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All Journal MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering
Remon Lapisa
[1] Departemen Teknik Mesin, Fakultas Teknik, Universitas Negeri Padang, [2] Center for Energy and Power Electronics Research, Universitas Negeri Padang
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Industrial & Manufacturing Engineering

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Comparative Study of Numerical and Experimental Analysis of Micro Hydro Power Plant in Nagari Koto Hilalang Solok Regency Khairuni Delfi Anisa; Arwizet K; Remon Lapisa; Mulianti Mulianti
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 5 No 1 (2023): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (681.783 KB) | DOI: 10.46574/motivection.v5i1.188

Abstract

Indonesia has the potential to produce large amounts of electrical energy by utilizing sustainable energy, especially water energy. There are still many areas that are far from urban areas that do not have electricity, especially remote areas. One of them is Nagari Koto Hilalang, Solok Regency, which has built a Micro Hydro Power Plant (PLTMH). The purpose of this research was to determine the capacity and potential of PLTMH in Nagari through simulation. This research uses the Computational Fluid Dynamics (CFD) simulation method with the Ansys Fluent 2021 R2 Student Version software. The magnitude velocity simulation values for the inlet velocity 12.44 m/s, 13.28 m/s, and 13.65 m/s produce different maximum values for the runner. The resulting torque has a value of 110.5 Nm. The exact output power generated by the Ansys simulation has a value of 10.78 kW. The efficiency of the turbine with a power of 10.78 kW obtained from the simulation results is 66%. Indonesia memiliki potensi untuk menghasilkan energi listrik yang besar dengan memanfaatkan energi yang berkelanjutan terutama energi air. Masih banyak daerah yang jauh dari perkotaan belum teraliri oleh listrik terutama daerah terpencil. Salah satunya Nagari Koto Hilalang, Kabupaten Solok yang sudah dibangun Pembangkit Listrik Tenaga Mikro Hidro (PLTMH). Tujuan dari penelitian ini adalah untuk mengetahui kapasitas dan potensi PLTMH yang ada di nagari tersebut melalui simulasi. Penelitian ini menggunakan metode simulasi Computational Fluid Dynamics (CFD) dengan software Ansys Fluent 2021 R2 Student Version. Nilai simulasi kecepatan magnitude untuk velocity inlet 12,44 m/s, 13,28 m/s dan 13,65 m/s menghasilkan nilai maksimum yang berbeda pada runner. Torsi yang dihasilkan memiliki nilai 110,5 Nm. Daya luaran yang tepat yang dihasilkan oleh simulasi Ansys memiliki nilai 10,78 kW. Efisiensi pada turbin dengan daya 10,78 kW yang didapat dari hasil simulasi yaitu 66%.
Ground-Air Heat Exchanger as Passive Cooling In Building Ventilation Ferdi Syaputra S; Remon lapisa; Bulkia Rahim; Rizky Ema Wulansari
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 5 No 2 (2023): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (874.505 KB) | DOI: 10.46574/motivection.v5i2.222

Abstract

Energy consumption for air conditioning systems and thermal comfort in a building in Indonesia is quite high. The solution that can be developed is to use the thermal inertia stored in the soil. This research aims to design and test the effectiveness of heat transfer between soil-air as a passive coolant in building ventilation systems. This research was conducted for 48 hours, the incoming air velocity was 4.68 m/s, the measurement results showed various weather and temperature conditions including average light intensity of 1822.6 Lux, average ambient temperature of 28.4 °C, average humidity of 99.4%, average room temperature of 30 °C, average water temperature of 28 °C and average soil temperature of 28.1 °C and maximum effectiveness value of 2.46 and minimum air value of 0.9. Experimental results show that groundwater-air heat transfer used as passive cooling in building ventilation systems can provide good performance with temperature reductions reaching 2-10°C. Konsumsi energi untuk sistem pengkondisian udara dan kenyamanan termal bangunan di Indonesia cukup tinggi. Salahsatu solusi yang dikembangkan ialah menggunakan inersia termal yang tersimpan di dalam tanah. Penelitian ini bertujuan untuk merancang-bangun serta menguji efektivitas perpindahan kalor antara tanah-udara sebagai pendingin pasif pada sistem ventilasi bangunan. Penelitian dilakukan selama 48 jam dan kecepatan udara masuk 4,68 m/s, hasil pengukuran menunjukan berbagai kondisi cuaca maupun suhu meliputi intensitas cahaya rata-rata 1822,6 Lux, temperature lingkungan rata-rata 28,4 °C, kelembapan rata-rata 99,4 %, temperature ruangan rata-rata 30 °C, temperatur air rata-rata 28 °C dan temperatur tanah rata-rata 28,1 °C dan nilai efektivitas maksimum sebesar 2,46 dan nilai minimum udara sebesar 0,9. Hasil penelitian menunjukkan bahwa perpindahan kalor air tanah-udara yang digunakan sebagai pendingin pasif pada sistem ventilasi bangunan memiliki kinerja yang cukup baik dengan pengurangan temperatur mencapai 2-10°C.
Co-Authors Arwizet Arwizet, Arwizet Bulkia Rahim Ferdi Syaputra S Khairuni Delfi Anisa Mulianti Rizky Ema Wulansari