PURWANTO, Purwanto and Budiyono, Budiyono and Hermawan, Hermawan (2022) PEMODELAN RUNNER TURBINE CROS-FLOW DENGAN COMPUTATIONAL FLUID DYNAMICS PADA MIKROHIDRO TUBE YANG BERWAWASAN LINGKUNGAN. Doctoral thesis, School of Postgraduate Studies.

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Abstract

Pemanfaatan potensi sumber air yang melimpah khususnya di pedesaan belum dimanfaatkan secara maksimal sebagai sumber energi baru terbarukan (renewable energy) yang dapat dimanfaatkan untuk mendukung perekonomian masyarakat desa yang belum terjangkau oleh listrik PLN. Era Teknologi perkembangan program Computational fluid dynamics (CFD) sangat pesat membuat metode ini menjadi trend diberbagai bidang industri yang memanfaatkan sebagai pembanding data eksperiment murni dan teori murni. Program Computational fluid dynamics (CFD) merupakan perangkat lunak yang dapat menggantikan persamaan-persamaan integral dan deferensial parsial menjadi persamaaan aljabar yang terdiskritisasi (pertambahan, pengurangan, perkalian dan pembagian) dimana dapat diselesaikan dengan sebuah komputer untuk menghasilkan solusi berupa nilai-nilai aliran pada titik ruang dan waktu. Pemodelan Mikrohidro Tube dengan Computational fluid dynamics (CFD) ini bertujuan untuk mendapatkan Coefisien of Power (Cp) terbaik runner Cros-flow dengan panjang 130mm dan diameter 80mm pada mikrohidro tube. Parameter-parameter yang digunakan dalam mengetahui Coefisien of Power (Cp) sebuah runner cros-flow adalah sudut blade dan jumlah blade. Pemodelan runner cros-flow ini mengunakan sudut blade runner 100, 150, 200 dan 250 dan 300 dengan jumlah blade 8, 12, 16, 20, 24, 28, setelah dilakukan pemodelan CFD dan validasi (Makarim et all.,2019) menghasilkan coefisien of power (Cp) terbaik 31,65% pada pada runner sudut blade 200 dan jumlah blade 20 pada putaran 600 rpm. Berdasarkan Hasil data eksperiment maka terdapat kesesuaian dengan pemodelan Computational fluid dynamics (CFD) dimana hasil eksperimen menunjukan pada runner dengan blade 200 jumlah blade 20 dan head 4m menghasilkan efisiensi turbine sebesar 24,68% pada putaran runner 510 rpm dengan daya terbangkitkan tertinggi sebesar 1224,32 Watt. Mikrohidro tube memberikan solusi untuk 2500 desa yang belum terjangkau oleh listrik PLN karena pembangunan yang murah dan terjangkau, untuk daya 1224,32 Watt membutuhkan dana Rp 4.443.000,00.
Kata kunci : Runner, Cros-flow, Computational fluid dynamics, Coefisien of Power

Utilization of the potential of abundant water sources, especially in rural areas, has not been fully utilized as a source of new renewable energy that can be used to support the economy of rural communities that have not been reached by PLN electricity. In the technological era, the development of Computational fluid dynamics (CFD) programs is very rapid, making this method a trend in various industrial fields that use it as a comparison of pure experimental data and pure theory. Computational fluid dynamics (CFD) program is software that can replace integral and partial differential equations into discretized algebraic equations (addition, subtraction, multiplication and division) which can be solved by a computer to produce solutions in the form of flow values at points space and time. Microhydro Tube modeling with Computational fluid dynamics (CFD) aims to obtain the best Coefficient of Power (Cp) for the Cross-flow runner with a length of 130mm and a diameter of 80mm on a microhydro tube. The parameters used to determine the Coefficient of Power (Cp) of a cross-flow runner are the blade angle and the number of blades. This cross-flow runner modeling uses blade runner angles of 100, 150, 200 and 250 and 300 with the number of blades 8, 12, 16, 20, 24, 28, after CFD modeling and validation (Makarim et all., 2019) produces coefficients of power (Cp) the best 31.65% on the runner angle of the blade 200 and the number of blades 20 at 600 rpm. Based on the results of experimental data, there is conformity with Computational fluid dynamics (CFD) modeling where the experimental results show that the runner with 200 blades, the number of blades is 20 and the head is 4m, resulting in turbine efficiency of 24.68% at 510 rpm runner rotation with the highest generated power of 1224,32 Watts. Microhydro tube provides a solution for 2500 villages that have not been reached by PLN electricity due to cheap and affordable construction, for 1224.32Watt power, it costs Rp. 4,443,000.00.
Keywords : Runner, Cros-flow, Computational fluid dynamics, Coefisien of Power

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