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All Journal Jurnal Energi Dan Manufaktur Jurnal Mechanical Turbo : Jurnal Program Studi Teknik Mesin Jurnal Elementer (Elektro dan Mesin Terapan) Infotekmesin Jurnal Pengabdian Kepada Masyarakat Ungu ( Abdi Ke Ungu) Open Science and Technology Jurnal Polimesin
Ahmad Yonanda
Department Of Mechanical Engineering, Faculty Of Engineering, University Of Lampung, Bandar Lampung, 35143, Lampung, Indonesia
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health

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Simulasi Unjuk Kerja Termal Dan Pressure Drop Kolektor Surya Pelat Datar Aliran Serpentine Menggunakan Metode-CFD Ahmad Yonanda; Amrizal Amrizal; Amrul Amrul
JURNAL MECHANICAL Vol 10, No 1 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v10.i1.201905

Abstract

Untuk mengetahui karakteristik unjuk kerja kolektor surya ini dapat digunakan metode CFD (Computational Fluid Dynamic). CFD memberikan kemudahan untuk menganalisis karakterisrik aliran fluida yang berkaitan dengan distribusi temperatur dan tekanan yang terjadi. Tujuan penelitian ini adalah menganalisis karakteristik unjuk kerja termal dan pressure drop pada kolektor surya pelat datar menggunakan metode CFD. Langkah-langkah yang dibutuhkan dalam proses simulasi CFD adalah: desain dan name selection geometri, meshing, pemilihan metode radiasi, pemilihan jenis material dan input kondisi batas. Proses iterasi simulasi ditunjukkan oleh grafik “residual” yang konvergen dengan hasil simulasi berupa kontur temperatur dan tekanan. Kemudian proses validasi dilakukan terhadap hasil simulasi dengan cara membandingkannya dengan data eksperimen. Langkah selanjutnya mensimulasikan unjuk kerja kolektor surya berdasarkan variasi laju aliran massa fluida dan variasi jarak antara pipa (W). Hasil penelitian ini menunjukkan bahwa peningkatan laju aliran massa fluida sebesar 0,005 kg/s (dalam range 0,005 - 0,02 kg/s) mengakibatkan temperatur keluar fluida kerja akan mengalami penurunan sekitar 2°C. Sementara itu penggunaan jarak antara pipa (W) 40 mm jika dibandingkan dengan jarak antara pipa (W) 80 mm akan meningkatkan temperatur keluar fluida kerja sebesar 3,9°C. 
Simulasi unjuk kerja kolektor surya hybrid PV/T berdasarkan jarak susunan pipa absorber berbentuk spiral Ahmad Yonanda; Amrizal Amrizal; Harmen Harmen; Hadi Prayitno
TURBO [Tulisan Riset Berbasis Online] Vol 11, No 1 (2022): Jurnal TURBO Volume 11 Nomor 1 Juni 2022
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v11i1.1906

Abstract

The performance of the solar collector can be reviewed based on several parameters, namely thermal and large fluid drop (pressure drop). This study aims to compare the thermal and pressure drop performance of plate-type solar collectors based on a spiral-shaped pipe arrangement using the distance between the pipes. The comparison of performance analyzed in each study for the distance between the pipes is 25 mm and 50 mm. The approach or stage of research on the performance of the data plate type solar collector is through CFD simulation testing. The simulation stages that will be carried out include: making the geometric design of the solar collector and selecting the mesh method used by the polyhedral type. The results of the solar collector test carried out by CFD simulation show that the use of a 50 mm absorber pipe arrangement has a higher thermal efficiency when compared to the 75 mm absorber pipe arrangement and also a 49.45% increase in pressure drop.
Karakteristik Kolektor Surya Pelat Datar Aliran Spiral Menggunakan Metode Simulasi CFD: Characteristics a Spiral Flat Plate Solar Collectors Using CFD Simulation Method Ahmad Yonanda; Amrizal
Open Science and Technology Vol. 1 No. 1 (2021): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.vol1no1.2021.20

Abstract

Kolektor surya pelat datar sering digunakan dalam memanfaatkan energi surya. Kolektor ini memiliki keuntungan yaitu dapat menyerap dengan baik radiasi matahari. Untuk mengkarakteristik unjuk kerja kolektor surya dapat digunakan metode Computational Fluid Dynamic (CFD). CFD memberikan kemudahan untuk menganalisis karakterisrik aliran fluida. Tujuan dari penelitian ini adalah melihat karakteristik unjuk kerja termal dan pressure drop kolektor surya pelat datar aliran spiral dan serpentine menggunakan CFD. Langkah-langkah yang dibutuhkan dalam proses simulasi CFD meliputi: desain dan name selection geometri. meshing. pemilihan metode radiasi. pemilihan jenis material dan input kondisi batas. Kemudian proses validitas dilakukan terhadap hasil simulasi dengan cara membandingkan dengan data eksperimen aliran serpentine. Langkah selanjutnya mensimulasikan kolektor surya pelat datar aliran spiral dengan metode CFD kemudian hasilnya dibandingkan dengan hasil data simulasi aliran serpentine. Hasil penelitian ini menunjukan bahwa untuk jenis aliran spiral setiap kenaikan laju aliran massa sebesar 0.005 kg/s maka temperatur maksimal fluida kerja akan mengalami penurunan sebesar 2°C. Kemudian pada laju aliran massa terbesar yaitu 0.02 kg/s. pressure drop maksimal fluida kerja (air) ialah 1339 Pa. Penggunaan jenis aliran spiral pada kolektor surya pelat datar akan meningkatkan nilai temperatur keluar fluida kerja (Tout) sebesar 3.14 % dan menurunkan temperatur permukaan kolektor sebesar 6.4 %   serta   pressure drop fluida sebesar 15.08 %. Flat plate solar collectors are often used in harnessing solar energy. This collector has the advantage of being able to absorb solar radiation well. To characterize the performance of the solar collector. the Computational Fluid Dynamic (CFD) method can be used in the present study. CFD provides benefits for analyzing fluid flow characteristics. The purpose of this research is to characterize the thermal performance and pressure drop of spiral and serpentine tube solar collectors using the CFD method. The steps required in the CFD simulation process include the design and selection of geometry names. meshing. radiation planning. selection of material types and input conditions of boundary conditions. Then the validity process is carried out and compared to those obtained from experimental data. The next step is to simulate for both the thermal performance and pressure drop of spiral and serpentine flow solar collectors flat using the CFD method. In comparison with the serpentine flow type. the use of the spiral flow type on the flat plate solar collector will increase the value of the outlet working fluid temperature (Tout) by 3.14%. Otherwise. the use of the spiral flow type will reduce collector surface temperature by about 6.4 % respectively and the pressure drop of working fluid by about 15.08%.
PEMANFAATAN PLTA SKALA PICO SEBAGAI SOLUSI PENERANGAN UNTUK BUDIDAYA IKAN AIR TAWAR DI PEKON NEGERI SAKTI KECAMATAN GEDONG TATAAN, KABUPATEN PESAWARAN Harmen Harmen; Ahmad Yonanda; Amrizal Amrizal
Jurnal Pengabdian Kepada Masyarakat Ungu( ABDI KE UNGU) Vol. 4 No. 3 (2022): Jurnal Pengabdian Kepada Masyarakat Ungu ( ABDI KE UNGU)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Aisyah Pringsewu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30604/abdi.v4i3.734

Abstract

Pekon Negeri Sakti, Gedong Tataan District has a location close to the flow of rivers with a small discharge and has been used by some residents to become fish farming ponds. So far, the problem is the lack of lighting for fish ponds and the large number of illegal fishing in the local area at night. Problems faced by Partners can be overcome by looking at the potential of natural resources at partner locations. Judging from the potential of natural resources in the location, there is a river flow that can be used as a pico-hydro power plant or pico scale PLTA. The general goal of this service is to implement appropriate technology in areas near river flows as a source of electricity. The manufacture of microhydro power plants starts from measuring the potential of water, designing turbines and generators, then observing the working system and estimating the electrical power that will be generated. From the survey results, it is known that the water discharge is 2 liters/second and has a fall height or head of 0.5 m. The manufacture of pico-hydro power plant using a screw turbine is capable of producing 5 watts of electrical power. The power generated can be useful for residents for continuous lighting around the pond and at the same time to overcome the potential for illegal fishing at night.
Unjuk Kerja Termal dan Elektrikal Kolektor Photovoltaic/Thermal (PV/T) Berdasarkan Ketebalan Sirip Absorber Amrizal Amrizal; Ahmad Yonanda
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.n1.202204

Abstract

Beberapa hal yang dapat mempengaruhi unjuk kerja kolektor Photovoltaic/Thermal (PV/T) diantaranya adalah intensitas radiasi matahari, sirip absorber dan laju aliran massa fluida. Unjuk kerja dapat ditinjau berdasarkan efisiensi termal dan efisiensi elektrikal dari kolektor PV/T. Tujuan penelitian ini adalah untuk mengetahui peningkatan kinerja kolektor PV/T berdasarkan perbedaan ketebalan sirip absorber. Ketebalan sirip yang diimplementasikan dalam penelitian ini masing-masing adalah 1 mm dan 2 mm dengan penggunaan pelat aluminium sebagai material sirip. Pengujian unjuk kerja kolektor dilakukan diluar ruangan di daerah Lampung dengan kondisi radiasi matahari minimal 750 W/m2 danmenggunakan udara sebagai fluida kerja. Berdasarkan perubahan temperatur permukaan kolektor, hasil pengujian menunjukkan bahwa terjadi peningkatan unjuk kerja rata-rata terhadap ketebalan sirip 2 mm jika dibandingkan dengan 1 mm masing-masing 8.9 % untuk efisiensi termal dan 0.9 % untuk efisiensi termal listrik.
Simulasi Unjuk Kerja Kolektor Pelat Datar Dengan Absorber Pipa Spiral Ahmad Yonanda; Amrizal Amrizal
Jurnal Energi Dan Manufaktur Vol 15 No 1 (2022)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEM.2022.v15.i01.p03

Abstract

Simulasi kolektor surya pelat datar dilakukan untuk mengetahui pengaruh jarak antar pipa absorber berbentuk spiral terhadap unjuk kerja termal dan pressure drop kolektor surya pelat datar. Pengujian dilakukan dengan metode CFD. Material pelat dan pipa kolektor adalah tembaga dengan ukuran pelat 760 x 760 mm dan tebal 3 mm, diameter pipa adalah 8 mm, variasi jarak pipa spiral yang dipilih yaitu 25, 50 dan 75 mm. Fluida kerja yang digunakan adalah air dengan temperatur masuk 30oC dan laju aliran massa 0.015 kg/s, pada bagian atas permukaan kolektor diberi heat flux sebesar 825 W/m2. Simulasi dilakukan dengan kondisi steady state. Hasil penelitian menunjukkan bahwa pada kolektor spiral jarak susunan pipa absorber 25 mm menghasilkan nilai pressure drop terbesar yaitu 3927 Pa dan terendah terjadi pada kolektor spiral jarak susunan pipa absorber 75 mm yaitu sebesar 1603 Pa, temperatur keluar air tertinggi dihasilkan pada kolektor spiral 25 mm yaitu sebesar 35,124oC sementara temperatur keluar air terendah terjadi pada kolektor spiral 75 mm yaitu sebesar 34,824oC. Efisiensi termal tertinggi diperoleh pada kolektor spiral dengan jarak susunan pipa absorber 25 mm yaitu mencapai 86,854%.
Photovoltaic (PV) thermal performance simulation using segmentation lapping fin passive cooling Ahmad Yonanda; Amrizal Amrizal; Harmen Harmen; Ahmad Riszal; Fauzi Ibrahim
Jurnal POLIMESIN Vol 20, No 2 (2022): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v20i2.3041

Abstract

The sun is a renewable energy source that has several advantages such as being easy to obtain, free of pollution, and available in sufficient quantities. The heat energy received by the photovoltaic can cause an increase in surface temperature, resulting in a decrease in electrical efficiency. One of the efforts to increase photovoltaic electrical efficiency is using air cooling, by adding absorber fins or thermal photovoltaic (PV/T). The lapping type fin has superior performance in reducing the temperature of the PV module compared to the linear (conventional) fin type. The purpose of this study was to compare the performance of thermal PV using conventional fins with lapping segmentation fins carried out using the CFD approach using ANSYS Fluent. The simulation test procedures include: making linear fin geometry (conventional), linear lapping and segmentation lapping, conducting mesh quality studies, and determining boundary conditions and modeling parameters. Modeling variations in the direction of airflow 0°, 15°, 30°, 45°, 60°, 75°, and 90°. The numerical simulation results show that the use of segmented lapping fins can reduce the PV surface temperature by 1.79 °C or about 4.11% compared to conventional (linear) lapping in the airflow direction of 90º (parallel to the fins). The results of this study support the use of integrated PV and passive cooling systems to reduce efficiency losses in actual conditions, where there is a multidirectional airflow characteristic, which may not be advantageous for conventional heatsinks.
Application of Pelton Turbine in Pico Hydro Renewable Energy System at Sinar Negeri, Negeri Sakti Village Ibrahim, Fauzi; Yonanda, Ahmad; Nugraha, Nurcahya
Jurnal ELEMENTER (Elektro dan Mesin Terapan) Vol 9 No 2 (2023): Jurnal Elektro dan Mesin Terapan (ELEMENTER)
Publisher : Politeknik Caltex Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35143/elementer.v9i2.6188

Abstract

Some residents of Sinar Negeri Hamlet use the nearby spring as a place to raise freshwater fish. Residents have solely utilized this spring for everyday needs up until now, and it serves as the primary water source for fish ponds. Since technology would increase residents' productivity, they are excited about the chance to employ it in Sinar Negeri hamlet. Farmers also complain that there is no lighting surrounding the cultivation ponds, which makes it challenging for fish farmers to move around and perform their duties at night. Alternative small-scale power plants known as pico hydropower plants can be used in rural locations with rivers that continuously discharge water and a relatively modest waterfall to power a turbine that generates electricity. The spring has a head of 0.75 meters and a flow rate of 0,002 m3/s. Natural resource potential can be used to generate an environmentally friendly small-scale power plant using alternative energy. Through the use of turbine technology, potential energy from the water head and flow rate is converted into electrical energy produced by a generator with an approximate output of 8,79 watts.
Unjuk Kerja Termal Kolektor Surya PV/T Bersirip Menggunakan Metode Computing Fluid Dynamic Amrizal Nalis; Muhammad Irsyad; Ahmad Yonanda; Rizal Khairudin
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1878

Abstract

Photovoltaic Thermal (PV/T) collector is a device that can produce electrical energy and thermal energy simultaneously. However, the thermal energy increases the surface temperature of the PV and therefore it may reduce electrical efficiency. To overcome this problem, a finned thermal collector should be joined underneath the PV surface. The aim of this study is to simulate the thermal performance of a PV/T collector by using staggered fins with air as a working fluid. The parameters are varied from 25 to 50 mm in the fin geometry and from 12 to 48 g/s in air mass flow rate, respectively. Furthermore, the heat radiation used was 860 W⁄m2 and Computing Fluid Dynamic (CFD) method was implemented in this research. The results showed that the PV/T surface temperature decreased by 7.04 % for the fin height of 37.5 mm and 11.9 % for the fin height of 50 mm when compared to the fin height of 25 mm. Thus, a greater cooling of the PV/T surface occurs in the fin height of 50 mm due to an increase in the heat transfer area which might absorb more of the unused thermal energy in comparison with others.
Co-Authors Ahmad Riszal Amrizal Amrizal Amrizal Amrizal Amrizal Nalis Amrul Amrul Hadi Prayitno Harmen Harmen Harmen Harmen Harmen Harmen Ibrahim, Fauzi Muhammad Irsyad Nugraha, Nurcahya Rizal Khairudin