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All Journal Jurnal Teknik ITS Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal technoscientia JURNAL PENGABDIAN KEPADA MASYARAKAT EMITTER International Journal of Engineering Technology JURNAL SIMETRIK JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY INVOTEK: Jurnal Inovasi Vokasional dan Teknologi JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN JRST (Jurnal Riset Sains dan Teknologi) Jurnal Technopreneur (JTech) Prosiding Seminar Nasional Sains dan Teknologi Terapan Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Jurnal Elemen Jurnal Teknik Mesin Jurnal Engine: Energi, Manufaktur, dan Material JURNAL TEKNOLOGI TECHNOSCIENTIA Prosiding SNAST Eksergi: Jurnal Teknik Energi Journal of Mechanical Engineering, Science, and Innovation International Conference on Maritime Technology and Its Application
Arrad Ghani Safitra
Politeknik Elektronika Negeri Surabaya
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry 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 Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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STUDI EKSPERIMEN PERPINDAHAN PANAS KONVEKSI PAKSA EKSTERNAL PADA PLAT DATAR Rijalulakbar Dewantoro; Arrad Ghani Safitra; Lohdy Diana
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

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Abstract

Heat transfer is divided into three, conduction, convection and radiation. Convection is the heat transfer due to bulk movement within fluids. Force convection that happen on the surface of the object is the case of heat transfer for external flow. Force convection declared by the value of convection coefficient (h).Convection coefficient its affected by geometry of the object, fluid velocity, and the value of heat flux. The research has been done by experiment using flat plate aluminum with length 0,275m, width 0,065m and height 0,008m. The goal of this experiment is to know the characteristic of external force convection on flat plate. The object is heated by electric heater under the object, then its cooled by the air from centrifugal blower. Variation of fluid velocity and heat flux was performed to the object. Data retrieval using thermistor (temperature sensor) that integrated with arduino, multimeter (voltage and current sensor), and anemometer (fluid velocity sensor). During experiment, the data taken are surface temperature and fluid velocity. From the experimental result obtained the best value of convection coefficient located on 0,005m, that is the variation fluid velocity 4,8 m/s the value is 275,4 W/m2K. This shows that the higher the fluid velocity will increase the value of the convection coefficient.
STUDI EKSPERIMEN PERPINDAHAN PANAS KONVEKSI PAKSA INTERNAL PADA SALURAN BENTUK SILINDER DAN PERSEGI Qurniawan Zen Al Faris; Arrad Ghani Safitra; Setyo Nugroho
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

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Abstract

Forced convection inside a pipe is a case of convection mass transfer for internal flow. Main parameter of internal flow forced convection is a convection coefficient number (h). One of the ways to increasing the convection coefficient number is changing the cross section of the channel. But, there are some other factors that affect the convection coefficient number such as fluid velocity, surroundings temperature, and the number of heat flux. The study was conducted experimentally by making a channel from aluminum with cylinder and square cross section form. With 1.5 m length hydraulic diameter 0.0762 m, which aims to find out the characteristics of internal flow forced convection heat transfer. The channel surface is fully isolated to minimize the value of heat losses caused by the ambient temperature, so that the same thermal energy is obtained along the channel. Heating on the surface of the channel uses an electric heater with a capacity of 223.52 watts. Then the air fluid is channeled through the channel at a speed of 3.6 m / s and 5 m / s using an electric blower regulated by a valve. Testing is carried out in a room where the temperature is conditioned, taking temperature data using a temperature sensor (thermistor) within 25 cm of each sensor mounted on the surface of the channel wall. Data processing uses software engineering equation solver (EES) to improve the analysis of experimental results. From the analysis results obtained, the square channel convection coefficient number is greater than the cylinder form channel of 22,84; 22,77; 22,72; 22,7; 22,69; 22,72 W / m2K.
KOMBINASI ISOLASI PADA STORAGE TANK SEBAGAI PENYIMPAN PANAS APLIKASI PADA SOLAR WATER HEATER Kurnia Devi Ariswanda; Arrad Ghani Safitra
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

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Abstract

Solar water heater is a new renewable energy that produces heat energy for everyday use. In solar water heater required a heat storage device called a storage tank. One of the innovations to reduce heat loss in storage tanks by providing a combination of isolation. The purpose of this study is to retain heat from water in storage tanks at specific time intervals and increase tank effectiveness in the presence of a combination of isolation. In this study, the storage tank consists of two layers of barrier material and two layers of insulation using materials from sand, soil, bricks, and pool-rocks with variations of pool rocks-sand, sand-pool rocks, pool rocks-bricks, bricks-pool rocks, pool rocks-soil, and soil-pool rocks.. The experimental data is collected when the water temperature conditions reach 45 ° C to 35 ° C. Data taken in this research is temperature change of each layer of storage tank, water entry temperature, and time needed to get heat loss in every hour. The analysis used transient heat transfer and thermal resistance method to determine the heat loss and effectiveness of storage tanks in each variation. From this research, the highest effectivity on soil-pool rocks 68% with total heat loss 2968,98 Watt from distributed energy 9322,12 Watt. As for the lowest effectiveness on the bricks-pool rocks variation of 45% with a total heat loss of 6013,84 Watt of distributed energy 10996,83 Watt.
Co-Authors Elby , Alvin Christian Abdul Aziz Abdul Kadir Djaelani Achmad Bahrul Ulum Achmad Setiyawan Agam Sulistyo Aghist Fitrony, Muhammad Agung Dwi Cahyo Ahmad Taufiqurrahman Azhar Aji, Pandu Gautama Amalia, Rif?ah Amalia, Rif?ah Amelia, Firyal Nisa Apriani Rosnauli S Aribowo, Teguh Hady Arifin P. P., Moch. Denis Arini, Nu Rhahida Ary Bachtiar Khrisna Putra Ary Bachtiar Khrisna Putra Denny Muhammad Agil Dewi, Naili Husna Diana, Lohdy Eky Novianarenti Eky Novianarenti Eny Kusumawati Erik Tridianto Erik Tridianto Erlinda Ningsih, Erlinda Fauziyyah, Inas Nabilah Fifi Hesty Sholihah G. P., Hendrik Elvian Haidar Fakr, Muhammad Hendrik Elvian G. P. Heroe Poernomo Heroe Poernomo Hidayatullah, Muhammad Muslih Ikhsan Baihaqi Imaniah Sriwijayasih Inas Nabilah F Islam, Saiful Ismah, Paradya Nabilah Joke Pratilastiarso Julfan Hafiz Fareza Julianto, Mochammad Arief Kurnia Devi Ariswanda Lohdy Diana Lohdy Diana Lovyta Putri Adianti Moch. Denis Arifin P. P. Mochammad Arief Julianto Mochammad Denis Arifin Pratama Putra Mohammad Basuki Rahmat Muhammad Nabiel Ariansyah Nabila Haninda Az Zahra Nabila Haninda Azzahra Naili Husna Dewi Nu Rhahida Arini Nur Hidayat Prasetyo, Muhammad Fandi Setiawan Cahyono Pratilastiarso, Joke Prima Dewi Permatasari Priyambodo Nur Ardi Nugroho Puspitasari, Susi Puspitasari, Susi Putra, Firdaus Fhudoli Qurniawan Zen Al Faris Radina Anggun Nurisma Rif’atus Sholihah Rijalulakbar Dewantoro Rini Indarti Rio Adi Kristian Riyantoni, Ricko Guntur Rizal Mahmud Saputra, Firman Yunan Setyo Nugroho Setyo Nugroho Setyo Nugroho Syahputra, Ar Rayyan Ikhsan Syariful Hadi, Muhammad Teguh Hady Aribowo Teguh Hady Ariwibowo