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All Journal Jurnal Mechanical Jurnal Ilmiah Teknik Mesin Jurnal Abdimas Kartika Wijayakusuma Jurnal Inovasi Pembangunan
Indra Mamad Gandidi
Jurusan Teknik Mesin, Fakultas Teknik Universitas Lampung
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Analisa Perpindahan Panas Konveksi Aliran di Atas Permukaan Berkas Pipa: Sebuah Kajian Literatur Indra Mamad Gandidi
JURNAL MECHANICAL Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Heat transfer in flow across bank of tubes is of particular importance in the design of heat exchangers. Heat exchangers are found in numerous industrial applications, such as steam generation in a boiler or air cooling in the coil of an air conditioner. The Zakauskas’s correlation from the experimental data is more popular method that used to design of cross flow of heat exchanger. However, due to optimization process and more efficiency, several empirical equations were generated through the analytical and CFD methods. Hence, this paper was intended to perform a comprehensive study to analyze the heat transfer calculation of cross flow heat exchanger by using several methods in which it has been reported. Among of four methods are analyzed, the analytic method, normalization equations from CFD and Grimison’s correlation have good agreement to used for design of cross flow heat exchanger with the compact and non-compact configuration, while correlation of Zakauskas is only suitable for non-compact configuration.
Simulasi Proses Torefaksi Sampah Sistem Kontinu Menggunakan Software Aspen Plus Amrul Amrul; Dedi Triyadi; Indra Mamad Gandidi
JURNAL MECHANICAL Vol 10, No 1 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v10.i1.201904

Abstract

Perancangan, Pembuatan, dan Pengujian Pembangkit Listrik Energi Biomassa Rachmat Cahaya Putra; Indra Mamad Gandidi; Harmen Burhanuddin
Jurnal Ilmiah Teknik Mesin Vol 1, No 2 (2013): Jurnal FEMA Vo.1 No.2 Tanggal 10 April 2013
Publisher : Jurnal Ilmiah Teknik Mesin

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Abstract

This paper describe about designing and testing laboratory-scalebiomass energy power plant, toprovideelectricityin remote areasand islandswhich utilizerenewable energyin accordancewith thepresident decreeNo.5/2006. The power plantis built with gasificationreactorwhich designedbased onImbertdowndraftgasifier, integrated gas cleaned up system (IGCS) include cyclones, venturiscrubbersrectangulartype, and a new gas cleaner which called rotaryseparator. Experiments carried out withthe parametersof gasificationsystemsAFR0.48,0.5, 0.54,scrubbingwater flow 1.26, 2.62, 3.33l/min, rotaryseparator suction speed about 0.9,3.4,4.4 m/s. Each of parameters was interacted to producecleanproducer gas which free from tarandimpurities, as wellas ahigh calorificvalue as fuelgasgenerator. The result of experiment and literature review shows thatthecurrentgasificationAFR about 0.54still far enough from ideal rice husk gasification AFRabout 1.5. Eventhough, the remaining taris stillrelativelyhigh at3788.1mg/m3. AfterIGCSinstalled,the tarcan be significantly reducedto210.45mg/m3, with thescrubbingwater flow3.33l/min, and4.4 m/s suction speed of rotaryseparator. In addition, theelectric powergeneratedis stillbelow 100W,so installationshouldbe modifiedagain, especially in thesector ofair supply tothe reactor.Keywords : electricity crisis, biomass gasification, biomass energy power plant.
KAJIAN EKSPERIMENTAL GAS CLEANER YANG DIMODIFIKASI UNTUK MENGEKSTRAK TAR DALAM PRODUCER GAS Candra Aditia Agustian; Indra Mamad Gandidi; Harmen Burhanuddin
Jurnal Ilmiah Teknik Mesin Vol 1, No 2 (2013): Jurnal FEMA Vo.1 No.2 Tanggal 10 April 2013
Publisher : Jurnal Ilmiah Teknik Mesin

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Abstract

Producer gas from biomass gasification consists of tar from pyrolysis process which is notdegradation thermal well before out from the reactor. In fact tar is a serious problem that must beconsidered in the process of gasification, especially for an internal combustion engineapplication.Gas cleaning system is one the methods to reduce the tarproduced in gasificationprocess. The research purpose which is to design a purify device for the producer gas which isintegrated and also to know the influence of gas speed and water debit towards tar getting asmeasurement research of IGCS. The research does by using reactor with diameter dimension 0,8 mand 1,5 m high. The result of this research getting the gas speed for the cyclone about 2,4 m/s andflow of water in venturi scrubber 3,3 l/min, collected tar is 12 gram with 66,67 % cyclone efficiencyand 10 gram with 44,44 % venturi scrubber efficiency. Meanwhile, rotary separator gas speedabout 2,6 m/s, it is able to reduce 10 gram tar with 55,56 % efficiency. The result from combinetesting show that the tar left in producer gas is only 210 mg/m3 with 94,4 % efficiency.Keywords : Gasifikasi Biomassa, Gascleaning, IGCS, Tar
POTENSI PRODUKSI MINYAK ATSIRI DARI LIMBAH KULIT KAYU MANIS PASCA PANEN Neni Susanti; Indra Mamad Gandidi; M.Dyan Susila ES
Jurnal Ilmiah Teknik Mesin Vol 1, No 2 (2013): Jurnal FEMA Vo.1 No.2 Tanggal 10 April 2013
Publisher : Jurnal Ilmiah Teknik Mesin

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Abstract

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.
Studi Reduksi Beban Termal ke Dalam Ruangan Secara Konveksi dengan Sistem Underground Thermal Storage Sebagai Altenatif untuk Mendinginkan Ruangan Rumah Hunian Indra Mamad Gandidi
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Space cooling is required all year around in the tropics area especially Indonesia. To provide the space cooling requirement, the electricity cost and environment impact are important aspect that  it must be considered. The household in the tropical area is real conditions  require a cooling device and greatest potential to use alternative cooling.  In fact, solar radiation over the roof surface can be thrown to the environmental by convection mechanism in order to the room can be remaining in comfortable condition.The experimental investigation was performed to two model of household. That is household without and  using evaporator, respectively. Also in this reasearch, evaporator was placed in two location, over and or under surface of the roof.  Water from underground thermal storage is used as a working fluid to pick up amount of heat over the roof and then rejected on thermal storage environment. The mesurement of experimental data was conducted start from 08.00 WIB to 17.00 WIB. Roof temperature will fluctuation with raise of time start from the morning to evening. The maximum temperature difference between household without and with evaporator are ± 12 0C with water mass flow rate 0.0125 kg/s and ± 8 0C with water mass flow rate 0.0187 kg/s for evaporator over and under the surface of the roof respectively.This research result have still uncomfortable condition for household. However, this research can be used as an initial step to build up a cooling system with low cost of electrical power and environmental friendly. Moreover, thermal reduction on the wall and the window to increase in the performance of this method are necessary. Then,  the impromevent of roof geometry has to performed to keep the maximum interface area of heat transfer.  Keywords: convection mechanism, space cooling, household
Produksi Bahan Bakar Minyakbio (Bio Oil) dari Sampah Kota Bandar Lampung dengan Metode Pirolisis Sebagai Solusi Terbaik dalam Manajemen Pengelolaan Sampah dan Diversifikasi Energi Ali Mustofa; Indra Mamad Gandidi; Andicha Aulia Putra; Reno Raines
Inovasi Pembangunan : Jurnal Kelitbangan Vol 5 No 02 (2017): August 2017
Publisher : Balitbangda Provinsi Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (274.693 KB)

Abstract

The waste load produced by the community of Bandar Lampung city was 3.083 m3 per day or equivalent to 688 tons/day of wet waste with moisture content of approximately 60 %. In its management, the City Government of Bandar Lampung was using open dumping practices that were no longer relevant. On the other hand, waste was known to have stored energy in the form of chemical bonds between carbon molecules, hydrogen and oxygen molecules. When chemical bonds disrupted, the waste released chemical energy in the form of gases, liquids and solids commonly called biofuel. The research done using Bandar Lampung city wastes with pyrolysis technique producedliquid fuel with quality above diesel oil and below premium with yield or rendementabout 20.4%. Of the total drywaste 344 ton/day, Bandar Lampung citycouldproduce liquid fuel (bio-oil) around 68.8 ton/day or equal to 86.000 l/day. If it was assumed that the price of pyrolytic liquid fuel was Rp3000/l, then the return could be about Rp258000000/day. The financial calculations in this study indicated that if the pyrolysis machine is operated at the kelurahan level, the BEP was achieved within 8.5 months.
Memberdayakan Pendidik di Era AI: Identifikasi dan Edukasi Kesadaran Guru terhadap Teknologi AI dalam Dunia Pendidikan Gandidi, Indra Mamad; Mahmudatussa'adah, Ai; Sukrawan, Yusep; Nandiyanto, Asep Bayu Dani; Fiandini, Meli; Ragadhita, Risti
Jurnal Abdimas Kartika Wijayakusuma Vol 6 No 2 (2025): Jurnal Abdimas Kartika Wijayakusuma
Publisher : LPPM Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jakw.v6i2.904

Abstract

Proyek layanan masyarakat ini bertujuan untuk meningkatkan pemahaman dan kesiapan publik terhadap integrasi Kecerdasan Buatan (AI) dalam pendidikan dengan mempromosikan literasi AI dasar di kalangan pendidik dan siswa. Program ini secara khusus berfokus pada upaya mengungkap misteri teknologi AI dan menumbuhkan kesadaran kritis tentang implikasi etis, pedagogis, dan praktisnya dalam lingkungan belajar. Metode ini melibatkan serangkaian lokakarya interaktif dan sesi pelatihan langsung yang ditujukan kepada guru, calon guru, dan siswa sekolah menengah atas. Kegiatan ini dirancang untuk memperkenalkan konsep AI mendasar, mengeksplorasi aplikasi dunia nyata, dan memberikan pengalaman terbimbing dalam menggunakan alat berbasis AI yang mudah diakses untuk tujuan pendidikan. Hasilnya menunjukkan peningkatan signifikan dalam kesadaran dan pemahaman peserta tentang AI, sebagaimana tecermin dalam survei pra dan pascaprogram. Pendidik melaporkan kepercayaan diri yang lebih besar dalam membahas topik AI di kelas dan menunjukkan peningkatan keterampilan dalam mengintegrasikan alat berbasis AI ke dalam praktik mengajar. Siswa menunjukkan peningkatan rasa ingin tahu dan pemikiran kritis tentang peran AI dalam masyarakat dan pendidikan. Sebagai kesimpulan, program ini berhasil mencapai tujuannya dengan membekali peserta dengan pengetahuan dasar dan keterampilan praktis yang terkait dengan AI sehingga mempersempit kesenjangan literasi digital di komunitas sasaran. Dampak dari inisiatif ini meluas melampaui peserta langsung karena mendorong efek berantai pemberdayaan teknologi dalam lembaga pendidikan. Hal ini juga berkontribusi pada agenda nasional untuk membina warga negara yang siap menghadapi masa depan yang mampu menavigasi dan membentuk lanskap digital yang terus berkembang dengan perspektif yang etis dan terinformasi.
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

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

Abstract

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.
Perancangan, Pembuatan, dan Pengujian Pembangkit Listrik Energi Biomassa Putra, Rachmat Cahaya; Gandidi, Indra Mamad; Burhanuddin, Harmen
Jurnal Ilmiah Teknik Mesin FEMA Vol. 1 No. 2 (2013)
Publisher : FT UNILA

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

Abstract

This paper describe about designing and testing laboratory-scalebiomass energy power plant, toprovideelectricityin remote areasand islandswhich utilizerenewable energyin accordancewith thepresident decreeNo.5/2006. The power plantis built with gasificationreactorwhich designedbased onImbertdowndraftgasifier, integrated gas cleaned up system (IGCS) include cyclones, venturiscrubbersrectangulartype, and a new gas cleaner which called rotaryseparator. Experiments carried out withthe parametersof gasificationsystemsAFR0.48,0.5, 0.54,scrubbingwater flow 1.26, 2.62, 3.33l/min, rotaryseparator suction speed about 0.9,3.4,4.4 m/s. Each of parameters was interacted to producecleanproducer gas which free from tarandimpurities, as wellas ahigh calorificvalue as fuelgasgenerator. The result of experiment and literature review shows thatthecurrentgasificationAFR about 0.54still far enough from ideal rice husk gasification AFRabout 1.5. Eventhough, the remaining taris stillrelativelyhigh at3788.1mg/m3. AfterIGCSinstalled,the tarcan be significantly reducedto210.45mg/m3, with thescrubbingwater flow3.33l/min, and4.4 m/s suction speed of rotaryseparator. In addition, theelectric powergeneratedis stillbelow 100W,so installationshouldbe modifiedagain, especially in thesector ofair supply tothe reactor.Keywords : electricity crisis, biomass gasification, biomass energy power plant.
Co-Authors Ali Mustofa Amrul Amrul Andicha Aulia Putra Asep Bayu Dani Nandiyanto Candra Aditia Agustian Candra Aditia Agustian, Candra Aditia Dedi Triyadi Fiandini, Meli Harmen Burhanuddin Harmen Burhanuddin, Harmen M. Dyan Susila Mahmudatussa'adah, Ai Neni Susanti Neni Susanti, Neni Rachmat Cahaya Putra Rachmat Cahaya Putra, Rachmat Cahaya Ragadhita, Risti Reno Raines Sukrawan, Yusep