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All Journal Jurnal Teknik Mesin International Journal of Renewable Energy Development Jurnal Teknik ITS IPTEK The Journal of Engineering IPTEK Journal of Proceedings Series Journal of Engineering and Technological Sciences Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin JMES The International Journal of Mechanical Engineering and Sciences Jurnal Ilmiah Teknik Mesin Poros Sewagati

Djatmiko Ichsani

Departemen Teknik Mesin Institut Teknologi Sepuluh Nopember

Author-ID : 284969

Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Eksperimental Study the Effect of Additional Flat Plate Reflector to Performance the Sinusoidal Solar Water Heater Dedy Ashari; Djatmiko Ichsani
IPTEK The Journal of Engineering Vol 5, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v5i1.a5015

New Renewable Energy is currently not fully utilized. Energy sourced from the sun is one of the most exploited energy sources today in several countries in the world, which in large scale has been used as a power plant. The solar collector is a heat exchange device that serves to convert solar radiation energy into a form of heat energy to heat a working fluid, such as water and air. Various methods have been undertaken to improve the performance of solar collectors, including using flat plate reflectors. Reflectors are used to reflect the diffused sunlight to focus on solar cells and ultimately increase the value of solar cell output power. Experimental studies in this study were conducted to see the performance of a solar collector sinusoidal with and without the addition of reflectors under varying discharge conditions. Variations of mass flow rate in this study were 18 and 20 liters/hour. The reflector angle on the solar collector is set at 40° on both sides of the reflector. From this study, the results for the efficiency of a solar collector with the addition of a reflector are the highest at 43,91% at a mass flow rate of 20 liters / hour.

Determination Analysis of Dish Collector Focal Shape in Vertical and Horizontal Direction of Concentrating Solar Power System Dany Iman Santoso; Djatmiko Ichsani
IPTEK Journal of Proceedings Series No 1 (2015): 1st International Seminar on Science and Technology (ISST) 2015
Publisher : Institut Teknologi Sepuluh Nopember

A CSP (Concentrating Solar Power) system must have a receiver to receive solar ray reflection from parabolic dish collector. Based on the receiver installation to the collector, there are two type installation such as parallel to collector (horizontal direction) and perpendicular to collector (vertical direction). In this research not only we compared the receiver orientation but also we varied geometry concentration ratio. The experiment results show that the focal shape diameter elongates 2 mm and surface temperature increases 5-10°C for vertical orientation with greater concentration ratio. However, there is no significant effect to receiver with horizontal orientation. Thermal efficiency was affected by radiation and convection heat loss but for geometry concentration ratio above 100, radiation and convection heat loss gived small impact.

Study of Simulation and Experimental Effect of Vaccum Degrees Between Glass Containers and Absorber on Solar Water Heater with Absorber Sinusoidal Type Royyan Firdaus; Djatmiko Ichsani; Mohamad Hakam; A’rasy Fahruddin
IPTEK Journal of Proceedings Series No 1 (2019): 4th International Seminar on Science and Technology 2018 (ISST 2018)
Publisher : Institut Teknologi Sepuluh Nopember

In this era, the energy crisis is the spotlight, as many of us rely heavily on non-renewable energy such as fuel oil and natural gas, so that if the fuel source runs out, then all life processes will also stop. Not only that, the pollution caused by the use of fuel oil is very bad for the environment. Therefore, there is need for savings in all aspects of life that require energy. One of them is solar energy. In this research we are researching how to analyze and make solar water heater experiments effective and efficient so that can be widely used by many people. Solar water heater is very varied in terms of methods used to take the sun's heat. It all depends on the design and analysis made. In this case the wide absorption of solar thermal energy absorbed by the absorber is also very important, for that we use sinusoidal-shaped absorber plate. Furthermore, through the journals that ever existed, the researchers took 2 important aspects that need to be in the study that is with the variation of vacuum and discharge rates with the thickness of the sinusoidal (δ) 2 mm absorber plate. For the vacuum level will be varied 0 mm.Hg, -20 mm.Hg, -40 mm.Hg, -60 mm.Hg, -80 mm.Hg, -100 mm.Hg, -120 mm.Hg and by varying the fluid flow of work by adjusting the valve opening, that is from 18 L/hour to 22 L/hour with increase of 2 L/hour. By varying the level of vacuum between the absorber plate and the cover glass, it is expected to minimize the loss coefficient, increase the temperature of the absorber, and the temperature of the cover glass down. So it can improve collector efficiency 63.29%. and usefull Heat 760.39 Watt/m2, when the solar collector is set at a discharge of 22 L/hour, vacuum level -120 mmHg

Influence of Nozzle-to-Surface Distance Ratio and Reynolds Number Variation on Hemispherical Tempered Glass Strength and Quench Time Frans Loekito; Budi Utomo Kukuh Widodo; Djatmiko Ichsani
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 1 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i1.2208

The quenching step in a glass tempering process is a transient heat transfer phenomenon which is governed by several parameters – Reynolds number (Re) and the nozzle diameter-to-surface distance ratio (H/D). In this research, the effect of such parameters on the strength and quench time of hemispherical tempered glass are to be analyzed. The quenching process will use the impinging jets quench method, with an equilateral – staggered nozzle arrangements. The process is performed in an ambient air of 60oC and with a nozzle pitch and diameter of 27 mm and 4 mm respectively. The study applies variations of Reynolds number: 2300, 10000, 20000, 30000, 40000, 50000, 60000, 70000, 80000, and 87000, and H/D: 2, 6, 9, and 12. These variations are used to construct and solve a mathematical model, to obtain temperature distribution contours. The contours are then transformed into stress distribution graphs. From these steps, it is found that the tempered glass strength increases and the quench time decrease along with the increase of Re and the decrease of H/D. It is also found that the allowable range of operation is between Re = 8000 – 25000 for H/D =2 and Re = 8000 – 30000 for H/D = 6, 9, and 12.

Thermal Analysis on Water-Simple Rankine Cycle and Combined Cycle for Waste Heat Recovery Flat Glass Factory Zefanya Hiro Wibowo; Budi Utomo Kukuh Widodo; Djatmiko Ichsani
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 1 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i1.2213

One of the most important processes in glass production is the furnace section. The furnace’s waste heat, which still has a temperature around 400oC-500°C, is often released directly to the surrounding using a stack. Waste Heat Recovery Generation (WHRPG) and Organic Rankine Cycle (ORC) is one of the many waste heat reusing schemes implemented to increase the efficiency of industrial processes by converting the waste heat into electricity. Two schemes of the system will be studied in this research; there are Water-Simple Rankine Cycle (WSRC) and combined cycle (WSRC and ORC). In the WSRC, steam mass flow rate varied and found the highest performance to compare with combined cycle system. For combined cycle, the variations of the system are steam mass flow rate, the evaporating temperature, flue gas temperature in stack and refrigerant as working fluid. For the result, the highest combined cycle perform is 5.89 MW with steam mass flow rate 5 kg/s. Higher evaporating temperature (160°C) results in a higher combined cycle performance (5.96 MW), while, similarly, a lower flue gas temperature (120°C) also yields a higher combined cycle performance (6.3 MW). By varying the working fluids of R-11, R-113, and R-114.

STUDI SIMULASI NUMERIK PENGARUH PENAMBAHAN FINS SETENGAH SILINDER DISUSUN SECARA STAGGERED TERHADAP KINERJA KOLEKTOR SURYA PEMANAS UDARA DENGAN PLAT PENYERAP V-CORRUGATED Sulaiman Ali; Djatmiko Ichsani
Jurnal Ilmiah Teknik Mesin POROS Vol 15, No 1 (2017): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Abstract: The use of solar energy by using solar collector has been extensively researched to optimize existing solar energy source, one of the methods to utilize solar energy is by using solar collector and has been widely utilized by humans in the drying process. To create a solar collector with optimum performance the thermal efficiency needs to be increased, as for increasing the thermal efficiency of solar collector one by extending the absorption field and increasing the convection heat transfer coefficient by creating a turbulent flow inside the solar collector duct, the flow turbulence can be achieved by Provides obstacle and fins disturbance to the flow direction of the working fluid under the hot absorber plate. This research was conducted with 3D Steady flow numerical simulation with turbulence viscos k-omega SST. The objective of this research is to know the optimum diameter and spacing of fins variation with 6mm, 8mm, and 10mm fins diameter, and variation of fins distance to obstacle 0,25L; 0.5L and 0.75L. The result of numerical simulation optimum fins is determined by the smallest ratio of ΔP/ΔT and this research continued to the experiment. The solar collector used in this study is a solar collector using a v-corrugated absorber plate with triangular obstacle and half cylindrical fins arranged staggered inside a solar collector duct. The results obtained from this research is, the most optimum half cylinder fins are 6 mm fins with a fins distance to obstacle 0.75L.

Pelatihan Keterampilan Las Listrik untuk Masyarakat Sekitar Kampus ITS Suhardjono; Triyogi Yuwono; Herman Sasongko; Djatmiko Ichsani; Bambang Pramujati; Bambang Sudarmanta; Yusuf Kaelani; Sampurno; Mohammad Khoirul Effendi
Sewagati Vol 5 No 1 (2021)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (531.732 KB)

Pengangguran di Indonesia secara umum masih cukup tinggi sekitar 7 juta orang sesuai data BPS pada Agustus 2018. Sebenarnya bukan hanya tugas pemerintah yang harus menurunkan jumlah pengangguran tersebut, tetapi juga peran Perguruan Tinggi dalam tugas Tridharmanya, yaitu Pengabdian kepada Masyarakat. Selain daripada itu pekerja konstruksi Indonesia yang jumlahnya 8,3 juta masih mempunyai kualitas rendah. Hanya sekitar 7,4% yang mempunyai sertifikat atau sekitar 616.000 orang dan hampir 2/3 yang bersertifikat tersebut masih dalam tingkatan “TERAMPIL” dan sisanya bersertifikat tingkat “AHLI”. Dari alasan itulah maka Laboratorium Proses Manufaktur dengan peralatan praktikum las listrik yang tersedia akan ikut berpartisipasi aktif dalam mengurangi angka pengangguran dan menciptakan keterampilan dalam bidang MEKANIKAL dengan subbidang Tukang Las. Pelatihan keterampilan las listrik ini bertujuan selain memberikan keterampilan bagi peserta baru yang ingin menjadi tukang las. Dampak yang diharapkan untuk Pelatihan keterampilan Las listrik ini adalah terciptanya tukang las baru yang siap bekerja baik di bengkel-bengkel las dan tukang las yang dapat mengisi lowongan kerja sebagai tukang las. Internet memasarkan menjadi Tukang Las lepas “Freelance” bermodal kecil yang dapat dipanggil ke Rumah. Untuk itu pada pelatihan ini diberikan suatu proyek sederhana untuk membuat produk seperti rak sepatu, gantungan handuk dan sejenisnya.

Studi Analitik Penambahan Reflektor Pelat Datar Sudut 60˚ pada Pemanas Air Tenaga Surya Ashari, Dedy; Ichsani, Djatmiko
Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 8, No 2 (2023): Enthalpy: Jurnal Ilmiah Mahasiswa Teknik Mesin
Publisher : Teknik Mesin Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/enthalpy.v8i2.36117

The condition of electrical energy in Indonesia is increasing every year, one of which is used as a water heater. Various methods have been used to increase the efficiency of solar water heaters, including the use of flat plate reflectors. This research was carried out analytically to determine daily solar radiation intensity data on solar collectors with the addition of a 60˚ angle reflector. The results obtained in conditions without reflectors, the daily average solar radiation value produced by solar collectors is 1136 W/m2. Then for the condition of the reflector angle of 60˚, the daily average solar radiation value is recorded at 1386 W/m2. There is a difference of 250 W/m2 between the two conditions. The daily solar radiation intensity value is also calculated using the area method, the result is a daily solar radiation value of 2.542 kWh/m2 in conditions without the reflectors. Furthermore, at a reflector angle of 60˚, the resulting solar radiation value increases by 6% to 2.712 kWh/m2. The addition of a flat plate reflector at an angle of 60˚ is proven to increase the daily solar radiation intensity value that can be received by a solar water heater.

Co-Authors Alifia Masitha Harina Anggareza Adhitiya Anindya Ayu Pakarti Ashari, Dedy A’rasy Fahruddin Bambang Antoko Bambang Antoko Bambang Pramujati Bambang Pramujati Bambang Sudarmanta Binar Kusumah Bagja Budi Utomo Kukuh Widodo Clarissa Suroso Dany Iman Santoso Dedy Ashari Devia Gahana Cindi Alfian Ekadewi Anggraini Handoyo Fajar Sri Lestari Pangukir Fajri Chairbowo Ferianto Ferianto Frans Loekito Harlista Dwi Herman Sasongko Herman Sasongko Izha Mahendra Luki Apriliasari Mohamad Hakam Mohammad Khoirul Effendi Mohammad Khoirul Effendi Muhammad Fajar Ramadhan Niko Aris Sudiyanto Nur Sapti Marsheliyana Prabowo . Prabowo Prabowo Prabowo Prabowo Ria Mahmudah Royyan Firdaus Sampurno Sampurno Sampurno Suhardjono Suhardjono Sulaiman Ali Sutardi Sutardi Triyogi Yuwono Viki Wahyu Endriyana Yusuf Kaelani Yusuf Kaelani Zefanya Hiro Wibowo

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