A.; Faisal, M.
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 9, No 1 (2020)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v9i1.6965

Penelitian tentang distiller tenaga surya sistem kontinue untuk mengetahui unjuk kerja distiler tersebut telah dilakukan. Tiga buah distiller yaitu distiller dengan kaca penutup tunggal, ganda dan rangkap tiga telah dirancang dan diuji.Material yang diuji adalah air laut berasal dari pantai Tanjungkarang, Mataram, NTB yang diubah menjadi air tawar melalui proses distilasi.Ukuran distiller yang diuji adalah 1136 mm x 936 mm x 574 mm (bagian luar), sedangkan ukuran plat penyerap panasnya adalah 0,8 m x 1 m. Penelitian dilakukan pada bulan Juli 2019 dari jam 09.00 WITA hingga jam 16.00 WITA. Hasil menunjukan bahwa semakin banyak jumlah kaca penutup semakin sedikit air tawar yang diproduksi. Distiller dengan kaca penutup rangkap tiga lebih panas sehingga uap air tidak dapat mengembun. Oleh sebab itu, distiller dengan kaca penutup tunggalah yang direkomendasikan untuk digunakan.

Optimisation of Air-water Harvester Machine Performance With Variations of Inlet Air Flow Velocities Mirmanto, Mirmanto; Wirawan, Made; Tarmisi, Ahmad
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 18 No. 2 (2024): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.18.2.129-134

In the dry season, some parts of Indonesia experience drought and clean water crisis which results in scarcity and difficulty in drinking water. One way to overcome this problem is to present a water-producing device from air called a water harvester machine. The purpose of this study was to examine the effect of the inlet air velocity of 4 m/s, 5 m/s, and 6 m/s on the mass of water produced and the rate of heat transfer. This study was conducted experimentally with R134a refrigerant working fluid, and a 1 PK rotary compressor and centrifugal fan. The results showed that the highest water mass, which was 5.99 kg, was obtained at an air velocity of 6 m/s. The highest heat transfer rate, which was 2080.2 W, was also obtained at a speed of 6 m/s. This can be caused by the high inlet air velocity, the inlet air mass flow rate is also high so that the water vapor content that enters is greater. As a result, the mass of water produced is greater and the rate of heat transfer that occurs is also greater.

Heat loss from hot water flowing in a copper pipe insulated using air enclosed with a PVC pipe Albayani, A.; Mirmanto, M.; Syahrul, S.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 8, No 1 (2018): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

This paper presents investigations of heat loss from hot water flowing in an insulated copper pipe. Investigations were performed to know the heat loss from a copper pipe insulated using air enclosed with a PVC pipe. The fluid temperature used was kept at approximately 75°C in the entrance and its mass flow rate was around 12 g/s. The nominal copper pipe diameter was 6.35 mm; while the diameters of the PVC pipe were ranging from 12.7 mm to 5.08 mm. The length of the test section was approximately 3000 mm. The results show that the biggest heat loss is found using the bare copper pipe. When the copper pipe is insulated using air enclosed with a PVC pipe, the heat loss decreases with the increased PVC pipe diameters. The trend of the heat loss agrees with the critical insulation diameter theory.

Konduktivitas termal komposit resin epoksi dan serbuk arang tempurung kelapa Mirmanto, M.; Sugiman, S.; Fathurrahman, F.; Ramadhani, M.D.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 12, No 1 (2022): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Composite materials are materials that are widely developed and their use has been widespread in various industrial and household sectors. Epoxy composites filled with coconut shell charcoal powder have been tested for their thermal conductivity properties using the one-dimensional conduction method. The tested specimens had dimensions of 50 mm x 50 mm x 5 mm made of epoxy and coconut shell powder with a percentage of charcoal weight of 0%, 10%, 20% and 30%. The specimen is inserted into a thermal conductivity measuring instrument made of solid aluminum which is insulated around it. The heater is mounted on the aluminum as a heat source, while the other end is left open to the free air in the room. The results showed that the highest average thermal conductivity was a 30% variation of 0.5003 W/m°C, then a 20% variation of 0.3738 W/m°C, a 10% variation of 0.3487 W/m°C. and the lowest at 0% variation without using coconut shell charcoal powder at 0.1364 W/m°C.

Variasi persen berat tempurung kelapa terhadap konduktivitas termal komposit silicone rubber Mirmanto, M.; Sugiman, S.; Ramadhani, M.D.; Fathurrahman, F.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 11, No 2 (2021): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Experiments to know themal conductivities of silicone rubber composite were conducted. The sillicon rubber was mixed with coconut shells charcoal powder with weight variations. The weight presentage variations were 0, 10, 20 and 30%. Increasing the weight persentage was expected to increase the thermal conductivity of the composite. The speciment size was 50 mm x 50 mm x 5 mm. The speciments were tested according to the conduction heat transfer mode. To make sure that the temperatures were steady, the experiments were performed for about 6 hours. The results indicated that increasing the weight presentage raised the composite thermalconductivities. At 0% of wight, the composite had a thermalconductivity of 0.157 W/m°C, at 10%, 20% and 30% of weight compositions; the composite had thermal conductivities of 0.461 W/m°C, 0.58 W/m°C, and 0.73 W/m°C respectively.

Simulasi pemasangan sebuah model kerugian minor perubahan penampang di konektor loop mesin termoakustik Nurpatria, N.; Mirmanto, M.; Joniarta, I.W.; Padang, Y.A.; Susana, I.G.B.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i1.626

A custom-designed thermoacoustic engine model has been created with the open source Delta EC simulation software. The specific design of the engine lies in the part of the heat exchanger, which allows it to receive heat from the hot gas stream resulting from the combustion of low grade biomass directly. The engine model can be coupled with a loudspeaker model that functions as a liner alternator, resulting in a simple power generator engine model. In this study, further simulations were carried out to increase the total efficiency of converting heat energy into electricity from the previous model. After that a model of minor loss of cross-sectional change was also added to the model. In a certain set of engine model parameter values without minor losses, the efficiency of converting heat energy to acoustic energy is 12.76%, equivalent to the amplification of acoustic energy by a regenerator of 33.26 W. The total efficiency of the engine model in converting heat energy into electrical energy is 10.53%. After the addition of a sub-program of minor losses due to the effect of one conical segment, there was an acoustic energy loss of 0.11 W. So that the efficiency of converting heat energy to acoustic energy was reduced by 0.01% to 12.75%. As a result, relatively small change occur in the total efficiency of the engine model.

PENGARUH JUMLAH PIPA TERHADAP LAJU PELEPASAN KALOR PADA KOLEKTOR SURYA ABSORBER BATU GRANIT Wirawan, Made; Mirmanto, Mirmanto; Sutanto, Rudy
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 5, No 2 (2015): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (913.198 KB)

Fossil energies as un-renewable energies have been getting depletion. Therefore, the use of alternative energy should be raised. One of the alternative energies is solar energy. Solar energy does not pollute the environment and is categorized as a renewable energy which is free and plentiful. In this research, the solar energy was used to heat water by operating granite absorber solar collectors. The water was flowed naturally from a higher tank and adjusted using a valve fitted at the outlet of the collector. The volumetric rates of the water were 200, 250 and 300 cc/minutes. Two identical solar collectors with an overall dimension of 0,8 m x 1 m x 0,1 m were placed under the sun and faced to the North with an inclination angle of 15°. One collector contained 5 parallel pipes and the other comprised 7 parallel pipes. Data obtained in this research are glass cover temperatures, an ambient temperature, absorber temperatures, inlet and outlet water temperatures, and water volumetric rates. The results show that the 7 parallel pipe collector products higher outlet water temperature and energy than the 5 parallel pipe collector. Consequently, in the process of energy removal/discharge, the heat stored in the 7 parallel pipe collector runs out quicker.

Pengeringan biji jagung menggunakan pengkondisi udara Mulyanto, A.; Mirmanto, M.; Susana, I.G.B.; Alit, I.B.; Nuarsa, I.M.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

This study aims to determine the effect of air velocity on the rate of drying corn. Corn seeds were placed after the evaporator of an air conditioner, so that the air came out of the evaporator entered the drying chamber. The water in the corn was evaporated and sucked by dry cold air and then it was condensed in the evaporator. The results show that the mass of corn seeds decreases with the time; the drying rate also decreases with the time and mass-based drying rates at low air speeds are faster than at high air speed. The air conditioner can be used for drying seeds.

Co-Authors A. Abdullah A. Albayani, A. A. Maulana A. Mulyanto A.D. Catur A.D. Catur Anggani, Yudi Arief Mulyanto Arif Mulyanto Arif Mulyanto, Arif B.H. Saputra Buyung Anugerah D.F. Nansah D.K. Putra Emmy Dyah Sulistyowati, Emmy Dyah F. Pramudia Fahrurrozi, Imam Fahrurrozi, Imam Fathurrahman, F. Guna, Patar Dayu H.S. Tira Hendra Ananta, Hendra Hendra, J.K. Hendry Sakke Tira, Hendry Sakke I Gede Bawa Susana I Made Adi Sayoga I Made Adi Sayoga I Made Adi Sayoga, I Made I Made Adi Sayoga, I Made Adi I Wayan Joniarta I.B. Alit I.B. Alit, I.B. I.G.A.K.C Adhi I.M. Mara I.M. Suartika Ida Bagus Alit IGNK Yudhyadi Lalu R Hidayatullah M. Athar, M. M. Faisal M. Mara M. Wirawan M. Wirawan Made Wirawan Made Wirawan, Made Mara, M. Mari, A.K. Muhammad Athar N. Nurchayati, N. N. Nurpatria N. Nurpatria, N. Nuarsa, I.M. Nurpatria Nurpatria P. Pandiatmi Pabriansyah, A. Padang, Y.A. Pandri Pandiatmi Pandri Pandiatmi Pandri Pandiatmi Pandiatmi Patar Dayu Guna R. Kurniawan R. Romdhani, R. R. Sutanto Ramadhani, M.D. Rudy Sutanto S. Romdani, S. S. Sinarep S. Sugiman S. Sukmawaty, S. S. Syahrul S. Syahrul S. Syahrul, S. Sayoga, I.M.A. Sinarep Sinarep Sinarep Sinarep Sinarep Sinarep Sinarep Sugiman . Sujita, Sujita sutrisno, ahsani Syahrul Syahrul Syahrul Syahrul Syahrul Tarmisi, Ahmad Tira, H.S. Vayasqi, M.A. Waasi, A. Yesung Allo Padang Yesung Allo Padang, Yesung Allo Yudhyadi, I Gusti Ngurah Ketut Z. Zulkarnain, Z. Zulfitri, Z. Zulkarnain Zulkarnain

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