Fakhruddin, Ahmad (2025) Studi Numerik Peningkatan Kinerja Termal Pembangkit Listrik Solar Chimney Dengan Variasi Bentuk Permukaan Penyerapan. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Solar Chimney Power Plant (SCPP) merupakan sistem pembangkit listrik tenaga surya yang bekerja dengan menciptakan perbedaan temperatur di dalam sistem, sehingga menghasilkan aliran udara yang dapat dikonversi menjadi energi kinetik dan selanjutnya menjadi energi listrik. Efisiensi termal sistem ini sangat dipengaruhi oleh desain permukaan penyerap (absorber), yang berfungsi sebagai media penyerapan panas. Penelitian ini bertujuan untuk menganalisis pengaruh variasi bentuk geometri permukaan absorber serta ketinggiannya (H₀) terhadap kinerja termal sistem SCPP. Lima konfigurasi geometri permukaan absorber yang diteliti meliputi: desain standar (flat), 3-persegi, 4-persegi, 5-persegi, dan 6-persegi. Proses penelitian mencakup studi literatur, pemodelan, proses meshing, simulasi numerik, serta analisis hasil berdasarkan parameter kecepatan udara, temperatur, tekanan atmosfer, dan daya output. Hasil simulasi menunjukkan bahwa perubahan bentuk geometri permukaan absorber berpengaruh signifikan terhadap kinerja termal sistem. Dari berbagai variasi yang diuji, konfigurasi 3-persegi dan 5-persegi menunjukkan performa termal paling optimal. Selain itu, ketinggian permukaan absorber (H₀) juga memberikan kontribusi terhadap peningkatan efisiensi termal. Hasil terbaik diperoleh pada H₀ = 7,5 cm. Kombinasi desain 5-persegi dengan H₀ = 7,5 cm menghasilkan daya keluaran tertinggi sebesar 258,39 Watt, meningkat hingga 769% dibandingkan desain standar. Temuan ini membuktikan bahwa optimalisasi bentuk dan ketinggian absorber sangat berperan dalam meningkatkan efisiensi sistem SCPP.
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The Solar Chimney Power Plant (SCPP) is a solar power generation system that operates by creating a temperature difference within the system, resulting in an airflow that can be converted into kinetic energy and subsequently into electricity. The thermal efficiency of this system is highly influenced by the design of the absorber surface, which serves as the primary heat-absorbing component. This study aims to analyze the effect of absorber surface geometry variations and its height (H₀) on the thermal performance of the SCPP. Five absorber configurations were investigated: standard flat, 3-square, 4-square, 5-square, and 6-square designs. The research methods include literature review, modeling, meshing, numerical simulation, and result analysis based on airflow velocity, temperature, atmospheric pressure, and power output. The simulation results indicate that variations in absorber surface geometry significantly affect the thermal performance of the system. Among the tested designs, the 3- square and 5-square configurations demonstrated the best thermal performance. Furthermore, the absorber height (H₀) also contributed to system performance improvement, with the best results obtained at H₀ = 7.5 cm. The combination of the 5-square geometry and H₀ = 7.5 cm at y = 0.2 m generated the highest power output of 258.39 Watts an increase of up to 769% compared to the standard design. These findings confirm that optimizing both the surface geometry and absorber height plays a crucial role in enhancing the efficiency of SCPP systems
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Solar chimney; absorber geometry; divergent chimney; numerical simulation; ANSYS Fluent |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting. T Technology > TJ Mechanical engineering and machinery > TJ810.5 Solar energy |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis |
| Depositing User: | Ahmad Fakhruddin |
| Date Deposited: | 31 Jul 2025 02:08 |
| Last Modified: | 31 Jul 2025 02:08 |
| URI: | http://repository.its.ac.id/id/eprint/123502 |
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