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~ Studi Pemodelan Dan Simulasi Sel Bahan Bakar Membran

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~ Studi Pemodelan Dan Simulasi Sel Bahan Bakar Membran

STUDI PEMODELAN DAN SIMULASI SEL BAHAN BAKAR MEMBRAN PERTUKARAN PROTON (PROTON EXCHANGE MEMBRANE FUEL

Tugas akhir ini membahas studi pemodelan Sel Bahan Bakar Membran Pertukaran Proton (Proton Exchange Membrane Fuel Cell / PEMFC) dengan menggunakan software MATLAB/SIMULINK. Model PEMFC yang dikembangkan kemudian divalidasi dengan data hasil percobaan pada PEMFC Avista Labs tipe SR-12 500-W dari referensi[5]. Hasil simulasi menunjukkan bahwa secara umum, karakteristik PEMFC yang dimodelkan sudah mendekati karakteristik PEMFC pada hasil percobaan dari referensi. Akan tetapi grafik model PEMFC memiliki kemiringan yang lebih kecil dibandingkan hasil percoban karena nilai jatuh tegangan ohmik pada model lebih rendah dari nilai yang sebenarnya.

Oleh karena itu, dibutuhkan koreksi dengan pendekatan empiris untuk memodelkan nilai jatuh tegangan ohmik. Setelah dilakukan koreksi, berhasil didapatkan karakteristik model PEMFC yang lebih mendekati karakteristik PEMFC hasil percobaan dari referensi. Selain itu, dilakukan pula simulasi PEMFC untuk melihat karakteristik respon pengasutan (start-up) dan keadaan mantap (steady-state) model untuk beban tetap. Hasil simulasi menunjukkan tegangan PEMFC mencapai keadaan mantap setelah sekitar 0,3 detik.

Besarnya penurunan tegangan keluaran dipengaruhi terutama oleh jatuh tegangan akibat efek kapasitansi lapisan ganda. Sedangkan pada respon suhu, di awal pegoperasian suhu PEMFC akan naik secara drastis kemudian setelah 1500 detik kenaikannya semakin lambat dan akhirnya suhu cenderung konstan setelah 2500 detik. Simulasi yang terakhir adalah penghitungan biaya hidrogen dan oksigen pada pembangkitan listrik oleh PEMFC. Hasil simulasi menunjukkan biaya total hidrogen dan oksigen PEMFC skala 500 W berkisar antara Rp 3.164,86 / kWh sampai Rp 5.046,60 / kWh.

Deskripsi Alternatif :

In this final project, Proton Exchange Membrane Fuel Cell (PEMFC) Modeling and Simulation Study are presented using MATLAB/SIMULINK software environments. The model main characteristic are validated by experimental data taken from reference[5] at an Avista Labs SR-12 500-W PEMFC stacks. Simulation results show that the PEMFC model characteristics is quite agree with experimental data results. However, the PEMFC model graph is have a lower slope than experimental data graph because ohmic voltage drop value in the model is lower than the real value. So, empirical approach is needed for obtain ohmic voltage drop more precisely.

After correction were made,PEMFC model results are better and more agree to the experimental data. Another simulation was made to see start-up response characteristic of a PEMFC model for a constant load. Simulation results show that the voltage response from start-up to steady state has through 0,3 seconds. The value of output voltage drop is mainly influenced by double layer capacitance voltage drop. At start-up temperature response, model temperature will increase very quickly at starting point then goes slowly after 1500 seconds, and at last inclined to be constant after 2500 seconds. The last simulation was a calculation of PEMFC model hydrogen and oxygen cost to generate electricity. Simulation results show that total hydrogen and oxygen cost of PEMFC model are ranging from Rp 3.164,86/kWh to Rp 5.046,60/kWh.

 by ITB Central Library. Verbatim copying and distribution of this entire article is permitted by author in any medium, provided this notice is preserved.

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