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All Journal Jurnal MEKANIKAL Jurnal Sains dan Teknologi Rekayasa Mesin Jurnal Mechanical Jurnal Nasional Pendidikan Teknik Informatika (JANAPATI) Dharma Raflesia : Jurnal Ilmiah Pengembangan dan Penerapan IPTEKS Jurnal Teknik Mesin Aceh International Journal of Science and Technology Jurnal Polimesin Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin

Afdhal Kurniawan Mainil

Universitas Bengkulu

Author-ID : 2010154

Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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KARAKTERISTIK KINERJA PIPA KALOR MENGGUNAKAN STRUKTUR WICK SCREEN 100 MESH DENGAN FLUIDA KERJA AIR Wandi Wahyudi; Rahmat Iman Mainil; Azridjal Aziz; Afdhal Kurniawan Mainil
Jurnal Sains dan Teknologi Vol 15, No 1 (2016): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Pipa kalor merupakan alat penukar kalor dengan dimensi yang kecil tetapi dapat memindahkan kalor yang besar. Banyak penelitian mengenai pipa kalor, guna memperoleh peningkatan kinerja termalnya dengan memodifikasi fluida, orientasi, kecepatan putar dan struktur wick. Dalam penelitian ini pipa kalor dibuat dari pipa tembaga berdiameter 9,525 mm, tebal 1 mm dan panjang 400 mm menggunakan screen 100 mesh sebagai struktur wick dengan air sebagai fluida kerja. Variasi pengujian menggunakan 3 variasi sudut kemiringan 0o, 45o, 90o dan 4 variasi heat input 3 watt, 4 watt, 5 watt dan 6 watt untuk melihat pengaruhnya pada kinerja pipa kalor. Hasil penelitian menunjukkan bahwa semakin besar sudut kemiringan terhadap heat input, maka semakin kecil nilai hambatan termalnya. Hambatan termal terendah terjadi pada sudut 90o dengan heat input 6 Watt sebesar 8,60˚C/Watt. Koefisien perpindahan panas terbesar dan temperature difference terkecil terjadi pada sudut kemiringan 90o dengan nilai 97,70W/˚C m² dan 31,8°C.

KOMPARASI KINERJA REFRIGERATOR DENGAN REFRIGERAN HIDROKARBON HCR134a ALTENATIF PENGGANTI R134a PADA PANJANG PIPA KAPILER 1,25 m Azridjal Aziz; Izzudin Ali Raja Siregar; Rahmat Iman Mainil; Afdhal Kurniawan Mainil
Jurnal Sains dan Teknologi Vol 19, No 2 (2020): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Pada penelitian ini telah dilakukan uji komparasi mesin pendingin siklus kompresi uap dengan fluida kerja HCR134a (refrigeran hidrokarbon pengganti R134a) dan fluida kerja R134a yang beroperasi pada panjang pipa kapiler 1,25m dengan pendinginan udara. Analisisis dilakukan terhadap pengaruh tekanan dan temperatur, arus listrik, kerja kompresi, dan koefisien perfomansi (COP) alat uji. Hasil penelitian menunjukkan, penggunaan HCR134a meningkatkan COP sebesar 29.92% dengan penggunaan arus listrik lebih rendah 10.8% dibandingkan dengan R134a. Dari uji komparasi dapat disimpulkan bahwa penggunaan refrigeran hidrokrabon (HCR134a) memberikan kinerja yang lebih baik dan lebih hemat energi dibanding refrigeran halokarbon (R134a).

EFEK BEBAN PENDINGIN TERHADAP TEMPERATUR MESIN REFRIGERASI SIKLUS KOMPRESI UAP HIBRIDA DENGAN KONDENSOR DUMMY TIPE TROMBONE COIL ( 1/4″, 7,9 m) SEBAGAI WATER HEATER Aulian Samri; Azridjal Aziz; Rahmat Iman Mainil; Afdhal Kurniawan Mainil
Jurnal Sains dan Teknologi Vol 15, No 2 (2016): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Mesin pengkondisian udara hibrida dapat memberikan solusi untuk mengatasi masalah penggunaan energi listrik yang berlebihan, dengan cara memanfaatkan panas buang kondensor yang digunakan untuk pemanas air. Penelitian ini dilakukan untuk mengetahui pengaruh penambahan beban pendinginan terhadap temperatur pada sistem pengkondisian udara hibrida dengan kondensor dummy tipe trombone coil diameter 1/4″ panjang 7,9 meter sebagai water heater. Penelitian ini menggunakan metode eksperimental. Penelitian ini menggunakan beban pendinginan pada ruang simulasi dengan variasi pembebanan 0 Watt, 1000 Watt, 2000 Watt, dan 3000 Watt. Berdasarkan hasil pengujian, nilai tertinggi terjadi pada pembebanan 3000 Watt. Dimana temperatur air yang dihasilkan sebesar 48,34 ˚C, temperatur rata-rata refrigeran hasil kompresi sebesar 62,68 ˚C dan temperatur ruangan rata-rata mencapai 25,94 ˚C saat pengoperasian selama 120 menit.

ANALISIS PENGARUH PERBANDINGAN DIAMETER MINOR DAN MAYOR ELIPS TERHADAP NILAI KOEFISIEN DRAG MENGGUNAKAN PROGRAM CFD Afdhal Kurniawan Mainil; Fauzan Andreas; Helmizar
Jurnal Teknik Mesin Vol 2 No 1 (2012): Jurnal Teknik Mesin Vol.2 No.1 Oktober 2012
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2012.v2.i1.56-64

The rapid development of science and technology to inspire people to create something useful for human life itself. One example is the use of a cylindrical body which can be found on the heat exchanger (heat exchanger) is on shell and tube, chimney, and support offshore platforms. In this case, to obtain an optimum value as well as building construction and minimal ideal would be a mistake, it is necessary to know the characteristics of flow through the body. One of the characteristics of the flow is fluid flow through the cylinder body. Fluid passing through a cylindrical body will result in drag force. Research on the external flow across a body has done much to reduce the drag force. One was to replace the cylinder body with an elliptical geometry. In the present study will be conducted using the CFD numerical model with a test that is circular and elliptical cylinders. In the test model ellipse major and minor diameter ratio is varied (50mm/100mm, 50mm/120mm, 50mm/150mm, 50mm/180mm). In each test model will be calculated the value of the coefficient of drag is happening. The results of the simulations is the use of an elliptical body geometry can reduce the value of the coefficient of drag (CD) of 0.2519 on the minor and major diameter ratio (a/b = 50mm/150mm) than the circular cylinder with a drag coefficient (CD) of 0.5485 and the ratio of diameter minor and major of the most effective to reduce the coefficient of drag on the ellipse is (a/b = 50mm/150mm) than the minor and major diameter ratio (a/b = 50mm/100mm), (a/b = 50mm/120mm), (a/b = 50mm/180mm).

PENINGKATAN PENDAPATAN MELALUI PENDAMPINGAN PENGEMBANGAN USAHA MIKRO EMPING MELINJO DIKELURAHAN KANDANG KOTA BENGKULU Dri Asmawanti S; Heni Nopianti; Afdhal Kurniawan Mainil
DHARMA RAFLESIA Vol 14, No 2 (2016): DESEMBER
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v14i2.4310

This community service activitiy aims to improve the capacity, knowledge and skills in various aspects of micro scale enterprise (MSE) or business of gnetum chips (production, management and law). In addition, the goal is improving the quantity and quality of produced gnetum chips. The training has been done to diversify the products processed chips gnetum IE cookies crackers and chips caramelized on the Group micro scale business of Rafflesia and Cempaka in Bengkulu City. In management aspects of the business, it has been implemented various activities that can enhance the knowledge and skills of the partners in managing their business, such as business management and computerized marketing training. Lastly, in terms of the law, it has been implemented mentoring of legal permission to partner in order to register their business to P-IRT. Keywords: mikro scale enterprise, genum (emping), business, income

IbM MESIN PENGOLAH SAMPAH RUMAH TANGGA UNTUK MENUNJANG PROGRAM PEMBANGUNAN DI BIDANG KEBERSIHAN DI KOTA BENGKULU Ahmad Fauzan Suryono; Afdhal Kurniawan Mainil; Gusta Gunawan
DHARMA RAFLESIA Vol 13, No 1 (2015): JUNI
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v13i1.4134

The aim of this community service is to improve the environment and public health in the city of Bengkulu, and the success of the human development index in the health sector. While the goal in particular is the amount of waste in the landfill can be significantly reduced over time so that the cleanliness of the environment and health can be realized, can boost the economic value of the plastic waste from households because it can be sold to a factory producing plastic pellets and machinery This can help people who are interested in waste processing technology to become entrepreneurs plastic pellets. This activity lasted for ten months in cooperation with two partners, namely the Parks Department and Sanitation of Bengkulu and CV Terang Bulan engaged in the sale of plastic waste. In implementing this program assisted with the research team of students to design and create a municipal waste processing machine a plastic which is more practical with affordable production costs for society. On completion of this machine in addition to the stages involves students will also involve CV. Terang Bulan as a partner in business who have started this garbage. The partners are expected to play an active role in providing fill-enter on the specifications desired by the user. After making machines is completed then it is disseminated to the public that waste management is important and profitable economically. Keywords: Waste Processing Machines, Seeds plastic, household waste

Design of Portable Beverage Cooler Using One Stage Thermoelectric Cooler (TEC) Module Azridjal Aziz; Rahmat Iman Mainil; Afdhal Kurniawan Mainil; Sayfri Syafri; Muhammad Faizal Syukrillah
Aceh International Journal of Science and Technology Vol 6, No 1 (2017): April 2017
Publisher : Graduate Program of Syiah Kuala University

The Portable Beverage Cooler (PBC) has been designed to satisfy the need of cooler apparatus that could be carried easily. The utilization of this apparatus was intended to minimize the environmental damage affected by vapour compression refrigeration system using CFCs Refrigerant. The peltier effect from thermoelectric module was utilized in this PBC and called as Thermoelectric Cooler (TEC). Furthermore, heat-sink and fan were needed to ensure the cooling effect continously worked. To achieved the objectives of this machine (portable, environment-friendly, low watt, affordable), the design consideration are heat load, insulating material, weight of components, electric consumption, and dimension of the cooling box. The results of the design shows the PBC cooling box dimension is 6 cm x 6.5 x 15 cm. The insulation of the PBC cooling box are polyurethane foam and polystyrene expanded with thickness 6 mm and 5.3 mm, respectively. The alumunium plate was applied as inner wall to enhance the cooling capacity of cooling room temperature. In this PBC was used one stage of TEC that could yield cooling room temperature until 15 oC in 30 minutes operation by consuming 20 W of electricity.

Portable Thermoelectric Cooler Box Performance with Variation of Input Power and Cooling Load Afdhal Kurniawan Mainil; Azridjal Aziz; M Akmal
Aceh International Journal of Science and Technology Vol 7, No 2 (2018): August 2018
Publisher : Graduate Program of Syiah Kuala University

The thermoelectric module is a device that works by using the Peltier effect when electrical power supplied on it. In this study, the thermoelectric module is applied as thermoelectric cooler (TEC) using air cooling heat sink where cooling box capacity is 22 L. This paper experimentally investigates the thermal performance of thermoelectric cooler with a variation on input power and cooling load. The investigation has been conducted by three variations on input power (50.5W, 72.72W and 113.64W) and by two variations of the cooling load using mineral water (1440 mL and 2880 mL) with input power 113.64W. The box temperature achieved at input power 50.5W, 72.72W and 113.64W are 19.98oC, 19.77oC and 18.52oC, respectively. While at the cooling load of 1440 mL and 2880 mL, the temperature achieved in the box are 22.45oC and 23.32oC, respectively. The test results showed that in variation on the input power from low to high, the temperature in box becomes lower on high input power and causes the lower of COP, this is because more energy could be absorbed on high input power. In the cooling load variation, the greater the cooling load given in cooling box, then the longer the box temperature stability can be achieved because of more energy needed for decreasing the temperature of cooling box.

Perancangan Kotak Pendingin dan Pemanas Mengggunakan Modul Thermoelectric Cooling Sebagai Sumber Kalor Azridjal Aziz; Dani Ikhsan Putra; Afdhal Kurniawan Mainil; Rahmat Iman Mainil
JURNAL MECHANICAL Vol 13, No 1 (2022): Maret 2022
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v13.n1.202201

Modul thermoelectric cooling (TEC) adalah salah satu jenis pompa kalor berbentuk padatan (solid-state) yang membutuhkan penukar kalor untuk membuang kalor sebagai efek Peltier. Termoelektrik dapat memanaskan dan mendinginkan hanya dengan membalikkan polaritas, yang mengubah arah perpindahan kalor. Sisi yang dingin dapat digunakan sebagai pendingin dan sisi yang panas dapat digunakan sebagai pemanas. Penelitian ini bertujuan merancang kotak pendingin dan pemanas yang memanfaatkan modul termoelektrik sebagai sumber kalornya dengan menentukan daya yang dibutuhkan dan pemilihan rancangan terbaik. Tahapan pemilihan rancangan kotak pendingin dan pemanas (cool and hot box) adalah melakukan analisa beban kalor, perbandingan massa, perbandingan daya listrik, dan jumlah modul TEC yang digunakan, untuk menentukan desain optimum kotak pendingin dan pemanas. Hasil rancangan diperoleh ruang kotak pendingin dan pemanas dengan dimensi: 0,26 m x 0,20 m x 0.15 m dengan ketebalan polyurethane foam 25,7 mm sebagai isolator kotak pendingin, dan ketebalan 15,3 mm untuk isolator box pemanas. Daya yang dibutuhkan untuk mendinginkan minuman selama 30 menit dengan target temperatur ruang pendingin 15 ℃ adalah sebesar 86,07 W

Design of photovoltaic/thermal (PV/T) with heat pipes as a heat transfer medium used for water heater Rahmat Iman Mainil; Afdhal Kurniawan Mainil; Azridjal Aziz; Faisal Afif
Jurnal POLIMESIN Vol 21, No 2 (2023): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i2.3298

One of the main obstacles for developers and users of photovoltaic (PV) modules is that the module temperature is too high due to high solar radiation and a higher ambient temperature, which reduces PV efficiency. A photovoltaic/thermal (PV/T) system is a technique developed for absorbing heat, that combines PV with a solar thermal collector (STC). In this research, heat pipes are used as the heat transfer medium. This paper aims to design a PV/T system for water heating and examines the thermal performance and water temperature that can be achieved by PV/T. In designing PV/T, the method used is to estimate the intensity of solar radiation and determine the size of the thermal collector, thermal insulation, type of working fluid, and heat pipe filling ratio. The PV/T thermal performance is also tested after the system design has been built. The design parameters that have been obtained are the PV area of 0.67 m2 and the volume of heated water of 20 liters. This design proposes water as the working fluid of the heat pipe with a filling ratio of 10%. The system performance indicates that PV/T could heat the water to 50.9 °C with energy absorbed by the water of 1.85 MJ, and the maximum thermal efficiency of PV/T is 27.14%. The results show that PV/T has a very promising future in terms of its ability to use heat energy and can be further developed for future research so that it can encourage people to use environmentally friendly renewable energy

Co-Authors Adi Hans Purba Ahmad Fauzan Suryono Aulian Samri Azridjal Aziz Dani Ikhsan Putra Dri Asmawanti-s Faisal Afif Fauzan Andreas Fauzan Andreas Gusta Gunawan Helmizar Helmizar - Hendri van Hoten Heni Nopianti Huda, Widya Nurul Ida Ayu Putu Sri Widnyani Izzudin Ali Raja Siregar Julia Purnama Sari Khotso Sai M Akmal Muhammad Faizal Syukrillah Nanda Nurbaiti Nurbaiti Nurbaiti Nurbaiti Nurcholish Windiharto Nurul Deswita Nurul Iman Supardi Oktoeberza, Widhia KZ Permadi, Agung Imam Rahman, Muhammad Farchan Al Rahmat Iman Mainil Renhard Niptro Gultom Sarwo Fikri Sayfri Syafri Silitonga, Jhonson Van Syafri ' Vasiguhamiaz, Azvadennys Wandi Wahyudi Winata, Alben Sindhu Yovan Witanto

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