Electronic Theses and Dissertation

Pembangkit listrik photovoltaic (PV) dapat memitigasi resiko perubahan iklim. Sayangnya, pertumbuhan sistem ini masih memiliki tantangan teknis selama proses penyerapan radiasi matahari. Suhu sel yang melebihi batas optimal berpengaruh terhadap efisiensi PV. Metode active: teknik water spray terbukti paling efektif untuk mengatasi masalah ini. Namun, penggunaan air tanpa pengontrol suhu menyebabkan air menjadi panas seiring waktu. Dalam penelitian ini, proses termofisika perangkat thermoelectric dan kontrol proportional, integral dan derivative (PID) telah berhasil dirancang untuk pendingin liquid. Pemodelan disajikan dalam bentuk transfer function yang dilinearisasi dengan System Identification MATLAB. Desain tersebut, diuji pada kondisi suhu lingkungan yang relatif tinggi. Eksperimen fisik pada modul PV dilakukan dengan dan tanpa teknik water spray. Hasil akhir menunjukkan bahwa pendingin liquid mampu mempertahankan suhu air pada nilai 25oC dengan akurat dan presisi. Setelah PID dioptimalkan, nilai overshoot dapat dikurangi hingga 3.25% dengan perolehan gain Kp 1.052, Ki 63.69, dan Kd 0.00029. Terakhir, sistem yang diusulkan secara efektif mampu meningkatkan efisiensi electrical ouput PV hingga 11.29%.
Kata kunci: Photovoltaic, Thermoelectric, PID, water-cooling.

Photovoltaic (PV) power plants can mitigate climate change risks. Unfortunately, the growth of this system still has technical challenges during the process of absorbing solar radiation. Cell temperatures that exceed the optimal limit affect PV efficiency. Active method: water spray technique has proven to be the most effective in dealing with this problem. However, using water without a temperature controller causes the water to become hot over time. In this study, the thermophysical process of thermoelectric device and proportional, integral, and derivative (PID) control have been successfully designed for liquid cooling. The modeling is presented in the form of a transfer function that is linearized with System Identification MATLAB. The design was tested at relatively high ambient temperature conditions. Physical experiments on PV modules were conducted with and without water spray. The final results show that the liquid cooler is able to maintain the water temperature at 25oC accurately and precisely. After PID is tuned, the overshoot value can be reduced to 3.25%, with gains Kp 1.052, Ki 63.69, and Kd 0.00029. Finally, the proposed system is effectively able to increase PV electrical output efficiency by up to 11.29%. Keywords: Photovoltaic, Thermoelectric, PID, water-cooling.