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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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Articles

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Effect of a Pipe Number on The Heat Transfer Rate For a Granit Stone Absorber Solar Collector M. Mirmanto
JURNAL MECHANICAL Vol 7, No 2 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

As the fossil energy has been getting depletion, it is important to utilize alternative energies such as solar energy. An equipment that can be used for capturing and converting solar energy is solar collector. Two identical collectors used in this study were placed facing to the North with an inclination angle of 15°. The collector dimension was 0.8 m x 1 m x 0.05 m. One collector contained 5 parallel pipes and the other contained 7 parallel pipes. The water used in the test was flowed naturally due to the gravity force from a higher tank and was adjusted using a valve fitted at the end of the collector. The water flow rates employed were 200, 250 and 300 cc/minutes and measured using a volume meter and a stop watch. The results showed that the energy coming into the collector, energy absorbed by the absorber and water, increased with an increase in the observation time and reached the peak value at about 2.30 pm. After that, they decreased. The effect of the pipe number is significant and the performance of the collector containing 7 pipes is better than that containing 5 pipes.

Unjuk Kerja Kotak Pendingin Termoelektrik dengan Variasi Laju Aliran Massa Air Pendingin Mirmanto Mirmanto; Rudy Sutanto; D.K. Putra
Jurnal Teknik Mesin Vol 7, No 1 (2018)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v7i1.2307

This study was taken because some conventional refrigerators still contain refrigerant comprising CFC that can support the global warming. Moreover, the construction of the conventional refrigerators is still big and heavy so that the refrigerators are difficult to be brought for traveling. The power consumed is also still high. Therefore, friendly and low power refrigerators must be invented. A refrigerator that can fulfil the criteria is thermoelectric refrigerator. However, this type of refrigerator has a low COP. This study presents the effect of mass flow rate on the cooler box performance to examine if there is an increase in the COP. The experiments used a thermoelectric module type TEC1-12706 with an overall size of 40 mm x 40 mm x 3.74 mm. The module was placed on the top side of the cooler box. The cooler box dimension was 24.5 cm x 20 cm x 28.5 cm. The data in the test were recorded using a DAQ MX 9714 NI data logger that was connected to a PC using the LabView program. The water mass flow rates used were varied; 5 g/s, 10 g / s, and 15 g/s and the electric power employed was 41,87 W. The results show that the higher mass flow rate used does not guaranty to increase the refrigerator performance. This is due to low ranges of the mass flow rates applied. Therefore, a further investigation needs to be conducted.

HUBUNGAN KETINGGIAN DAN DIAMETER LUBANG UDARA TUNGKU PEMBAKARAN BIOMASSA DAN EFISIENSI TUNGKU Mirmanto Mirmanto; Arief Mulyanto; Lalu R Hidayatullah
Jurnal Teknik Mesin Vol 6, No 4 (2017)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v6i4.2048

Energi alternatif, misalnya biomassa, dapat dimanfaatkan dengan menggunakan proses pembakaran di dalam tungku. Kendati demikian, tungku tradisional yang tersedia di pasaran atau yang sudah dimanfaatkan masyarakat selama bertahun-tahun efisiensinya masih rendah. Variabel-variabel yang dapat mempengaruhi efisiensi adalah jarak antara ruang bakar dengan lubang masuk udara dan diameter lubang udara. Oleh karena itu, penelitian ini meneliti pengaruh jarak lubang udara dan dan diameter lubang udara terhadap efisiensi tungku. Pengujian dilakukan menggunakan jarak antara ruang bakar dengan lubang udara 30 cm, 40 cm dan 50 cm dan diameter lubang udara 5 cm dan 10 cm. Diameter ruang bakar adalah 13 cm dan diameter bagian atas dari tungku 19 cm. Bahan bakar yang digunakan adalah tempurung kelapa dengan ukuran bervariasi antara 2 cm sampai dengan 4 cm. Pengujian dilakukan dengan memanaskan air dalam panci berdiameter 22 cm dari suhu lingkungan sampai mendidih (100°C). Parameter yang diteliti adalah kinerja tungku yang terdiri dari lama waktu mendidih, FCR, input daya, output daya, kehilangan daya dan efisiensi. Hasilnya menunjukkan bahwa waktu pendinginan tercepat adalah 337 detik dan FCR tertinggi adalah 1,61 kg /jam yaitu yang dihasilkan dengan tungku dengan diameter lubang 10 cm dan jarak lubang udara dari ruang bakar 50 cm. Efisiensi tertinggi 13,92% dicapai oleh tungku dengan jarak lubang udara 30 cm dan diameter lubang udara 5 cm.

Pengaruh jumlah haluan pipa paralel pada kolektor surya plat datar absorber batu kerikil terhadap laju perpindahan panas M. Wirawan; R. Kurniawan; Mirmanto Mirmanto
Dinamika Teknik Mesin Vol 6, No 2 (2016): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Recently the use of energy increases. It leads to the energy crisis. Therefore, it is important to promote alternative energy (renewable energy). One of renewable energies, which is potential in Indonesia, is solar enrgy. Solar energy can be harvested using a solar collector. This device can collect or absorb solar radiation and convert it to thermal energy. In this study, two identical collectors are used. One collector consists of 7 pipes and the other comprises 9 pipes. The overall dimension of the collector is 100 cm x 80 cm x 10 cm and the absorber of the collector is made of gravels with a mesh size of 9.5 -12.5 mm. The collectors are placed with a slope of 15o facing to North. The volumetric rates of water used in the experiments are 300 cc / min, 350 cc / min and 400 cc / min. The results show that the collector with 9 pipes is better than that with 7 pipes.

PENGARUH KETINGGIAN LUBANG UDARA PADA TUNGKU PEMBAKARAN BIOMASSA TERHADAP UNJUK KERJANYA Arif Mulyanto; Mirmanto Mirmanto; Muhammad Athar
Dinamika Teknik Mesin Vol 6, No 1 (2016): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Alternative energies, e.g. biomassa, can be utilized using combustion processes in a stove. Nevertheless, traditional stoves that are available in the market or have been used by the community for years are not effective and efficient. One thing that may affect their efficiency and effectiveness is a distance between the combustion chamber and air hole. Therefore, this research investigates experimentally the effect of the distance.The tested stoves had identical combustion room and air hole diameters, but the distance between the combustion chamber and air hole was varied 10 cm, 20 cm, 30 cm, 40 cm. The combustion chamber diameter was 13 cm and the top diameter of the stove was 19 cm. The fuel employed was coconut shell with various size of 2-4 cm and 5-10 cm. One traditional stove was also tested as a comparison. The test were conducted by heating the water in a 18 cm diameter pan from the ambient temperature to the boiling temperature (1000C). Investigated parameters showing the stove performance were boiling time, FCR, heat input, heat output, heat losses and efficiency.The results show that the fastest boiling time (472 s) and the highest FCR (0,9407 Kg/h) were resulted in the stove with the air hole distance of 40 cm and coconut shell size of 5-10 cm. In this stove, the highest heat input, heat output, heat losses occurred too. On the other hand, the highest efficiency (15,62 %) was achieved in the stove with the air hole distance of 10 cm.

PENGARUH SUSUNAN PIPA LALUAN TERHADAP PEMANFAATAN KALOR PADA KOLEKTOR SURYA PELAT DATAR ABSORBER GRANITE Made Wirawan; M. Mirmanto; I Gede Bawa Susana; Rudy Sutanto
Dinamika Teknik Mesin Vol 5, No 1 (2015): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (197.653 KB)

The collector of solar energy can be used for heating fluidssuch as liquid or gas. The optimize absorbtion of solar energy depends on the collectordimention and component, e.g.the width, body of collector, tube formation, cover and isolation system. This research usesa granite absorber with a variation of tube formations and water flow rates. The aim of the research is tofind out the optimal tube formation. To achieve the aim of the research,theexperiments of water heating usingthree collectorswith a granite absorber 80 Cm x 100 Cm and three way tube formatians have been done.The variation of water flow rates had beenperformed toinvestigate the maximal performance. The water flow rates used were200, 250 and 300 cc/minute.The result of research achieved value of heat utilization of solar collector influenced by: arrangement inlet tube, flow rates of water and time. The maksimal heat utilization occur at parallel 7 for each flow rate. The flow rate 300 cc/minute show maximal heat utilization.

Pengukuran waktu standar pembuatan produk sampan komposit sandwich untuk menentukan biaya poduksi I.M. Suartika; A.D. Catur; M. Mirmanto
Dinamika Teknik Mesin Vol 11, No 1 (2021): Dinamika Teknik Mesin
Publisher : Universitas Mataram

In the efforts to develop the boat of composite sandwichto overcome the scarcity of wood as a boat material, thedetermination of production costs becomes veryimportant to be studied. The purpose of this study is toconduct a study related to the amount and time requiredin the completion of product units with the stop watchtime study method. The results of the time study wereused to determine the cost or wages of labor in theproduction of the boat composite sandwiches. So that allcomponents of these costs will later determine thefeasibility of production of the boat composite sandwichproducts. Based on the results of the measurement ofwork time study known standard time production of theboat composite sandwich with two people labor and shiftwork 8 hours / day is 34 hours (equivalent to 5 days) andproduction capability 5 units / month. The results ofresearch related to production process costs are knownfixed costs (FC )= Rp. 1,288,655 and variable costs /units (c) = Rp. 2,664,333. By conducting break-evenpoint analysis obtained minimum production units permonth that can be produced by setting the selling price( ) of the product based on profit margin 5%, 10%,15%, 20%, 25%, i.e consecutively; 10 units/month, 5units/month, 4 units/month, 3 units/month, 2 units/month.

Sampul Dinamika Teknik Mesin, vol. 9, no. 1, Januari 2019 M. Mirmanto
Dinamika Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (260.947 KB)

Sampul Dinamika Teknik Mesin, vol. 9, no. 1, Januari 2019

PREDIKSI DAN PENGUKURAN KERUGIAN TEKANAN AIR MENGALIR DI DALAM SALURAN MIKRO SEGI EMPAT M. Mirmanto
Dinamika Teknik Mesin Vol 3, No 2 (2013): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (717.257 KB)

This paper presents experimental results of pressure drop measurement and prediction of water flowing through a copper rectangular microchannel with a hydraulic diameter of 437 µm. The aim of this work is to identify discrepancies between experimental data and macrochannel theory. An inlet temperature of 60oC was kept constant at the channel entrance and the experiments were performed with Reynolds numbers (based on the mean velocity and hydraulic diameter) ranging up to 4500. The results show that the pressure drop prediction agrees with the theory. However, the trend of Poiseuille number with the Reynolds number was not constant for laminar flow. This could be due to the entrance effect. Moreover, the friction factor theory could predict the experimental data for turbulent flow. Thus, in this experiment, the theory for flow in macro passages is still applicable.

Effect of mass variation of material on continuous vertical type drying machines against drying time S. Syahrul; D.F. Nansah; A. Mulyanto; M. Mirmanto
Dinamika Teknik Mesin Vol 10, No 2 (2020): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Post-harvest handling of grain before being ground or stored for a long time is drying or reducing water content. To dry the grain is more effective by using a mechanical dryer. In this study, grain drying was carried out using a continuous vertical dryer by varying the grain mass to determine the effect of grain mass variation on the grain drying time. Mass variations observed were 10 kg, 20 kg, 30 kg, 40 kg, 50 kg, 60 kg, with an air temperature of 50°C and an air velocity of 7 m/s. The result showed that the more grain mass the lower the drying rate. However, the drying time was longer, and the efficiency was higher. At the 10 kg, the fastest drying time was 75 minutes. Whereas at the 60 kg, the maximum drying time was 150 minutes. The highest efficiency of 8.78, occured at a mass of 60 kg and the lowest efficiencywas 1.6% occured at a mass of 10 kg.

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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