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ANALISIS THERMAL DAN REDESAIN ALAT PENGERING KAKAO MENGGUNAKAN COMPUTATIONAL FLUID DYNAMICS (CFD) DI USAHA MANDIRI DESA WIYONO KABUPATEN PESAWARAN Yudi Risano; Husein Manalu; Dyan Susila
Jurnal Informatika dan Teknik Elektro Terapan Vol 10, No 2 (2022)
Publisher : Universitas Lampung

Usaha Mandiri di desa Wiyono Kabupaten Pesawaran merupakan salah satu bentuk usaha yang bergerak di bidang pengolahan kakao melalui proses pengeringan dengan alat pengering sederhana berukuran panjang 2,4 m, lebar 1,2 m dan tinggi 0,6 m. Untuk meningkatkan efektifitas alat pengering yang digunakan dan meningkatkan kualitas hasil pengeringan, maka dilakukan penelitian dengan pertama-tama dilakukan analisis perpindahan panas, laju aliran panas dan distribusi temperatur yang terjadi di dalam alat pengering tersebut. Selanjutnya dari hasil yang diperoleh, dilakukan proses redesain alat pengering. Dalam proses redesain alat pengering berdasarkan perhitungan termal, sebaran suhu dan laju energy panas yang terjadi di dalam ruang pengering serta waktu pengeringan yang dibutuhkan dan kebutuhan bahan bakar (kayu bakar). Tahap selanjutnya, hasil redesain alat dianalisis kembali terutama distribusi temperatur yang terjadi dengan simulasi pemodelan menggunakan Computational Fluid Dynamics (CFD). Dari hasil perhitungan dan simulasi CFD didapatkan suhu rata-rata pengeringan sebesar 85,34 oC, kalor yang dibutuhkan selama proses pengeringan 420.062,32 kJ, waktu yang dibutuhkan dalam pengeringan 16 jam dan bahan bakar yang diperlukan sebanyak 102,96 kg atau 0,11 m3 .

Kaji Eksperimental Pengaruh Pemasangan Photovoltaic Pada Dinding Bangunan Terhadap Temperatur Ruangan M. Dyan Susila; A. Yudi Eka Rosano; Mei Hartanto
JURNAL MECHANICAL Vol 6, No 1 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v6.i1.201501

Daerah perkotaan banyak sekali gedung bertingkat baik untuk perkantoran maupun pusat bisnis, dengan model dinding beton maupun kaca. Bagian bangunan secara umum mendapat sinar matahari baik secara bergiliran maupun terus menerus sepanjang siang hari. Penyinaran tanpa hambatan ini akan meningkatkan kalor yang masuk ke dalam ruangan dan beban pendingin ruangan akan meningkat, sehingga konsumsi energi listrik juga akan bertambah. Salah satu upaya mengatasinya dengan pemasangan photovoltaic. Untuk mengetahui pengaruh pemasangan PV terhadap temperatur ruangan dilakukan kajian eksperimental dengan mensimulasikan intensitas berasal dari cahaya lampu ultrasonik. Penelitian ini dilakukan pada model bangunan, dimana PV dipasang pada dinding dengan sudut pemasangan 150 dan posisi lampu penyinaran dengan sudut 00, 300, dan 600. Parameter yang diuji adalah temperatur PV, temperatur luar dan dalam dinding serta temperatur ruangan. Hasil pengujian ini akan dibandingkan dengan variasi intensitas cahaya lampu yakni 500 watt dan 1000 Watt. Hasil penelitian memperlihatkan bahwa pemasangan PV pada dinding bangunan dapat memperlambat kenaikan temperatur ruangan. Pemasangan PV dengan posisi miring, memberikan pengaruh positif terhadap pengurangan laju pemanasan ruangan.Kata Kunci: photovoltaic, temperatur, intensitas cahaya

APLIKASI MINYAK KELAPA SAWIT PADA PHOTOVOLTAIC YANG TERINTEGRASI PADA DINDING BANGUNAN SEBAGAI PENDINGIN PASIF UNTUK MENINGKATKAN EFISIENSI DAN MENURUNKAN BEBAN PENDINGIN RUANGAN A Yudi Eka Risano; M Dyan Susila E S; Yoga Pratama
TURBO [Tulisan Riset Berbasis Online] Vol 6, No 1 (2017): Juni 2017
Publisher : Universitas Muhammadiyah Metro

Menanggapi isu green building dan penggunaan clean energy yang sangat santer saat ini, pemanfaatan energi terbarukan menjadi meningkat. Penggunaan energi surya menggunakan photovoltaic (PV) pada sistem Building Intergated Photovoltaics (BIPV) akan menambah pasokan listrik dan mengurangi ketergantungan terhadap pembangkit listrik. Menurut M. Farid dan Abhat A. Low dalam jurnal MONEV Muhammad Irsyad, Penambahan Minyak Kelapa Sawit pada Photovoltaic yang Terintegrasi pada Dinding Bangunan untuk Meningkatkan Efisiensi dan Menurunkan Beban Pendingin Ruangan (2012), persoalan tiap kenaikan 1oC temperatur PV yang mengurangi efisiensi PV 0,4 – 0,5% dapat disiasati dengan integrasi Phase Change Material (PCM). Selain itu dengan sifatnya sebagai pendinginan pasif, masuknya kalor ke dalam ruangan juga akan direduksi. Penelitian ini dilakukan untuk melihat karakteristik efisiensi PV dan perambatan kalor pada ruangan model BIPV yang diintegrasikan dengan PCM CPO. Pengujian dilakukan dengan membandingkan dua model BIPV yang dengan dan tanpa PCM CPO. Variasi dilakukan dengan kemiringan BIPV 45º dan 30º masing-masing orientasi timur dan barat. Setelah dilakukan empat variasi percobaan, BIPV dengan kemiringan 30º lebih unggul dibanding dengan kemiringan 45º. Perbandingan perpindahan panas dinding dalam menuju ruang BIPV dengan PCM CPO kemiringan 30º orientasi barat lebih signifikan dan stabil, terutama pada intensitas 850 W/m² perbandingan panas dari dinding dalam menuju ruang yang sebesar 0,4012 W dapat diredam dengan menggunakan CPO hanya sebesar 0,2596 W. Kemudian pada puncak perpindahan panas tertinggi dari dinding dalam ke ruang model BIPV tanpa CPO dengan intensitas 923 W/m² mencapai 0,43426 W, dengan penambahan PCM CPO hanya 0,25913 W. Perbedaan efisiensi dengan pemakaian PCM CPO juga lebih unggul hingga menaikkan efisiensi 5,75% saat intensitas 982 W/m² sudut penyinaran 120 º dari timur.Kata kunci : green building, clean energy, photovoltaic, Bahan Perubah Fasa, Minyak Kelapa Sawit, pendingin pasif.

Pemanfaatan material fasa berubah untuk mempertahankan kesegaran sayuran Muhammad Irsyad; Natal Andreas H L Tobing; M Dyan Susila
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1295

Indonesia is an agricultural country with a tropical climate. One of the many agricultural products in Indonesia is vegetables. Handling of vegetables after harvesting is important because the decrease in product quality can reach up to 50%. This decrease in quality is the result of metabolic processes such as transpiration and respiration that occur in post-harvest vegetables. The respiration rate of vegetables cannot be stopped but can be slowed down by lowering the temperature, so that the freshness of the vegetables can last longer. One method of maintaining the temperature of vegetables is storage in a cool box with cooling media. Phase change material (PCM) is an alternative cooling medium that utilizes latent heat in thermal energy storage. Paraffin is a PCM that can be used for this application. Paraffin has a freezing and melting temperature range that can be adjusted according to your needs, namely by mixing liquid paraffin and solid paraffin. This study used mixed paraffin with a liquid-solid paraffin ratio of 98:2 mass basis. This mixture has a melting temperature of 6o C until 13 C and is close to the optimal temperature for storing vegetables, which is 5o C. In this study, testing was also carried out using water as a comparison. The test results show that ice can make vegetables last longer in cold conditions, namely that it is able to maintain the vegetable temperature below 20o C for 11 hours, while paraffin only lasts 2 hours. The physical condition of the vegetables that are cooled with ice in the packing changes color and becomes watery because the water in the vegetables is condensed. Meanwhile, on cooling with paraffin it is physically fresher.Keywords: PCM, paraffin, cool box, fresh vegetable storage

Activation of Natural Zeolite Mixture and Coal Flyash Using Microwave as Air Filter for the Improvement of Gasoline Four-Stroke Motorcycle Engine Acceleration Risano, A Yudi Eka; Wardono, Herry; Renardy, B Niko; Susila, M Dyan; Sugiri, Agus; Haviz, Muhammad
Journal of Applied Science, Engineering and Technology Vol. 4 No. 1 (2024): June 2024
Publisher : INSTEP Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/jaset.v4i1.70

Combustion is a chemical process between fuel and oxygen utilizing heat. Ambient air contains a variety of gases such as nitrogen, oxygen, and other gases, causing incomplete combustion in the combustion chamber of a 4-stroke petrol engine. The use of artificial air filters with zeolite-flyash composition activated by microwave can adsorb the air that enters the combustion chamber. So that it can improve the quality of combustion. Zeolite is a mineral that is found in limestone mountainous areas, while coal flyash is material from coal combustion at PLTU. Both of these materials have the ability to adsorb molecular sized particles such as nitrogen, CO and water vapor in the air, so the use of both materials is able to produce air with rich oxygen. The performance of the 4-stroke petrol engine is influenced by a decrease in fuel consumption, able to increase acceleration, and reduce exhaust emissions containing CO and HC. To find out the effect of the use of activated zeolite-flyash filters on engine performance, an acceleration test of 0-60 kph was performed. Filter being activated by Microwave with 80% power, 6 minutes activation time, and density (variation in the number of pellets in the filter) 50%, 75%, 100%, and use the Z0: F100, Z25: F75, Z50: F50, Z75: F25, Z100: F0. The best filter is the composition of Z100:F0 with a compactness of 50% able to increase acceleration by 7.17%, followed by filter with composition of Z25:F75 with a compactness of 50% able to increase acceleration by 4,04%.

Analysis of PM2.5 Level Related to Vehicle Activities in Campus Parking Lot Panuju, Achmad Yahya Teguh; Susila, M Dyan; Wahono, Endro Prasetyo; Sulistiyanti, Sri Ratna; Ibrahim, Gusri Akhyar
Jurnal Inovasi Teknologi Vol 5 No 2 (2024): October
Publisher : Engineering Forum of Western Indonesian Government Universities Board (Forum Teknik, BKS-PTN Wilayah Barat) Indonesia

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The number of vehicle usage, especially motorcycles, in Indonesia has significantly increased in the past 10 years, particularly among young people. This has had an impact on the declining air quality in public places, including on campus grounds. PM2.5, as one of the hazardous pollutants to health, needs to be given special attention regarding its dispersion concentration in areas heavily frequented by the public, such as parking lots on campus. This study analyzes the level of PM2.5 concentration in the campus parking lots at Universitas Lampung, with the aim of observing the pattern of PM2.5 pollution in the campus area, considering the increasing number of motorcycles entering the campus every year. The measurement of PM2.5 levels was conducted using a light scattering sensor in two parking lots with different microenvironments, and then its correlation with motorcycle activities at each location was analyzed using simple regression. Based on statistical analysis, it was found that the differences in microenvironments affect PM2.5 levels significantly. The number of motorcycle activities also has a positive correlation with the level of PM2.5, where the average PM2.5 concentration recorded has exceeded the threshold set by the government, which is 15 µg/m3 per day. However, the effect of the microenvironment in this study is stronger than the number of vehicles. Therefore, in the future, appropriate policies and strategies are needed to reduce PM2.5 concentrations in public areas, especially on campuses, to prevent the associated risks of the pollution.

Analysis of PM2.5 Level Related to Vehicle Activities in Campus Parking Lot Achmad Y T Panuju; Susila, M Dyan; Wahono, Endro P; Sulistiyanti, Sri R
Jurnal Inovasi Teknologi Vol 5 No 2 (2024): October
Publisher : Engineering Forum of Western Indonesian Government Universities Board (Forum Teknik, BKS-PTN Wilayah Barat) Indonesia

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

The number of vehicle usage, especially motorcycles, in Indonesia has significantly increased in the past 10 years, particularly among young people. This has had an impact on the declining air quality in public places, including on campus grounds. PM2.5, as one of the hazardous pollutants to health, needs to be given special attention regarding its dispersion concentration in areas heavily frequented by the public, such as parking lots on campus. This study analyzes the level of PM2.5 concentration in the campus parking lots at Universitas Lampung, with the aim of observing the pattern of PM2.5 pollution in the campus area, considering the increasing number of motorcycles entering the campus every year. The measurement of PM2.5 levels was conducted using a light scattering sensor in two parking lots with different microenvironments, and then its correlation with motorcycle activities at each location was analyzed using simple regression. Based on statistical analysis, it was found that the differences in microenvironments affect PM2.5 levels significantly. The number of motorcycle activities also has a positive correlation with the level of PM2.5, where the average PM2.5 concentration recorded has exceeded the threshold set by the government, which is 15 µg/m3 per day. However, the effect of the microenvironment in this study is stronger than the number of vehicles. Therefore, in the future, appropriate policies and strategies are needed to reduce PM2.5 concentrations in public areas, especially on campuses, to prevent the associated risks of the pollution.

PENGARUH PENAMBAHAN ZAT ADITIF ALAMI PADA BENSIN TERHADAP PRESTASI SEPEDA MOTOR 4-LANGKAH Saputra, Wahyu Eko; Burhanuddin, Harmen; Susila, M.Dyan
Jurnal Ilmiah Teknik Mesin FEMA Vol. 1 No. 1 (2013)
Publisher : FT UNILA

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The quality fuel affects combustion because the fuel quality will get better combustion. Therefore, it is necessary to improve the quality of the fuel to produce combustion. Such an increase in the octane rating of the fuel can result in increased good quality of the fuel. One method used is the addition of natural additives in the fuel. Tests were performed using a motorcycle test engine 100 cc 4-stroke is running test (road test and acceleration), and stationary testing. The test road test conducted by a distance of 10 km with an average speed of 50 km / h test aims to get the value of fuel consumption. Furthermore, using the acceleration test speed 0-80 km / h and 40-80 km / h which aims to get the fastest acceleration time. Then the stationary testing done on rotation 1.000 rpm and 3.000 rpm with a 5-minute aims to get the value of fuel consumption at rest. This test uses a natural variation in the dose of the gasoline additive used is 1:4, 1:6, 1:8, and 1:10. On testing fuel consumption with the distance 10 km can be seen that the concentration of 1:6 is the best concentration that can reduce fuel consumption by 23,31% (136 ml), compared with natural gasoline without additives (177,333 ml). Average time acceleration 0-80 km / h resulted in the concentration of the best natural additives 1:4 that is with an average acceleration of 10,847 seconds (20,69%). In testing acceleration 40-80 km / h obtained for the concentration of 1:8 with an average acceleration of 6,993 seconds (21,83%). Tests of stationary fuel consumption at 1,000 rpm for 5 minutes in to the best performance at a concentration of 1:8 that is 33,91% (12,667 ml) whereas at 3.000 rpm stationary best performance is obtained at a concentration of 1:10 30,71% (14,334 ml).Keywords : fuel, natural additives, engine performance.

POTENSI PRODUKSI MINYAK ATSIRI DARI LIMBAH KULIT KAYU MANIS PASCA PANEN Susanti, Neni; Gandidi, Indra Mamad; Susila ES, M.Dyan
Jurnal Ilmiah Teknik Mesin FEMA Vol. 1 No. 2 (2013)
Publisher : FT UNILA

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Kayu manis (Cinnamomum burmanii BL) is known and cultivated for its aromatic content. In the previous experiment the powder of kayu manis leather can be extracted to be atsiri oil. And the rubbish like; leaf, scrap, the powder from cutting tree, trank are the parts of wood leather that haven’t been used yet, so it will be appear as a problem for the environment. If the rubbish are extacted by steam and water destilation it will produce atsiri oil with good quality and good cost, as a mix ingredient of medicine beverages, food, and parfume. The experiment goal is to filter by using arrange destilation tool to get output the process is an optimal rendeman atsiri oil. An the extract metode used is steam and water destilation. To get a good filter output should be treated by parameter variety suitable with test tool performance they are; pressure variety (1 atm; 1,65 atm; 1.85 atm), temperatur (99oC; 114oC; 119oC) and resident time (1 hour; 2 hour; 3hour). The result of the testing is an output of the most atsiri oil, it is at pressure 1,85atm, the ingredient weigh is 750 gram, and the resident time 3 hour. Where, the maximum percentage rendeman from the leaf, powder, and scrap until 1,63 %; 1,49%; and 1,42%. Atsiri oil has not reached optimum point, because the pressure has not been optimal and the capacity of the tank is limited. The percentage rendeman up to 1% can give chance for the rubbish of kayu manis to be processed become atsiri oil. So that, this research can be continue by project for study of home industry.Keywords : Destilation process, atsiri oil, kayu manis, the rubbish of kayu manis leather.

Pengaruh Penggunaan Tabung Induksi Terhadap Konsumsi Bahan Bakar Sepeda Motor Bensin 4 Langkah Supratman, Junaidi; Wardono, Herry; Susila, M.Dyan
Jurnal Ilmiah Teknik Mesin FEMA Vol. 1 No. 3 (2013)
Publisher : FT UNILA

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YEIS tube (Yamaha Energy Induction System) has been able to enhance the performance of the motorcycle. Therefore, the use of induction tube on a 4-stroke motorcycle is expected to be able to increase the volumetric efficiency of the suction stroke, so that the power (acceleration) of the engine can increase at low speed. Tests of using induction tubein a 4-stroke motorcycle is required to observe the effect of the induction tube position on its performance and emission.the engine performance tests were carried out in road tests at an average speed of 40 kph. It was conducted before and after using the induction tube, and the induction tube mountings on intake manifold were varied at positions of JS150 (15 mm from intake manifold), JS 375 (37,5 mm), and JS600 (600 mm). Each type of test was performed 3 times to get it’s average.From the results, it was found that the fuel consumption of the motorcycle could maximally reduce by 27.8% in mounting JS150 and the lowest engine consumption by 0.98% in mounting the intake manifold JS 600. The best result occurred in mounting of JS150 for all tests. JS150 is the optimal position. This due to JS150 is the closest position from intake manifold and the most farthest position from carburettor. Therefore, at mounting of JS150, residual air and fuel mixture can be fully drawn into both the line and tube of the induction tube. In contrast,JS600 is the farthest position from intake manifold, so that the residual air and fuel mixture cannot fully be drawn into the line and tube of the induction tube, the mixture is partially drawn into carburettor and induction tube, as in branched pipe system.Keywords : induction tube, petrol engine performance, YEIS.

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