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Rahmat Iman Mainil
Universitas Riau
Aerospace Engineering 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 Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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KARAKTERISTIK PIPA KALOR DENGAN FLUIDA KERJA ASETON, FILLING RATIO 80 % PADA BERBAGAI KEMIRINGAN Rahmat Iman Mainil; Ferly Septian Iskandar; Azridjal Aziz
Jurnal Sains dan Teknologi Vol 18 No 2 (2019): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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This paper presents an experimental investigation of thermal characteristics of heat pipe (length of 400 mm and diameterof ¼ ̋) with working fluid aseton. The filling ratio was controlled at 80 %. The effect of heat input and inclination of heatpipe on the thermal characteristics of the heat pipe had been studied with variations of (3-6 W) and (0-90°), respectively.The result showed that the high heat input and inclination resulted to the increase of thermal performance of heat pipe
PENGUJIAN PENGERING TENAGA SURYA TIPE PEMANASAN LANGSUNG UNTUK PENGERINGAN PISANG PADA KONDISI BERBEDA Azridjal Aziz; Ahmad Surya; Rahmat Iman Mainil
Jurnal Sains dan Teknologi Vol 18 No 2 (2019): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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The direct solar dryer has been tested for drying bananas under different conditions. The dryer being tested is a hybriddryer that can be used with other energy sources, in addition to using solar energy as the main energy source during theday, while LPG gas is used for drying at night. The results showed that the highest temperature, the highest decrease inwater content in the test with LPG was obtained on shelf 6, while the lowest was obtained on shelf 1, because the heatsource was at the bottom of the dryer on shelf 6, the opposite happened to dry using solar energy because the heat sourcecame from the top of the shelf 1. In testing with LPG, the highest temperature that can be achieved is 84.7 ° C, on shelf6, while the lowest temperature is 52.3 ° C on shelf 1, on the other hand, the temperature of bananas using solar poweris the highest temperature on the shelf 1 at 11.00 WIB at 62.9 ° C and the lowest on shelf 1 at 17.00 WIB at 37.1 ° C. Thetotal energy requirement for drying in the test using LPG was 4681.92 kJ, while the total energy requirement for dryingin the test using solar power was 3176.24 kJ. Drying using solar energy is more economical than using LPG gas, but thedrying time is longer than LPG. Drying using a dryer technology have better quality and hygienic than open sun drying.
PERBANDINGAN PERFORMANSI AIR CONDITIONING HIBRIDA PADA STANDBY MODE (TRADITIONAL AC) DENGAN BEBAN PENDINGINAN 1000 WATT DAN TANPA BEBAN PENDINGINAN Azridjal Aziz; Eko Prasetyo; Rahmat Iman Mainil
Jurnal Sains dan Teknologi Vol 19 No 1 (2020): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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Pengujian mesin AC (Air Conditioning) hibrida (pemanfaatan sisi pendinginan dan sisi pemanasan sekaligus) pada pengoperasian standby mode (tradisional AC) dengan kondisi tanpa beban pendinginan dan dengan beban pendinginan 1000 Watt telah dilakukan pada penelitian ini. Kinerja AC hibrida pada kondisi tanpa beban dibanding kondisi dengan beban 1000W adalah rata-rata COP (Coefficient of Performance) sekitar 2,460 berbanding 2,452, PF (Performance Factor) sekitar 3,42 berbanding 3.41 dan TP (Total Performance) sekitar 5,88 berbanding 5,86. Hasil pengujian menunjukkan bahwa dengan beban pendinginan 1000 Watt mampu memberikan temperatur ruang pendingin rata-rata sebesar 28,3 °C, temperatur ruang pemanas 44,9 °C, kerja kompresor 0,5825 kW sedangkan pada kondisi tanpa beban pendinginan, temperatur ruang pendingin rata-rata sebesar 22,5 °C, temperatur ruang pemanas 38,8 °C, kerja kompresor 0,5449 kW. Hasil pengujian mesin AC hibrida dengan refrigeran HCR-22 menunjukkan bahwa kondisi tanpa beban pendinginan memiliki performansi tidak jauh berbeda dibanding dengan beban pendinginan 1000W. Hal ini menunjukkan temperatur ruang pendingin dengan beban pendinginan 1000 Watt menjadikan temperatur ruang pendingin dalam kondisi jauh dari rasa nyaman bagi penggunanya, sehingga beban pendinginnya harus dikurangi atau kapasitas pendinginannya dinaikkan
PENGARUH LAJU ALIRAN AIR PENDINGIN TERHADAP KINERJA PEMBANGKIT LISTRIK BERBASIS THERMOELECTRIC GENERATOR (TEG) Rahmat Iman Mainil; Gontor Andrapica; Azridjal Aziz
Jurnal Sains dan Teknologi Vol 19 No 1 (2020): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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Besarnya energi yang terbuang pada kendaraan menyebabkan para peneliti berupaya untuk memanfaatkan energi berupa panas buang kendaraan sebagai sumber energi listrik. Termoelektrik generator merupakan sebuah perangkat yang bekerja memanfaatkan efek seebeck sehingga dapat mengubah panas menjadi energi listrik. Dalam penelitian kali ini panas dirubah menjadi listrik menggunakan termoelektrik jenis TEG SP 1848 dan TEC 12706. Variasi laju aliran air pendinging 1,7 L/min dan 3,5 L/min digunakan untuk mengetahui efek laju aliran air pendingin terhadap kinerja Thermoelectric Generator. Jumlah modul termoelektrik juga divariasikan dari 1-4 buah. Temperatur panas input diperoleh dari sebuah heater listrik yang diberi tegangan 80 volt menggunakan sebuah slide regulator. Hasilnya didapatkan bahwa laju aliran air 3.5 L/min dapat menghasilkan daya listrik hingga 1.03 W pada penggunaan 4 buah modul TEG SP 1848.
KONDISI KERJA MESIN REFRIGERASI KOMPRESI UAP PADA VARIASI MASSA REFRIGERAN HIDROKARBON Rahmat Iman Mainil; Nurul Deswita; Afdhal Kurniawan Mainil; Azridjal Aziz
Jurnal Sains dan Teknologi Vol 19 No 2 (2020): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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Salah satu penentu kinerja mesin kompresi uap adalah massa refrigeran. Kinerja mesin refrigerasi dapat dinilai pada kondisi kerja sistem meliputi temperatur kotak pendingin, temperatur kerja kondensor dan evaporator, tekanan kerja kondensor dan evaporator, dan daya kompresor pada variasi massa refrigeran yang ditetapkan. Untuk menganalisa kondisi kerja tersebut, mesin refrigerasi kompresi uap diisi menggunakan refrigeran HCR-134a dengan variasi massa 60-220 gram. Hasil pengujian menunjukkan bahwa untuk seluruh variasi massa refrigeran, temperatur kotak pendingin dapat turun terhadap waktu operasi dimana rata-rata penurunan temperatur adalah 7 ºC. Tekanan evaporator dan tekanan kondensor meningkat dengan meningkatnya jumlah massa refrigeran yang diisi kedalam sistem, mengakibatkan semakin meningkatnya kerja kompresor. Kenaikan daya kompresor pada setiap massa refrigeran rata-rata sebesar 0,016 kW.
KOMPARASI KINERJA REFRIGERATOR DENGAN REFRIGERAN HIDROKARBON HCR134a ALTENATIF PENGGANTI R134a PADA PANJANG PIPA KAPILER 1,25 m Azridjal Aziz; Izzuddin 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

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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).
LAJU PENDINGINAN AIR DENGAN ICE ON COIL PADA MESIN PENDINGIN TYPE CHILLER UNTUK COLD STORAGE Irwandi Hidayat; Azridjal Aziz; Herisiswanto; Rahmat Iman Mainil
Jurnal Sains dan Teknologi Vol 14 No 1 (2015): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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The Ice on coil is ice storage technology where a tube coil is immersed in water. Ice formed out of a tube with a circulation of coolant in the secondary cooling tube generally the ice. The cooling machines at this time has evolved along with advances in technology. Generally, this machines utilizet for preservation of foods, vegetables and fruits. Interest cool water as secondary refrigerant temperature is 0 ° C to measure the ability of a coolant in the engine cool down the room and cold storage box. Performance cooler for cold storage box and the rooms have different values. COP value that all the rooms are larger than the storage box cold due to the labor supplied to the room is bigger than the box of cold storage, the temperature changes in the evaporator also greatly affect the value of COP, the greater the change in enthalpy evaporator, the greater the value of the COP given the machine
PENGARUH PENAMBAHAN KONDENSOR DUMMY (TIPE HELICAL COIL, TROMBONE COIL DAN MULTI HELICAL COIL) TERHADAP TEMPERATUR RUANGAN DAN TEMPERATUR AIR PANAS Adi Hans Purba; Azridjal Aziz; Rahmat Iman Mainil; Afdhal Kurniawan Mainil
Jurnal Sains dan Teknologi Vol 14 No 1 (2015): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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This paper provides a review of i.e: temperature achievement of three different dummy condenser. The study review was conducted to know the effect of adding dummy condenser coil type helical, coil trombone and multi helical coil without circulating water to room temperature and the temperature of the hot water. The method used in this review was a comparative method among tree types of dummy condenser i.e: helical coil, trombone coil and multi helical coil. The result comparison showed that the addition of dummy condenser type multi helical coil was better than dummy trombone coil and helical coil types. In the addition of dummy condenser without circulating water with multi helical coil, heated water temperature reached 64.73 oC in 3000 Watt of load. Whilst, the helical coil on the lowest room temperature reached 16.11 oC at the use of no load (19.26 oC on multi helical coil without load).
KARAKTERISTIK PIPA KALOR DENGAN FLUIDA KERJA ASETON, FILLING RATIO 60% PADA POSISI HORIZONTAL, KEMIRINGAN 45º DAN VERTIKAL Ferly Septian Iskandar; Rahmat Iman Mainil; Azridjal Aziz
Jurnal Sains dan Teknologi Vol 14 No 1 (2015): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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Abstract

Heat pipe is a simple equipment which has a very high thermal conductivity. In a large capacity of heat pipes can transfer the heat efficiently in a wide variety of temperatures without additional energy. The experiment is used copper pipe with a length of 400 mm and diameter 9.525 mm using acetone as working fluid. Screen mesh wick was used by screen 150 mesh. The experimental method is carried out to obtain the characteristics of heat pipe in form of axial temperature distribution, thermal resistance and heat transfer coefficient with filling ratio 60% (of the evaporator volume) at different orientations. The lowest thermal resistance and the highest heat transfer coefficient was occurred in a vertical position at 4.30 °C/Watt and 195.50 W/m2°C respectively. From the three orientations of heat pipes, vertical position indicated the decrease due to temperature difference between evaporator and condensor and the smallest thermal resistance in all heat input.
PENGARUH FLUIDA KERJA CAMPURAN AIR – ASETON TERHADAP KINERJA PERPINDAHAN PANAS PADA PIPA KALOR Utari Prayetno; Rahmat Iman Mainil; Azridjal Aziz
Jurnal Sains dan Teknologi Vol 14 No 2 (2015): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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Heat pipe is a heat transfer technology using a particular size pipe containing a special fluid as a heat conductor from the hot end to the other end as a working fluid. In this paper, heat transfer performance of 400 mm length and 9.5 mm diameter heat pipe using mixture of water – aceton as working fluid was eksperimentally investigated. The working fluid will be water – aceton mixture in 50% : 50% by volume and filled by 10% of 400 mm length heat pipe. The experiment of heat pipe has done at variation of inclination angle of 0o, 45o, and 90o. Applied of heat input was also variac from 3 W, 4 W, 5 W and 6 W to study the effect on heat transfer performance of heat pipe. The experiment result: increasing the heat input and inclination angle, will decreases the thermal resistance and increases the heat transfer coefficient of heat pipe. Heat pipe using the mixing fluid of water – aceton can reduces the average temperature of evaporator is 63.68 oC, with average thermal resistances is 6.71 oC/W, and the higher of average heat transfer coefficient is 126.01 W/m2 oC.
Co-Authors Abd. Rasyid Syamsuri Adha, Aidil Adi Hans Purba Adi Hans Purba Adriyandy, Warits Adriyus putra Adriyus putra Afdhal Kurniawan Mainil Afdhal Kurniawan Mainil Afdhal Kurniawan Mainil Ahmad Surya Ahmad Surya Ahmad Wisnu Sulaiman Anggriawan, Akbar Anita Susilawati Atria Martina Aulian Samri Auliaswan, Fayzil Aura Zulvani S Awaludin Martin Ayu Mita Jami Yanti Aziz, Azdrizal Azridjal Aziz Bungsu Herwanto Cahyati, Wulan Dani Ikhsan Putra Darfia, Novreta Deni Kurniawan Dicky Ikhwandi Eigko Malau Eko Prasetyo Eko Saputra Erlangga Dwi Atha Faisal Afif Faisal Tanjung Farida Isroani Fayzil Auliaswan Ferly Septian Iskandar Ferly Septian Iskandar Gihon Matondang Giri Saputra Gontor Andrapica Gontor Andrapica Gontor Andrapica Gordon HTTM Hasra Rafika Hasra Rafika Helmizar - Hendra Abdul Aziz Hendrik Syahputra Henni Syawal Herisiswanto Herisiswanto ' Herisiswanto, Herisiswanto Ibnu Rizqullah Iqbal Parija Irwandi Hidayat Irwandi Hidayat Izzuddin Ali Raja Siregar Izzuddin Ali Raja Siregar, Izzuddin Ali Raja Izzudin Ali Raja Siregar Jacklin Mendy Jenvrizen, David KHOIRUL ANAM Khotso Sai Listiono, Hendra luthfi afiif yazu M. Ibnu Sina Zikri Muh Wira Tri Kusuma, Muh Wira Tri Muhammad Faizal Syukrillah Muhammad Faizal Syukrillah, Muhammad Faizal Muhammad Ilham Muhammad Rif’at Syahnan N Fuad N. Nazaruddin Nabila Putri Maharani Nasution, Fikri Fahlevi Naufal Arif Budiman Nofriadi Nofriadi Novreta Ersyi Darfia Novreta Ersyi Darfia NST, Berriansyah Cipta Nugrah Suryanto Nurcholish Windiharto Nurman Saputra Nurul Deswita Nurul Deswita P. Eko Prasetyo Perima, Yoan Purba, Adi Hans Putra, Rio Ahmad Juliansyah Rahman Asfaranda Renaldi Khaesar Kumara Renhard Niptro G, Renhard Niptro Renhard Niptro Gultom Renhard Niptro Gultom Ridwan Abdurrahman Rizqullah, Ibnu Ruben Siregar Saberina Hasibuan Saberina Hasibuan Saipul Anwar Nasution Sarwo Fikri Sayfri Syafri Sihombing, Tikkos Sofia Zuhrah Suci Rahmadhani Irawan Suprayitno Suprayitno Surya, Ahmad Syafri Syafri ' Syahdi Fahala Banjarnahor Teguh Irawan Thalal, Thalal Tikkos Sihombing Tio Vani Nesri Utari Prayetno Utari Prayetno Wandi Wahyudi Wandi Wahyudi Warits Adriyandy Wulan Cahyati Yandra, Vicky Yoan Perima Yovan Witanto