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Pengkondisian Udara Secara Otomatis Pada Proses Pasteurisasi Kumbung Jamur Merang Menggunakan ATMEGA8535
Wardika, Wardika;
Karsid, Karsid
Jurnal Teknologi Terapan Vol 2, No 1 (2016): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v2i1.25
In this research designed an air conditioning system that is capable of reaching temperatures needed in the pasteurization process in miniature kumbung. The temperature required is approximately 70-80oC. The temperature was maintained for 4 hours. To maintain at that temperature control system designed 'on-off' by using a microcontroller ATMega 8535. This system works by shutting down the system when the temperature has been reached and revive the system when the temperature has dropped to the lower limit temperature setpoint. The results of this research in terms of the time required for the pasteurization process kumbung automatic mushroom faster at less than 5 hours compared kumbung regular mushrooms is 7-8 hours.
Peningkatan Kinerja Termoelektrik Ganda pada Mesin Pendingin Air Minum sebagai Solusi Penghematan Energi
Amrullah, Amrullah;
Djafar, Zuryati
Jurnal Teknologi Terapan Vol 1, No 1 (2015): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v1i1.34
Modul termoelektrik merupakan suatu alat yang bekerja untuk menghasilkan dingin dengan memanfaatkan energi listrik. Pemilihan modul ini didasarkan pada beban kalor, beda temperatur dan daya listrik yang digunakan. Termoelektrik pendingin memiliki beberapa kelebihan diantaranya tidak berisik, mudah perawatan, tidak memerlukan banyak komponen tambahan dan ramah lingkungan. Penerapan termoelektrik dengan dua tingkat atau lebih yang dikombinasikan pada mesin pendingin merupakan metode penting untuk meningkatkan kinerja termoelektrik. Pada penelitian ini akan dilakukan pengujian kinerja modul termoelektrik pendingin pada dispenser air minum dengan memanfaatkan tegangan listrik DC. Model termoelektrik yang akan diuji adalah modul ganda yang dirangkai secara seri listrik dan paralel listrik dengan meninjau temperatur air yang didinginkan, daya listrik yang digunakan termoelektrik dan kecepatan pendinginan. Hasil penelitian menunjukkan bahwa modul terbaik dari segi temperatur air, kecepatan pendinginan dan penghematan energi listrik adalah termoelektrik ganda yang dirangkai secara seri pada tegangan 10 V. Hal ini dapat dilihat setelah 360 menit dengan temperatur air yang didinginkan 12oC, beda temperatur 28oC, kalor yang diserap 19.52810 W ,dan COP 1.25268.
ANALISA KINERJA MESIN REFRIGERASI RUMAH TANGGA DENGAN VARIASI REFRIGERAN
Djafar, Zuryati;
Piarah, Wahyu Haryadi;
Amrullah, Amrullah
Jurnal Teknologi Terapan Vol 3, No 2 (2017): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v3i2.55
The most important component in the refrigerator is the refrigerant. The refrigerant absorbs heat from one side and throw it to another side through the mechanism of evaporation and condensation. This research aims to develop a refrigeration machine using different refrigerants that can be observed with the performance of the compressor, evaporator performance and COP, and hoped this research can show the installation as a medium of learning in applying the working principle of refrigerator. The research method was experimental at setting 8 refrigeration machine with data collection for the pressure and temperature of R-12 and R-134a were measured at the compressor inlet and outlet for 300 minutes. Determining the value of the enthalpy at any point by using REFPROP program. The use of different refrigerants in a refrigeration machine indicates that the refrigerant R-134a better than R-12. It can be seen after 300 minutes for R-134a, compressor performance 29.4 kJ / kg, the performance of the evaporator is 144.5 kJ / kg, COP 4.9 while for R-12 compressor performance 21.8 kJ / kg, the performance of the evaporator is 12.3 kJ / kg, COP 4.6.
STUDI KARAKTERISTIK REAKTOR GASIFIKASI TYPE DOWNDRAFT SERBUK KAYU DENGAN VARIASI EQUIVALENSI RATIO
Suliono, Suliono;
Sudarmanta, Bambang;
Dionisius, Felix;
Maolana, Imam
Jurnal Teknologi Terapan Vol 3, No 2 (2017): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v3i2.60
The depletion of fossil fuel reserves and natural gas makes people rethink to find alternative energy substitutes. Biomass is an alternative energy that is still abundant and has not been fully utilized. Gasification is one of alternative in gas making that change from solid fuel (wood powder) to thermochemical flammable gas. The research used downdraft gasification with experimental wood powder. The implementation of research was done in workshop of Indramayu State of Polytechnic, using batch system, it means once the import of biomass in the furnace from the beginning until the biomass out by 5 kg of wood powder biomass. Equivalence Ratio (ER) performed 4 variations namely: 1.01; 1.13; 1.34; 1.52. The recorded data are: temperature inside reactor, gasification operation time, air intake, syngas content, and flame visualization. The results obtained from the gasification process showed if the Equivalence Ratio (ER) is higher so the heating value of syngas decrease. LHV at ER 1.52 of 3980,306 Kj / m3 and the synthetis gas content decreased as much as 21,7806 %
Prototype of Monitoring and Control System of SCADA-based Water Tank Level
Irvawansyah, Irvawansyah;
Rahmansyah, Abdul Azis
Jurnal Teknologi Terapan Vol 4, No 1 (2018): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v4i1.88
The monitoring and water level controlling system is one sample of the simple industrial automation. Monitoring and controlling SCADA based water level can make it easier to do observation and controlling real time. This research have to design system water level control using ultrasonic sensors and equipped with display interface on laptop. This research is an R&D research that starts from the phase of problem identification, desing, and testing. Test results show good performance in accordance with the desired, where the water pump can be turned on when the water level at the reservoir reaches 10 cm and will be stopped automatically if the water level in tank reaches 70 cm. Monitoring and controlling water level can be done in real time on the laptop interface. So this system can be used as an alternative SCADA learning Media.
Perancangan Sistem Daur Ulang Pasir Pada Industri Pengecoran Logam Skala Kecil Untuk Peningkatan Efisiensi Biaya Dan Pengurangan Limbah
Undayat, Darma Firmansyah
Jurnal Teknologi Terapan Vol 4, No 1 (2018): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v4i1.77
Metal casting is a part of the manufacturing process to produce products that generally have intricate shapes or materials that can not be processed by ordinary machining. The complexity of the product can be achieved with the use of sand molds and the use of cores that are also made of sand. The process of recycling sand can be done by mechanical, thermal and chemical recycling methods. The sand system that has been used to produce waste in the form of waste sand, dust and other contaminants. This waste can be used for several purposes, among others: reused as metal casting sand, road construction, brick material etc. So far, recycling has been done on large scale metal casting. For medium and small scale this is not done. Used sand is treated as waste that is discarded and not utilized. The manufacture of a sand recycling system for metal casting allows the reuse of waste sand for print sand with the technical properties of sand that meet the desired quality. It will also be able to reduce waste disposed by metal casting. The study began with a literature study to find out the characteristics of used sand. Next is to plan the recycling process of the former sand, which then continued with manual sand recycling experiment. Against the recycled sand is then tested to determine its properties. The results of recycling experiments and test results are then analyzed to serve as a basis for designing and manufacturing sand recycling machines for small scale metal casting. The type of sand to be recycled is the CO2 process sand with a base of quartz sand. Based on the research that has been done, the following conclusions are obtained: CO2 process recycling sand technology produced is in the form of recycling system and analysis / study on the quality of recycling; design prototype sand recycling machine CO2 process produced is a design engine jaw crusher and hammer mill machine design.
PENGARUH KECEPATAN PUTARAN BLOWER EVAPORATOR TERHADAP KINERJA AC MOBIL
Wardika, Wardika;
Sunanto, Sunanto;
Sugara, Ferry;
Mulya, Yusha Tri
Jurnal Teknologi Terapan Vol 4, No 2 (2018): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v4i2.138
The air distribution system in the room has the task of flowing cold or hot air into the room, a comfortable room condition is at a temperature of 24˚C. This study aims to determine the effect of the speed of the blower rotation on the performance of the car's AC. The cooling system in the vehicle, uses a blower to distribute cold air produced by the evaporator. Many choices of speed blowers to distribute cold air. In this study using variations in the speed value of blowers. Blower speed greatly affects the room / cabin temperature. Avoiding excessive energy consumption or inefficient energy consumption is indicated by a decrease in the COP from a cooling machine. After research obtained efficiency data for low blower rotation speed of 73.36%, medium rotation of 72.86%, and high rotation of 72.83%. But the fastest cooling of the cabin uses a high speed blower rotation. Keywords: Performance, Car AC, Speed Blower, Temperature
Pengembangan Pengujian Crashworthiness dengan Simulasi Numerik Menggunakan Model Impact Transferability
Dionisius, Felix;
Istiyanto, Jos;
Suliono, Suliono;
Nur Rohmat, Yusup
Jurnal Teknologi Terapan Vol 3, No 1 (2017): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v3i1.4
Collision test is needed in transportation area in order to anticipate injuries of passangers when the accident occurred. Therefore, this test must be done for achieving standar requirements which is known by crashworthiness. This paper discussed about development of crasworthiness test by using modelling impact transferability by numerical simulation. The goal is to know the error of maximum deformation when given axial dynamic loading between numerical simulation and real experiment. Furthermore, analitic was used to validate duration of stress wave propagation from result of numerical simulation. This simulation used explicit finite element method by using PAM-Crash. The component of this research was impactor and impact of transferability with 80 and 27 kg of mass. The square tube-thin walled structure with holes as crush initator 3 mm of diameter was used as specimen. The result shows maximum deformation and duration of stress propagation error which are 3.90 % and 14.89 %.